Battery device and electric appliance

Abstract

The application discloses a battery device and an electric device. The battery device comprises a battery cell assembly, an insulation piece, a busbar piece and a signal acquisition piece. The battery cell assembly comprises a plurality of battery cells. The insulation piece comprises a first part and a second part. The first part is arranged on one side of the battery cell assembly in a first direction. The second part is foldably connected to at least one side of the first part in a second direction and is stacked on the side of the first part opposite to the battery cell assembly. The second direction intersects the first direction. The busbar piece is arranged on the first part and is configured to electrically connect at least two battery cells. The signal acquisition piece is arranged on the second part and is configured to acquire voltage signals and / or temperature signals of the battery cells. The technical scheme of the application can improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical appliance. Background Technology

[0002] In related technologies, multiple battery cells in a battery device are typically electrically connected in series and parallel via a busbar. Furthermore, to monitor the voltage and temperature of the battery cells, a signal acquisition device is added and electrically or thermally coupled to the busbar to indirectly acquire the voltage and / or temperature signals of the battery cells.

[0003] However, when the battery cells are small in size and stacked compactly, the distance between the busbar and the signal acquisition device becomes smaller. Consequently, when the busbar is fixed to the battery cell's terminal post by welding, the high temperature generated by welding can easily cause ablation damage to the signal acquisition device, preventing it from working normally and stably and affecting the reliability of the battery device. Utility Model Content

[0004] The main objective of this application is to provide a battery device and an electrical appliance designed to improve the reliability of the battery device.

[0005] To achieve the above objectives, the battery device proposed in this application includes: A battery cell assembly, which includes multiple battery cells; An insulating component includes a first part and a second part. The first part is disposed on one side of the battery cell assembly in a first direction. The second part is foldably connected to at least one side of the first part in a second direction and is stacked on the side of the first part facing away from the battery cell assembly. The second direction intersects the first direction. A busbar, located in the first part and configured to electrically connect at least two battery cells; and A signal acquisition unit is located in the second part and configured to acquire voltage and / or temperature signals of individual battery cells.

[0006] The battery device in this application has a busbar and a signal acquisition unit respectively disposed in a first part and a second part of an insulating member, allowing the battery cell assembly to be supplied to one side of the battery cell assembly in a single operation via the insulating member. Furthermore, since the second part is foldably connected to at least one side of the first part in the second direction, the second part and the first part can be unfolded when the busbar and the battery cell's terminal are not welded. In this case, the second part can temporarily utilize the space on one side of the first part in the second direction, ensuring sufficient distance between the welding position of the busbar and the terminal and the signal acquisition unit located in the second part. This reduces the impact of the high temperature generated during the welding process on the signal acquisition unit, allowing it to operate normally and stably, thus improving the reliability of the battery device. After welding the busbar and the terminal, the second part can be folded to the side of the first part opposite to the battery cell assembly to achieve a compact arrangement.

[0007] In some embodiments, the insulating member further includes a third part, with opposite sides of the third part connected to the first part and the second part respectively; the third part is made of a flexible material, and the second part is foldably connected to the first part through the third part.

[0008] Therefore, the third part can be smoothly bent and formed into a bend, so that the second part can be stacked flat on the side of the first part that is away from the battery cell assembly, reducing the impact of the thickness of the first and second parts on folding, and improving the convenience of folding the second part and the effect after folding.

[0009] In some embodiments, the third part includes a material reduction section.

[0010] This reduces the rebound performance of the third part after bending, thereby reducing the possibility of the second part rebounding on the side of the first part facing away from the battery cell assembly, thus improving the production efficiency of the battery device.

[0011] In some embodiments, the material reduction section includes at least one of a material reduction hole and a material reduction groove.

[0012] This allows for a simpler structure of the material reduction section, which in turn improves the ease of manufacturing the third part.

[0013] In some embodiments, there are multiple material reduction sections, which are arranged at intervals along a third direction, with the first direction, the second direction, and the third direction intersecting each other.

[0014] This can further simplify the structural design of the insulating parts and improve the ease of their processing and manufacturing; at the same time, it can also reduce the springback strength at various points along the length of the third part, so as to better reduce the springback performance of the third part after bending.

[0015] In some embodiments, the thickness of the third portion is less than the thickness of the first portion and the thickness of the second portion, respectively.

[0016] This reduces the rebound performance of the third part after bending, thereby reducing the possibility of the second part rebounding on the side of the first part facing away from the battery cell assembly, thus improving the production efficiency of the battery device.

[0017] In some embodiments, the first part and the second part are both made of flexible materials, and the first part, the second part and the third part are configured as an integrally molded structure.

[0018] This allows the first, second, and third parts to be formed into a single molded structure, enabling efficient production through a single-piece molding process. Simultaneously, it improves the connection strength between these parts, ensuring stable support for the busbars and signal acquisition components, further enhancing the reliability of the battery device.

[0019] In some embodiments, the busbar and the signal acquisition device are located on the same side of the insulating member. The signal acquisition device is a flexible circuit board, which includes a main board and a first branch. The main board is located in the second part. The first branch is connected to one side of the main board and is correspondingly arranged with the third part. The first branch is electrically connected to the busbar.

