Battery and power consuming device

Abstract

The application relates to the technical field of battery structures, in particular to a battery and an electric device, the battery comprising a circuit protection assembly and an electric core assembly, the electric core assembly comprising at least two electric cores arranged at intervals along a first direction, among the two adjacent electric cores, one electric core is provided with a first side surface and a second side surface arranged adjacently, the other electric core is provided with a third side surface and a fourth side surface arranged adjacently, the first side surface and the third side surface are arranged towards each other along the first direction, the first side surface is provided with a first lug, the second side surface is provided with a second lug, the third side surface is provided with a third lug, and the fourth side surface is provided with a fourth lug, the circuit protection assembly is located above the second side surface and the fourth side surface and partially extends between the two adjacent electric cores, and the first lug, the second lug, the third lug and the fourth lug are connected to the circuit protection assembly respectively. Through the above arrangement, the battery and the electric device can improve the electrical connection safety, the space utilization and the battery capacity.

Description

Technical Field

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

[0002] As portable electronic devices become more integrated, their internal space becomes more compact, leading to higher demands from users regarding battery capacity and structural layout. To improve battery life, multi-cell battery structures are generally adopted.

[0003] However, existing multi-cell batteries have the following problems in structural integration: On the one hand, the protection board usually spans the entire battery head structure, occupying too much lateral space, which limits the effective design size of the cells and makes it difficult to increase capacity within a limited space. On the other hand, the existing cell tabs are mostly located on the same side of the cell, which not only requires the protection board to be connected across a long distance to connect all the tabs, increasing the internal space occupied by the battery, but also makes the distance between the tabs relatively short, which can easily lead to risks such as short circuits.

[0004] Furthermore, in traditional packaging structures, the side seals of the battery cell fold to form a protrusion that lifts the battery head, resulting in an increase in the overall length of the battery. Since the space for installing the battery in electronic devices is relatively limited, this restricts the battery's capacity.

[0005] Therefore, how to optimize the connection layout of multiple cells and protection boards within a limited space, while taking into account electrical connection safety, space utilization and battery capacity, has become an urgent technical problem to be solved. Summary of the Invention

[0006] This application provides a battery and an electrical device to solve the above-mentioned technical problems and improve electrical connection safety, space utilization and battery capacity.

[0007] In a first aspect, embodiments of this application provide a battery, comprising:

[0008] Circuit protection components;

[0009] A battery cell assembly includes at least two battery cells, which are arranged at intervals along a first direction. In two adjacent battery cells, one battery cell has a first side and a second side arranged adjacently, and the other battery cell has a third side and a fourth side arranged adjacently. The first side and the third side are arranged facing each other along the first direction. The first side has a first tab, the second side has a second tab, the third side has a third tab, and the fourth side has a fourth tab.

[0010] The circuit protection component is located on top of the second side and the fourth side, and partially extends between two adjacent cells. The first tab, the second tab, the third tab and the fourth tab are respectively connected to the circuit protection component.

[0011] In one possible embodiment, the circuit protection assembly includes a first connection portion extending between two adjacent cells, with a first tab and a third tab respectively connected to the first connection portion.

[0012] In one possible embodiment, a first clearance groove is provided on the first side and a second clearance groove is provided on the third side. The first electrode is located in the first clearance groove and the third electrode is located in the second clearance groove.

[0013] In one possible embodiment, the first clearance groove is located at the junction of the first side and the second side, and the second clearance groove is located at the junction of the third side and the fourth side.

[0014] In one possible embodiment, the first clearance groove and the second clearance groove are arranged facing each other to form a receiving groove, and at least a portion of the first connecting portion extends into the receiving groove.

[0015] In one possible embodiment, it further includes an injection molded part disposed in the receiving groove and covering the first connecting portion, the first electrode tab, and the third electrode tab.

[0016] In one possible embodiment, the circuit protection component further includes a second connection portion and a third connection portion, which are disposed on both sides of the first connection portion and are respectively connected to the second tab and the fourth tab.

[0017] In one possible embodiment, the circuit protection component includes a circuit board, with the circuit board and the battery cell arranged at intervals along a second direction. The second connection portion and the third connection portion are both disposed on the same side of the circuit board away from or close to the battery cell. The thickness direction of the circuit board is parallel to the second direction, and the second direction is perpendicular to the first direction.

[0018] In one possible embodiment, the first connection portion is disposed on the side of the circuit board closer to the battery cell, and the second and third connection portions are both disposed on the side of the circuit board away from the battery cell.

[0019] In one possible embodiment, the circuit board includes a flat portion and at least one bent portion, with a first connecting portion, a second connecting portion and a third connecting portion all disposed on the flat portion, and the bent portion connected to the flat portion.

[0020] In one possible embodiment, the circuit protection component further includes a protection module, and the protection module and the first connection portion are disposed on both sides of the circuit board.

[0021] Secondly, embodiments of this application provide an electrical device including the battery described above.

[0022] This application provides a battery and an electrical device. The battery optimizes the arrangement of adjacent cells in a cell assembly, arranging at least two cells spaced apart along a first direction. The first and third sides of two adjacent cells face each other along the first direction, and second and fourth tabs are respectively led out from the second and fourth sides. A circuit protection component is located above the second and fourth sides, spanning and overlapping the second and fourth tabs near the side of the circuit protection component. A portion of the circuit protection component extends between the two cells to facilitate connection of the facing first and third tabs. This layout changes the traditional method where a protection board needs to span the entire cell to connect tabs on the same side, thereby reducing the space occupied within the battery.

[0023] Furthermore, since the first and third tabs are respectively located on the sides of the corresponding battery cells, the side sealing edges of the battery cells do not need to be folded at a large angle to form a protruding structure, thus avoiding the lifting of the battery head structure. In the limited space available for battery assembly in electrical equipment, the space saved by the circuit protection components and the protruding structure can be used to increase the capacity of the battery cells themselves. Additionally, in two adjacent battery cells, one cell has adjacent first and second sides, and the other cell has adjacent third and fourth sides. By placing the first and second tabs on adjacent sides of one cell (i.e., the first and second sides), and the third and fourth tabs on adjacent sides of the other cell (i.e., the third and fourth sides), the risk of short circuits caused by tabs on the same side being too close is avoided. Through the above arrangements, the battery and electrical equipment of this application can improve electrical connection safety, space utilization, and battery capacity. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 This is a first schematic diagram of a battery and electrical device provided in an embodiment of this application;

[0026] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0027] Figure 3 A schematic diagram of the first battery cell provided in an embodiment of this application;

[0028] Figure 4 A schematic diagram of the second battery cell provided in an embodiment of this application;

[0029] Figure 5 A first front view of the circuit protection component provided in an embodiment of this application;

[0030] Figure 6 A first top view of the circuit protection assembly provided in an embodiment of this application;

[0031] Figure 7 A second front view of the circuit protection component provided in an embodiment of this application;

[0032] Figure 8 A second top view of the circuit protection assembly provided in an embodiment of this application;

[0033] Figure 9 This is a second schematic diagram of the battery and electrical equipment provided in the embodiments of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Battery; 100. Circuit protection assembly; 110. First connecting part; 120. Second connecting part; 130. Third connecting part; 140. Circuit board; 1401. Flat part; 1402. Bending part; 14021. First extension part; 14022. Second extension part; 150. Component; 160. Protection module; 200. Cell assembly; 210. Cell; 2101. First cell; 2102. Second cell; 211. First side; 2111. First clearance groove; 212. Second side; 2121. Third clearance groove; 213. Third side; 2131. Second clearance groove; 214. Fourth side; 2141. Fourth clearance groove; 215. Receiving groove; 220. First tab; 230. Second tab; 240. Third tab; 250. Fourth tab; 300. Injection molded part;

[0036] 1. Electrical equipment; 20. Mainboard; 201. Receiving slot.

[0037] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, 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.

[0039] Lithium-ion battery packaging and integration technology is widely used in smartphones, tablets, wearable devices, and other portable electronic devices. Inside these devices, the battery is typically housed alongside the motherboard, connectors, camera module, speaker, and structural support components within the limited space of the electronic device. This necessitates both achieving a slim and lightweight design while providing sufficient battery life. To increase battery capacity and avoid excessive increases in device thickness, multi-cell combination solutions have become quite common.

[0040] In multi-cell battery configurations, at least two cells are typically arranged side-by-side inside the electronic device. Sampling, protection, and external electrical connections are achieved through circuit protection components located in the battery head region (the end area of ​​a single battery cell or module where electrode terminals, tabs, and circuit protection components are centrally located; this area primarily facilitates current collection from the internal tabs, the integration of circuit protection components, and the interface for external electrical connections). Conductivity between multiple cells and the protection circuit is then established using tabs and conductive connectors. Since the battery head region is often adjacent to the mainboard or interface area, its available space is inherently limited. Therefore, the arrangement of the multiple cells, the tab lead-out position, and the connection configuration of the circuit protection components directly affect the battery's footprint in the overall device, its assembly flexibility, and the final effective cell size.

