A battery and an electric device

Abstract

The embodiment of the utility model provides a kind of battery and electric equipment, it is related to injection molding battery technical field.The battery includes electric core and PCM component, electric core has tab;PCM component includes PCM board, conducting body and injection molding protective part, PCM board is set to the upper end surface of electric core, tab and PCM board are connected by conducting body, injection molding protective part covers PCM board and part conducting body;Part of conducting body is exposed to injection molding protective part, and forms exposed part.Exposed part is used to connect external equipment by setting conducting body, which can facilitate external structure connection.In addition, first connect PCM board with conducting body, then injection molding forms injection molding protective part, so that injection molding protective part covers PCM board and part conducting body.And by setting injection molding protective part, after installing PCM component, it is not necessary to injection molding again, which can protect electric core from corrosion or prevent liquid leakage.

Description

Technical Field

[0001] This utility model relates to the field of injection-molded battery technology, and more specifically, to a battery and electrical equipment. Background Technology

[0002] As mobile phone functions become increasingly sophisticated, the required battery capacity is also growing. The space available for finished batteries within mobile phones is shrinking. Since the thickness of the battery assembly space is relatively fixed, current battery designs require significant stacking space in the length direction. To reduce the length dimension of the battery, the process of vertically placing the top-sealed protection plate (PCM) of the battery cell and injection molding it is gradually becoming the main solution for customers to increase battery capacity. In existing technologies, the PCM is typically directly assembled with the battery cell before overall injection molding.

[0003] However, after the battery cell is connected to the PCM and then injection molded, the injection molding compound can easily damage the battery cell, causing it to fail and affecting the quality of the battery. Utility Model Content

[0004] This utility model provides a battery and electrical device that can be easily connected to external structures without the need for injection molding, thereby protecting the battery cell from damage caused by external pressure.

[0005] The embodiments of this utility model can be implemented as follows: An embodiment of this utility model provides a battery comprising: At least one battery cell, the battery cell having tabs; The PCM assembly includes a PCM board, a conductive element, and an injection-molded protective element. The PCM board is disposed on the upper end face of the battery cell. The tabs and the PCM board are connected through the conductive element. The injection-molded protective element covers the PCM board and part of the conductive element. Part of the conductive element is exposed outside the injection-molded protective element, forming an exposed portion.

[0006] In an optional embodiment, the conductive component includes a flexible circuit board and a conductive metal component, the conductive metal component being embedded in the injection-molded protective component, with a portion exposed to form a welding area; the electrode tab is welded and fixed to the welding area. The flexible circuit board is connected to the conductive metal component, and a portion of the flexible circuit board is exposed outside the injection-molded protective component, forming an exposed portion. In an optional embodiment, there are multiple battery cells arranged side by side and fixedly connected; there are also multiple conductive metal components, each corresponding to at least one electrode tab.

[0007] In an optional embodiment, the battery further includes an insulating adhesive layer disposed in the welding area.

[0008] In an optional embodiment, the battery further includes insulating tape that covers the insulating adhesive layer and the injection-molded protective component.

[0009] In an optional embodiment, the conductive element is disposed on the side of the PCM board away from the upper end face of the battery cell, the flexible circuit board extends along the side of the battery cell, and a portion of the flexible circuit board extends out of the battery cell to form an exposed portion.

[0010] In an optional implementation, the flexible circuit board is L-shaped.

[0011] In an optional embodiment, the flexible circuit board has multiple vias.

[0012] In an optional implementation, a plurality of the via arrays are arranged.

[0013] In an optional embodiment, the flexible circuit board has multiple positioning holes on its sidewalls.

[0014] In an optional embodiment, a connector is provided at the end of the flexible circuit board away from the battery cell.

[0015] An embodiment of this utility model also provides an electrical device, including the battery described in any of the above embodiments.

