Interconnect and battery pack, electrical device

Abstract

The application discloses an interconnect and a battery pack and an electric device. The interconnect comprises a flexible flat cable, an insulating hard plate and a connector. The flexible flat cable comprises a main cable and a plurality of terminals. The plurality of terminals branch from one end of the main cable and are fixed on the insulating hard plate. Each terminal is electrically connected with at least one wire of the main cable and is electrically connected with a tab of a battery cell. The connector is arranged at the other end of the main cable and is electrically connected with a battery protection plate and the main cable of the flexible flat cable. The insulating hard plate is used to reinforce the weak area of the flexible flat cable, which is beneficial to improving the electrical connection reliability of the terminals and the tabs of the battery cells and meets the design requirement of the battery cell sampling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sampling design of soft package battery, in particular to an interconnect, a battery pack with the interconnect and an electrical equipment. BACKGROUND

[0002] A battery pack usually includes a plurality of battery cells (also known as battery monomers) connected in series or in parallel. Overvoltage, overcurrent or overheating occurring in some battery cells may adversely affect the safety and operating efficiency of the battery pack. Therefore, it is necessary to sample the voltage or current of the battery cells and take appropriate control strategies based on the sampling results.

[0003] To save space, reduce weight and cost, for a battery pack using soft battery cells, a flexible flat cable (FFC) is generally used to electrically connect each battery cell and perform sampling. However, the flexible flat cable is relatively soft, and its structural strength is difficult to meet the sampling design requirements. For example, the area where the terminals of the flexible flat cable are located is relatively soft, and the structural posture has poor shaping ability, resulting in low reliability of the electrical connection between the terminals and the tabs of the battery cells. SUMMARY

[0004] In view of this, the present application provides an interconnect, a battery pack and an electrical equipment to improve the problem of low reliability of electrical connection between the terminals of the existing flexible flat cable and the tabs of the battery cells.

[0005] The first aspect of the present application provides an interconnect for electrically connecting a battery protection board and a battery module. The interconnect includes a flexible flat cable, an insulating hard plate and a connector. The flexible flat cable includes a main cable and a plurality of terminals. The plurality of terminals are connected to one end of the main cable. Each terminal is electrically connected to at least one wire of the main cable and to a tab of a battery cell of the battery module. The plurality of terminals are fixed opposite to the side surface of the insulating hard plate. The connector is arranged at the other end of the main cable and electrically connected to the main cable of the flexible flat cable and the battery protection board.

[0006] The interconnect fixes the terminals of the flexible flat cable on the insulating hard plate, and the insulating hard plate reinforces the weak area (i.e. the area where the terminals are located) of the flexible flat cable, which is beneficial to improve the electrical connection reliability between the terminals and the tabs of the battery cells, thereby meeting the sampling design requirements of the battery cells.

[0007] Optionally, the interconnect further includes a plurality of conductive hard sheets. One conductive hard sheet is connected to one terminal and one tab of the battery module. The conductive hard sheet is a long strip-shaped metal sheet that is not easy to deform. It can be regarded as an extension of the conductive part of the terminal. It not only increases the contact area with the tab, but also makes the connection between the terminal and the tab more stable and reliable, thereby further ensuring the sampling design requirements of the battery cells.

[0008] Optionally, the side of the insulating hard plate is provided with adhesive, and one end of each conductive hard sheet and one end of the main cable are adhered to the side of the insulating hard plate through the adhesive.

[0009] Optionally, the interconnecting piece further comprises insulating sealing glue, which wraps the connection between the terminal and the conductive hard sheet.

[0010] Optionally, the outer side of the terminal is provided with an outer wrapping film, and the insulating sealing glue wraps the outer wrapping film at the connection between the terminal and the conductive hard sheet.

[0011] Optionally, the insulating hard plate is further provided with a positioning mark for positioning when the interconnecting piece is electrically connected to the battery pack.

[0012] Optionally, the positioning mark comprises at least one notch formed in the side edge of the insulating hard plate.

[0013] The second aspect of the present application provides a battery pack comprising a battery module, a battery protection plate, and the interconnecting piece described in any of the preceding aspects, the interconnecting piece electrically connecting the battery module and the battery protection plate.

[0014] The battery pack uses the aforementioned interconnecting piece to relatively fix the terminals of the flexible flat cable on the insulating hard plate, and the insulating hard plate structurally reinforces the weak area (i.e., the area where the terminal is located) of the flexible flat cable, which is conducive to improving the electrical connection reliability between the terminal and the tab of the cell of the battery module, thereby meeting the cell sampling design requirements of the battery pack.