[0041] Most existing portable electronic devices use a battery architecture with multiple cells arranged side by side, and their circuit protection components are usually concentrated in the battery end area near the mainboard. To achieve current convergence and protection of multiple cells, the conventional approach is to guide all the tabs of each cell to the same side for centralized connection. This requires the protection board to cover all tab connection points to perform overcurrent, overvoltage, and short-circuit protection functions. This layout results in the protection board and its connection structure occupying a large amount of planar space in the battery end area.

[0042] The aforementioned centralized layout reveals significant drawbacks in scenarios with limited internal space: First, the large-area flat layout of the protection board and its connection structure at the battery end compresses the extension space of the cell body along its length, limiting the increase in battery capacity. Second, the concentrated lead-out of the tabs on the same side results in a longer connection path, requiring extensive bridging of conductive connectors. This not only increases assembly complexity but also leads to an increase in the stacking thickness at the battery end area, hindering the design of a thinner and lighter device.

[0043] Furthermore, the overlapping and concentration of the tabs of multiple battery cells at the same end area necessitates multiple bridging connections, easily causing congestion in that area and increasing the risk of interference during welding and fixing. Especially within confined equipment cavities, if the tab orientation does not align well with the protective plate position, it can lead to excessive bending of conductive components, localized stress concentration, and insufficient safety clearance at the edges of the battery cells, thereby causing assembly redundancy, decreased electrical connection stability, and potential electrical safety hazards.

[0044] Furthermore, since the tabs are usually not optimally positioned on the side of the cell, the side seal of the cell often forms a hard protrusion after folding. This protrusion will push up the end structure of the battery, thereby occupying space inside the device.

[0045] It is evident that traditional multi-cell solutions, facing continuously increasing capacity demands and increasingly compact internal space in terminals, are finding it difficult to simultaneously achieve electrical connection safety, space utilization, and battery capacity. Therefore, optimizing the connection layout of multi-cell components and circuit protection devices within limited installation space, and reducing the space occupied by inactive components, has become an urgent technical challenge.

[0046] To solve the above technical problems, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 This application provides a battery 10, which includes a circuit protection assembly 100 and a cell assembly 200. The cell assembly 200 includes at least two cells 210 spaced apart along a first direction. Adjacent cells 210 have tabs on adjacent sides: one cell 210 has a first tab 220 on its first side 211 and a second tab 230 on its second side 212; the other cell 210 has a third tab 240 on its third side 213 and a fourth tab 250 on its fourth side 214, with the first side 211 and the third side 213 facing each other along the first direction. The circuit protection assembly 100 is located above the second side 212 and the fourth side 214 and partially extends between adjacent cells 210. The first tab 220, second tab 230, third tab 240, and fourth tab 250 are respectively connected to the circuit protection assembly 100.

[0047] It should be understood that by optimizing the arrangement of adjacent cells 210 in the cell assembly 200, at least two cells 210 are arranged at intervals along a first direction, and the first side 211 and third side 213 of two adjacent cells 210 are arranged facing each other along the first direction, with second tabs 230 and fourth tabs 250 respectively led out from the second side 212 and fourth side 214. The circuit protection assembly 100 is located above the second side 212 and fourth side 214, and spans across the second tab 230 and fourth tab 250 near the side of the circuit protection assembly 100. A portion of the structure of the circuit protection assembly 100 extends between the two cells 210 to facilitate the connection of the first tab 220 and the third tab 240. This layout changes the traditional method where the protection board needs to span the entire cell 210 to connect the tabs on the same side, thereby reducing the space occupied within the battery 10.

[0048] Furthermore, since the first tab 220 and the third tab 240 are respectively located on the side of the corresponding cell 210, the side sealing edge of the cell 210 does not need to be folded at a large angle to form a protruding structure, thus avoiding lifting the head structure of the battery 10 (wherein, the head structure of the battery refers to the end structure on the battery cell or battery module specifically used to centrally arrange and fix the tabs, protection board, and realize external electrical connection). For the limited space in the electrical equipment 1 used for assembling the battery, the space saved by the circuit protection component 100 and the protruding structure can be used to increase the capacity of the cell 210 itself. Furthermore, in two adjacent battery cells 210, one cell 210 has a first side 211 and a second side 212 arranged adjacently, and the other cell 210 has a third side 213 and a fourth side 214 arranged adjacently. By distributing the first tab 220 and the second tab 230 on adjacent sides of one cell 210 (i.e., first side 211 and second side 212), and distributing the third tab 240 and the fourth tab 250 on adjacent sides of the other cell 210 (i.e., third side 213 and fourth side 214), the risk of short circuits caused by the tabs on the same side being too close together is avoided. Through the above arrangement, the battery 10 of this application can improve electrical connection safety, space utilization, and battery capacity.

[0049] It should be noted that, for ease of understanding, such as Figure 1 and Figure 2 As shown, the circuit protection assembly 100 is located above the second side 212 and the fourth side 214. The term "above" refers to... Figure 1 The view shown is a relative orientation defined by reference, specifically referring to the side of the cell assembly 200 along the second direction that is close to the second side 212 and the fourth side 214.

[0050] The embodiments of this application will now be described with reference to the accompanying drawings.

[0051] See Figure 1 and Figure 2 This application provides a battery 10, including a circuit protection assembly 100 and a cell assembly 200. The cell assembly 200 includes at least two cells 210 spaced apart along a first direction. In two adjacent cells 210, one cell 210 has a first side 211 and a second side 212 arranged adjacently, and the other cell 210 has a third side 213 and a fourth side 214 arranged adjacently. The first side 211 and the third side 213 are arranged facing each other along the first direction. The first side 211 has a first tab 220, the second side 212 has a second tab 230, the third side 213 has a third tab 240, and the fourth side 214 has a fourth tab 250. The circuit protection assembly 100 is located above the second side 212 and the fourth side 214 and partially extends between the two adjacent cells 210. The first tab 220, the second tab 230, the third tab 240, and the fourth tab 250 are respectively connected to the circuit protection assembly 100.

[0052] The circuit protection component 100 is used to perform electrical connection, sampling and protection control for the charging and discharging process of the battery 10. Specifically, it can realize detection and disconnection actions under abnormal conditions such as overcurrent, overvoltage, undervoltage, short circuit and temperature rise. It constitutes the interface unit for the external output and internal safety management of the battery 10.

[0053] Specifically, the circuit protection component 100 of this embodiment differs from the traditional protection board that spans the head of the battery 10. By connecting the first tab 220 and the third tab 240 facing each other in two adjacent cells 210, and simultaneously spanning the second tab 230 and the fourth tab 250 near the side of the circuit protection component 100, multiple connection points that would normally be concentrated on the same side of the cell 210 are distributed to adjacent sides of the cell 210, thus eliminating the need to reserve a large area of ​​space for the circuit protection component 100. Moreover, since the first tab 220 and the third tab 240 are respectively located on the side of the corresponding cell 210, the side seal of the cell 210 does not need to be folded at a large angle to form a protruding structure, avoiding lifting the head structure of the battery 10. This avoids the protrusion formed after folding the side seal from lifting the head space of the battery 10, thereby improving space utilization and helping to increase the capacity of the battery 10.

[0054] It should be noted that, in different embodiments, the circuit protection component 100 includes a rigid circuit board, a flexible circuit board, or a rigid-flexible combined circuit board. It can also be further combined with a protection chip, a sampling resistor, a MOS (Metal-Oxide-Semiconductor) switch, a fuse, and a reinforcing sheet to form an integrated protection module. The circuit board can be made of FR-4 (Flame Retardant 4) substrate, polyimide flexible substrate, copper foil trace layer, or composite insulation layer to adapt to different space conditions and assembly methods.

[0055] Furthermore, the overall thickness of the circuit protection assembly 100 is typically limited by the stacking height of the battery cells 210 and is therefore designed as a thin structure, with its lateral dimension generally less than one-third to one-half of the total width of two adjacent battery cells 210. Moreover, the second side 212 and the fourth side 214 are both located close to the circuit protection assembly 100, which spans and connects to the second tab 230 and the fourth tab 250, enabling stable wiring and reliable soldering within a limited space.

[0056] Specifically, the cell assembly 200 is an energy storage unit composed of at least two cells 210, which are arranged at intervals along a first direction to improve structural compactness. This cell assembly 200 is used to ensure the energy storage capacity of the battery 10.

[0057] Furthermore, in actual implementation, the battery cell 210 should be a stacked structure, preferably a soft-pack battery cell 210 with aluminum-plastic film encapsulation, in order to meet the requirements of strength, thermal conductivity and thinness.

