Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a sampling assembly and at least one battery monomer, and the at least one battery monomer is conductively connected with the sampling assembly. The sampling assembly comprises a connecting section and a collecting section, the connecting section is provided with a plugging terminal and a first terminal, and the plugging terminal is used for being connected with a battery management system; the collection section is provided with a second terminal close to the connection section, a third terminal far away from the connection section and at least one standby terminal located between the second terminal and the third terminal, the third terminal is conductively connected with the battery monomer, the second terminal is conductively connected with the first terminal, and the standby terminal can be conductively connected with the first terminal. According to the battery device, the connecting section can be independently replaced when the plug-in terminal breaks down, the maintenance difficulty and replacement cost of the sampling assembly are reduced, and the situation that the battery device is scrapped due to the fault of the sampling assembly is reduced.

Description

Technical Field

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

[0002] With the continuous development of battery technology, the reliability of battery devices has received widespread attention. Related technologies typically incorporate sampling components within the battery device to collect data from each individual battery cell, thereby enabling monitoring of the battery device's operational status.

[0003] In actual use, the sampling components are prone to failure and the replacement cost is high. In severe cases, it can even lead to the scrapping of the entire battery device. Utility Model Content

[0004] This application provides a battery device and an electrical device. The battery device can replace the connection section separately when the plug terminal fails, which reduces the maintenance difficulty and replacement cost of the sampling component and reduces the situation where the battery device is scrapped due to sampling component failure.

[0005] In a first aspect, this application provides a battery device, which includes a sampling component and at least one battery cell. The at least one battery cell is electrically connected to the sampling component. The sampling component includes a connection section and a collection section. The connection section is provided with a plug-in terminal and a first terminal. The plug-in terminal is used to connect to a battery management system. The collection section is provided with a second terminal near the connection section, a third terminal away from the connection section, and at least one spare terminal located between the second terminal and the third terminal. The second terminal is electrically connected to the first terminal, the third terminal is electrically connected to the battery cell, and the spare terminal is electrically connected to the first terminal.

[0006] The battery device in this embodiment monitors parameters of each battery cell by using a sampling component. The sampling component separates a connection segment for connecting to the battery management system from a collection segment for connecting to the battery cells. The connection segment and the collection segment are electrically connected via a first terminal and a second terminal. When the sampling component malfunctions, such as due to corrosion or misalignment of the connectors, the battery device can replace the connection segment individually. This connection segment is electrically connected to the collection segment via a spare terminal, allowing the sampling component to be put back into use. This reduces the replacement cost of the sampling component and minimizes the possibility of the battery device being rendered unusable due to sampling component failure.

[0007] In some embodiments, the connecting segment includes two first substrate layers and a first line sandwiched between the two first substrate layers. The plug-in terminal is electrically connected to the first terminal through the first line, and a first hole is provided in the first substrate facing the acquisition segment to expose the first terminal.

[0008] In these alternative embodiments, the acquisition segment is electrically connected to the first terminal through the first hole, and is connected to the battery management system through the first line and the plug-in terminal to realize the acquisition of information of the battery cell. The first line is covered by two layers of the first substrate to meet the insulation performance.

[0009] In some embodiments, the connecting section is further provided with a fuse, the overcurrent capacity of which is lower than that of the first line, the fuse is electrically connected to the first terminal, and the fuse is located on the side of the first terminal away from the acquisition section.

[0010] In these alternative embodiments, when the battery device experiences a circuit malfunction or carries an excessive current, the fuse can fail before the first circuit to block the continued transmission of the large current to the sampling section and its impact on the battery cells. The sampling component can replace the connection section to restore the normal use of the sampling component and the battery device, thereby improving the reliability of the battery device.

[0011] In some embodiments, a fusible link is disposed on the first circuit, the fusible link is made of the same material as the first circuit, and the cross-sectional area of ​​the fusible link is smaller than the cross-sectional area of ​​the first circuit.

