CN220692285U - Power utilization device, battery and signal acquisition assembly thereof - Google Patents

Abstract

The application provides an electricity device, a battery and a signal acquisition component thereof, wherein the signal acquisition component is used for the battery and comprises an insulating piece, a thermosetting adhesive layer and a sampling circuit board; the thermosetting adhesive layer is coated on one side of the insulating piece; the sampling circuit board is connected with the insulating piece through the thermosetting adhesive layer in an adhesive mode, and the sampling circuit board is configured to be capable of collecting working parameters of the battery. The application provides a signal acquisition assembly has reduced the dust etc. and has attached on the thermosetting glue film and influence the risk of signal sampling assembly's sampling effect, is favorable to improving the accuracy of the single operating parameter of battery that signal acquisition assembly gathered, and then is favorable to improving the reliability of battery.

Description

Power utilization device, battery and signal acquisition assembly thereof

Technical Field

The application relates to the technical field of batteries, in particular to an electric device, a battery and a signal acquisition assembly thereof.

Background

Batteries are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like. The pressure release mechanism is used as an important structural component in the battery, when the thermal runaway risk of the battery occurs, the gas in the battery can be discharged through the opening of the pressure release mechanism, and the risk of explosion of the battery due to overhigh pressure is reduced.

In addition to improving the service performance of a battery, how to improve the reliability of a battery is also a problem to be considered in the development of battery technology. Therefore, how to reduce and improve the reliability of the battery is a continuous improvement in battery technology.

Disclosure of Invention

The embodiment of the application provides an electricity utilization device, a battery and a signal acquisition assembly thereof, which can improve the reliability of the battery.

In a first aspect, embodiments of the present application provide a signal acquisition assembly for a battery, the signal acquisition assembly including an insulating member, a thermosetting adhesive layer, and a sampling circuit board; the thermosetting adhesive layer is coated on one side of the insulating piece; the sampling circuit board is connected with the insulating piece through the thermosetting adhesive layer in an adhesive mode, and the sampling circuit board is configured to be capable of collecting working parameters of the battery.

The signal acquisition assembly that this embodiment provided, through setting up thermosetting glue film coating in one side of insulating part, the thermosetting glue film realizes the bonding connection of sampling circuit board and insulating part in the solidification process, and because thermosetting glue film solidification back no longer has the viscidity, has reduced the dust etc. and has attached on the thermosetting glue film and influence the risk of signal acquisition assembly's sampling effect, is favorable to improving the accuracy of the single operating parameter of battery that signal acquisition assembly gathered, and then is favorable to improving the reliability of battery.

In some embodiments, the thermoset adhesive layer is cured from one of a hot melt adhesive, an epoxy adhesive, a phenolic adhesive, an imino resin, and a polyurethane adhesive. Therefore, the process difficulty of the signal acquisition assembly can be reduced while the bonding connection of the sampling circuit board and the insulating piece, the difficulty of dust adhesion after solidification and molding and the like are realized.

In some embodiments, the signal acquisition assembly further includes a bus bar having a through hole, the bus bar covering the through hole, the through hole configured to be able to pass through an electrode terminal of a battery cell of the battery so that the bus bar is electrically connected with the electrode terminal. So set up, be favorable to improving the integrated level of battery inner structure, and then be favorable to improving the energy density of battery, and be convenient for realize electrode terminal or converging the piece and sampling circuit board's electricity and be connected to the information such as single voltage of battery, electric current or temperature is gathered to the sampling circuit board, is favorable to simplifying the inside connecting wire of battery.

In some embodiments, the signal acquisition assembly further comprises a first acquisition terminal, the sampling circuit board comprising a plurality of sampling harnesses, the first acquisition terminal being disposed between the bus member and the insulating member and being configured to electrically connect the bus member and at least a portion of the sampling harnesses. So set up, can utilize the insulating part to cover first acquisition terminal to provide certain insulating guard action to first acquisition terminal, and needn't be in addition on first acquisition terminal coating insulating glue etc. is favorable to simplifying signal acquisition assembly's structure and assembly process.

In some embodiments, the signal acquisition assembly further comprises a second acquisition terminal electrically connected to at least another portion of the sampling harness; the insulating piece is provided with a clearance hole, and the second acquisition terminal is used for penetrating through the clearance hole and abutting with a battery monomer of the battery so as to acquire temperature information of the battery monomer. The arrangement is convenient for realizing the acquisition of information such as the temperature of the battery monomer.

In some embodiments, the insulating member further has a weak portion disposed between two adjacent bus members and spaced apart from the sampling circuit board, the weak portion being configured to deform under the influence of an expansion force. So set up, under the scene that signal acquisition subassembly was applied to in the battery, under the single swelling of battery circumstances, can cushion the battery single to the expansion force of insulator through the deformation of weak portion to reduce the part of insulator with sampling circuit board contact and tear because of the single expansion force of battery, and then tear the risk of sampling circuit board.