[0016] The beneficial effects of the battery and electrical equipment according to the embodiments of this utility model include, for example: The battery includes a PCM assembly and at least one cell, each cell having tabs. The PCM assembly includes a PCM plate, conductive elements, and an injection-molded protective element. The PCM plate is positioned on the upper surface of the cell, and the tabs and PCM plate are connected via the conductive elements. The injection-molded protective element covers the PCM plate and part of the conductive elements; a portion of the conductive elements is exposed beyond the injection-molded protective element, forming an exposed portion. The presence of conductive elements facilitates connection to external structures, and the exposed portion serves both as a connection point for external devices and provides some heat dissipation. Furthermore, the PCM plate is first connected to the conductive elements, and then injection molding is performed to form the injection-molded protective element, which covers the PCM plate and part of the conductive elements. The protective layer formed by the injection-molded protective element effectively resists mechanical vibration, moisture, dust, etc., extending the battery's lifespan. Moreover, by using the injection-molded protective element, after the PCM assembly is installed, no further injection molding is required, protecting the cell from damage caused by external pressure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the battery provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the battery explosion provided in an embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of the battery provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the conductor provided in an embodiment of the present invention.

[0019] Icons: 1000 - Battery; 100 - Cell; 110 - Tab; 200 - PCM assembly; 210 - PCM board; 220 - Conductive component; 221 - Flexible circuit board; 2211 - Exposed part; 2212 - Via; 2213 - Positioning hole; 2214 - Connector; 222 - Conductive metal component; 230 - Injection molded protective component; 300 - Insulating adhesive layer; 400 - Insulating tape. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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 utility model.

[0024] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] As mobile phone functions become increasingly sophisticated, the required battery capacity is also growing. The space available for finished batteries within mobile phones is shrinking. Since the thickness of the battery assembly space is relatively fixed, current battery designs require significant stacking space in the length direction. To reduce the length dimension of the battery, the process of vertically placing the top-sealed protection plate (PCM) of the battery cell and injection molding it has gradually become a major solution for customers to increase battery capacity. In existing technologies, the PCM is usually directly assembled with the battery cell before overall injection molding. However, injection molding after the battery cell and PCM are connected can easily damage the battery cell, leading to cell failure and affecting battery quality.

[0027] Based on this, please refer to Figure 1 and Figure 2 The battery 1000 provided in the embodiments of this utility model effectively solves the aforementioned technical problems. This battery 1000 allows for easy connection to external structures without the need for injection molding, thereby protecting the battery cell 100 from damage caused by external pressure. This battery 1000 is used in mobile phones and other electrical devices; all electrical devices using this battery 1000 have the same functions as described above, and will not be elaborated further here.

[0028] The electrical device provided in the embodiments of this utility model includes a device body and a battery 1000. The battery 1000 is disposed within the device body, providing electrical energy to the device body to realize various functions of the device. The electronic device here can be a mobile phone, tablet, computer, or other devices, and is not limited thereto.

[0029] Figure 1 This is a schematic diagram of the battery 1000 provided in an embodiment of the present invention; Figure 2 This is an exploded schematic diagram of the battery 1000 provided in an embodiment of this utility model. Please refer to [link / reference]. Figure 1 and Figure 2In this embodiment, the battery 1000 includes a PCM assembly 200 and at least one battery cell 100, with the battery cell 100 having tabs 110. The PCM assembly 200 includes a PCM plate 210, a conductive element 220, and an injection-molded protective element 230. The PCM plate 210 is disposed on the upper end face of the battery cell 100, and the tabs 110 and the PCM plate 210 are connected by the conductive element 220. The injection-molded protective element 230 covers the PCM plate 210 and part of the conductive element 220. Part of the conductive element 220 is exposed outside the injection-molded protective element 230, forming an exposed portion 2211. By providing a conductor, it is easy to connect to external structures. The exposed portion 2211 is used to connect external devices and also has a certain heat dissipation effect. Furthermore, the PCM plate 210 is first connected to the conductor, and then injection molding is performed to form the injection-molded protective element 230, so that the injection-molded protective element 230 covers the PCM plate 210 and part of the conductor. The protective layer formed by the injection-molded protective component 230 can effectively resist mechanical vibration, moisture, dust, etc., and extend the service life of the battery 1000. Moreover, by setting the injection-molded protective component 230, after the PCM component 200 is installed, there is no need to perform injection molding again, which can protect the battery cell 100 from corrosion or prevent leakage.