[0020] Therefore, the first branch can be bent similarly to the third part during the folding process of the second part, so that the pre-completed electrical connection between the signal acquisition device and the busbar will not affect the folding of the second part, making it easy to achieve smooth and accurate folding of the second part.

[0021] In some embodiments, the flexible circuit board further includes a second branch connected to the side of the main board away from the first branch; the second branch is provided with a temperature sensor thermally coupled to the busbar.

[0022] Therefore, the second branch and the first branch are still distributed on both sides of the width direction of the main plate, which makes full use of the space on both sides of the width direction of the main plate, improves the convenience of arranging the first branch and the second branch, and makes it less likely to cause interference.

[0023] In some embodiments, the first portion has a first surface facing away from the battery pack, and the second portion has a second surface facing the first surface; a busbar is disposed on the first surface, and a signal acquisition device is disposed on the second surface; the battery device further includes a support member, which abuts against the first surface and the second surface, and is staggered from the busbar and the signal acquisition device, respectively.

[0024] Therefore, this support member can support the folded second part, allowing it to be stably folded into the desired flat position. Simultaneously, the support member also allows the signal acquisition components, excluding the first branch, to be spaced apart from the busbar, reducing the possibility of short circuits.

[0025] In some embodiments, one side of the second part is foldably connected to the first part, and the opposite side is provided with a mounting protrusion, on which a support member is provided.

[0026] This allows for both convenient installation of support components and compact structural distribution.

[0027] In some embodiments, the support is bonded to the first surface.

[0028] Therefore, the support can be stably fixed in the required position so as to stably support the second part.

[0029] In some embodiments, the support is bonded to the second surface.

[0030] Therefore, the second part can be stably folded over the first part, so that the signal acquisition device set on the second part can work normally and stably, improving the reliability of the battery device.

[0031] In some embodiments, the support member is made of an elastic material.

[0032] Therefore, the folding of the second part can act as a buffer, reducing the possibility of damage to the signal acquisition component or other parts caused by folding collisions.

[0033] In some embodiments, the number of busbars is multiple, and the multiple busbars are arranged side by side with intervals, with each busbar extending along a second direction.

[0034] Therefore, each busbar can be electrically connected to the signal acquisition unit on the second part by approaching one end of the second part in the second direction.

[0035] In some embodiments, there are two insulating elements, and the busbar and signal acquisition element are located between the two insulating elements.

[0036] This provides a more stable load-bearing capacity for the busbar and signal acquisition components; at the same time, it also provides better insulation against the high temperatures during the welding process of the busbar and pole, reducing the impact on the signal acquisition components.

[0037] On the other hand, the electrical equipment proposed in this application includes the battery device in any of the above embodiments. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application; Figure 2 This is a schematic diagram of the structure of an embodiment of the battery device of this application; Figure 3 This is a schematic diagram of the structure of a single battery cell according to an embodiment of this application; Figure 4 This is a schematic diagram of the folded state of an embodiment of the insulating component of this application; Figure 5 for Figure 4 A partial structural diagram; Figure 6 This is a cross-sectional schematic diagram of an embodiment of the insulating component of this application in a folded state; Figure 7 for Figure 4 A schematic diagram of the structure without the insulating components; Figure 8 for Figure 7 A partial structural diagram; Figure 9 for Figure 8 A magnified view of a portion of point A in the middle; Figure 10 This is a schematic diagram of the unfolded state of an embodiment of the insulating component of this application; Figure 11 for Figure 10 A partial structural diagram; Figure 12 for Figure 11 A magnified view of a portion of point B in the middle; Figure 13 for Figure 10 A schematic diagram of an explosion structure; Figure 14 for Figure 13 A partial structural diagram.

[0040] Explanation of icon numbers: 100. Battery assembly; 1. Battery box; 1a. Receptacle; 11. Box cover; 12. Box body; 20A. Battery cell assembly; 20. Battery cell; 20B. Battery pack; 21. End cap; 21a. Terminal post; 22. Housing; 23. Electrode assembly; 231. Tab; 30. Insulator; 31. First part; 311. Exposed hole; 313. First surface; 33. Second part; 331. Second surface; 333. Mounting protrusion; 35. Third part; 351. Material reduction part; 353. Material reduction hole; 40. Busbar; 50. Signal acquisition component; 51. Flexible circuit board; 511. Main board; 513. First branch; 515. Second branch; 60. Support component; 70. Transition component; 200. Controller; 300. Motor; 1000. Vehicle; X. First direction; Y. Second direction; Z. Third direction.