In some embodiments, the weak portion is hollow, the weak portion includes an extension portion and an end portion, the extension portion extends along a first direction, the end portion is communicated with two ends of the extension portion along the first direction, a size of the end portion along a second direction is larger than a size of the extension portion along the second direction, and the first direction intersects with the second direction. Therefore, the maximum value of the deformation quantity of the weak part is favorably improved, and the risk of tearing the sampling circuit board caused by cracking of the insulating part is favorably reduced.

In some embodiments, a frangible portion is provided between any two bus members adjacent in the second direction. The arrangement is beneficial to further reducing the risk that the insulating piece is cracked due to the expansion of the battery monomer, and then the sampling circuit board is torn.

In some embodiments, the sampling circuit board includes a body portion and a bending portion, the body portion extends along a second direction and is connected with the insulating member through a thermosetting adhesive layer in an adhesive mode, the bending portion is bent towards the insulating member by at least one end of the body portion along the second direction, and a clearance opening is formed in a position, corresponding to the bending portion, of the insulating member along the second direction. Therefore, the risk that the insulating piece is damaged due to cutting of the bending part is reduced, and the reliability of the signal acquisition assembly is further improved.

In some embodiments, the insulator is in the form of a film, and the material of the insulator comprises polyethylene terephthalate. The insulation protection effect of the insulation part on the structures such as the battery monomer and the sampling circuit board is improved, the insulation part has certain structural strength, meanwhile, the space inside the battery occupied by the insulation part can be reduced, and the energy density of the battery is improved.

In some embodiments, the signal acquisition assembly further comprises a support member, the support member is adhesively connected to the insulating member by a thermosetting adhesive layer, and the support member is disposed between two adjacent sampling circuit boards to support the sampling circuit boards. The support piece can provide certain supporting role to the sampling circuit board, reduces the risk that the sampling circuit board warp, is favorable to improving the sampling accuracy of sampling circuit board.

In a second aspect, embodiments of the present application provide a battery, which includes the signal acquisition assembly provided in any of the embodiments above.

The battery provided in this embodiment of the present application has the same technical effects due to the adoption of the signal acquisition component provided in any one of the embodiments, and is not described herein again.

In a third aspect, an embodiment of the present application provides an electrical device, including a battery provided in the foregoing embodiment, where the battery is configured to provide electrical energy.

The power utilization device provided by the embodiment of the present application has the same technical effects due to the battery provided by the above embodiment, and is not described herein again.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a vehicle provided in an embodiment of the present application;

fig. 2 is a schematic structural view of a battery according to an embodiment of the present application;

fig. 3 is a schematic structural view of a battery module in a battery according to an embodiment of the present application;

fig. 4 is a schematic diagram of an exploded structure of a battery cell in the battery provided in the embodiment of the present application;

FIG. 5 is a front view of a signal acquisition assembly provided by an embodiment of the present application;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is a partial enlarged view at B in FIG. 5;

FIG. 8 is a schematic diagram of an exploded view of a signal acquisition assembly according to an embodiment of the present application;

FIG. 9 is a front view of an insulator in a signal acquisition assembly provided in an embodiment of the present application;

FIG. 10 is a front view of another signal acquisition assembly provided in an embodiment of the present application;

FIG. 11 is an enlarged view of a portion of FIG. 10 at C;

FIG. 12 is a schematic cross-sectional view of the structure of FIG. 11 taken along line N-N;

FIG. 13 is a schematic cross-sectional view of a sampling circuit board in a signal acquisition assembly according to an embodiment of the present application;

FIG. 14 is a schematic view of an exploded view of another signal acquisition assembly provided in an embodiment of the present application;

fig. 15 is a schematic view of another exploded structure of a battery provided in an embodiment of the present application.

In the drawings, the drawings are not necessarily to scale.

Marking:

1. a vehicle; 1a, a motor; 1b, a controller;

10. a battery; 11. a first box portion; 12. a second box portion;

20. a battery module;

30. a battery cell; 31. a housing; 31a, a receiving cavity; 311. a housing; 312. an end cap; 32. an electrode assembly; 33. an electrode terminal;

40. a signal acquisition assembly;

41. an insulating member; 41a, through holes; 41b, a clearance opening; 411. a weak portion; 411a, extension; 411b, end;

42. a thermosetting adhesive layer;

43. sampling a circuit board; 431. sampling a wire harness; 43a, a body part; 43b, a bending part;

44. a confluence member;

45. a first acquisition terminal;

46. a second acquisition terminal;

47. a support;

x, a first direction; y, second direction.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

The term "plurality" as used herein refers to more than two (including two).