[0058] In addition, the spacing between adjacent cells 210 can be set according to assembly tolerances, insulation requirements and thermal expansion compensation. This spacing facilitates the lead-out of the first tab 220 and the third tab 240 and the bridging of the circuit protection component 100, avoiding the low space utilization caused by the concentration of tabs on the same side in the traditional solution.

[0059] It should be noted that, see Figure 1 , Figure 2 , Figure 3 and Figure 4 In two adjacent battery cells 210, one battery cell 210 has a first side 211 and a second side 212 that are arranged adjacently, and the other battery cell 210 has a third side 213 and a fourth side 214 that are arranged adjacently.

[0060] To illustrate the above components more clearly, the following definitions apply: Among two adjacent battery cells 210, the battery cell 210 with the first side 211 and the second side 212 is the first battery cell 2101; the battery cell 210 with the third side 213 and the fourth side 214 is the second battery cell 2102.

[0061] Specifically, for the first battery cell 2101, the first side 211 is used to set the first tab 220, and the second side 212 is used to set the second tab 230. The adjacent arrangement of the first side 211 and the second side 212 allows the different tabs of the first battery cell 2101 (i.e., the first tab 220 and the second tab 230) to be respectively assigned to different connection positions.

[0062] In the above configuration, the first cell 2101, through its side-mounted tabs, not only changes the traditional method where the protection board needs to span the entire cell 210 to connect the tabs on the same side, reducing the space ratio within the battery 10, but also avoids the risks of congestion and short circuits caused by multiple tabs being concentrated on one side of the cell 210.

[0063] More specifically, the first side 211 of the first battery cell 2101 and the third side 213 of the second battery cell 2102 are arranged facing each other along a first direction so that the first tab 220 and the third tab 240 are arranged between the first side 211 and the third side 213; the second side 212 of the first battery cell 2101 is arranged towards the circuit protection component 100 so that the second tab 230 located on the second side 212 can be directly connected to the circuit protection component 100 over a short distance, thereby shortening the connection path.

[0064] More specifically, the first cell 2101 can adopt a square structure with flat sidewalls, or a structure with partial folded edges, tab windows or side insulation edging; its material can be an aluminum shell to match aluminum tabs (i.e., the first tab 220 and the second tab 230), a steel shell to match nickel tabs, or a soft-pack aluminum-plastic film to match copper-nickel composite tabs.

[0065] In addition, the side dimensions of the first cell 2101 and the lead-out widths of the first tab 220 and the second tab 230 are usually matched according to the electrode size, welding window and insulation distance inside the first cell 2101 to ensure that the welding surface of the above-mentioned tabs has sufficient connection strength and to avoid interference with adjacent components.

[0066] Specifically, the second battery cell 2102 has a third side 213 and a fourth side 214 arranged adjacent to each other. The third side 213 faces the first side 211 of the first battery cell 2101 along a first direction, while the fourth side 214 faces the circuit protection assembly 100. The second battery cell 2102 and the first battery cell 2101 together constitute a dual-cell structure (e.g., ...). Figure 1 (As shown in the illustration, for illustrative purposes only), enabling the battery 10 to output electrical energy in collaboration with the first cell 2101 through the second cell 2102.

[0067] The third side 213 is used to set the third tab 240, and the fourth side 214 is used to set the fourth tab 250. The third tab 240 and the fourth tab 250 are respectively used to establish an electrical connection with the circuit protection component 100. By arranging tabs on adjacent sides through the first cell 2101 and the second cell 2102, the internal connection of the battery 10 is no longer limited to the concentrated current collection on a single side, thereby optimizing the spatial layout.

[0068] It should be noted that the second cell 2102 may be the same as the first cell 2101 in shape, or may be a variant with different thickness, length or shell material due to capacity or structural requirements. However, there should be an assembly gap between it and the first cell 2101 sufficient to accommodate the first tab 220, the third tab 240, the connecting piece and the insulating parts.

[0069] Additionally, a first tab 220 is disposed on the first side 211. It is a conductive connection terminal led out from the current collector inside the cell 210, mainly used to lead the current of the first cell 2101 to the circuit protection component 100 and participate in sampling or current collection. The function of the first tab 220 is not only to conduct current, but also to provide a clear potential interface for different circuits inside the battery 10, so that the circuit protection component 100 can independently identify the state of the corresponding cell 210.

[0070] It should be noted that the aforementioned tabs can be aluminum foil tabs, nickel foil tabs, copper foil tabs, or copper-nickel composite tabs. Depending on the welding process, nickel-plated metal strips, composite-coated tabs, or multi-layered tabs can also be used. Their form can be straight, bent, or an extended structure with welded lugs. The length and extension direction of the first tab 220 are typically designed based on the distance between it and the circuit protection component 100 to ensure connection is achieved without excessive bending stress and to guarantee that the solder joint is located in an area conducive to welding and heat dissipation.

[0071] The second tab 230 is disposed on the second side 212, and it cooperates with the fourth tab 250 to form another set of interfaces that are connected across by the circuit protection component 100. The function of the second tab 230 is to lead the electrical connection terminal on the other side of the first cell 2101 to the circuit protection component 100, so that the circuit protection component 100 can complete the connection across a local area of ​​the cell 210, without having to concentrate all the tabs on the same side of the cell 210.

[0072] It should be noted that the second tab 230 can be made of the same or different conductive material as the first tab 220, and different metal composite layer structures can be selected according to the polarity of the battery cell 210, the series and parallel connection method, and the welding compatibility; its shape can be a flat sheet, a bent transition type, or a locally widened welded type. The arrangement position of the second tab 230 should correspond to the bridging trace or connecting piece of the circuit protection component 100, so that it forms a stable, short-path, and uniformly stressed electrical connection interface in the local space, thereby reducing the span length of the connector and the welding difficulty.

[0073] The third tab 240 is disposed on the third side 213 and together with the first tab 220 constitutes the main electrical connection terminal of the first cell 2101 and the second cell 2102 on the opposite side. The function of the third tab 240 is to be connected to the circuit protection component 100 respectively with the first tab 220, so that the circuit protection component 100 can perform independent detection, current shunting or combined control according to the cell 210 corresponding to different tabs.

[0074] It should be noted that the third tab 240 can be similar to the first tab 220 in terms of material, structure, and connection method, or it can be configured as a non-circular tab, a stepped tab, or an extended tab according to wiring requirements; its installation position should be opposite to the first side 211 so as to form a clear connection zone when the cells 210 are close to each other. The size of the third tab 240 is usually determined based on the current carrying capacity, welding area, and local heat dissipation requirements to ensure reliable conduction during long-term charging and discharging.

[0075] The fourth tab 250 is disposed on the fourth side 214 and cooperates with the second tab 230 to form another set of electrical connection points bridging the circuit protection component 100. The function of the fourth tab 250 is to provide the circuit protection component 100 with a connection terminal corresponding to the second cell 2102, so that the circuit protection component 100 can complete the connection and protection of the second cell 2102 in the spanning layout.

[0076] It should be noted that the fourth tab 250 can be made of the same metal material as the aforementioned tabs, or a composite tab form more suitable for bending or attachment can be selected according to the wiring path of the circuit protection assembly 100; in terms of specific form, it can be a single-layer metal sheet, a multi-layer stacked sheet, or a welded tab with a local reinforcement area. The fourth tab 250 is located close to the circuit protection assembly 100, which facilitates welding or crimping without increasing connection backlash, thereby improving assembly consistency and reducing local stress concentration.

[0077] Based on the above analysis, this application provides a battery 10, which includes a circuit protection component 100 and a cell component 200. In the cell component 200, at least two cells 210 are arranged at intervals along a first direction. Adjacent cells 210 are provided with multiple tabs on opposite sides and sides close to the protection component, and are respectively connected to the circuit protection component 100 by a first tab 220 and a third tab 240. At the same time, a second tab 230 and a fourth tab 250 are connected across the circuit protection component 100.

[0078] During operation, when the battery cell assembly 200 is in a charging or discharging state, the current generated inside each cell 210 is output to the circuit protection assembly 100 through the corresponding side tabs. The circuit protection assembly 100 detects the voltage, current and temperature rise of each node through a sampling circuit, and controls the switching device to cut off or limit the current path when an abnormal operating condition is detected. At the same time, since the first side 211 and the third side 213 are arranged facing each other along the first direction, and the second side 212 and the fourth side 214 are close to the circuit protection assembly 100, the circuit protection assembly 100 can distribute the multiple connection points that originally needed to be centrally arranged to different sides in a bridging manner.

[0079] Furthermore, since the first tab 220 and the third tab 240 are respectively located on the side of the corresponding cell 210, the side seal of the cell 210 does not need to be folded at a large angle to avoid the head structure. This avoids the protrusion formed after the side seal is folded, which would lift the head space of the battery 10. The space saved can be used to increase the effective size of the cell 210, thereby improving the energy density of the battery 10 while ensuring electrical connection safety. It should be understood that the above example is only illustrative and not limiting. Without departing from the concept of this application, the number of tabs, the connection method, the form of the circuit protection component 100, and the arrangement of the cells 210 can all be adapted.