[0015] Optionally, the battery pack further comprises fixing glue, which wraps the connection between the connector and the battery protection plate.

[0016] Optionally, the battery pack further comprises a housing and potting glue, the housing is formed with a cell groove, the cell is accommodated in the cell groove, a side of the cell provided with a tab is provided with a potting area between the cell groove wall, the insulating hard plate and the plurality of terminals are located in the potting area, and the potting glue fills the potting area and wraps the insulating hard plate and the plurality of terminals.

[0017] The third aspect of the present application provides a power consumption device comprising a battery pack and a load. The battery pack is used to supply power to the load, and the battery pack comprises a battery module and an interconnecting piece, the interconnecting piece is used to electrically connect the cell of the battery module and a battery protection plate. The interconnecting piece comprises a flexible flat cable, an insulating hard plate, and a connector. The flexible flat cable comprises a main cable and a plurality of terminals, the plurality of terminals are branched from one end of the main cable, each terminal is electrically connected to at least one wire of the main cable and the tab of the cell of the battery module. The plurality of terminals are fixed to the side of the insulating hard plate. The connector is arranged at the other end of the main cable and electrically connects the main cable of the flexible flat cable and the battery protection plate.

[0018] The use electric equipment adopts the aforementioned interconnection piece, relatively fixes the terminals of the flexible flat cable on the insulating hard plate, and performs structural reinforcement on the weak area (i.e. the terminal area) of the flexible flat cable through the insulating hard plate, which is beneficial to improve the electrical connection reliability of the terminal and the tab of the battery cell, thereby meeting the design requirements of the battery cell sampling.

[0019] Optionally, the interconnection piece further comprises a plurality of conductive hard sheets, one conductive hard sheet being connected with one terminal and one tab of the battery module.

[0020] Optionally, the use electric equipment comprises an electric tool, or a drone, or an electric vehicle, or an electric cleaning tool, or an energy storage product.

[0021] Optionally, one side of the insulating hard plate is provided with adhesive, and one end of each conductive hard sheet and one end of the main cable are respectively pasted on one side of the insulating hard plate through the adhesive.

[0022] Optionally, the interconnection piece further comprises an insulating sealing glue, and the insulating sealing glue wraps the connection between the terminal and the conductive hard sheet.

[0023] The terminal of the flexible flat cable is relatively fixed on the insulating hard plate, the weak area (i.e. the terminal area) of the flexible flat cable is structurally reinforced through the insulating hard plate, in addition, the terminal and the tab are connected through the conductive hard sheet, the conductive hard sheet is a long strip-shaped metal sheet which is not easy to deform, and can be regarded as an extension of the conductive part of the terminal, which not only can increase the contact area with the tab, but also is not easy to deform, so that the connection stability between the terminal and the tab is more reliable, and the combination of the insulating hard plate and the conductive hard sheet is beneficial to improve the electrical connection reliability of the terminal and the tab of the battery cell, thereby meeting the design requirements of the battery cell sampling. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of the interconnection piece of the first embodiment of the present application;

[0025] Figure 2 is a structural schematic diagram of the interconnection piece of the first embodiment of the present application; Figure 1

[0026] Figure 3 is a back structure schematic diagram of the interconnection piece in the terminal area; Figure 1

[0027] Figure 4 is a structural schematic diagram of the battery pack of an embodiment of the present application;

[0028] Figure 5 is a structural schematic diagram of the battery pack of an embodiment of the present application; Figure 4

[0029] Figure 6 ​​​is a structural schematic diagram of the interconnect of the second embodiment of the present application;

[0030] Figure 7 is Figure 6 is a structural schematic diagram of the connector when not connected to the main cable.

[0031] Figure 8 is Figure 7 is a structural schematic diagram of the end of the main cable towards the connector. DETAILED DESCRIPTION

[0032] For the purpose of making the technical scheme, purpose and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with specific embodiments and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all. Based on the embodiments in the present application, each of the following embodiments and its technical features can be combined with each other without conflict.

[0033] It should be understood that in the description of the embodiments of the present application, the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the technical scheme of the corresponding embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0034] Considering that in existing battery modules, the flexible flat cable is relatively soft and has low structural strength, resulting in low electrical connection reliability of the terminals and the tab of the battery cell, it is difficult to meet the design requirements of battery cell sampling. The embodiments of the present application provide an interconnect, which relatively fixes the terminals of the flexible flat cable on an insulating hard plate, and performs structural reinforcement on the weak part (e.g. the area where the terminals are located) of the flexible flat cable through the insulating hard plate, to improve the electrical connection reliability of the terminals and the tab of the battery cell.