[0041] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0046] A battery device, or energy storage device, is widely used not only in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. A battery device can include a battery box and individual battery cells housed within the battery box. The battery box can include a box body and a cover that closes to the box body to enclose a cavity containing the individual battery cells. The individual battery cell is the smallest unit that makes up a battery, typically including a casing and an electrode assembly housed within the casing. The electrode assembly is the component in the individual battery cell where the electrochemical reaction actually occurs, and can include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. Furthermore, at least two individual battery cells within the battery box can be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0047] Furthermore, multiple battery cells in a battery device are typically connected in series and parallel via a busbar. Moreover, to monitor the voltage and temperature of the battery cells, a signal acquisition device is further installed and electrically or thermally coupled to the busbar to indirectly acquire the voltage and / or temperature signals of the battery cells.

[0048] However, when the individual battery cells are small and stacked compactly, the distance between the busbar and the signal acquisition device becomes smaller. For example, when multiple battery cells are stacked along their thickness to form a battery pack, and these cells are connected in parallel while two adjacent battery packs are connected in series, the signal acquisition device needs to run a wire along the length of the battery cells between the terminals of adjacent cells. In this case, with the small thickness of the battery cells, the high temperatures generated during the subsequent welding of the busbar and terminals can easily cause ablation and damage to the signal acquisition device, preventing it from operating normally and stably, thus affecting the reliability of the battery device.

[0049] Therefore, based on the above considerations, in order to reduce the impact of the high welding temperature during the welding process between the busbar and the terminal post on the signal acquisition device, and to improve the reliability of the battery device by ensuring the normal and stable operation of the signal acquisition device, this application proposes a novel battery device. This battery device innovatively configures the insulating component supporting the busbar and the signal acquisition device as comprising a first part and a second part, respectively supporting the busbar and the signal acquisition device; and the second part is foldable to the first part, so that during the welding process between the busbar and the terminal post, the second part and the first part can be unfolded, ensuring sufficient distance between the welding position of the busbar and the terminal post and the signal acquisition device located in the second part, reducing the possibility of the high temperature generated during the welding process affecting the signal acquisition device; after welding is completed, the second part can be folded onto top of the first part.

[0050] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices to provide power to them. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, and spacecraft. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0051] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0052] Please refer to Figure 1 In one embodiment of this application, the vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0053] In one embodiment of this application, the battery device 100 can also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000, and can also be used to supply power to electrical appliances on the vehicle 1000.

[0054] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a battery case 1 and a battery cell assembly 20A; the battery case 1 has a receiving cavity 1a, and the battery cell assembly 20A is disposed inside the battery case 1.

[0055] The battery box 1 can be used to form a receiving cavity 1a to provide a space for housing the battery cell assembly 20A. The battery box 1 can adopt various structures. In some embodiments, the battery box 1 can include a cover 11 and a body 12 that overlap each other to jointly define the receiving cavity 1a for housing the battery cell assembly 20A. In this case, the body 12 can provide housing support for the battery cell 20A. Alternatively, both the cover 11 and the body 12 can be hollow structures with an opening on one side. In this case, the opening side of the cover 11 can cover the opening side of the body 12. Of course, the cover 11 can also be a plate-like structure and cover the opening side of the body 12. In addition, the battery box 1 formed by the cover 11 and the body 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0056] The battery cell assembly 20A may include multiple battery cells 20. A battery cell 20 is the smallest unit constituting the battery device 100. Multiple battery cells 20 may be connected in series, parallel, or a combination thereof; a combination thereof means that multiple battery cells 20 are connected in both series and parallel. Furthermore, multiple battery cells 20 may be arranged along their thickness direction to form a battery pack 20B. The battery device 100 may include only one battery pack 20B, or it may include at least two battery packs 20B arranged side-by-side.

[0057] In addition, each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0058] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell 20 provided in some embodiments of this application. The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0059] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure or impact, giving battery cell 20 higher structural strength and improving reliability. Functional components such as terminals 21a can be provided on end cap 21. Terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating structure can also be provided on the inner side of end cap 21. The insulating structure can be used to isolate electrical components inside housing 22 from end cap 21 to reduce the risk of short circuits. For example, the insulating structure can be made of plastic, rubber, etc.

[0060] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0061] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the electrode body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 231. The positive and negative tabs may be located together at one end of the electrode body or separately at both ends of the electrode body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 231 connect to the terminals 21a to form a current loop.

[0062] Please refer to the reference. Figure 2 ,as well as Figures 4 to 6 In one embodiment of this application, the battery device 100 further includes an insulating member 30, a busbar 40, and a signal acquisition member 50; the insulating member 30 includes a first portion 31 and a second portion 33, the first portion 31 being disposed on one side of the battery cell assembly 20A in a first direction X; the second portion 33 being foldably connected to at least one side of the first portion 31 in a second direction Y, and stacked on the side of the first portion 31 facing away from the battery cell assembly 20A, the second direction Y intersecting the first direction X; the busbar 40 being disposed on the first portion 31 and configured to electrically connect at least two battery cells 20; the signal acquisition member 50 being disposed on the second portion 33 and configured to acquire voltage signals and / or temperature signals of the battery cells 20.