[0080] Based on the foregoing embodiments, further see... Figure 1 and Figure 2 The circuit protection component 100 includes a first connection portion 110, which extends between two adjacent battery cells 210. A first tab 220 and a third tab 240 are respectively connected to the first connection portion 110.

[0081] In this application, the first connection part 110 is a conductive area on the circuit protection component 100 used to collect the current of the first tab 220 and the third tab 240. Its function is to connect the current of the two cells 210 into the circuit protection component 100 in a unified manner so as to facilitate the subsequent charging and discharging control of the battery 10.

[0082] In one possible embodiment, the first connection portion 110 may be a nickel sheet structure, which is disposed as the first connection portion 110 on the side of the circuit protection component 100 near the cell component 200 and within the corresponding arrangement range of the first tab 220 and the third tab 240, so that the two tabs can establish electrical connections with the first connection portion 110 respectively with a shorter path, thereby reducing lead length and local stacking thickness.

[0083] The first connecting part 110 can be connected to the first electrode 220 and the third electrode 240 by laser welding, ultrasonic welding, crimping or curing with conductive adhesive to form a fixed electrical connection; the first connecting part 110 is used to carry current, transmit sampling signals and provide a connection basis for overcurrent, overvoltage and undervoltage protection.

[0084] In terms of form, the first connection part 110 can be a copper foil connection area, a nickel sheet connection area, a nickel-plated copper sheet, a conductive pad on a flexible circuit board, or a metal terminal structure formed by integral stamping. It can also adopt a multi-layer composite conductive structure to improve current carrying capacity and connection reliability.

[0085] In other exemplary embodiments, the first connection portion 110 may also be composed of a stacked copper-clad structure, a busbar-type metal sheet, or a locally thickened conductive substrate area to adapt to the needs of different battery 10 capacity and current levels.

[0086] In terms of dimensions, the width of the first connecting portion 110 typically matches the width of the welding area of ​​the first tab 220 and the third tab 240, its length covers the relative distribution range of the two tabs on the circuit protection assembly 100, and its thickness is generally no more than half the local thickness of the circuit protection assembly 100 to avoid forming additional protrusions, thereby facilitating assembly in confined spaces. In some embodiments, the welding area of ​​the first connecting portion 110 can be designed according to the conduction current, welding heat-affected zone, and structural strength requirements, thereby reducing material usage while ensuring conductivity. It should be understood that the above examples are merely illustrative and not limiting.

[0087] It should be noted that the first tab 220 and the third tab 240 are respectively led out from the output terminals of the corresponding cells 210 and arranged towards the first connection portion 110. After the two tabs are spatially aligned with the first connection portion 110, they are fixed to the first connection portion 110 by welding, pressing, or conductive adhesive. This allows the main current paths from the two cells 210 to converge at the first connection portion 110 and further enter the protection and sampling circuit inside the circuit protection assembly 100. Since the first connection portion 110 is located at the convergence point of the two tabs, the current transmission path is more direct, reducing unnecessary crossings and detours, thereby reducing connection impedance and the risk of localized heating.

[0088] Furthermore, the first connecting portion 110 extends between two adjacent cells 210 to facilitate the connection between the first tab 220 of the first side 211 and the third tab 240 of the third side 213. The first connecting portion 110 forms a unified conductive bearing surface for the first tab 220 and the third tab 240, which helps improve assembly positioning accuracy and reduce welding interference and poor connection caused by tab deviation. As the battery 10 continues to operate during charging and discharging, the first connecting portion 110 continuously undertakes the functions of current convergence and signal transmission, enabling the circuit protection component 100 to implement corresponding protection control based on the electrical state of the two cells 210. This ensures connection stability while reducing the space occupied by the head and improving the compactness and space utilization of the battery 10 assembly within the limited installation cavity.

[0089] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In one possible implementation, the first side 211 is provided with a first clearance groove 2111, the third side 213 is provided with a second clearance groove 2131, the first electrode 220 is located in the first clearance groove 2111, and the third electrode 240 is located in the second clearance groove 2131.

[0090] In one possible embodiment of this application, the first clearance groove 2111 and the second clearance groove 2131 are both groove structures formed on the edge of the side wall of the corresponding cell 210, used to accommodate the corresponding tab and provide clearance space for the tab.

[0091] The first clearance groove 2111 is formed on the first side 211 of the first battery cell 2101, and the second clearance groove 2131 is formed on the third side 213 of the second battery cell 2102. The first clearance groove 2111 is used to accommodate the first tab 220, and the second clearance groove 2131 is used to accommodate the third tab 240, so that the corresponding tabs can be partially accommodated within the outline of the battery cell 210 after assembly, thereby reducing the protrusion height of the tabs and reducing interference between them and the external connection structure.

[0092] It should be noted that the first clearance groove 2111 and the second clearance groove 2131 can be rectangular, arc-shaped, trapezoidal, or stepped. Among them, rectangular grooves are easy to process and position, arc-shaped grooves help reduce stress concentration, trapezoidal grooves can take into account both guiding and anti-detachment effects, and stepped grooves are suitable for use with local folds or adhesive layers to form a step-by-step clearance.

[0093] The groove walls of the first clearance groove 2111 and the second clearance groove 2131 can be formed by the edge of the electrode stack, the aluminum-plastic film covering layer, the edge sealing of the insulating film, or the partial recessed structure of the outer shell. In different embodiments, they can also be defined by injection-molded insulating material, edge sealing adhesive layer, or the edge bending portion of the metal shell.

[0094] In terms of dimensions, the depths of the first clearance groove 2111 and the second clearance groove 2131 are typically matched to the thickness of the corresponding tab and the protruding height after flattening. The groove width can be slightly larger than the tab width to provide assembly allowance. A clearance fit is usually formed between the groove width and the tab width. The ratio of groove depth to tab protrusion height can be 1:1 to 1:1.2 to ensure stable insertion of the tab without increasing local thickness. If a more compact installation method is adopted, the first clearance groove 2111 and the second clearance groove 2131 can only partially accommodate the root of the tab, leaving necessary welding space at the top of the tab. It should be understood that the above examples are for illustrative purposes only and are not limiting.

[0095] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In one possible implementation, the first clearance groove 2111 is located at the junction of the first side 211 and the second side 212, and the second clearance groove 2131 is located at the junction of the third side 213 and the fourth side 214.

[0096] In one possible embodiment, the first clearance groove 2111 and the second clearance groove 2131 are both recessed structures disposed in the corner areas of the first battery cell 2101 and the second battery cell 2102, providing space for the arrangement and bending of the first tab 220 and the third tab 240. The function of the clearance groove structure is to allow the corresponding tabs to be arranged along the corner direction of the adjacent side of the battery cell 210, thereby avoiding the tabs occupying a large area on the side plane, and making the connection path of the circuit protection component 100 shorter and straighter, reducing the span length of the circuit protection component 100 in the head area of ​​the battery 10.

[0097] The first clearance groove 2111 is located at the connection between the first side 211 and the second side 212 of the first battery cell 2101, and the second clearance groove 2131 is located at the connection between the third side 213 and the fourth side 214 of the second battery cell 2102. During assembly, the above-mentioned arrangement can provide a partial accommodating and guiding position for the first tab 220, the second tab 230, the third tab 240, and the fourth tab 250, thereby making the welding points, bending points, and connection points of the tabs more concentrated and orderly.

[0098] In this application, the aforementioned connection typically corresponds to the edge sealing, folding, or side sealing transition area of ​​the battery cell 210. Specifically, it can be the heat-sealed folding area of ​​the aluminum-plastic film battery cell 210, the edge corner area of ​​the soft-pack battery cell 210, the corner transition area of ​​the metal shell battery cell 210, or the shell edge with local chamfers, rounded corners, or stepped transitions. The first clearance groove 2111 and / or the second clearance groove 2131 can be formed by locally pressing, cutting, molding, or reserving windows in this area to adapt to the outer contour of the corresponding electrode tab.

[0099] For example, the first clearance groove 2111 and / or the second clearance groove 2131 may be an arc-shaped groove, a rectangular groove, a U-shaped groove, or a notch structure with rounded corners. The groove wall may be a continuous and smooth transition surface, or a sloped transition structure that matches the sealing layer. Its material is usually consistent with or compatible with the packaging material of the battery cell 210 body, such as an aluminum-plastic film outer layer, a composite packaging film, a partial edge of a metal shell, a partial clearance part of an injection molded shell, or a partial recess of a sealing layer, so as to ensure that the overall sealing and structural strength of the battery cell 210 are not damaged.