In the present application, the battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells, or magnesium ion battery cells, and the embodiment of the present application is not limited thereto. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard.

The battery referred to in embodiments of the present application may include one or more battery cells to provide a single physical module of higher voltage and capacity. When a plurality of battery cells are provided, the plurality of battery cells are connected in series, in parallel or in series-parallel through the converging component.

In some embodiments, the battery may be a battery module; when a plurality of battery cells are provided, the plurality of battery cells are arranged and fixed to form a battery module.

In some embodiments, the battery may be a battery pack including a case and a battery cell, the battery cell or battery module being housed in the case.

In some embodiments, the tank may be part of the chassis structure of the vehicle. For example, a portion of the tank may become at least a portion of the floor of the vehicle, or a portion of the tank may become at least a portion of the cross member and the side member of the vehicle.

In some embodiments, the battery may be an energy storage device. The energy storage device comprises an energy storage container, an energy storage electric cabinet and the like.

The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge of the battery cell, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The isolating film is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through.

In the working process of the battery, the signal acquisition component is generally required to acquire working parameters such as current, voltage and temperature of the battery, which can reflect the working state of the battery, the signal acquisition component sends the acquired working information of the battery to the battery management system, and the battery management system can judge the working state of the battery according to the working parameters of the battery so that the battery management system can take measures such as power failure or pressure relief on the battery in time.

The signal acquisition assembly generally comprises a sampling circuit board and an insulating film, wherein an adhesive layer is arranged on the whole surface of one side, away from a battery unit of the battery, of the insulating film, and the sampling circuit board is in adhesive connection with the insulating film through the adhesive layer. However, in the related art, the adhesive layer is generally a thermoplastic adhesive, and at normal temperature, the adhesive layer has a certain viscosity, and external dust and the like fall into the adhesive layer and then adhere to the adhesive layer, so that the accuracy of the working parameters collected by the signal collection assembly can be affected, and the reliability of the battery is further affected.

In view of this, this application embodiment provides a technical scheme, it is through the one side coating thermosetting glue film at the insulating part to set up sampling circuit board and pass through thermosetting glue film and insulating part bonding connection, then thermosetting glue film no longer has the viscidity after the solidification, and magazines such as external dust fall behind the thermosetting glue film, can not adhere at the thermosetting glue film, so, is favorable to improving the accuracy of the operating parameter that the sampling subassembly gathered, is favorable to improving the reliability of battery.

The technical scheme described in the embodiment of the application is applicable to a signal acquisition assembly, a battery comprising the signal acquisition assembly and an electric device using the battery.

The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular.

For convenience of explanation, the following examples will be described taking an electric device as an example of a vehicle.

As shown in fig. 1, a battery 10 is provided inside a vehicle 1. The battery 10 may be provided at the bottom or the head or the tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, for example, the battery 10 may serve as an operating power source of the vehicle 1.

The vehicle 1 may further include a controller 1b and a motor 1a. The controller 1b is used to control the battery 10 to supply power to the motor 1a, for example, for operating power requirements at start-up, navigation and travel of the vehicle 1.

In some embodiments of the present application, the battery 10 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, providing driving power for the vehicle 1 instead of or in part instead of fuel oil or natural gas.

Referring to fig. 2, the battery 10 includes a battery cell (not shown in fig. 2). The battery 10 may further include a case for accommodating the battery cells.

The box is used for holding battery monomer, and the box can be multiple structural style. In some embodiments, the housing may include a first housing portion 11 and a second housing portion 12. The first housing part 11 and the second housing part 12 are mutually covered. The first and second casing parts 11 and 12 together define an accommodating space for accommodating the battery cells. The second case 12 may have a hollow structure with one end opened, the first case 11 has a plate-like structure, and the first case 11 is covered on the opening side of the second case 12 to form a case having an accommodation space; the first housing part 11 and the second housing part 12 may each have a hollow structure with one side opened. The open side of the first casing part 11 is closed to the open side of the second casing part 12 to form a casing having an accommodation space. Of course, the first and second case portions 11 and 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

In order to improve the sealing property after the first casing part 11 and the second casing part 12 are connected, a sealing member, such as a sealant, a sealing ring, or the like, may be further provided between the first casing part 11 and the second casing part 12.

Assuming that the first housing part 11 is covered with the second housing part 12, the first housing part 11 may also be referred to as an upper case cover, and the second housing part 12 may also be referred to as a lower case.

In the battery 10, the number of battery cells may be one or more. If the number of the battery cells is multiple, the battery cells can be connected in series, in parallel or in series-parallel. The series-parallel connection refers to that a plurality of battery monomers are connected in series or in parallel. The plurality of battery cells can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells is accommodated in the box body, or the plurality of battery cells can be connected in series or in parallel or in series-parallel to form the battery module 20. The plurality of battery modules 20 are then connected in series or parallel or a series-parallel combination to form a unit and are accommodated in a case.