[0063] The busbar 40 can be welded to the terminal 21a of the battery cell 20 to electrically connect at least two battery cells 20, thereby realizing series and / or parallel connection between the battery cells 20. For example, in the same battery pack 20B, any two adjacent battery cells 20 can be connected in series through a busbar 40. Alternatively, in the same battery pack 20B, the positive terminal 21a of all battery cells 20 can be connected in parallel through a busbar 40, and the negative terminal 21a can be connected in parallel through another busbar 40. In this case, one busbar 40 can be provided for each of the two adjacent battery packs 20B. That is, one edge of the busbar 40 can be used to connect the positive terminal 21a in one battery pack 20B in parallel, the other edge can be used to connect the negative terminal 21a in another battery pack 20B in parallel, and the middle part can be used to realize series connection between two adjacent battery packs 20B. Alternatively, in two adjacent battery packs 20B, the positive terminals 21a in one battery pack 20B can be connected in parallel through a busbar 40, and the negative terminals 21a in the other battery pack 20B can be connected in parallel through another busbar 40. Then, another busbar 40 can be placed between these two busbars 40 to achieve series connection between the two adjacent battery packs 20B. Therefore, this application does not limit the number or arrangement of the busbars 40. Furthermore, the busbars 40 can be made of conductive materials, such as aluminum or copper. In addition, the busbars 40 can be located on one side of the battery cell assembly 20A in the first direction X, and the battery cell 20 can have terminals 21a on the side facing the busbar 40. When the battery device 100 is in normal installation and use, the first direction X can be vertical. Of course, in other embodiments, the first direction X can also be horizontal; this application does not limit the specific type of the first direction X.

[0064] The insulating component 30 can carry the busbar 40 and the signal acquisition component 50 through the first part 31 and the second part 33 respectively, so that they can be delivered to one side of the battery cell assembly 20A in the first direction X at one time; at the same time, the insulating component 30 can also play a corresponding insulating protection role, so that the electrical connection between the busbar 40 and the battery cell 20 is established only at the terminal post 21a.

[0065] The first part 31 can be disposed between the battery cell assembly 20A and the busbar 40. When the busbar 40 is disposed on the upper side of the battery cell assembly 20A as described above, the first part 31 can be disposed on the upper side of the battery cell assembly 20A, and the busbar 40 can be disposed on the upper surface of the first part 31. In this case, to facilitate the electrical connection between the busbar 40 and the terminal 21a of the battery cell 20, the first part 31 can be provided with exposure holes 311 at the corresponding positions of each busbar 40, so as to expose the busbar 40 portion for welding to the corresponding terminal 21a of the battery cell 20. The first part 31 can be a flexible insulating film, for example, made of materials such as polyester, polyimide, or polytetrafluoroethylene. The bonding and fixing method between the insulating film and the busbar 40 can be hot-press bonding, room-temperature pressure-sensitive bonding, or heat-shrink wrapping. Of course, the first part 31 can also be a rigid insulating board, for example, it can be made of materials such as polycarbonate, polyphthalamide, or polyamide. Therefore, this application does not limit the material type of the first part 31.

[0066] The second part 33 can be foldably connected to one side of the first part 31 in the second direction Y. Wherein, when the first direction X is vertical as described above, the second direction Y can be horizontal. That is, one side of the second part 33 can be connected to one side of the first part 31 in the horizontal direction. Foldable connection means that the first part 31 and the second part 33 can have an unfolded state and a folded state. In the unfolded state, the second part 33 is horizontally located on one side of the first part 31 in the horizontal direction, and the two are coplanar; in the folded state, the second part 33 is stacked on the upper surface of the first part 31. The second part 33 can be a flexible insulating film, for example, made of polyester, polyimide, or polytetrafluoroethylene. The bonding and fixing method between the insulating film and the signal acquisition component 50 can be hot-press bonding, room-temperature pressure-sensitive bonding, or heat-shrink wrapping. Alternatively, the second part 33 can be a rigid insulating board, for example, made of polycarbonate, polyphthalamide, or polyamide. Therefore, this application does not limit the material type of the second part 33. Furthermore, the material of the second part 33 can be the same as that of the first part 31, or it can be different. Additionally, the second part 33 and the first part 31 can be a single-piece structure, for example, manufactured using extrusion casting, calendering, or injection molding. Alternatively, the second part 33 and the first part 31 can also be separate structures, connected and assembled after each is manufactured.

[0067] Regarding the foldable connection of the second part 33, when the first part 31 and the second part 33 are of the type of flexible insulating film as described above, a V-shaped crease groove can be provided at the connection between the first part 31 and the second part 33 to achieve the foldable configuration of the second part 33. Alternatively, as described below, a third part 35 made of flexible material can be further provided between the first part 31 and the second part 33 to achieve the foldable configuration of the second part 33. Or, when the first part 31 and the second part 33 are of the type of rigid insulating board as described above, one of the first part 31 and the second part 33 can be provided with a pivot, and the other can be provided with a shaft hole, and the foldable configuration of the second part 33 can be achieved through the rotational engagement of the pivot and the shaft hole; of course, the foldable configuration of the second part 33 can also be achieved through the third part 35. Therefore, this application does not limit the foldable connection method of the second part 33.