[0035] Figure 1 is a structural schematic diagram of the interconnect of the first embodiment of the present application. Please refer to Figure 1 The interconnect 10 includes a flexible flat cable 11, a connector 12 and an insulating hard plate 13.

[0036] The flexible flat cable 11 includes a main cable 111 and a plurality of terminals 112. The main cable 111 can be arranged in a strip shape, and has a plurality of wires, such as copper wires with high conductivity, inside. The plurality of terminals 112 are branched from one end of the main cable 111, and can be arranged on opposite sides of the main cable 111, and each terminal 112 is electrically connected to at least one wire of the main cable 111.

[0037] In combination Figure 1 And Figure 2 As shown in FIG. 1, each terminal 112 includes a branch part 112a and a pin 112b. The branch part 112a is branched from one end of the main cable 111 and is folded towards the side. The pin 112b extends from the branch part 112a and is electrically connected to the wire of the main cable 111 through the branch part 112a.

[0038] The number of terminals 112 can be the same as the number of the tabs of the battery module. When sampling the information of the battery module, each terminal 112 is electrically connected to one tab of the battery module.

[0039] The terminals 112 are fixed opposite to the side of the insulating hard board 13. In an embodiment, the terminals 112 can be fixed on one side of the insulating hard board 13. The insulating hard board 13 is a long strip-shaped board with high structural strength (which can be understood as the ability to shape the structure) and is not easy to deform, and specifically includes but is not limited to a polycarbonate (PC) board.

[0040] In combination Figure 3 As shown in FIG. 2, the width of the insulating hard board 13 can be equal to the width of the main cable 111, and the structural strength of the insulating hard board 13 is greater than that of the main cable 111. At this time, the insulating hard board 13 can be regarded as an extension of the main cable 111. When the terminals 112 are fixed on the insulating hard board 13, the structural strength of the area where the terminals 112 of the flexible flat cable 11 are located is strengthened through the insulating hard board 13.

[0041] The connector 12 is arranged at the other end of the main cable 111. The connector 12 is provided with a plurality of pins 12a, and each pin 12a is electrically connected to each wire of the main cable 111.

[0042] In the scenario of sampling the information such as voltage or current of the battery module, the terminals 112 of the flexible flat cable 11 are electrically connected to the tabs of the battery module, and the pins 12a of the connector 12 are electrically connected to the battery protection board. In this way, the flexible flat cable 11 is electrically connected to the battery module and the battery protection board, and the battery protection board, also known as the battery management system (BMS) board, can sample the information such as voltage or current of the battery module, and take appropriate control strategies according to the sampling results to ensure the safe operation of the battery module.

[0043] In the embodiment of the present application, the terminals 112 of the flexible flat cable 11 are fixed opposite to the side of the insulating hard board 13, and the structural strength of the weak part of the flexible flat cable 11 is compensated through the insulating hard board 13, that is, Figure 1The structural orientation of the area where terminal 112 is located, as shown by the dashed line, is enhanced, which helps to ensure the positioning of terminal 112 and improves the reliability of the electrical connection between terminal 112 and the cell tab, thereby meeting the cell sampling design requirements.

[0044] Based on the foregoing description, adhesive can be provided on one side of the insulating rigid plate 13, and one end of the main cable 111 is glued and fixed to the insulating rigid plate 13 by adhesive.

[0045] During transportation and installation, the area where terminal 112 is located will not deform, and the position of terminal 112 on the insulating rigid plate 13 will not change. Furthermore, as a branch of the main cable 111, the adhesive application of terminal 112 can increase the connection strength between terminal 112 and the main cable 111. For example, in the prior art, the tensile force that a single branch can withstand is about 30 Newtons, while in the embodiments of this application, the tensile force that a single branch can withstand can be increased by 5 to 10 times.

[0046] Please continue reading. Figure 1 and Figure 2 The interconnect 10 also includes a plurality of conductive plates 14. The number of conductive plates 14 may be the same as the number of terminals 112 and the same as the number of tabs of the battery module. One terminal 112 is fixed to one conductive plate 14.