As shown in fig. 3, in some embodiments, in the battery module 20, the battery cells 30 are plural. The plurality of battery cells 30 are first connected in series or parallel or a series-parallel combination to form the battery module 20. The plurality of battery modules 20 are then connected in series or parallel or a series-parallel combination to form a unit and are accommodated in a case.

In some embodiments, electrical connection between the plurality of battery cells 30 in the battery module 20 may be achieved through the bus bar 44 to achieve parallel or series-parallel connection of the plurality of battery cells 30 in the battery module 20.

The battery 10 may also have no case, but include a plurality of battery cells connected in series or parallel, and after the plurality of battery cells are connected in series or parallel, the battery cells are fixed by a structure such as a steel belt or a binding belt, and then a plurality of battery cells 10 are connected in series or parallel to form a new energy storage unit.

In some embodiments, electrical connection between the plurality of cells in the battery 10 may be achieved through the buss bar 44 to achieve parallel or series-parallel connection of the plurality of cells in the battery 10.

Referring to fig. 4, a battery cell 30 in a battery provided in an embodiment of the present application includes an electrode assembly 32 and a housing 31, the housing 31 has a receiving cavity 31a, and the electrode assembly 32 is received in the receiving cavity 31 a.

The case 31 may include a case 311 and an end cap 312, and when assembling the battery cell 30, the electrode assembly 32 may be first placed in the receiving chamber 31a, the end cap 312 is then capped on the case 311, and then an electrolyte is injected into the receiving chamber 31a through an electrolyte injection port on the end cap 312.

In some embodiments, the housing 31 may also be used to contain an electrolyte, such as an electrolyte. The housing 31 may take a variety of structural forms.

The housing 31 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc. The shape of the case 31 may be determined according to the specific shape of the electrode assembly 32. For example, if the electrode assembly 32 has a cylindrical structure, the case 31 may alternatively have a cylindrical structure. If the electrode assembly 32 has a rectangular parallelepiped structure, the case 31 may alternatively have a rectangular parallelepiped structure. In fig. 4, the case and the electrode assembly 32 are each exemplarily rectangular parallelepiped in structure.

The material of the housing 31 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., which is not particularly limited in the embodiment of the present application.

The electrode assembly 32 accommodated in the case 31 may be one or more. In fig. 4, the number of electrode assemblies 32 accommodated in the case 31 is two.

As shown in fig. 2, 4 and 5, a signal acquisition assembly 40 according to an embodiment of the present application is used for a battery 10, and the signal acquisition assembly 40 includes an insulating member 41, a thermosetting adhesive layer 42 and a sampling circuit board 43. The thermosetting adhesive layer 42 is coated on one side of the insulating member 41, and the sampling circuit board 43 is adhesively connected with the insulating member 41 through the thermosetting adhesive layer 42, and the sampling circuit board 43 is configured to be capable of collecting the working parameters of the battery 10.

The insulating member 41 may be in the form of a sheet, a plate, a film, or the like, and in the case where the signal acquisition assembly 40 is used in the battery 10, the insulating member 41 may be disposed between the sampling circuit board 43 and the battery cell 30 of the battery 10 to realize insulation of the battery cell 30 from the sampling circuit board 43.

The thermosetting adhesive layer 42 may be formed by curing after the insulating member 41 is coated with a liquid thermosetting adhesive. The thermosetting adhesive layer 42 is fluid in an initial state and has a certain viscosity. The thermosetting adhesive can be cured at normal temperature, and the cured thermosetting adhesive layer 42 is not sticky.

The thermosetting adhesive layer 42 is coated on one side of the insulating member 41, and then the thermosetting adhesive layer 42 may be entirely coated on one side of the insulating member 41, and in an initial state, the thermosetting adhesive layer 42 may be fluid and have a certain viscosity, and the sampling circuit board 43 and the like are placed on the thermosetting adhesive layer 42 having a certain viscosity and pressure is applied to the sampling circuit board 43 so that the sampling circuit board 43 is adhered to the insulating member 41 through the thermosetting adhesive layer 42. After the thermosetting adhesive layer 42 is cured and formed at normal temperature, the connection between the sampling circuit board 43 and the insulating member 41 can be firmly achieved, and the portion of the thermosetting adhesive layer 42 which is not bonded to the sampling circuit board 43 and the like is not tacky.

Thus, when the signal acquisition assembly 40 is applied to the battery 10, external dust and the like fall on the thermosetting adhesive layer 42, and are also difficult to attach to the thermosetting adhesive layer 42 for a long period of time.