[0068] The signal acquisition device 50 can be used to electrically connect and / or thermally couple with the busbar 40 to acquire the voltage and / or temperature signals of the battery cell 20. The signal acquisition device 50 can be a flexible circuit board 51, a rigid circuit board, or a wire harness; this application does not limit the type of the signal acquisition device 50.

[0069] The battery device 100 in this application's technical solution has the busbar 40 and signal acquisition unit 50 respectively disposed in the first part 31 and the second part 33 of the insulating member 30. This allows the battery cell assembly 20A to be fed into the insulating member 30 in one go to one side in the first direction X, thereby improving the production efficiency of the battery device 100. Furthermore, since the second part 33 is foldably connected to at least one side of the first part 31 in the second direction Y, the second part 33 and the first part 31 can be unfolded when the busbar 40 and the terminal post 21a of the battery cell 20 are not welded. Figure 10 and Figure 11 As shown. At this time, the second part 33 can temporarily borrow the space on one side of the first part 31 in the second direction Y, so that there can be sufficient distance between the welding position of the busbar 40 and the terminal 21a and the signal acquisition unit 50 located in the second part 33, reducing the impact of the high temperature of the busbar 40 and the terminal 21a during the welding process on the signal acquisition unit 50, so that the subsequent signal acquisition unit 50 can work normally and stably, improving the reliability of the battery device 100. After the welding of the busbar 40 and the terminal 21a is completed, the second part 33 can be folded to the side of the first part 31 that is opposite to the battery cell assembly 20A to achieve a compact distribution, as shown. Figures 4 to 6 As shown, this is to reduce the space occupied by the insulating element 30 in the second direction Y.

[0070] Please refer to the reference. Figures 4 to 6 ,as well as Figure 10 and Figure 11 In one embodiment of this application, in order to reduce the number of signal acquisition components 50 required, the second portion 33 can be foldably connected to one side of the first portion 31 in the width direction. That is, the first direction X can be the thickness direction of the first portion 31, and the second direction Y can be the width direction of the first portion 31, so that both the second portion 33 and the signal acquisition component 50 can extend along the length direction of the first portion 31, thereby facilitating a sufficient length dimension to meet the requirements.

[0071] Please refer to the reference. Figures 4 to 6 ,as well as Figure 10 and Figure 14In one embodiment of this application, the insulating member 30 further includes a third part 35, the opposite sides of which are respectively connected to the first part 31 and the second part 33; the third part 35 is made of a flexible material, and the second part 33 is foldably connected to the first part 31 through the third part 35.

[0072] The third part 35 can be used to connect the first part 31 and the second part 33, and forms a bent portion when the second part 33 is folded over the side of the first part 31 facing away from the battery cell assembly 20A. The material of the third part 35 can be polyester, polyimide, or polytetrafluoroethylene, etc., and this application does not limit the material type of the third part 35. Furthermore, the third part 35 can be a continuous long strip along a third direction Z, or it can be a material-reducing part 351 with multiple material-reducing holes 353 as described below, allowing it to form multiple spaced sub-segments. When the first direction X and the second direction Y are respectively a vertical direction and a horizontal direction, the third direction Z can be another horizontal direction. Alternatively, when the first direction X and the second direction Y are respectively the thickness direction and the width direction of the first part 31, the third direction Z can be the length direction of the first part 31.

[0073] In one embodiment of this application, a third part 35 made of flexible material is provided between the first part 31 and the second part 33, so that the third part 35 can be smoothly bent and formed into a bending part, so that the second part 33 can be stacked in a flat posture on the side of the first part 31 facing away from the battery cell assembly 20A, reducing the impact of the thickness of the first part 31 and the second part 33 on folding, and improving the convenience of folding the second part 33 and the effect after folding.

[0074] Please refer to Figure 14 In one embodiment of this application, the third part 35 is provided with a material reduction section 351.

[0075] The material reduction section 351 refers to the removal of part of the material by means of opening holes, slotting, or cavities.

[0076] In this embodiment, a material reduction section 351 is provided in the third part 35, which can reduce the rebound performance of the third part 35 after bending, thereby reducing the possibility of the second part 33 rebounding on the side of the first part 31 facing away from the battery cell assembly 20A, so as to improve the production efficiency of the battery device 100.

[0077] Please refer to Figure 14 In one embodiment of this application, the material reduction section 351 includes at least one of the material reduction hole 353 and the material reduction groove.

[0078] At least one of these means that the material reduction section 351 may include only the material reduction hole 353, only the material reduction groove, or both the material reduction hole 353 and the material reduction groove.

[0079] In this embodiment, the material reduction section 351 is made into a material reduction hole 353 and a material reduction groove, which makes the structure of the material reduction section 351 simpler and thus improves the convenience of processing and manufacturing the third part 35.

[0080] Please refer to Figure 14 In one embodiment of this application, in order to further simplify the structural configuration of the insulating member 30, the material reduction part 351 can be configured as a material reduction hole 353, and the exposed hole 311 provided on the first part 31 can communicate with the material reduction hole 353 so that the two can be processed at the same time, thereby improving the convenience of its processing and manufacturing.