[0047] The arrangement of these conductive plates 14 relative to the main cable 111 should be adapted to the position of the tabs 311 of the battery cell 31. Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, these conductive hard sheets 14 can be arranged sequentially on both sides of the insulating hard plate 13.

[0048] In scenarios where information such as the battery module's voltage is sampled, please also consider... Figure 4 and Figure 5 As shown, a conductive hard plate 14 is fixed to a tab 311 of the battery module 30, such that a terminal 112 is electrically connected to a tab 311 of the battery module 30 through a conductive hard plate 14, and the gold fingers 12a of the connector 12 are electrically connected to the battery protection board (not shown).

[0049] Therefore, the flexible flat cable 11 electrically connects each cell 31 of the battery module 30 to the battery protection board. The battery protection board samples the voltage and other information of each cell 31 and adopts corresponding control strategies based on the sampling results to ensure the safe operation of the battery module 30.

[0050] The conductive hard sheet 14 is a long strip-shaped metal sheet with high structural strength and low deformation, such as a nickel sheet, which can be regarded as an extension of the conductive part of the terminal 112. The conductive hard sheet 14 can not only increase the contact area with the tab 311, but also has low deformation, so that the connection stability between the terminal 112 and the tab 311 is more reliable, thereby further ensuring that the design requirements of the battery cell sampling are met.

[0051] One end of the conductive hard sheet 14 can be fixed to the insulating hard plate 13 by an adhesive, as shown in FIG. 4. The gold finger 112b of the terminal 112 is fixed to the conductive hard sheet 14, so as to realize the fixation of the terminal 112 and the insulating hard plate 13. Figure 2

[0052] The terminal 112 and the conductive hard sheet 14 can be fixed in an adaptive manner, for example, as shown in FIG. 5, the connection part between the terminal 112 and the conductive hard sheet 14 is wrapped by the insulating sealing glue 15. The connection part is a weak point, and the insulating sealing glue 15 can enhance the connection reliability of the connection part. Figure 6

[0053] Generally, the outer side of the flexible flat cable 11 is covered with an outer covering film for protecting the internal lines. The terminal 112 is a branch of the main cable 111, and as shown in FIG. 6 and FIG. 7, the outer side of the branch part 112a of the terminal 112 is also provided with an outer covering film. Therefore, a part of the outer covering film in the terminal 112 region (i.e., a part of the branch part 112a) is overlapped on the conductive hard sheet 14, and the insulating sealing glue 15 also wraps the outer covering film at the connection part between the terminal 112 and the conductive hard sheet 14. In this way, the structural strength of the connection part can be improved, so that the structural strength of the connection part is greater than the structural strength of the flexible flat cable 11 itself, thereby enhancing the connection reliability of the connection part. Figure 1 Figure 2 As shown in FIG. 8, FIG. 9, FIG. 10 and FIG. 11, the insulating hard plate 13 is also provided with a positioning mark 131 for positioning when the interconnection piece 10 is electrically connected to the battery module 30.

[0054] As shown in FIG. 8, FIG. 9, FIG. 10 and FIG. 11, the insulating hard plate 13 is also provided with a positioning mark 131 for positioning when the interconnection piece 10 is electrically connected to the battery module 30. Figure 1 Figure 2 Figure 5 Figure 6 In one implementation, the positioning mark 131 can be at least one notch opened in the side edge of the insulating hard plate 13, for example, two notches opened in the same side edge of the insulating hard plate 13. The terminal 112 and the conductive hard sheet 14 can be arranged between the two notches. The battery cell slot of the battery module 30 is provided with two positioning columns, and when the two positioning columns are respectively clamped in the two notches, it indicates that each conductive hard sheet 14 (and the terminal 112 connected thereto) is aligned with each tab 311 of the battery cell 31. Then, the conductive hard sheet 14 and the tab 311 are fixed by laser welding.

[0055]

[0056] ​​​​​​​Another embodiment of the present application provides a battery pack. Please continue to refer to Figure 4 and Figure 5 As shown in the figure, the battery pack includes a battery module 30, a battery protection board (not shown in the figure), and the interconnect 10 of any of the above embodiments, and the battery module 30 and the battery protection board are electrically connected through the interconnect 10, and the battery module 30 further includes a shell 32 and a plurality of battery cells 31.

[0057] The shell 32 surrounds the shape of the battery module 30 and defines its appearance. The shell 32 is formed with a battery cell groove, and the internal components (such as the plurality of battery cells 31) of the battery module 30 are built into the battery cell groove. The shell 32 protects the components inside the battery module 30, which can improve the protection effect of the battery cells 31 and ensure the safety of the battery module 30.