The sampling circuit board 43 is configured to be capable of collecting the operating parameters of the battery 10, and optionally, the sampling circuit board 43 may collect the operating parameters of the battery 10, such as the current, voltage, air pressure, or temperature, related to the operation process. Specifically, the sampling circuit board 43 may be electrically connected to the electrode terminal 33 of the battery cell 30 through a connection terminal to collect the operating parameters such as the voltage or the current of the battery 10, or the sampling circuit board 43 may be disposed in contact with any portion of the battery cell 30 requiring temperature collection through a connection terminal to collect the temperature information of the battery cell 30 through the sampling circuit board 43. Of course, a sampling circuit board 43 may be provided for collecting other operating parameters of the battery 10.

The signal acquisition component 40 that this embodiment provided, through setting up thermosetting glue film 42 coating in one side of insulating part 41, thermosetting glue film 42 realizes the bonding connection of sampling circuit board 43 and insulating part 41 in the solidification in-process, and because thermosetting glue film 42 solidification back no longer has the viscidity, reduced the risk that dust etc. attached to on thermosetting glue film 42 and influence signal sampling component's sampling effect, be favorable to improving the accuracy of the operating parameter of the battery monomer 30 that signal acquisition component 40 gathered, and then be favorable to improving the reliability of battery 10.

In some embodiments, the thermoset adhesive layer 42 is cured from one of a hot melt adhesive, an epoxy adhesive, a phenolic adhesive, an imino resin, and a polyurethane adhesive.

The hot melt adhesive, the epoxy adhesive, the phenolic adhesive, the imino resin and the polyurethane adhesive are common thermosetting adhesives, are easy to obtain, have higher viscosity in liquid state, can be cured at normal temperature, and the thermosetting adhesive layer 42 formed after curing is not sticky.

Therefore, the thermosetting adhesive layer 42 is formed by curing the hot melt adhesive, the epoxy adhesive, the phenolic adhesive, the imino resin or the polyurethane adhesive, so that the process difficulty of the signal acquisition assembly 40 can be reduced while the bonding connection between the sampling circuit board 43 and the insulating member 41, the dust adhesion after the curing and forming, and the like are not easy to adhere.

As shown in fig. 5, 8 and 9, in some embodiments, the signal acquisition assembly 40 further includes a bus bar 44, the insulating member 41 having a through hole 41a, the bus bar 44 covering the through hole 41a, the through hole 41a being configured to be able to pass through the electrode terminal 33 of the battery cell 30 of the power supply 10 so that the bus bar 44 is electrically connected with the electrode terminal 33.

The electrode terminals 33 of the battery cells 30 are electrically connected to the bus bar 44 through the through holes 41a, and the bus bar 44 may be provided to be electrically connected to the electrode terminals 33 of the two battery cells 30, respectively, so that the series connection or parallel connection of the plurality of battery cells 30 inside the battery 10 is achieved through the bus bar 44.

Thus, the bus member 44 and the sampling circuit board 43 are adhered and connected to the same side of the insulating member 41 through the thermosetting adhesive layer 42, which is beneficial to improving the integration level of the internal structure of the battery 10. And the electrode terminal 33 passes through the through hole 41a of the insulating member 41, so that the electrode terminal 33 or the bus member 44 is conveniently electrically connected with the sampling circuit board 43, so that the sampling circuit board 43 can conveniently collect information such as voltage, current or temperature of the battery cell 30.

Therefore, the signal acquisition assembly 40 further includes the bus member 44, and the electrode terminal 33 is electrically connected with the bus member 44 through the through hole 41a of the insulating member 41, which is favorable for improving the integration level of the internal structure of the battery 10, further is favorable for improving the energy density of the battery 10, and is convenient for realizing the electrical connection between the electrode terminal 33 or the bus member 44 and the sampling circuit board 43, so that the sampling circuit board 43 can acquire the information such as the voltage, the current or the temperature of the battery cell 30, and is favorable for simplifying the connection circuit inside the battery 10.

As shown in fig. 10-13, in some embodiments, the signal acquisition assembly 40 further includes a first acquisition terminal 45, the sampling circuit board 43 includes a plurality of sampling harnesses 431, and the first acquisition terminal 45 is disposed between the bus member 44 and the insulating member 41 and is used to electrically connect the bus member 44 and at least a portion of the sampling harnesses 431.

The sampling circuit board 43 includes a plurality of sampling harnesses 431, and the plurality of sampling harnesses 431 may be disposed to be insulated from each other and electrically connected to related structures of the battery management system, respectively, to transmit a low voltage electrical signal to the battery management system through the sampling harnesses 431.

The first collecting terminal 45 may include a voltage collecting element or a current collecting element, etc., and the first collecting terminal 45 electrically connects the bus bar 44 and the sampling wire harness 431, and then the first collecting terminal 45 may be used to collect information such as voltage or current of the bus bar 44 and transmit to the battery management system through the sampling wire harness 431.