[0012] In these alternative embodiments, the overcurrent capacity of the fuse is lower than that of the first circuit so that the fuse can fail first when subjected to excessive current. The fuse can be obtained during the fabrication of the first circuit by processes such as etching to reduce the difficulty of the process and save the process time.

[0013] In some embodiments, the fuse is located between the plug terminal and the first line.

[0014] In these alternative embodiments, the fuse is separately disposed between the plug terminal and the first line, so that the fuse can be replaced separately when it fails, thereby further reducing the maintenance cost of the sampling component.

[0015] In some embodiments, the fuse is located between the first line and the first terminal.

[0016] In these alternative embodiments, the fuse is separately disposed between the first line and the first terminal, so that when the fuse fails, it can be replaced separately without replacing the entire connection section to restore the normal use of the sampling component.

[0017] In some embodiments, the acquisition segment includes two layers of second substrate and a second line sandwiched between the two layers of second substrate. The second terminal and the third terminal are electrically connected through the second line. A second hole is provided in the second substrate facing the connection segment to expose the second terminal.

[0018] In these alternative embodiments, target information of the battery cell, such as temperature, can be transmitted to the connection segment via a second line and a second terminal for acquisition. The second line and the second terminal are covered by two layers of a second substrate to meet insulation requirements. The second substrate is partially perforated to expose the second terminal so as to achieve a conductive connection with the first terminal.

[0019] In some embodiments, a spare terminal is provided on the second line, and the side of the spare terminal facing the connection segment is covered with a protective layer.

[0020] In these alternative embodiments, the protective layer can provide insulation coverage when the backup terminal is not in use, thereby reducing the probability of an unexpected connection between the first terminal and the backup terminal causing a short circuit in the second terminal.

[0021] In some embodiments, the distance between the second terminal and the spare terminal is greater than or equal to 5 mm.

[0022] In these alternative embodiments, the spare terminal can be spaced apart from the conductor, such as solder paste, between the first and second terminals to reduce potential misconduction between the spare terminal and the conductor.

[0023] In some embodiments, the distance between the second terminal and the spare terminal is less than or equal to 10 mm.

[0024] In these alternative embodiments, there is a suitable spacing between the second terminal and the spare terminal to control the area of ​​the sampling segment along its own length, thereby reducing the space occupied by the sampling component in the battery device and helping to improve the integration of the battery device.

[0025] In some embodiments, the first terminal is thermo-pressed and soldered to the second terminal, or the first terminal is thermo-pressed and soldered to a spare terminal.

[0026] In these alternative embodiments, the first terminal and the acquisition segment are connected by thermoforming soldering to obtain better soldering quality and more relaxed process conditions, so as to facilitate the rework of the sampling component.

[0027] Secondly, this application provides an electrical device, which includes the battery device provided in any of the foregoing embodiments, and the battery device is used to provide electrical energy. Attached Figure Description

[0028] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the structure of an electrical device according to an embodiment of this application;

[0030] Figure 2This is a schematic diagram of the structure of a battery device according to an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a battery cell pack according to an embodiment of this application;

[0032] Figure 4 This is a connection diagram of a battery device according to an embodiment of this application;

[0033] Figure 5 for Figure 4 A schematic diagram of the sampling component in the battery device shown;

[0034] Figure 6 for Figure 5 The diagram shows the structural diagram of the connection segment in the sampling component.

[0035] Figure 7 for Figure 5 The diagram shows the structure of the acquisition segment in the sampling component.

[0036] The accompanying drawings are not necessarily drawn to scale.