[0081] Please refer to the reference. Figure 10 , Figure 13 as well as Figure 14 In one embodiment of this application, there are multiple material reduction sections 351, and the multiple material reduction sections 351 are arranged at intervals along the third direction Z.

[0082] In this embodiment, the number of material reduction sections 351 is set to multiple and they are spaced apart along the third direction Z, so that they can play a role in reducing the rebound strength at various points along the length of the third part 35, so as to better reduce the rebound performance of the third part 35 after bending.

[0083] In one embodiment of this application, in order to reduce the springback of the third part 35 after bending, the thickness of the third part 35 may be set to be smaller than the thickness of the first part 31 and the thickness of the second part 33, so that the thickness of the third part 35 is relatively thin and the springback strength is weakened.

[0084] Please refer to the reference. Figure 13 and Figure 14 In one embodiment of this application, the first part 31 and the second part 33 are both made of flexible materials, and the first part 31, the second part 33 and the third part 35 are configured as an integrally formed structure.

[0085] In this embodiment, both the first part 31 and the second part 33 are made of flexible materials, which facilitates the formation of the first part 31, the second part 33, and the third part 35 into an integral structure, enabling efficient production through an integral molding process. Simultaneously, it improves the connection strength between them, providing stable support for the busbar 40 and the signal acquisition component 50, further enhancing the reliability of the battery device 100. Furthermore, using flexible materials for the first part 31 and the second part 33 also improves the overall bendability of the insulating component 30, making it easier to fold the second part 33 to the side of the first part 31 facing away from the battery cell assembly 20A.

[0086] Please refer to the reference. Figures 5 to 12 In one embodiment of this application, the busbar 40 and the signal acquisition device 50 are disposed on the same side of the insulating member 30. The signal acquisition device 50 is a flexible circuit board 51, which includes a main board 511 and a first branch 513. The main board 511 is disposed in the second part 33. The first branch 513 is connected to one side of the main board 511 and is correspondingly disposed with the third part 35. The first branch 513 is electrically connected to the busbar 40.

[0087] The busbar 40 and the signal acquisition unit 50 are located on the same side of the insulating member 30, meaning on the same side in the thickness direction of the insulating member 30. The first branch 513 is connected to the busbar 40, including a transition member 70, such as a nickel sheet, for indirect connection. Alternatively, the first branch 513 can be directly connected to the busbar 40; the connection method can be welding or bonding. Furthermore, there can be multiple first branches 513, arranged along the third direction Z, to electrically connect with multiple busbars 40, thereby enabling the acquisition of voltage signals from more battery cells 20. Additionally, because the busbar 40 and the first branch 513 are relatively close, the first branch 513 can extend along the second direction Y.

[0088] In this embodiment, the signal acquisition component 50 is a flexible circuit board 51, and it is electrically connected to the busbar 40 via a first branch 513, allowing the signal acquisition component 50 and the busbar 40 to be electrically connected before the material arrives. At this time, since the first part 31 and the second part 33 are in an unfolded state and the number of structural components is relatively small, the convenience of connecting the signal acquisition component 50 and the busbar 40 is improved. Furthermore, since the first branch 513 is correspondingly positioned to the third part 35, it can bend similarly to the third part 35 during the folding process of the second part 33. This ensures that the pre-established electrical connection between the signal acquisition component 50 and the busbar 40 does not affect the folding of the second part 33, facilitating smooth and accurate folding of the second part 33.

[0089] Please refer to the reference. Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 10 as well as Figure 13 In one embodiment of this application, the flexible circuit board 51 further includes a second branch 515, which is connected to the side of the main board 511 away from the first branch 513; the second branch 515 is provided with a temperature sensor, which is thermally coupled to the busbar 40.

[0090] In this embodiment, the temperature signal of the battery cell 20 can be acquired by setting the second branch 515. Moreover, the second branch 515 and the first branch 513 are distributed on both sides of the width direction of the main body plate 511, which makes full use of the space on both sides of the main body plate 511 in the width direction, improves the convenience of arranging the first branch 513 and the second branch 515, and makes it less likely to cause interference.

[0091] Please refer to Figure 7 In one embodiment of this application, there can be multiple second branches 515, arranged along the third direction Z, so that temperature signals can be collected from more locations of the battery cell assembly 20A through temperature sensors on each second branch 515. Additionally, the second branches 515 can be partially arranged along the third direction Z, with another portion folded to extend along the second direction Y, so that the end of the second branch 515 away from the main body plate 511 can extend to the desired area for temperature signal collection. Moreover, when not folded, the second branches 515 still extend along the third direction Z along with the main body plate 511, allowing for a more compact distribution and reducing the volume required for raw material production, thereby saving materials and reducing production costs.

[0092] Please refer to the reference. Figure 2 ,as well as Figures 4 to 6In one embodiment of this application, the first part 31 has a first surface 313 facing away from the battery pack 20B, and the second part 33 has a second surface 331 facing the first surface 313; the busbar 40 is disposed on the first surface 313, and the signal acquisition device 50 is disposed on the second surface 331; the battery device 100 also includes a support member 60, which abuts against the first surface 313 and the second surface 331, and is staggered from the busbar 40 and the signal acquisition device 50 respectively.