[0100] In terms of dimensions, the opening width of the first clearance groove 2111 and / or the second clearance groove 2131 is typically slightly larger than the width of the corresponding tab. The groove depth can be set according to the thickness of the corresponding tab, the bending radius, and the stacking thickness of the circuit protection component 100, and is typically several times the thickness of the tab, so as to ensure the clearance effect while avoiding excessive weakening of the corner support strength. When a compact arrangement is required, the length of the first clearance groove 2111 and / or the second clearance groove 2131 can cover only the tab welding area and its necessary transition area, thereby controlling the impact on the effective area of ​​the cell 210 to a small extent. It should be understood that the above examples are for demonstration purposes only and are not limiting.

[0101] See Figure 1 , Figure 2 , Figure 3 and Figure 4 Based on the aforementioned embodiments, the first clearance groove 2111 and the second clearance groove 2131 are arranged facing each other to form a receiving groove 215, and at least a portion of the first connecting portion 110 extends into the receiving groove 215.

[0102] In this application, the receiving groove 215 is a partial receiving space formed by the first clearance groove 2111 and the second clearance groove 2131, which is used to accommodate the first connecting part 110 and the adjacent first electrode 220 and third electrode 240.

[0103] It should be noted that the first connecting part 110 in this embodiment refers to a conductive member used to realize the electrical connection and current conduction between the first tab 220 and the third tab 240. After at least part of it extends into the receiving groove 215, it can reduce the protrusion height of the first connecting part 110 in the head area of ​​the battery 10 while maintaining a stable connection with the first tab 220 and the third tab 240.

[0104] Based on the above structure, the first clearance groove 2111 is disposed on the edge of the first side 211 of the first battery cell 2101, and the second clearance groove 2131 is disposed on the edge of the third side 213 of the second battery cell 2102. When the first battery cell 2101 and the second battery cell 2102 are assembled close together along the first direction at a predetermined distance, the first clearance groove 2111 and the second clearance groove 2131 are positioned opposite each other and their openings face each other, thereby forming a receiving groove 215 between them to accommodate the first connecting part 110.

[0105] When the first connecting part 110 is inserted along the direction of the receiving groove 215, it can form a welding, pressing, or attaching electrical connection with the first tab 220 and the third tab 240 located in or near the groove opening, and be laterally limited by the groove wall. In order to balance assembly convenience and space compression effect, the lateral width of the receiving groove 215 is usually slightly larger than the width of the first connecting part 110, so that the first connecting part 110 can be smoothly inserted and obtain the necessary assembly tolerance. The depth of the receiving groove 215 can be set according to the thickness requirements of the battery head 10. The insertion depth of the first connecting part 110 can be one-third to the entire depth of the receiving groove 215, thereby reducing the stacking thickness of the battery 10 while meeting the welding operation space requirements.

[0106] In one possible embodiment, the first clearance groove 2111 and the second clearance groove 2131 can be formed by punching, die-cutting, hot pressing, or injection molding, with rounded or chamfered edges at the groove openings to reduce stress concentration. It should be understood that the above examples are merely illustrative and not limiting.

[0107] See Figure 1 , Figure 2 , Figure 3 and Figure 4 Based on the aforementioned embodiments, it further includes an injection molded part 300, which is disposed in the receiving groove 215 and covers the first connecting part 110, the first electrode 220 and the third electrode 240.

[0108] In one possible embodiment, the injection molded part 300 is a component disposed in the receiving groove 215 for insulating encapsulation and fixation. It is used to cover the first connecting part 110 and the first tab 220 and the third tab 240 electrically connected thereto, thereby providing mechanical restraint, insulation isolation and environmental protection for the conductive connection area without increasing the thickness of the battery 10.

[0109] Based on the above structure, the injection molded part 300 is located in the receiving groove 215 formed by the first clearance groove 2111 of the first battery cell 2101 and the second clearance groove 2131 of the second battery cell 2102 facing each other. The injection molded part 300 fills the gap between the first connecting part 110, the first electrode 220 and the third electrode 240 and the inner wall of the receiving groove 215, which can wrap and fix the exposed solder joints, conductive connection parts and metal parts.

[0110] With the above settings, the injection molded part 300 can restrict the degree of freedom of movement of the first connecting part 110, the first electrode 220 and the third electrode 240, prevent the solder joint from cracking due to vibration, and prevent the first connecting part 110 from contacting the surrounding battery cell 210 housing or metal parts, thereby avoiding the risk of short circuit.

[0111] For example, the injection molded part 300 can be formed by one-time injection molding, two-time overmolding, in-mold potting and curing, or post-application curing. Its shape can be a monolithic block overmolding, a partial potting compound, or an irregularly shaped overmolding that matches the contour of the receiving groove 215. The material can be one or more of the insulating polymer materials such as PA (Polyamide), PBT (Polybutylene Terephthalate), PP (Polypropylene), TPU (Thermoplastic Polyurethane), epoxy resin, silicone, or modified elastomer. Flame-retardant fillers, toughening agents, or heat-resistant reinforcing components can be added according to the requirements of heat resistance, flame retardancy, and cushioning to improve the adaptability to the working environment of the battery 10.

[0112] In terms of dimensions, the shape of the injection molded part 300 is generally adapted to the geometric boundaries of the receiving groove 215. Its covering thickness at least covers the exposed height of the first connecting part 110 and the first tab 220 and the third tab 240, and a certain insulation safety margin is reserved in the circumferential direction. Usually, its outer surface is roughly flush with or slightly lower than the outer surface of the cell 210 to avoid forming additional protrusions that would affect the installation of the battery 10 in the device cavity. It should be understood that the above example is only for demonstration and not a limitation.

[0113] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In one possible implementation, the circuit protection component 100 further includes a second connection portion 120 and a third connection portion 130, which are respectively disposed on both sides of the first connection portion 110 and connected to the second tab 230 and the fourth tab 250 respectively.

[0114] In one possible embodiment, the second connection portion 120 and the third connection portion 130 are both conductive connection structures on the circuit protection assembly 100 for receiving corresponding tabs. The second connection portion 120 is used to connect the second tab 230 of the first battery cell 2101, and the third connection portion 130 is used to connect the fourth tab 250 of the second battery cell 2102. The second connection portion 120 and the third connection portion 130 cooperate with the first connection portion 110 to enable the corresponding tabs on the two battery cells 210 to be connected to the circuit protection assembly 100 according to a predetermined electrical connection path, thereby realizing sampling, protection, conduction, and necessary bus connections.

[0115] In terms of position and relationship, the second connecting portion 120 and the third connecting portion 130 are disposed on both sides of the first connecting portion 110, and are respectively arranged in a one-to-one correspondence with the second tab 230 and the fourth tab 250. This layout disperses the connection points that originally needed to be concentrated on the same side of the cell 210 to both sides of the first connecting portion 110, so that the circuit protection component 100 does not need to span the entire head of the battery 10, thereby reducing the space occupied by the circuit protection component 100 in the length direction of the cell 210 and reducing the stacking thickness of the connection points.

[0116] In terms of form and material, the second connecting part 120 and the third connecting part 130 can be implemented in the form of metal welding sheet, stamped terminal, flexible wire pad, nickel-plated copper conductive sheet, aluminum foil connecting sheet or integrated busbar end. Among them, the metal welding sheet can be rectangular, the stamped terminal can have a bending transition section, the flexible wire pad can be integrally formed with the ribbon cable, the nickel-plated conductive sheet can improve the welding reliability, and the integrated busbar end can facilitate the formation of an integral connection structure with the first connecting part 110. In terms of material selection, copper, nickel-copper composite material, aluminum, nickel-plated steel or composite material with conductive coating can be used.

[0117] Regarding dimensions and proportions, the widths of the second connecting portion 120 and the third connecting portion 130 are typically matched to the welding width of the corresponding tabs. Their lengths can be adjusted according to the tab positions and the arrangement distance of the circuit protection components 100. Their thickness can be less than or equal to the thickness of the first connecting portion 110 to reduce the head stack thickness while ensuring current carrying capacity. The spacing between the first connecting portion 110, the second connecting portion 120, and the third connecting portion 130 should meet the requirements of the cell 210 tab spacing, welding equipment operating space, and insulation safety distance to avoid mutual interference and improve assembly tolerance. It should be understood that the above examples are for illustrative purposes only and are not limiting.

[0118] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In one possible implementation, the circuit protection component 100 includes a circuit board 140, the circuit board 140 and the battery cell 210 are arranged at intervals along a second direction, the second connection portion 120 and the third connection portion 130 are both disposed on the same side of the circuit board 140 away from or close to the battery cell 210, the thickness direction of the circuit board 140 is parallel to the second direction, and the second direction is perpendicular to the first direction.

[0119] In this application, the circuit board 140 is a substrate structure for carrying protection circuit elements, connection terminals and sampling lines. Its main function is to provide an electrical wiring platform for the overcurrent, overvoltage, undervoltage and short circuit protection of the battery 10, and to establish a stable electrical connection path between each connection part (i.e. the first connection part 110, the second connection part 120 and the third connection part 130) and the corresponding electrode tab.