[0037] The specific marking information in the attached diagram is as follows:

[0038] 1000, vehicles;

[0039] 100. Battery assembly; 200. Controller; 300. Motor;

[0040] 10. Housing; 11. First housing section; 12. Second housing section; 20. Battery cell assembly; 21. Battery cell; 22. Busbar; 30. Sampling assembly;

[0041] 31. Connecting section; 311. Plug-in terminal; 312. First terminal; 313. First substrate; 314. First circuit; 315. Fuse; 316. Fixing part;

[0042] 32. Acquisition section; 321. Second terminal; 322. Third terminal; 323. Spare terminal; 324. Second substrate; 325. Second circuit. Detailed Implementation

[0043] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0045] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0048] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0049] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0050] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0051] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0052] With the continuous development of battery technology, the reliability of battery devices has received widespread attention. In related technologies, battery devices comprise multiple individual battery cells, and sampling components are installed within the device to collect data from each cell. Simultaneously, the sampling components are connected to an external battery management system to process the collected data, thereby enabling the monitoring of the battery device's operational status.

[0053] However, in actual use, the sampling components are prone to failure. For example, the sampling components may corrode and rust, or have damaged casings, in harsh storage environments. Because the sampling components are mostly fixedly connected to the battery cells without being detachable, repairing the sampling components is difficult and costly, and in severe cases, it can even lead to the scrapping of the entire battery device.

[0054] To address the aforementioned issues, this application provides a battery device that divides a sampling component into a connection section and a data acquisition section. The connection section is used to connect to an external battery management system, while the data acquisition section is used to acquire target information from individual battery cells. The connection section and the data acquisition section are electrically connected to achieve information acquisition. The data acquisition section is equipped with a spare terminal. When the connection section fails, the sampling component can replace the connection section independently and restore the conductive connection to the data acquisition section through the spare terminal, reducing the repair cost of the sampling component while ensuring the continued normal operation of the battery device.

[0055] The solutions in this application can be applied to battery devices, but are not limited to, electrical devices that include battery devices.

[0056] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0057] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0058] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments 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 provided 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 starting, navigation, and driving.

[0059] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0060] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell groups 20 for providing voltage and capacity. A battery cell group may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0061] In some embodiments, a battery cell group is typically formed by arranging multiple battery cells; as an example, a battery cell group can be a battery module, which is formed by arranging and fixing multiple battery cells to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0062] In some embodiments, the battery device 100 may be a battery pack, which includes a housing and one or more battery cell groups 20 housed in the housing.

[0063] Please see Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell pack 20, the battery cell pack 20 being housed within the housing 10.

[0064] The housing 10 is used to house individual battery cells, and the housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing portion 11 and a second housing portion 12, which overlap each other, and together define a receiving portion for housing the battery cell assembly 20. The second housing portion 12 may be a hollow structure with one end open, and the first housing portion 11 may be a plate-like structure, with the first housing portion 11 covering the open side of the second housing portion 12 to form a housing 10 with a receiving portion; alternatively, the first housing portion 11 and the second housing portion 12 may both be hollow structures with one side open, with the open side of the first housing portion 11 covering the open side of the second housing portion 12 to form a housing 10 with a receiving portion. Of course, the first housing portion 11 and the second housing portion 12 can have various shapes, such as cylinders, cuboids, etc.

[0065] As an example, the battery cell pack 20 can be a battery module, which can be housed in the housing by fixing the battery module in the housing.

[0066] As an example, the battery cell pack 20 can also be housed in the housing by directly fixing multiple battery cells to the housing.

[0067] In some embodiments, the housing may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing may be at least a portion of the floor of the vehicle 1000, or a portion of the housing may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0068] In some embodiments, the battery device 100 may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0069] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell pack 20 provided in an embodiment of this application. The battery cell pack 20 includes multiple battery cells 21, which are first connected in series, parallel, or mixed to form the battery cell pack 20, and then the battery cell pack 20 is housed in a casing.

[0070] As an example, the battery cell 21 can be a cylindrical battery cell 21, a prismatic battery cell 21, a pouch battery cell 21, or a battery cell 21 of other shapes, but is not limited thereto. Prismatic battery cells 21 include prismatic battery cells 21, blade-shaped battery cells 21, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0071] Please see Figures 4 to 7 , Figure 4 This is a connection diagram of a battery device according to an embodiment of this application. Figure 5 for Figure 4 The diagram shows the structure of the sampling component in the battery device. Figure 6 for Figure 5 The diagram shows the structure of the connection segment in the sampling component. Figure 7 for Figure 5 The diagram shows the structure of the acquisition segment in the sampling component.