[0093] In this embodiment, a support member 60 is provided between the first surface 313 and the second surface 331, so that the support member 60 can support the folded second part 33, so that the second part 33 can be stably folded to the required flat posture. At the same time, the support member 60 also allows the part of the signal acquisition unit 50, except for the first branch 513, to be arranged at intervals with the bus unit 40, reducing the possibility of short circuits.

[0094] Please refer to the reference. Figure 10 and Figure 11 In one embodiment of this application, one side of the second part 33 is foldably connected to the first part 31, and the opposite side is provided with a mounting protrusion 333, and the support member 60 is provided on the mounting protrusion 333.

[0095] In this embodiment, a mounting protrusion 333 is provided on the side of the second part 33 away from the foldable connection to the first part 31 in the width direction. This mounting protrusion 333 provides a mounting position and is less likely to interfere with the signal acquisition element 50, thus improving the ease of installation of the support 60. At the same time, it also allows for the full utilization of the space in the width direction of the second part 33, so that the overall volume of the insulating element 30 does not need to be large, thereby improving the compactness of the distribution between structures.

[0096] In one embodiment of this application, the support 60 is bonded to the first surface 313.

[0097] In this embodiment, the support member 60 is bonded to the first part 31 so that the support member 60 can be stably fixed in the required position so as to stably support the second part 33.

[0098] In one embodiment of this application, the support 60 is bonded to the second surface 331.

[0099] In this embodiment, the support member 60 is bonded to the second part 33 so that the second part 33 can be stably folded over the first part 31, so that the signal acquisition member 50 set on the second part 33 can work normally and stably, thereby improving the reliability of the battery device 100.

[0100] The support member 60 can be pre-attached to the second part 33 so that the second part 33 can be attached to the side of the first part 31 opposite to the battery cell 20 after folding. Of course, the support member 60 can also be pre-attached to the first part 31.

[0101] In one embodiment of this application, the support member 60 is made of an elastic material.

[0102] In this embodiment, the support member 60 is made of an elastic material, such as foam, rubber or silicone, so that it can undergo elastic deformation, thereby buffering the folding of the second part 33 and reducing the possibility of damage to the signal acquisition member 50 or other components caused by folding collision.

[0103] In one embodiment of this application, there are multiple support members 60, arranged along the third direction Z, so that they can provide support and cushioning at various points along the length of the second part 33. The number of support members 60 may correspond to the number of mounting protrusions 333 described above.

[0104] Please refer to the reference. Figure 4 , Figure 10 as well as Figure 13 In one embodiment of this application, there are multiple busbars 40, each of which extends along the second direction Y, and the multiple busbars 40 are arranged side by side with intervals.

[0105] In this embodiment, each busbar 40 is configured to extend along the second direction Y, such that each busbar 40 can be positioned close to the second portion 33 at one end in the second direction Y, facilitating electrical connection between the signal acquisition unit 50 on the second portion 33 and each busbar 40. Furthermore, the elongated shape of the busbar 40 reduces the required number of busbars 40, enabling series and / or parallel connections between battery cells 20. For example, in the same battery pack 20B, the positive terminals 21a of all battery cells 20 can be connected in parallel through one busbar 40, and the negative terminals 21a can be connected in parallel through another busbar 40. In two adjacent battery packs 20B, one busbar 40 can be configured, with one edge used to connect the positive terminals 21a of one battery pack 20B in parallel, the other edge used to connect the negative terminals 21a of the other battery pack 20B in parallel, and the middle portion used to connect the two adjacent battery packs 20B in series.

[0106] In one embodiment of this application, there are two insulating elements 30, and the busbar 40 and the signal acquisition element 50 are disposed between the two insulating elements 30.

[0107] In this embodiment, the two insulating components 30 can be arranged along the first direction X, and the busbar 40 and the signal acquisition component 50 are arranged between the two opposing insulating components 30, so that the busbar 40 and the signal acquisition component 50 can play a more stable supporting role; at the same time, it can also better insulate against the high temperature during the welding process of the busbar 40 and the pole 21a, and reduce the impact on the signal acquisition component 50.