[0120] In one possible embodiment, the circuit board 140 and the battery cell 210 are spaced apart along the second direction. The circuit board 140 is not directly attached to the surface of the battery cell 210, but is arranged in a spatial layered manner through the reserved installation gap, so that the protection circuit and the battery cell 210 body are misaligned in the thickness direction, avoiding interference between the components 150, solder joints or traces and the battery cell 210 housing and tab area.

[0121] Furthermore, both the second connecting portion 120 and the third connecting portion 130 are located on the same side of the circuit board 140, either away from or close to the battery cell 210. Concentrating the second connecting portion 120 and the third connecting portion 130 on the same side of the circuit board 140 achieves the following advantages: First, it facilitates the completion of welding operations between the second connecting portion 120 and the second tab 230, and between the third connecting portion 130 and the fourth tab 250, by welding fixtures or automated equipment in a single operation, effectively reducing production steps and improving assembly efficiency; Second, it avoids the second connecting portion 120 and the third connecting portion 130 spanning both sides of the circuit board 140, thereby reducing the number of vias and double-sided wiring on the circuit board 140. The number of layers simplifies the internal conductive structure of the circuit board 140, reducing the difficulty of the process and the manufacturing cost; third, since the second connecting part 120 and the third connecting part 130 are arranged on the same side, they can be bent toward the side of the cell 210 after being welded to the corresponding electrode tab, so that the outer surface of the second connecting part 120 and the third connecting part 130 after bending can be flush with or lower than the outer surface of the cell 210, thus not increasing the overall thickness of the circuit protection component 100, thereby achieving further compression of the head space of the battery 10.

[0122] In terms of form, circuit board 140 can be a rigid printed circuit board, a flexible printed circuit board, a rigid-flex board, or a high-density interconnect board. Rigid printed circuit boards can use FR-4 glass fiber epoxy substrate, flexible printed circuit boards can use PI (Polyimide) or PET (Polyethylene Terephthalate) substrates, rigid-flex boards can balance assembly adaptability between localized rigid load-bearing and localized flexible transitions, and high-density interconnect boards are suitable for deploying more protective components and sampling lines within a smaller area. The conductor layers on circuit board 140 can use copper foil, nickel-plated copper foil, or multilayer stacked conductors to meet current carrying capacity and soldering reliability requirements.

[0123] It should be noted that the thickness direction of circuit board 140 is parallel to the second direction, indicating that the extension direction of circuit board 140 roughly corresponds to the arrangement direction of battery cells 210 (i.e., the first direction). The specific thickness of circuit board 140 can be selected based on component height, insulation requirements, and assembly clearances; the length and width of circuit board 140 can be arranged according to the available space in the head area of ​​battery 10. The spacing between circuit board 140 and battery cells 210 generally needs to be sufficient to accommodate the heat-affected zone of welding, local bending compensation, and the thickness of the insulation coating layer, and can usually be set according to the overall space constraints. It should be understood that the above example is for illustrative purposes only and is not limiting.

[0124] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 Based on the aforementioned embodiments, the first connecting portion 110 is further disposed on the side of the circuit board 140 close to the battery cell 210, and the second connecting portion 120 and the third connecting portion 130 are both disposed on the side of the circuit board 140 away from the battery cell 210.

[0125] In this application, the first connection part 110 is a conductive connection structure disposed on the side of the circuit board 140 facing the battery cell 210, for forming an electrical connection with the first tab 220 and the third tab 240, and the second connection part 120 and the third connection part 130 are conductive connection structures disposed on the side of the circuit board 140 facing away from the battery cell 210, respectively corresponding to and cooperating with the second tab 230 and the fourth tab 250.

[0126] By arranging the first connection portion 110 on the side closer to the battery cell 210, and arranging the second connection portion 120 and the third connection portion 130 on the side farther from the battery cell 210, a front-and-back layered wiring structure can be formed on the circuit board 140 in the thickness direction. This layered layout breaks the limitation of traditional protection boards that concentrate all connection points on one side of the circuit board 140, thereby compressing the space occupied by the circuit protection component 100 in the length direction of the battery cell 210, which helps to achieve miniaturization and thinning of the circuit protection component 100.

[0127] The first connecting part 110 is used to receive the main current terminal that needs to be connected nearby, which makes it easier to shorten the lead distance between the first tab 220 and the third tab 240; the second connecting part 120 and the third connecting part 130 can be used to connect the second tab 230 and the fourth tab 250 respectively, so that the electrical connection path is distributed on different surfaces of the circuit board 140, thereby reducing the congestion on one side of the circuit board 140 and reserving a more sufficient assembly gap between the battery cell 210 and the circuit protection component 100.

[0128] In one possible embodiment, the first connection portion 110, the second connection portion 120, and the third connection portion 130 can be solder pads, terminal pieces, conductive copper foil, or copper-clad areas, respectively, and can be disposed on a rigid board, a flexible board, or a rigid-flexible composite board according to the type of the circuit board 140. When the circuit board 140 adopts a multilayer structure, the first connection portion 110 and the second connection portion 120 and the third connection portion 130 can be electrically connected through vias, blind vias, or cross-layer traces to ensure the reliability of the conduction between each connection portion and the internal circuit.

[0129] Furthermore, when the first connecting part 110 is located on the side closer to the battery cell 210, its welding area can usually be designed to be relatively large in order to improve the welding strength and tolerance absorption capacity. When the second connecting part 120 and the third connecting part 130 are located on the side farther away from the battery cell 210, they can be appropriately compressed in combination with the layout of the components 150 and the housing limit situation to reduce the shape occupation.

[0130] Generally, the distance between the first connecting part 110 and the battery cell 210 must meet the insulation safety requirements and avoid compression with the corresponding electrode tab. The arrangement height and lateral spacing between the second connecting part 120 and the third connecting part 130 should take into account both the accessibility of soldering tools and the stability of conductive connection. The specific dimensions can be adjusted according to different battery cell 210 specifications and circuit board 140 thickness. For example, the width, length and adjacent spacing of its solder pads can be set to a range of several millimeters to more than ten millimeters. It should be understood that the above examples are for demonstration purposes only and are not limiting.

[0131] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 Based on the aforementioned embodiments, the circuit board 140 further includes a flat portion 1401 and at least one bent portion 1402. The first connecting portion 110, the second connecting portion 120 and the third connecting portion 130 are all disposed on the flat portion 1401, and the bent portion 1402 is connected to the flat portion 1401.

[0132] In one possible embodiment, the flat section 1401 is a straight structure on the circuit board 140 used to support the three main soldering terminals—the first connecting section 110, the second connecting section 120, and the third connecting section 130—and to provide protective circuit traces. The function of the flat section 1401 is to provide a unified mounting and soldering reference for the aforementioned connecting sections, enabling the first tab 220, the second tab 230, the third tab 240, and the fourth tab 250 to be smoothly electrically connected to the circuit board 140, thereby simplifying the assembly process and ensuring connection accuracy.

[0133] The bending portion 1402 is a connection transition structure that bends relative to the flat portion 1401 to change the spatial orientation of the circuit board 140. Its function is to change the extension direction of the circuit board 140 by bending, thereby further reducing the transverse length of the circuit protection component 100 in the first direction.

[0134] Specifically, by bending and folding a portion of the structure on the circuit board 140 to form a bent portion 1402, the unused depth space inside the battery 10 in the second direction can be effectively utilized, avoiding the circuit board 140 from being laid flat over a large area at the head of the battery 10 along the first direction, thereby saving the space occupied inside the battery 10 in the first direction, thus providing more extension space for the cell 210 to increase its capacity.

[0135] In terms of position, the flat portion 1401 is located on the side close to the tab of the battery cell 210 and is arranged roughly parallel to the battery cell 210. The bent portion 1402 extends from the edge, end or middle of the flat portion 1401 to form a bend, so as to accommodate the space avoidance requirements of the battery cell assembly 200, injection molded part 300, connection terminal or other accessories.

[0136] In terms of form and material, the circuit board 140 can be formed by using a flexible PI substrate to form an integrated structure of the flat part 1401 and the bent part 1402, or it can be formed by using a rigid-flexible combined board to form a local rigid load-bearing area and a bendable transition area, or it can be formed by using a thin FR-4 locally thinned board or a composite metal substrate to meet the balance between strength and bendability.

[0137] The bending section 1402 can be arranged in an L-shape by a single bend, in a U-shape by a double bend, or in a zigzag shape by multiple bends. The bending section 1402 and the flat section 1401 can be connected by a continuous copper foil transition area, a window buffer zone, or a thinning transition area to reduce stress concentration during bending.