[0072] This application provides a battery device, see embodiments thereof. Figure 4 and Figure 5 The battery device includes a sampling component 30 and at least one battery cell 21, with the at least one battery cell 21 being electrically connected to the sampling component 30. The sampling component 30 includes a connection section 31 and a collection section 32. The connection section 31 is provided with a plug-in terminal 311 and a first terminal 312, the plug-in terminal 311 being used to connect to a battery management system. The collection section 32 is provided with a second terminal 321 near the connection section 31, a third terminal 322 away from the connection section 31, and at least one spare terminal 323 located between the second terminal 321 and the third terminal 322. The third terminal 322 is electrically connected to the battery cell 21, the second terminal 321 is electrically connected to the first terminal 312, and the spare terminal 323 is capable of being electrically connected to the first terminal 312.

[0073] The connector 311 refers to an electronic component used to connect the sampling assembly 30 to the battery management system. For example, the connector 311 is in a dual in-line package and has metal pins for conductive connection with the battery management system; alternatively, the connector 311 includes a wiring harness through which the sampling assembly 30 docks with the battery management system.

[0074] Optionally, in some embodiments, the battery device further includes a busbar 22 for enabling conductive connections between different battery cells 21 to integrate current. The battery cells 21 are conductively connected to a third terminal 322 via the busbar 22. Exemplarily, the busbar 22 is a battery pack.

[0075] Therefore, the battery device divides the sampling component 30 into a connection section 31 and a collection section 32. When the plug-in terminal 311 fails under harsh conditions, such as corrosion, misalignment, or damage to the casing affecting insulation, the sampling component 30 can replace the connection section 31 independently. The replaced connection section 31 can then be electrically connected to the collection section 32 via the spare terminal 323 to ensure normal operation of the battery device. On the one hand, the sampling component 30 can replace only the faulty connection section 31, reducing repair costs; on the other hand, the battery device can still be used normally and perform status monitoring, reducing the possibility of the entire battery device being scrapped due to a failure of the sampling component 30.

[0076] In some embodiments of this application, the connecting segment 31 includes two layers of first substrate 313 and a first line 314 sandwiched between the two layers of first substrate 313. The plug-in terminal 311 and the first terminal 312 are electrically connected through the first line 314. A first hole is opened in the first substrate 313 facing the acquisition segment 32 to expose the first terminal 312.

[0077] It should be understood that the first substrate 313 is an insulating material. Optionally, the first substrate 313 is made of a flexible insulating material to enable the connecting section 31 to deform and adapt to the displacement of the battery cell 21 or other components within the battery device. Exemplarily, the first substrate 313 includes at least one of polyimide, polyethylene terephthalate, or polyolefin materials.

[0078] Optionally, the first line 314 includes a copper substrate, or the first line 314 includes an aluminum substrate.

[0079] Optionally, the first terminal 312 is configured as a pad, and the first substrate 313 has an opening on the side covering the pad and facing the acquisition segment 32, so that the pad is exposed and can be soldered to the second terminal 321 or the spare terminal 323 for conduction.

[0080] Optionally, the first terminal 312 is configured as conductive adhesive or conductive ink, and the first substrate 313 has an opening on the side covering the first terminal 312 and facing the acquisition segment 32 to expose the conductive adhesive or conductive ink and make conductive connection with the second terminal 321 or the spare terminal 323.

[0081] Alternatively, in some embodiments, please continue to refer to Figure 6 The connecting section 31 also includes a fixing part 316, which connects the connecting section 31 to other components in the battery device, such as end plates, to enable the installation of the connecting section 31 to other components in the battery device, excluding the battery cell 21.