[0030] Specifically, before assembling the PCM board 210 with the battery cell 100, it is first encapsulated with an injection-molded protective component 230 to prevent damage to the battery cell 100 caused by simultaneous injection molding along with the PCM board 210. Optionally, during the process of injection molding the protective component 230 after connecting the PCM board 210 to the conductor, panel injection molding can be used to improve production efficiency.

[0031] Please continue to refer to 1 and 2 Figure 2 In this embodiment, the conductive component 220 includes a flexible circuit board 221 and a conductive metal component 222. The conductive metal component 222 is embedded in the injection-molded protective component 230, and a portion of it is exposed to form a welding area. The electrode tab 110 is welded and fixed to the welding area. The flexible circuit board 221 is connected to the conductive metal component 222, and a portion of the flexible circuit board 221 is exposed outside the injection-molded protective component 230, forming an exposed portion 2211. By setting the conductive metal component 222 to be exposed to form a welding area, it is convenient to weld the conductive metal component 222 to the electrode tab 110 after the injection-molded protective component 230 is formed. The flexible circuit board 221 is used to connect to electrical equipment, so that the electrical energy of the battery cell 100 can supply power to the electrical equipment.

[0032] To increase the battery capacity and enhance power output, this embodiment uses multiple battery cells 100 arranged side-by-side and fixedly connected. It also uses multiple conductive metal parts 222, each corresponding to at least one tab 110. In this embodiment, the conductive metal parts 222 and tabs 110 are arranged in a one-to-one correspondence, with each conductive metal part 222 connected to a PCM board 210, which in turn is connected to a flexible circuit board 221. Alternatively, one conductive metal part 222 can connect to two, three, or more tabs 110; this is not limited here.

[0033] To save height space in the battery 1000 and improve its space utilization, in this embodiment, the conductive element 220 is disposed on the side of the PCM board 210 away from the upper surface of the cell 100. The flexible circuit board 221 extends along the side of the cell 100, and a portion of the flexible circuit board 221 protrudes from the cell 100 to form an exposed portion 2211. Maintaining a certain distance between the conductive element 220 and the cell 100 reduces the risk of short circuits. The conductor running along the cell 100 saves height space in the battery 1000, facilitating an increase in the cell 100's height and thus improving the battery 1000's energy density. The exposed portion 2211 of the flexible circuit board 221, besides connecting to external structures, can also serve as a heat sink to conduct heat from the PCM board 210 or the cell 100 to the external environment. Of course, the flexible circuit board 221 can also extend from the upper surface of the cell 100; this is not limited here.

[0034] Figure 3 This is a cross-sectional view of the battery 1000 provided in an embodiment of this utility model. Please refer to... Figure 2 and Figure 3 In this embodiment, the battery 1000 also includes an insulating adhesive layer 300, which is disposed in the welding area. An insulating adhesive is used at the welding area to form the insulating adhesive layer 300, which protects the welded tabs 110 from contact with the outside environment, preventing micro-short circuits. It also avoids the risk of the tabs 110 breaking after a drop test. Furthermore, the insulating adhesive layer effectively solves the problem of stress cracking under tension after injection molding of the battery 1000. The insulating adhesive in this embodiment includes glue, adhesive tape, etc. After the insulating adhesive is applied to the welding part and part of the tabs 110, it is cured by ultraviolet light or natural curing to improve the strength of the tabs 110.