[0108] Please refer to the reference. Figure 2 ,as well as Figures 4 to 14In one embodiment of this application, the battery device 100 includes a battery cell assembly 20A, an insulator 30, a busbar 40, and a signal acquisition device 50. The battery cell assembly 20A includes multiple battery cells 20. The insulator 30 includes a first portion 31 and a second portion 33. The first portion 31 is disposed on one side of the battery cell assembly 20A in a first direction X. The second portion 33 is foldably connected to at least one side of the first portion 31 in a second direction Y and is stacked on the side of the first portion 31 facing away from the battery cell assembly 20A. The second direction Y intersects with the first direction X. The busbar 40 is disposed on the first portion 31 and configured to electrically connect at least two battery cells 20. The signal acquisition device 50 is disposed on the second portion 33 and configured to acquire voltage and temperature signals of the battery cells 20. The insulator 30 also includes a third portion 35, with opposite sides of the third portion 35 connected to the first portion 31 and the second portion 33, respectively. The third portion 35 is made of a flexible material, and the second portion 33 is foldably connected to the first portion 31 through the third portion 35. The third part 35 is provided with a material reduction section 351, which includes a material reduction hole 353. Multiple material reduction sections 351 are arranged at intervals along the third direction Z, with the first direction X, the second direction Y, and the third direction Z intersecting in pairs. The first part 31 and the second part 33 are both made of flexible material, and the first part 31, the second part 33, and the third part 35 are configured as an integrally formed structure. The busbar 40 and the signal acquisition component 50 are located on the same side of the insulating component 30. The signal acquisition component 50 is a flexible circuit board 51, which includes a main board 511 and a first branch 513. The main board 511 is located in the second part 33; the first branch 513 is connected to one side of the main board 511 and is correspondingly arranged with the third part 35. The first branch 513 is electrically connected to the busbar 40. The flexible circuit board 51 also includes a second branch 515, which is connected to the side of the main board 511 away from the first branch 513; the second branch 515 is provided with a temperature sensor, which is thermally coupled to the busbar 40. The first part 31 has a first surface 313 facing away from the battery pack 20B, and the second part 33 has a second surface 331 facing the first surface 313; the busbar 40 is disposed on the first surface 313, and the signal acquisition device 50 is disposed on the second surface 331; the battery device 100 also includes a support member 60, which abuts against the first surface 313 and the second surface 331, and is staggered from the busbar 40 and the signal acquisition device 50, respectively. The support member 60 is bonded to the first surface 313 and the second surface 331, respectively; the support member 60 is made of an elastic material; there are multiple support members 60, which are arranged along the third direction Z. There are multiple busbars 40, which are arranged side by side with intervals, and each busbar 40 extends along the second direction Y.

[0109] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery cell assembly, wherein the battery cell assembly comprises a plurality of battery cells; An insulating component comprising a first portion and a second portion, the first portion being disposed on one side of the battery cell assembly in a first direction; the second portion being foldably connected to at least one side of the first portion in a second direction and stacked on the side of the first portion opposite to the battery cell assembly, the second direction intersecting the first direction. A busbar, wherein the busbar is disposed in the first portion and configured to electrically connect at least two of the battery cells; as well as A signal acquisition device is disposed in the second part and configured to acquire the voltage signal and / or temperature signal of the battery cell.

2. The battery device as claimed in claim 1, characterized in that, The insulating component further includes a third part, wherein the opposite sides of the third part are respectively connected to the first part and the second part; The third part is made of a flexible material, and the second part is foldably connected to the first part through the third part.

3. The battery device as claimed in claim 2, characterized in that, The third part is equipped with a material reduction section.

4. The battery device as claimed in claim 3, characterized in that, The material reduction section includes at least one of a material reduction hole and a material reduction groove; And / or, the number of the material reduction sections is multiple, and the multiple material reduction sections are arranged at intervals along a third direction, with the first direction, the second direction and the third direction intersecting each other.

5. The battery device as claimed in claim 2, characterized in that, The thickness of the third part is less than the thickness of the first part and the thickness of the second part, respectively.

6. The battery device as claimed in claim 2, characterized in that, The first part and the second part are both made of flexible materials, and the first part, the second part and the third part are configured as an integrally formed structure.

7. The battery device as claimed in claim 2, characterized in that, The busbar and the signal acquisition device are located on the same side of the insulating member. The signal acquisition device is a flexible circuit board, which includes: The main body plate, which is disposed in the second part; and The first branch is connected to one side of the main body plate and is correspondingly arranged with the third part. The first branch is electrically connected to the busbar.

8. The battery device as claimed in claim 7, characterized in that, The flexible circuit board further includes a second branch, which is connected to the side of the main board away from the first branch; The second branch is equipped with a temperature sensor, which is thermally coupled to the busbar.

9. The battery device according to any one of claims 1 to 8, characterized in that, The first portion has a first surface facing away from the battery pack, and the second portion has a second surface facing the first surface; The busbar is disposed on the first surface, and the signal acquisition device is disposed on the second surface; The battery device also includes a support member, which abuts against the first surface and the second surface, and is staggered from the busbar and the signal acquisition member, respectively.

10. The battery device as claimed in claim 9, characterized in that, The second part is foldably connected to the first part on one side, and a mounting protrusion is provided on the opposite side, and the support member is provided on the mounting protrusion; And / or, the support member is bonded to the first surface; And / or, the support member is bonded to the second surface; And / or, the support member is made of an elastic material.

11. The battery device according to any one of claims 1 to 8, characterized in that, The number of the busbars is multiple, and the multiple busbars are arranged side by side with intervals, with each busbar extending along the second direction.

12. The battery device according to any one of claims 1 to 8, characterized in that, The number of insulating components is two, and the busbar and the signal acquisition component are located between the two insulating components.

13. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 12.

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