[0082] Therefore, the acquisition segment 32 can be electrically connected to the first terminal 312 through the first hole, and then connected to the battery management system through the first line 314 and the plug-in terminal 311 to realize the acquisition of information from the battery cell 21. The first line 314 and the first terminal 312 are covered by two layers of first substrate 313 to improve the insulation performance of the sampling component 30 and reduce the probability of false communication between the first line 314 or the first terminal 312 and the battery cell 21.

[0083] In some embodiments of this application, the connecting section 31 is further provided with a fuse part 315. The current-carrying capacity of the fuse part 315 is lower than that of the first line 314. The fuse part 315 is electrically connected to the first terminal 312, and the fuse part 315 is located on the side of the first terminal 312 away from the acquisition section 32.

[0084] The fuse 315 is a component that can melt and cut off the circuit when the current intensity exceeds its own load capacity due to the accumulation of a large amount of concentrated heat.

[0085] Therefore, when the battery device experiences a circuit malfunction or carries an excessive current, the fuse 315 can fail before the first circuit 314, thereby preventing the large current from continuing to flow to the acquisition section 32 and affecting the battery cell 21. After the fuse 315 fails, the sampling assembly 30 can be individually replaced with the connecting section 31 and electrically connected to the acquisition section 32 via the spare terminal 323 to restore the normal operation of the sampling assembly 30 and the battery device. The fuse 315 can be replaced by replacing the connecting section 31 to improve the reliability of the battery device.

[0086] Please see Figure 6 In some embodiments of this application, the fuse portion 315 is disposed on the first line 314, the fuse portion 315 is made of the same material as the first line 314, and the cross-sectional area of ​​the fuse portion 315 is smaller than the cross-sectional area of ​​the first line 314.

[0087] Optionally, the fused portion 315 is formed by etching process to reduce the manufacturing difficulty of the fused portion 315.

[0088] Therefore, the fuse part 315 can be directly fabricated based on the first line 314 without forming additional components that occupy the internal space of the sampling component 30 and the battery device, which is beneficial to the control of the process cost of the sampling component 30 and the improvement of the economic benefits of the battery device.

[0089] In some embodiments of this application, the fuse portion 315 is disposed between the plug terminal 311 and the first line 314.

[0090] Optionally, the fuse 315 is detachably connected to the plug terminal 311 and detachably connected to the first line 314, so that the fuse 315 can be replaced individually, further reducing the maintenance cost of the sampling assembly 30 and improving the reliability of the battery device.

[0091] Therefore, the fuse 315 can fuse and interrupt the transmission of high current between the transmission of high current to the first line 314, thereby further reducing the probability of failure of the acquisition section 32 and improving the reliability of the battery device.

[0092] In some embodiments of this application, the fuse portion 315 is disposed between the first line 314 and the first terminal 312.

[0093] Optionally, the fuse 315 is detachably connected to the first line 314 and detachably connected to the first terminal 312, so that the fuse 315 can be replaced individually.

[0094] Therefore, the fuse 315 can fail in time before the large current flows through the first terminal 312 to the acquisition section 32, reducing the possibility of the large current flowing to the battery cell 21 and causing failure or even thermal runaway, thus improving the reliability of the battery device.

[0095] In some embodiments of this application, the acquisition segment 32 includes two layers of second substrate 324 and a second line 325 sandwiched between the two layers of second substrate 324. The second terminal 321 and the third terminal 322 are electrically connected through the second line 325. A second hole is provided on the second substrate 324 facing the connection segment 31 to expose the second terminal 321.

[0096] It should be understood that the second substrate 324 is an insulating material. Optionally, the second substrate 324 is made of a flexible insulating material to enable the acquisition segment 32 to deform to accommodate the expansion or other possible deformations of the battery cell 21. Exemplarily, the second substrate 324 includes at least one of polyimide, polyethylene terephthalate, or polyolefin materials.

[0097] Optionally, the second line 325 includes a copper substrate, or the second line 325 includes an aluminum substrate.

[0098] Optionally, the second terminal 321 is configured as a pad, and the second substrate 324 has an opening on the side covering the pad and facing the connection segment 31, so that the pad is exposed and can be soldered to the first terminal 312 for conductivity.