[0035] In addition, to enhance the overall strength and reliability of the battery 1000, the battery 1000 in this embodiment also includes insulating tape 400, which covers the insulating adhesive layer 300 and the injection-molded protective component 230.

[0036] Figure 4 This is a schematic diagram of the conductor provided in an embodiment of this utility model. Please refer to [link / reference]. Figure 2 and combined Figure 4 In this embodiment, the flexible circuit board 221 is L-shaped. Specifically, a portion of the flexible circuit board 221 is parallel to the PCM board 210, while the remaining portion is perpendicular to the PCM board 210. The portion of the conductor perpendicular to the PCM board 210 is the exposed portion 2211. The exposed soldering position of the flexible circuit board 221 is on the side, facilitating the soldering of the battery cell 100 to the tab 110. Furthermore, the L-shaped design of the flexible circuit board 221 saves lateral space, and the L-shaped structure is more resistant to bending. The bending point can absorb mechanical stress, preventing breakage of the solder joint or conductive component 220. This design saves space and facilitates the connection of the flexible circuit board 221 to external structures. A connector 2214 can be provided in the vertical section, keeping the connector 2214 away from the high-temperature area of ​​the battery cell 100, thus providing some protection for the connector 2214. Of course, the flexible circuit board 221 can also be designed as a straight line or other shapes, which are not limited here.

[0037] Please see Figure 4 In this embodiment, the flexible circuit board 221 has multiple vias 2212. The vias 2212 can be plugged into electrical components on the PCM board 210 to achieve electrical connection between the flexible circuit board 221 and the PCM board 210. Simultaneously, the vias 2212 also serve both heat dissipation and mechanical fixation. The vias 2212 can conduct heat from the battery cell 100 to the side of the flexible circuit board 221 away from the battery cell 100, enhancing heat dissipation. Furthermore, the vias 2212 can locate the soldering positions between the flexible circuit board 221 and the PCM board 210, and the pins of the components plugged into the vias 2212 are soldered through them, improving mechanical support. The vias 2212 can also reduce stress concentration, lowering the risk of breakage due to bending of the flexible circuit board 221. Specifically, in this embodiment, the multiple vias 2212 are arranged in an array. This array arrangement of multiple vias 2212 can balance interlayer stress and reduce deformation caused by thermal expansion. Furthermore, the array of multiple vias 2212 allows current to be evenly distributed through the via array, preventing localized overheating and thus improving the long-term reliability of the PCM board 210. Alternatively, the flexible circuit board 221 can be directly connected to the PCM board 210 without vias 2212; this is not a limitation.

[0038] In addition, for easier and faster positioning of the flexible circuit board 221 and PCM board 210, please refer to [further details needed]. Figure 4In this embodiment, the flexible circuit board 221 has multiple positioning holes 2213 on its sidewall. The positioning holes 2213 cooperate with certain structures on the PCM board 210 to achieve rapid positioning of the flexible circuit board 221. Of course, the positioning holes 2213 can also be formed at other locations on the flexible circuit board 221, which is not limited here.

[0039] Please see Figure 4 and combined Figure 2 In this embodiment, a connector 2214 is provided at the end of the flexible circuit board 221 away from the battery cell 100. The connector 2214 being away from the battery cell 100 prevents accidental short circuits caused by metal-to-metal contact, corrosion, or external forces. The battery cell 100 may generate heat during charging and discharging; the connector 2214 being away from the heat source reduces the impact of high temperatures on the connector material, preventing melting or aging. The connector 2214 also enables quick insertion and removal, facilitating assembly.

[0040] The assembly process of a battery 1000 provided in this embodiment is as follows: After the PCM board 210 is connected to the conductive metal part 222, injection molding is performed to cover the conductor and the PCM board 210, forming an injection-molded protective part 230. Only the welding area of ​​the conductive metal part 222 is exposed. Then, the electrode 110 of the cell 100 is welded to the welding area. After welding and assembly, the welded electrode 110 at the welding area is connected with an insulating adhesive to form an insulating adhesive layer 300 to protect the welded electrode 110. Finally, insulating tape is wrapped around the outside to improve the efficiency of assembling the battery 1000 and solve the abnormal cracking at the middle corner of the battery 1000.