Since the first collecting terminal 45 is disposed between the bus member 44 and the insulating member 41, the insulating member 41 can be used to cover the first collecting terminal 45 to provide a certain insulation protection effect for the first collecting terminal 45, without coating insulating glue or the like on the first collecting terminal 45, which is beneficial to simplifying the structure of the signal collecting assembly 40 and the assembly process thereof.

As shown in fig. 14, in some embodiments, signal acquisition assembly 40 further includes a second acquisition terminal 46, second acquisition terminal 46 being electrically connected to at least a further portion of sampling harness 431. The insulating member 41 has a clearance hole, and the second collecting terminal 46 passes through the clearance hole and abuts against the battery cell 30 of the battery 10 to collect temperature information of the battery cell 30.

The second collecting terminal 46 is electrically connected with at least another part of the sampling wire bundles 431, and then the second collecting terminal 46 and the first collecting terminal 45 are electrically connected with different sampling wire bundles 431, respectively, so as to transmit different operating parameters of the battery 10 through the different sampling wire bundles 431.

The second collecting terminal 46 is abutted with the battery cell 30 through the clearance hole, and the second collecting terminal 46 can be a temperature collecting element or the like so as to collect information such as the temperature of the battery cell 30.

Therefore, the signal acquisition assembly 40 further includes a second acquisition terminal 46, where the second acquisition terminal 46 passes through the clearance hole of the insulating member 41, abuts against the battery cell 30, and is electrically connected with the sampling harness 431, so as to acquire information such as the temperature of the battery cell 30.

As shown in fig. 5 and 6, in some embodiments, the insulating member 41 further has a weak portion 411, and the weak portion 411 is disposed between two adjacent bus members 44 and spaced apart from the sampling circuit board 43, and the weak portion 411 is configured to be deformable under the action of an expansion force.

Under the scene that signal acquisition assembly 40 is applied to in battery 10, insulating part 41 can laminate with battery cell 30, and battery cell 30 can inevitably produce certain inflation in cyclic charge-discharge's in-process, so, produces certain inflation power to insulating part 41, and insulating part 41 has the risk of fracture, and insulating part 41's fracture has the risk of tearing sampling pencil 431.

And set up the weak portion 411 to set up the weak portion 411 and can produce deformation under the effect of receiving the inflation power, then at the in-process of battery cell 30 inflation, can absorb the inflation of battery cell 30 through the deformation of weak portion 411, because the weak portion 411 sets up with sampling circuit board 43 interval, then the deformation of weak portion 411 can not produce the damage to sampling circuit board 43.

Alternatively, the weakened portion 411 may be a structure in which the structural strength of the insulating member 41 is weak, and the weakened portion 411 is torn first when the insulating member 41 is subjected to the expansion force. Alternatively, the weak portion 411 may be provided with a hollow hole on the insulating member 41, and the hollow hole of the weak portion 411 is enlarged when the insulating member 41 is subjected to the expansion force, so as to buffer the expansion force applied to the insulating member 41.

Therefore, the insulating member 41 is provided with the weak portion 411, the weak portion 411 is arranged at intervals with the sampling circuit board 43, the weak portion 411 can deform under the action of expansion force, and when the battery cell 30 expands in the scene that the signal acquisition assembly 40 is applied to the battery 10, the expansion force of the battery cell 30 to the insulating member 41 can be buffered through the deformation of the weak portion 411, so that the risk that the part of the insulating member 41 in contact with the sampling circuit board 43 is torn due to the expansion force of the battery cell 30, and then the sampling circuit board 43 is torn is reduced.

As shown in fig. 5 and 6, in some embodiments, the weak portion 411 is hollowed out, and the weak portion 411 includes an extension portion 411a and an end portion 411b, the extension portion 411a extends along a first direction X, the end portion 411b is connected to two ends of the extension portion 411a along the first direction X, a dimension of the end portion 411b along a second direction Y is greater than a dimension of the extension portion 411a along the second direction Y, and the first direction X intersects the second direction Y.

The weak portion 411 is hollow, and the weak portion 411 may be a hole structure formed by removing material from the insulating member 41. The weak portion 411 includes an extension portion 411a and an end portion 411b, the extension portion 411a extends along the first direction X, and then the extension portion 411a may be elongated, and the size of the end portion 411b along the second direction Y is greater than the size of the extension portion 411a along the second direction Y, so that in the process of deforming the weak portion 411 due to expansion of the battery cell 30, the extension portion 411a may deform along the second direction Y and have a larger allowable deformation, which is beneficial to increasing the maximum value of the deformation amount of the weak portion 411, and further to reducing the risk of tearing the sampling circuit board 43 caused by cracking of the insulating member 41.

As shown in fig. 5, in some embodiments, a weakened portion 411 is provided between any two of the bus pieces 44 adjacent in the second direction Y.