[0099] Optionally, the second terminal 321 is configured as conductive adhesive or conductive ink, and the second substrate 324 has an opening on the side covering the second terminal 321 and facing the connecting segment 31 to expose the conductive adhesive or conductive ink and make contact with the first terminal 312 for conduction.

[0100] Thus, the connection segment 31 can be electrically connected to the acquisition segment 32 via the second terminal 321, and then connected to the battery cell 21 via the second line 325 and the third terminal 322 to obtain target information. The second line 325 and the second terminal 321 are covered by two layers of second substrate 324 to improve the insulation performance of the sampling component 30.

[0101] Please see Figure 7 In some embodiments of this application, a spare terminal 323 is disposed on the second line 325, and the side of the spare terminal 323 facing the connection section 31 is covered with a protective layer.

[0102] Optionally, the protective layer includes at least one of polyimide, polyethylene terephthalate, or polyolefin materials.

[0103] Optionally, the protective layer is made of the same material as the second substrate 324, or the material of the protective layer is different from that of the second substrate 324.

[0104] Optionally, the spare terminal 323 is configured as a solder pad.

[0105] Optionally, the spare terminal 323 is made of conductive adhesive.

[0106] Optionally, the spare terminal 323 is made of conductive ink.

[0107] Therefore, the protective layer can achieve insulation coverage of the spare terminal 323 when the first terminal 312 and the second terminal 321 are electrically connected, thereby reducing the probability that the second terminal 321 will be short-circuited due to an unexpected connection between the first terminal 312 and the spare terminal 323.

[0108] In some other embodiments of this application, the acquisition segment 32 further includes a third line sandwiched between two layers of second substrate 324, and the spare terminal 323 is electrically connected to the third terminal 322 through the third line to reduce the probability of unexpected conduction between the first terminal 312 and the spare terminal 323.

[0109] In some embodiments of this application, the distance between the second terminal 321 and the spare terminal 323 is greater than or equal to 5 mm.

[0110] The distance between the second terminal 321 and the spare terminal 323 refers to the shortest distance between the second terminal 321 and the spare terminal 323 in any direction.

[0111] Therefore, the spare terminal 323 can be spaced apart from the conductor, such as solder paste or conductive adhesive, between the first terminal 312 and the second terminal 321, so as to reduce the possible misconduct between the first terminal 312 and the spare terminal 323 through the conductor, reduce the probability of the second terminal 321 being short-circuited, and improve the reliability of the battery device.

[0112] In some embodiments of this application, the distance between the second terminal 321 and the spare terminal 323 is less than or equal to 10 mm.

[0113] Therefore, the second terminal 321 and the spare terminal 323 have a suitable spacing distance to control the area of ​​the sampling section 32 in its own length direction, thereby reducing the space occupied by the sampling component 30 in the battery device, which helps to improve the integration of the battery device and thus improve the economic efficiency of the battery device.

[0114] In some embodiments of this application, the first terminal 312 is hot-pressed and soldered to the second terminal 321, or the first terminal 312 is hot-pressed and soldered to the spare terminal 323.

[0115] In some other embodiments of this application, the first terminal 312 and the second terminal 321 are connected by partial welding, or the first terminal 312 and the spare terminal 323 are connected by partial welding.

[0116] The sampling component 30 has many fixing points after being connected to the battery cell 21, making disassembly and assembly difficult. The resulting whole assembly is difficult to withstand the high temperature and high pressure conditions of reflow soldering. Therefore, when the connection segment 31 fails and needs to be replaced, the new connection segment 31 and the spare terminal 323 can be electrically connected through hot-press soldering or partial soldering to obtain better soldering quality, provide more relaxed process conditions, and facilitate the repair of the sampling component 30.