[0041] In summary, the battery 1000 includes a PCM assembly 200 and at least one cell 100, with the cell 100 having tabs 110. The PCM assembly 200 includes a PCM plate 210, a conductive element 220, and an injection-molded protective element 230. The PCM plate 210 is disposed on the upper end face of the cell 100, and the tabs 110 and the PCM plate 210 are connected via the conductive element 220. The injection-molded protective element 230 covers the PCM plate 210 and a portion of the conductive element 220. A portion of the conductive element 220 is exposed outside the injection-molded protective element 230, forming an exposed portion 2211. The presence of a conductor facilitates connection to external structures, and the exposed portion 2211 serves both to connect external devices and provides a certain degree of heat dissipation. Furthermore, the PCM plate 210 is first connected to the conductor, and then injection-molded to form the injection-molded protective element 230, which covers the PCM plate 210 and a portion of the conductor. The protective layer formed by the injection-molded protective component 230 can effectively resist mechanical vibration, moisture, dust, etc., and extend the service life of the battery 1000. Moreover, by setting the injection-molded protective component 230, after the PCM component 200 is installed, there is no need to perform injection molding again, which can protect the battery cell 100 from damage caused by external pressure.

[0042] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A battery, characterized in that, include: At least one battery cell (100) having tabs (110). PCM assembly (200), the PCM assembly (200) includes PCM plate (210), conductive element (220) and injection molded protective element (230), the PCM plate (210) is disposed on the upper end face of the cell (100), the tab (110) and the PCM plate (210) are connected through the conductive element (220), the injection molded protective element (230) covers the PCM plate (210) and part of the conductive element (220); part of the conductive element (220) is exposed outside the injection molded protective element (230), forming an exposed part (2211).

2. The battery according to claim 1, characterized in that, The conductive component (220) includes a flexible circuit board (221) and a conductive metal component (222). The conductive metal component (222) is embedded in the injection-molded protective component (230), and a portion of it is exposed to form a welding area. The electrode tab (110) is welded and fixed to the welding area. The flexible circuit board (221) is connected to the conductive metal part (222), and a portion of the flexible circuit board (221) is exposed to the injection-molded protective part (230), forming an exposed portion (2211).

3. The battery according to claim 2, characterized in that, The number of the battery cells (100) is multiple, and the multiple battery cells (100) are arranged side by side and connected and fixed; the number of the conductive metal parts (222) is multiple, and each conductive metal part (222) corresponds to at least one of the tabs (110).

4. The battery according to claim 2, characterized in that, The battery (1000) further includes an insulating adhesive layer (300) disposed in the welding area.

5. The battery according to claim 4, characterized in that, The battery (1000) also includes insulating tape (400), which covers the insulating adhesive layer (300) and the injection-molded protective component (230).

6. The battery according to claim 2, characterized in that, The conductive element (220) is disposed on the side of the PCM board (210) away from the upper end face of the cell (100), the flexible circuit board (221) extends along the side of the cell (100), and a portion of the flexible circuit board (221) extends out of the cell (100) to form an exposed portion (2211).

7. The battery according to claim 2, characterized in that, The flexible circuit board (221) is L-shaped.

8. The battery according to claim 2, characterized in that, The flexible circuit board (221) has multiple vias (2212); the multiple vias (2212) are arranged in an array.

9. The battery according to claim 2, characterized in that, The flexible circuit board (221) has multiple positioning holes (2213) on its sidewall.

10. The battery according to claim 2, characterized in that, The flexible circuit board (221) has a connector (2214) at the end away from the battery cell (100).

11. An electrical appliance, characterized in that, Includes the battery (1000) as described in any one of claims 1-10.

Images