[0138] In terms of size and proportion, the length and width of the flat portion 1401 are typically greater than the local transition length of the bent portion 1402. The width of the flat portion 1401 can be set according to the tab spacing, pad size, and protection device arrangement requirements. The width of the bent portion 1402 is typically less than or equal to the local width of the flat portion 1401 to avoid adjacent structures after bending. The bending radius of the bent portion 1402 must meet the minimum bending radius requirements of the material, generally several to more than ten times the board thickness, to avoid copper foil cracking, substrate delamination, or poor conductivity. It should be understood that the above examples are for illustrative purposes only and are not limiting.

[0139] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In one possible implementation, the circuit protection assembly 100 further includes a component 150 disposed at the end of the bend 1402 away from the flat portion 1401.

[0140] In one possible embodiment, component 150 refers to an electronic device disposed on circuit board 140 for performing one or more functions of battery 10 voltage detection, current on / off control, temperature monitoring and overcharge / overdischarge protection.

[0141] It should be understood that if component 150 is placed in the flat portion 1401, it will not only encroach on the placement space of the first tab 220 and the fourth tab 250, but also increase the necessary length of the flat portion 1401 in the first direction. However, placing component 150 at the end of the bent portion 1402 away from the flat portion 1401 helps to further reduce the surface space of the flat portion 1401, so that the flat portion 1401 does not need to extend its own length to accommodate component 150. In other words, the flat portion 1401 only needs to meet the minimum requirements for tab welding and circuit wiring, thereby reducing the overall length occupied by the circuit protection assembly 100 in the cell 210 arrangement direction and optimizing the spatial layout of the head region of the battery 10.

[0142] In addition, component 150 is typically electrically connected to circuit board 140 via solder pads and can be fixed to the surface of circuit board 140 by means of reflow soldering, wave soldering, or spot soldering. Its working interface is connected to the main protection circuit and sampling circuit inside circuit board 140 to realize real-time control of the working state of battery 10. It can be understood that because the bending portion 1402 changes the spatial orientation of circuit board 140, the soldering areas of component 150 and the flat portion 1401 used to connect the first tab 220, the second tab 230, the third tab 240, and the fourth tab 250 are physically offset from each other, thereby effectively reducing the local stacking density and avoiding interference between component 150 and the tab solder joints.

[0143] It should be noted that the specific form of component 150 can be a surface-mount MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), a protection IC (Integrated Circuit), a sampling resistor, a capacitor, or a thermistor; its package form can be QFN (Quad Flat No-leads), SOP (Small Outline Package), DFN (Dual Flat No-leads), or LGA (Land Grid Array).

[0144] Regarding the dimensional arrangement, the height of component 150 is typically limited by the internal stacking thickness of the battery 10 casing. Its mounting height should meet the safety clearance requirements between it and the top cover, insulating components, and adjacent structural components. In some embodiments, the length and width of component 150 can be adapted according to the battery 10 capacity and the number of protection functions, and sufficient soldering allowance and heat dissipation space should be maintained between it and the edge of the bent portion 1402 to prevent heat accumulation. It should be understood that the above examples are merely illustrative and not limiting.

[0145] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 Based on the aforementioned embodiments, the bending portion 1402 further includes a first extension portion 14021 and a second extension portion 14022. The second extension portion 14022 is connected to the flat portion 1401 through the first extension portion 14021. The extension directions of the first extension portion 14021 and the second extension portion 14022 are set at an angle.

[0146] In one possible embodiment, the first extension 14021 and the second extension 14022 respectively constitute a segmented steering structure on the circuit board 140. The first extension 14021 is a transition section structure connecting the flat section 1401 and the second extension 14022, and the second extension 14022 is a connecting section that continues to extend outward from the first extension 14021.

[0147] Understandably, the two-section structure of the bending portion 1402 is primarily designed to accommodate the assembly process of the electronic device. The angle between the first extension 14021 and the second extension 14022 allows for changing the rotatable direction of the second extension 14022.

[0148] In this embodiment, the extension direction of the first extension 14021 is parallel to the first direction, and the extension direction of the second extension 14022 is perpendicular to the extension direction of the first extension 14021, allowing the second extension 14022 to be bent along the second direction. This arrangement facilitates the alignment and engagement of the second extension 14022 with the motherboard of the relevant device during assembly of the circuit protection assembly 100, thereby reducing the overall assembly difficulty and improving assembly efficiency.

[0149] In terms of position, one end of the first extension 14021 is connected to the flat section 1401, and the other end of the first extension 14021 is connected to the second extension 14022. The flat section 1401 is used to perform the installation or soldering functions of the first connecting section 110, the second connecting section 120, and the third connecting section 130, while the end of the second extension 14022 away from the flat section 1401 is used to connect to the electronic device motherboard or external load interface.

[0150] In terms of form and material, the first extension 14021 and the second extension 14022 can adopt a straight segment bending structure or an arc bending structure with rounded corners; in terms of material, it can be a flexible printed circuit board 140 substrate, a partially thinned rigid copper-clad laminate or a rigid-flexible composite board to ensure deformation reliability under repeated assembly or long-term working conditions.

[0151] Furthermore, regarding dimensions and proportions, the lengths of the first extension 14021 and the second extension 14022 can be set according to the overall cavity dimensions of the relevant equipment. The included angle between them can be set as an acute angle, a right angle, or an obtuse angle according to the assembly path, typically determined in conjunction with the plate thickness, bending radius, and copper foil strain limit, to prevent significant warping, cracking, or wire damage after bending. It should be understood that the above dimensions, shapes, and materials are merely illustrative and not limiting, and can be adjusted accordingly under different battery capacities, different equipment thicknesses, and different assembly tolerances.

[0152] See Figure 1, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 Based on the aforementioned embodiments, the circuit protection component 100 further includes a protection module 160, which and the first connection portion 110 are respectively disposed on both sides of the circuit board 140.

[0153] In one possible embodiment, the protection module 160 is the core control unit of the circuit protection component 100. It may include electronic components such as a protection IC, a MOSFET array, a sampling resistor, and a filter capacitor, and is used to perform charge and discharge management of the battery cell 210, voltage and current sampling, and overcurrent and overvoltage protection. The first connection part 110 is a conductive structure used to establish an electrical connection with the first tab 220 and the third tab 240.

[0154] In another possible embodiment, the protection module 160 is disposed on the side of the circuit board 140 away from the battery cell 210. On the one hand, this arrangement can use the substrate of the circuit board 140 to isolate the high temperature during high current soldering on the side of the battery cell 210, preventing the protection IC and MOSFET from failing due to thermal shock. On the other hand, placing the MOSFET with greater heat generation towards the side away from the battery cell 210 can facilitate heat dissipation and avoid heat accumulation affecting the safety of the battery cell 210.

[0155] In addition, the first connection part 110 is disposed on the surface of the circuit board 140 near the battery cell 210, which can shorten the connection path between the first connection part 110 and the first tab 220 and the third tab 240, and reduce the conduction impedance.

[0156] During operation, when the battery 10 is in a charging or discharging state, the protection module 160 continuously collects and judges the voltage, current and temperature signals of the cell 210 corresponding to the first tab 220 and the third tab 240, and drives the internal power device to complete disconnection or current limiting control when an abnormal operating condition is detected.

[0157] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 This application provides an electrical device 1, which includes the battery 10 described above.

[0158] It should be noted that the electrical device 1 is a terminal or electronic device equipped with the aforementioned battery 10, which integrates the battery 10 as an internal power unit inside the device housing to provide power for the device's communication, display, calculation, sensing or other electrical functions.

[0159] In terms of physical location, the battery 10 is usually installed inside the housing of the electrical device 1, in the vicinity of the mainboard 20 and functional modules.

[0160] Based on the aforementioned structure of the battery 10, two adjacent cells 210 are arranged at intervals along a first direction, with the first side 211 and the third side 213 facing each other. The circuit protection assembly 100 is located above the second side 212 and the fourth side 214, and spans across the second tab 230 and the fourth tab 250 near the side of the circuit protection assembly 100. Part of the circuit protection assembly 100 extends between the two cells 210 to facilitate the connection of the first tab 220 and the third tab 240. This layout changes the traditional method of a protection plate spanning the head of the battery 10 to connect tabs on the same side, effectively reducing the space occupied by the head of the battery 10. Simultaneously, since the first tab 220 and the third tab 240 are respectively located on the sides of the cells 210, large-angle folding of the side seals of the cells 210 to form protrusions is avoided, thereby reducing the thickness of the head of the battery 10. Combined with the layered arrangement of the circuit protection assembly 100 and the cells 210, the saved space can be used to increase the length of the cells 210 themselves, thereby increasing the capacity of the battery 10. In addition, by placing the tabs of the same cell 210 on adjacent sides, the distance between the tabs on the same side is avoided to be too close, thus improving the safety of electrical connection.

[0161] In terms of assembly, the battery 10 is housed inside the casing of the electrical device 1. Due to the compact structure of the battery 10, reasonable assembly allowances can be reserved for other functional components inside the casing (such as the mainboard 20, interface components, etc.) even when the internal space of the casing is limited.