[0117] Please see Figures 4 to 7 This application provides a battery device, which includes a sampling component 30 and a plurality of battery cells 21. A plurality of busbars 22 are provided between the plurality of battery cells 21. The sampling component 30 includes a connection section 31 and a collection section 32. The connection section 31 is provided with a plug-in terminal 311 and a first terminal 312. The sampling component 30 is connected to a battery management system through the plug-in terminal 311. The collection section 32 is provided with a second terminal 321, a third terminal 322 and at least one spare terminal 323 located between the second terminal 321 and the third terminal 322. The third terminal 322 is electrically connected to the busbars 22, and the second terminal 321 is electrically connected to the first terminal 312 to realize the collection of information of the battery cells 21.

[0118] Please see Figure 6The plug-in terminal 311 and the first terminal 312 are electrically connected through a first line 314, and the first line 314 is provided with a fuse part 315. The connecting section 31 is also provided with a first substrate 313 and a fixing part 316. The first substrate 313 is used to support the plug-in terminal 311, the first terminal 312 and the first line 314, and is installed and fixed to the components in the battery device other than the battery cell 21 through the fixing part 316.

[0119] Please see Figure 7 The second terminal 321 and the third terminal 322 are connected by a second line 325, and a spare terminal 323 is disposed on the second line 325. When the connection segment 31 fails, the sampling component 30 can replace the connection segment 31 with a new one. The new first terminal 312 can be electrically connected to the spare terminal 323 by hot-pressing soldering, thereby realizing the conductive connection between the connection segment 31 and the acquisition segment 32, and using the second line 325 to achieve the conductive connection with the third terminal 322 and the battery cell 21. The acquisition segment 32 is also provided with a second substrate 324, which is used to support the second terminal 321, the spare terminal 323, the second line 325, and the third terminal 322.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, The sampling component includes a sampling assembly and at least one battery cell, wherein at least one battery cell is electrically connected to the sampling assembly, and the sampling assembly includes: The connecting section is provided with a plug-in terminal and a first terminal, wherein the plug-in terminal is used to connect to the battery management system; The acquisition section includes a second terminal near the connection section, a third terminal away from the connection section, and at least one spare terminal located between the second terminal and the third terminal. The second terminal is electrically connected to the first terminal, the third terminal is electrically connected to the battery cell, and the spare terminal is electrically connected to the first terminal.

2. The battery device according to claim 1, characterized in that, The connecting segment includes two layers of first substrate and a first line sandwiched between the two layers of first substrate. The plug-in terminal is electrically connected to the first terminal through the first line. A first hole is provided on the first substrate facing the acquisition segment to expose the first terminal.

3. The battery device according to claim 2, characterized in that, The connecting section is also provided with a fuse, the current-carrying capacity of which is lower than that of the first line. The fuse is electrically connected to the first terminal and is located on the side of the first terminal away from the acquisition section.

4. The battery device according to claim 3, characterized in that, The fusible link is disposed on the first line, the fusible link is made of the same material as the first line, and the cross-sectional area of ​​the fusible link is smaller than the cross-sectional area of ​​the first line.

5. The battery device according to claim 3, characterized in that, The fuse is located between the plug terminal and the first line.

6. The battery device according to claim 3, characterized in that, The fuse is located between the first line and the first terminal.

7. The battery device according to claim 2, characterized in that, The acquisition section includes two layers of second substrate and a second circuit sandwiched between the two layers of second substrate. The second terminal and the third terminal are electrically connected through the second circuit. A second hole is provided on the second substrate facing the connection section to expose the second terminal.

8. The battery device according to claim 7, characterized in that, The spare terminal is located on the second line, and the side of the spare terminal facing the connection segment is covered with a protective layer.

9. The battery device according to claim 8, characterized in that, The distance between the second terminal and the spare terminal is greater than or equal to 5 mm.

10. The battery device according to claim 8, characterized in that, The distance between the second terminal and the spare terminal is less than or equal to 10 mm.

11. The battery device according to claim 1, characterized in that, The first terminal is hot-pressed and soldered to the second terminal, or the first terminal is hot-pressed and soldered to the spare terminal.

12. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 11, the battery device being used to provide electrical energy.

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