In this way, in the process of expanding any battery cell 30, the expansion force of the battery cell 30 can be buffered through the deformation of the weak part 411 which is closer to the battery cell, which is beneficial to further reducing the risk that the insulating member 41 is cracked due to the expansion of the battery cell 30, and then the sampling circuit board 43 is torn.

As shown in fig. 5, 7 and 9, in some embodiments, the sampling circuit board 43 includes a body portion 43a and a bending portion 43b, where the body portion 43a extends along the second direction Y and is adhesively connected with the insulating member 41 through the thermosetting adhesive layer 42, the bending portion 43b is bent toward the insulating member 41 from at least one end of the body portion 43a along the second direction Y, and the insulating member 41 has a clearance opening 41b corresponding to the bending portion 43b along the second direction Y.

The body portion 43a extends along the second direction Y, and the bending portion 43b is bent from at least one end of the body portion 43a along the second direction Y toward the insulating member 41, so that the electric signal collected by the sampling circuit board 43 can be transmitted to the battery management system by electrically connecting the bending portion 43b to the battery management system of the battery 10.

When the insulating material 41 has the clearance opening 41b along the second direction Y at a position corresponding to the bent portion 43b, the clearance opening 41b of the insulating material 41 covers the bent portion 43b along the second direction Y.

It will be appreciated that, during the use of the battery 10, vibrations and the like will inevitably occur, and the vibrations of the battery 10 will drive the sampling circuit board 43 to displace relative to the insulating member 41, and by providing the insulating member 41 with a clearance opening 41b at a portion opposite to the bending portion 43b, the risk of the sampling assembly tearing the insulating member 41 is reduced.

Therefore, by providing the insulating member 41 with the clearance opening 41b along the second direction Y corresponding to the bent portion 43b, the risk of damage to the insulating member 41 caused by cutting the bent portion 43b is reduced, and the reliability of the signal acquisition assembly 40 is further improved.

In some embodiments, the insulator 41 is in the form of a film, and the material of the insulator 41 comprises polyethylene terephthalate (Polyethylene terephthalate, PET).

It can be appreciated that PET has better insulating properties, and the material that sets up insulating part 41 includes PET, is favorable to improving insulating protection effect of insulating part 41 to structures such as battery cell 30 and sampling circuit board 43, and PET has higher structural strength, sets up insulating part 41 and is membranous, when making insulating part 41 have certain structural strength, can also reduce the inside space of battery 10 that insulating part 41 occupy, is favorable to improving the energy density of battery 10.

As shown in fig. 5, 8 and 10, in some embodiments, the signal acquisition assembly 40 further includes a support member 47, where the support member 47 is adhesively connected to the insulating member 41 by a thermosetting adhesive layer 42, and the support member 47 is disposed between two adjacent sampling circuit boards 43 to support the sampling circuit boards 43.

The supporting member 47 is also adhered to the insulating member 41 by an adhesive layer, and after the adhesive layer is coated on the insulating member 41, the supporting member 47 and the sampling circuit board 43 can be placed on the adhesive layer together, and pressure is applied, so that the supporting member 47 and the sampling circuit board 43 are adhered to the insulating member 41 together by the thermosetting adhesive layer 42 in the curing process of the thermosetting adhesive layer 42.

The support piece 47 can strengthen the overall structural strength of the signal acquisition assembly 40, and because the support piece 47 is arranged between two adjacent sampling circuit boards 43, the support piece 47 can provide a certain supporting effect for the sampling circuit boards 43, the risk of deformation of the sampling circuit boards 43 is reduced, and the sampling accuracy of the sampling circuit boards 43 is improved.

As shown in fig. 15, the battery 10 provided according to an embodiment of the present application includes the signal acquisition assembly 40 provided by any of the embodiments described above.

The battery 10 provided in the embodiment of the present application has the same technical effects due to the signal acquisition component 40 provided in any embodiment of the present application, and will not be described herein again.

The power utilization device provided according to the embodiment of the present application includes the battery 10 provided in the above embodiment, and the battery 10 is used for providing electric energy.

The power consumption device provided in the embodiment of the present application has the same technical effects due to the battery 10 provided in the embodiment of the present application, and will not be described in detail herein.