[0162] During operation, the battery 10 outputs current to the mainboard 20 through the circuit protection component 100 to drive the electrical equipment 1, and performs overcharge and overcurrent protection during charging. Its dispersed and short straight tab connection path effectively reduces the risk of assembly interference and improves the stability of electrical connection.

[0163] It should be understood that the aforementioned electrical device 1 can be an electronic product with high requirements for size and battery life, such as a smartphone, tablet, wearable device, portable computing terminal, or handheld terminal, and the battery 10 can be used as a built-in fixed power supply or a detachable modular power supply. The above examples are for illustrative purposes only and are not limiting.

[0164] See Figure 1 , Figure 2 , Figure 3, Figure 4 and Figure 9 In one possible implementation, the electrical device 1 also includes a main board 20, and the main board 20 and / or the battery cell assembly 200 of the battery 10 are provided with a receiving slot 201 for receiving the circuit protection assembly 100 of the battery 10.

[0165] In one possible embodiment, the mainboard 20 is the core circuit board that carries the electronic functional modules of the electrical device 1, and the receiving groove 201 is a partial groove provided on the mainboard 20 for forming an embedded receiving fit with the circuit protection component 100 of the battery 10.

[0166] The circuit protection component 100 typically includes a MOSFET, a control IC, a sampling resistor, a capacitor, and connecting nickel strips, and is used to perform charge and discharge management and safety protection of the battery 10.

[0167] Since the circuit protection component 100 has a certain thickness and structural dimensions, and the circuit protection component 100 and the battery cell 210 of the battery 10 are arranged along the second direction, the circuit protection component 100 will limit the upper limit of the extension of the battery cell 210 in the second direction. By opening a receiving groove 201 on the main board 20, the circuit protection component 100 protruding from the surface of the battery 10 is at least partially inserted into the receiving groove 201.

[0168] It should be understood that, within the housing of the electrical device 1, while maintaining the overall dimensions of its installation space, the installation height that would have been reserved for the circuit protection component 100 is saved, allowing the battery cell 210 of the battery 10 to extend further along the second direction. By increasing the effective length of the cell 210 in this direction, the internal volume of the cell 210 is directly increased, thereby improving the capacity of the battery 10.

[0169] In terms of position, the receiving groove 201 is usually located on the edge of the motherboard 20 near the battery 10 mounting area. Its depth is set according to the maximum thickness of the circuit protection component 100, and is usually greater than or equal to the protrusion height of the circuit protection component 100, so as to ensure that the circuit protection component 100 is completely submerged in the receiving groove 201 and to avoid interference between the circuit protection component 100 and the surface of the motherboard 20.

[0170] Furthermore, the planar contour of the receiving slot 201 matches the external dimensions of the circuit protection assembly 100, with assembly tolerances provided. After the circuit protection assembly 100 is embedded in the receiving slot 201, it can achieve electrical signal communication with the mainboard 20 of the entire machine through soldering or connectors. It should be understood that the above example is only illustrative and not limiting.

[0171] See Figure 1 and Figure 9In one possible implementation, the receiving groove 201 may also be a partial recess provided on the cell assembly 200 for forming an embedded receiving fit with the circuit protection assembly 100 of the battery 10.

[0172] In this configuration, for two adjacent battery cells 210, the second side 212 of the first battery cell 2101 has a third clearance groove 2121, and the fourth side 214 of the second battery cell 2102 has a fourth clearance groove 2141. The third clearance groove 2121 and the fourth clearance groove 2141 are arranged facing each other along a first direction to form a receiving groove 201. At least a portion of the structure of the circuit protection assembly 100 extends into the receiving groove 201, thereby directly utilizing a portion of the structure of the battery cell assembly 200 to form the receiving groove 201, thus offsetting the stacked thickness of the circuit protection assembly 100.

[0173] With the above configuration, compared to the prior art where the protection board is laid flat in the head region of the battery 10, resulting in the compression of the length of the cell 210, this embodiment assembles the circuit protection component 100 in the receiving groove 201 on the cell assembly 200. Under the premise that the total size of the installation space inside the electrical device 1 remains unchanged, the cell 210 can be further extended along the second direction to increase its effective length, thereby expanding the internal volume of the cell 210 and increasing the capacity of the battery 10.

[0174] Furthermore, the third clearance groove 2121 is connected to the first clearance groove 2111 on the first side 211, and the fourth clearance groove 2141 is connected to the second clearance groove 2131 on the third side 213. Through the above arrangement, not only is a continuous accommodating space formed on the cell 210, but the bending area of ​​the corresponding electrode tab is also effectively avoided, thereby improving the space utilization rate.

[0175] In another possible embodiment, the receiving slot 201 may also be defined by the battery cell assembly 200 and the mainboard 20.

[0176] Specifically, a groove is provided on one side of the cell assembly 200, and correspondingly, a notch is provided on one side of the main board 20. After the groove and the notch are aligned and assembled, they together form a receiving groove 201 for accommodating the circuit protection assembly 100. Under the premise that the total size of the installation space in the electrical equipment 1 remains unchanged, the above-mentioned arrangement allows the cell 210 to extend further along the second direction to increase its effective length, thereby directly expanding the internal volume of the cell 210 and increasing the capacity of the battery 10.

[0177] The embodiments or implementation methods in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0178] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0179] In the description of this application, it should be understood that the terms “comprising” and “having” as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, display structure, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are expressly listed, but may include other steps or units that are not expressly listed or that are inherent to such process, method, product, or device.

[0180] The term "and / or" used in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0181] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0182] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery, characterized in that, include: Circuit protection components (100); A battery cell assembly (200) includes at least two battery cells (210), which are spaced apart along a first direction. In two adjacent battery cells (210), one battery cell (210) has a first side (211) and a second side (212) arranged adjacently, and the other battery cell (210) has a third side (213) and a fourth side (214) arranged adjacently. The first side (211) and the third side (213) are arranged facing each other along the first direction. The first side (211) has a first tab (220), the second side (212) has a second tab (230), the third side (213) has a third tab (240), and the fourth side (214) has a fourth tab (250). The circuit protection assembly (100) is located on the second side (212) and the fourth side (214) and extends partially between two adjacent cells (210). The first tab (220), the second tab (230), the third tab (240) and the fourth tab (250) are respectively connected to the circuit protection assembly (100).

2. The battery according to claim 1, characterized in that, The circuit protection assembly (100) includes a first connection portion (110) that extends between two adjacent cells (210), and a first tab (220) and a third tab (240) are respectively connected to the first connection portion (110).

3. The battery according to claim 2, characterized in that, The first side (211) is provided with a first clearance groove (2111), the third side (213) is provided with a second clearance groove (2131), the first electrode (220) is located in the first clearance groove (2111), and the third electrode (240) is located in the second clearance groove (2131).

4. The battery according to claim 3, characterized in that, The first clearance groove (2111) is located at the connection between the first side (211) and the second side (212), and the second clearance groove (2131) is located at the connection between the third side (213) and the fourth side (214).

5. The battery according to claim 3, characterized in that, The first clearance groove (2111) and the second clearance groove (2131) are arranged facing each other to form a receiving groove (215), and at least a portion of the first connecting portion (110) extends into the receiving groove (215).

6. The battery according to claim 5, characterized in that, It also includes an injection molded part (300), which is disposed in the receiving groove (215) and covers the first connecting part (110), the first electrode (220) and the third electrode (240).

7. The battery according to claim 2, characterized in that, The circuit protection assembly (100) further includes a second connection part (120) and a third connection part (130). The second connection part (120) and the third connection part (130) are respectively disposed on both sides of the first connection part (110) and are respectively connected to the second electrode (230) and the fourth electrode (250).

8. The battery according to claim 7, characterized in that, The circuit protection assembly (100) includes a circuit board (140), the circuit board (140) and the battery cell (210) are arranged at intervals along a second direction, the second connection part (120) and the third connection part (130) are both disposed on the same side of the circuit board (140) away from or close to the battery cell (210), the thickness direction of the circuit board (140) is parallel to the second direction, and the second direction is perpendicular to the first direction.

9. The battery according to claim 8, characterized in that, The first connecting part (110) is disposed on the side of the circuit board (140) close to the battery cell (210), and the second connecting part (120) and the third connecting part (130) are both disposed on the side of the circuit board (140) away from the battery cell (210).

10. The battery according to claim 8, characterized in that, The circuit board (140) includes a flat portion (1401) and at least one bent portion (1402), the first connecting portion (110), the second connecting portion (120) and the third connecting portion (130) are all disposed on the flat portion (1401), and the bent portion (1402) is connected to the flat portion (1401).

11. The battery according to claim 10, characterized in that, The circuit protection assembly (100) further includes a protection module (160), which and the first connection part (110) are respectively disposed on both sides of the circuit board (140).

12. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1-11.

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