[0058] The number of battery cells 31 can be determined according to the power design requirements of the battery pack, which is not limited herein. These battery cells 31 are accommodated in the battery cell groove of the shell 32, for example, are arranged in the first direction x shown by the arrow in the middle of the figure. Figure 5

[0059] These battery cells 31 are combined into an effective power supply and / or charging unit of the battery pack by being connected in series or parallel. These battery cells 31 include but are not limited to soft package battery cells, and the structures can be completely the same. In some descriptions herein, a single battery cell 31 is taken as an example for illustration. One end (the left end shown in the figure) of the battery cell 31 has a tab 311, including a positive tab and a negative tab. Figure 5

[0060] One end of the interconnect 10 is inserted between the left end of the battery cell 31 and the groove wall of the battery cell groove. The insulating hard plate 13 compensates for the structural strength of the flexible flat cable 11 in the area where the terminal 112 is located, which is conducive to ensuring the positioning of the terminal 112. One conductive hard sheet 14 is fixed and electrically connected with one tab 311 of the battery cell 31, thereby realizing the electrical connection between the terminal 112 and the tab 311 of the battery cell 31. In addition, the gold finger 12a of the connector 12 is electrically connected with the battery protection board.

[0061] In this way, the flexible flat cable 11 electrically connects the battery module 30 and the battery protection board. The battery protection board samples the voltage or current information of the battery module 30, and takes appropriate control strategies according to the sampling results, to ensure the safe operation of the battery module 30 and the battery pack.

[0062] The flexible flat cable 11 is usually very thin, and at the connection with the connector 12, the Figure 7 and Figure 8 ​​As shown, the gold fingers 11a of the flexible flat cable 11 are very easy to be oxidized and corroded, which leads to a large internal resistance at the connection with the connector 12, resulting in inaccurate information of the collected voltage and / or current, affecting the sampling and control of the battery pack. To this end, the battery pack can protect the structural connection at this position by fixing glue.

[0063] The fixing glue can be dispensed on the battery protection plate and wrapped around the connection between the connector 12 and the battery protection plate. The fixing glue can protect the gold fingers 11a of the flexible flat cable 11 connected with the connector 12, and also protect the gold fingers 12a of the connector 12 connected with the battery protection plate, avoiding the oxidation and corrosion of the gold fingers at the two positions, and also protecting other electrical devices at the connection position, and enhancing the structural strength and connection reliability of the connection position. According to actual experimental data, the tensile force that the connection position can withstand can be increased by 5 to 10 times.

[0064] Please continue to refer to Figure 4 and Figure 5 As shown, the battery pack is also provided with potting glue 33. The side of the battery cell 31 provided with the tab 311 is spaced apart from the slot wall of the battery cell slot, thereby forming a potting area, and the insulating hard plate 13 and the plurality of terminals 112 are located in the potting area. In this regard, the potting glue 33 not only encapsulates and protects all the battery cells 31, but also fills in the potting area, so that the weak area of the flexible flat cable 11 is completely wrapped by the potting glue 33.

[0065] Based on this, the embodiments of the present application further reinforce the structure of the weak area of the flexible flat cable 11 by the potting glue 33, which is conducive to improving the electrical connection reliability of the terminals 112 and the tabs 311, thereby meeting the sampling design requirements of the battery cells 31.

[0066] In addition, the design of the potting glue 33 covers the structural elements at the side end of each battery cell 31, such as the tab 311 or the encapsulated side of the soft-pack battery cell 31, thereby achieving safety protection for the side end of the battery cell 31 and reducing the risk of corrosion.

[0067] Another embodiment of the present application provides a power consumption device, which includes the battery pack of any of the above embodiments. The power consumption device can be implemented in various specific forms, for example, in actual application scenarios, the power consumption device includes but is not limited to electronic products such as power tools, drones, electric vehicles, electric cleaning tools, energy storage products, electric vehicles, electric bicycles, electric navigation tools, etc.

[0068] Those skilled in the art can understand that, in addition to elements specifically used for mobile purposes, the structure according to the embodiments of the present application can also be applied to fixed-type power consumption devices.

[0069] As the electrical device has the battery pack of any of the foregoing embodiments, the electrical device can produce the beneficial effects that the battery pack of the corresponding embodiment has.

[0070] The above merely provides part of the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present specification and drawings is also included in the patent protection scope of the present application.

[0071] Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus including the element, and in addition, the components, features, elements with the same name in different embodiments can have the same meaning, or can have different meanings, and the specific meaning thereof should be determined in combination with the explanation in the specific embodiment or further in combination with the context in the specific embodiment.

[0072] In addition, although the terms "first", "second", "third" and the like are used herein to describe various information, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. As used herein, the singular forms "a", "an" and "the" are intended to include plural forms as well. The terms "or" and "and / or" are interpreted as inclusive, or mean any one or any combination. Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way will there be an exception to this definition.

Claims

1. A battery pack, characterized by, The battery pack comprises a battery module, a battery protection plate, and an interconnection, the interconnection electrically connecting the battery module and the battery protection plate, the interconnection comprising: The flexible flat cable comprises a main cable and a plurality of terminals, the plurality of terminals being connected to a branch of the main cable at one end, each of the terminals being electrically connected to at least one wire of the main cable and to a tab of a cell of the battery module, each of the terminals comprising a branch part and a gold finger, the branch part being a branch of the main cable at one end, the gold finger extending outwardly from the branch part and being electrically connected to the wire of the main cable via the branch part; An insulating hard plate is provided, and the plurality of terminals are fixed to opposite sides of the insulating hard plate; A connector is arranged at the other end of the main cable and electrically connects the main cable of the flexible flat cable and the battery protection plate; The interconnection further comprises a plurality of conductive hard sheets, one conductive hard sheet connecting one terminal and one tab of the battery module; One end of each of the conductive hard sheets and one end of the main cable are respectively adhered to the side of the insulating hard plate by means of an adhesive.

2. The battery pack of claim 1, wherein, The interconnection further comprises an insulating encapsulant, which encapsulates the connection between the terminals and the conductive hard sheets.

3. The battery pack of claim 2, wherein, The outer side of the terminal is provided with an outer wrapping film, and the insulating encapsulant encapsulates the outer wrapping film of the connection between the terminal and the conductive hard sheet.

4. The battery pack of claim 1, wherein, The insulating hard plate is further provided with alignment marks for positioning when the interconnection electrically connects the battery module.

5. The battery pack of claim 1, wherein, The battery pack further comprises a fixing adhesive, which encapsulates the connection between the connector and the battery protection plate.

6. The battery pack of claim 1, wherein, The battery pack further comprises a housing and a potting adhesive, the housing being formed with a cell slot, the cell being accommodated in the cell slot, a potting area being provided between the side of the cell provided with the tab and the slot wall of the cell slot, the insulating hard plate and the plurality of terminals being located in the potting area, and the potting adhesive filling the potting area and encapsulating the insulating hard plate and the plurality of terminals.

7. An electric device, characterized by The battery pack comprises a battery module, a battery protection plate, and an interconnection, the interconnection electrically connecting the battery module and the battery protection plate, the interconnection comprising: The flexible flat cable comprises a main cable and a plurality of terminals, the plurality of terminals being connected to a branch of the main cable at one end, each of the terminals being electrically connected to at least one wire of the main cable and to a tab of a cell of the battery module, each of the terminals comprising a branch part and a gold finger, the branch part being a branch of the main cable at one end, the gold finger extending outwardly from the branch part and being electrically connected to the wire of the main cable via the branch part; An insulating hard plate is provided, and the plurality of terminals are fixed to opposite sides of the insulating hard plate; A connector is arranged at the other end of the main cable and electrically connects the main cable of the flexible flat cable and the battery protection plate; The interconnection further comprises a plurality of conductive hard sheets, one conductive hard sheet connecting one terminal and one tab of the battery module; The outer side of the terminal is provided with an outer wrapping film, and the insulating encapsulant encapsulates the outer wrapping film of the connection between the terminal and the conductive hard sheet. ​ The side of the insulating hard plate is provided with adhesive, and one end of each of the conductive hard sheets and one end of the main cable are respectively pasted on the side of the insulating hard plate through the adhesive.

8. The powered device of claim 7, wherein, The electric device includes electric tools, or unmanned aerial vehicles, or electric vehicles, or electric cleaning tools, or energy storage products.

9. The powered device of claim 7, wherein, The side of the insulating hard plate is provided with adhesive, and one end of each of the conductive hard sheets and one end of the main cable are respectively pasted on the side of the insulating hard plate through the adhesive.

10. The powered device of claim 7, wherein, The interconnecting piece further comprises an insulating sealant, which wraps the connection between the terminal and the conductive hard sheet.

Images