As shown in fig. 5-15, in some embodiments, the signal acquisition assembly 40 includes an insulator 41, a thermoset adhesive layer 42, a sampling circuit board 43, a bus 44, a first acquisition terminal 45, a second acquisition terminal 46, and a support 47. The thermosetting adhesive layer 42 is coated on one side of the insulating member 41, and the thermosetting adhesive layer 42 may be cured and formed of a hot melt adhesive, an epoxy adhesive, a phenolic adhesive, an imino resin, or a polyurethane adhesive. The sampling circuit board 43 is adhesively connected with the insulating member 41 through the thermosetting adhesive layer 42, and the sampling circuit board 43 is configured to be able to collect the operating parameters of the battery 10. The insulating member 41 has a through hole 41a, and the bus bar 44 covers the through hole 41a, and the through hole 41a is configured to be able to pass through the electrode terminal 33 of the battery cell 30 of the power supply 10 so that the bus bar 44 is electrically connected with the electrode terminal 33. The sampling circuit board 43 includes a plurality of sampling harnesses 431, the first sampling terminal 45 is disposed between the bus member 44 and the insulating member 41, and is used for electrically connecting the bus member 44 and at least part of the sampling harnesses 431, and the second sampling terminal 46 is electrically connected with at least another part of the sampling harnesses 431. The insulating member 41 has a clearance hole, and the second collecting terminal 46 is used for penetrating through the clearance hole and abutting against the battery cell 30 of the battery 10 to collect temperature information of the battery cell 30. The supporting member 47 is adhesively connected with the insulating member 41 through the thermosetting adhesive layer 42, and the supporting member 47 is disposed between two adjacent sampling circuit boards 43 to support the sampling circuit boards 43. The insulating member 41 has a film shape, and the material of the insulating member 41 includes polyethylene terephthalate. The insulating member 41 further has a weakened portion 411, the weakened portion 411 being provided between any two of the bus members 44 adjacent in the second direction Y and spaced apart from the sampling wiring board 43, the weakened portion 411 being configured to be deformable by the action of an expansion force. The weak portion 411 is hollow, the weak portion 411 includes an extension portion 411a and an end portion 411b, the extension portion 411a extends along a first direction X, the end portion 411b is communicated with two ends of the extension portion 411a along the first direction X, a size of the end portion 411b along a second direction Y is larger than a size of the extension portion 411a along the second direction Y, and the first direction X intersects with the second direction Y. The sampling circuit board 43 includes a body portion 43a and a bending portion 43b, the body portion 43a extends along a second direction Y and is adhesively connected through the insulating member 41 by the thermosetting adhesive layer 42, the bending portion 43b is bent toward the insulating member 41 from at least one end of the body portion 43a along the second direction Y, and the insulating member 41 has a clearance opening 41b along the second direction Y corresponding to the bending portion 43b.

The signal acquisition assembly 40 that this embodiment provided, through setting up thermosetting glue film 42 coating in one side of insulating part 41, thermosetting glue film 42 realizes sampling circuit board 43, support piece 47 and the bonding connection of converging piece 44 and insulating part 41 in the solidification process, and because thermosetting glue film 42 solidification back no longer has the viscidity, reduced the risk that dust etc. attached to on thermosetting glue film 42 and influence signal sampling assembly's sampling effect, be favorable to improving the accuracy of the operating parameter of the battery monomer 30 that signal acquisition assembly 40 gathered, and then be favorable to improving the reliability performance of battery 10.

While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application, and in particular, the technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (13)

1. A signal acquisition assembly for a battery, the signal acquisition assembly comprising:

an insulating member;

a thermosetting adhesive layer coated on one side of the insulating member;

and the sampling circuit board is connected with the insulating piece through the thermosetting adhesive layer in an adhesive mode, and the sampling circuit board is configured to be capable of collecting working parameters of the battery.

2. The signal acquisition assembly of claim 1, wherein the thermosetting adhesive layer is cured from one of a hot melt adhesive, an epoxy adhesive, a phenolic adhesive, an imino resin, and a polyurethane adhesive.

3. The signal acquisition assembly of claim 1, further comprising a bussing member, the insulating member having a through hole, the bussing member covering the through hole, the through hole configured to be able to pass through an electrode terminal of a cell of the battery to electrically connect the bussing member with the electrode terminal.

4. The signal acquisition assembly of claim 3 further comprising a first acquisition terminal, the sampling circuit board comprising a plurality of sampling harnesses, the first acquisition terminal being disposed between the bus bar and the insulator and being configured to electrically connect the bus bar and at least a portion of the sampling harnesses.

5. The signal acquisition assembly of claim 4, further comprising a second acquisition terminal electrically connected to at least another portion of the sampling harness; the insulating piece is provided with a clearance hole, and the second acquisition terminal is used for penetrating through the clearance hole and abutting against the battery monomer of the battery so as to acquire temperature information of the battery monomer.

6. A signal acquisition assembly according to claim 3, wherein the insulating member further has a weakened portion disposed between adjacent ones of the bus members and spaced from the sampling circuit board, the weakened portion being configured to deform under the influence of an expansion force.

7. The signal acquisition assembly of claim 6, wherein the frangible portion is hollowed out, the frangible portion comprises an extension portion and an end portion, the extension portion extends in a first direction, the end portion is in communication with both ends of the extension portion in the first direction, a dimension of the end portion in a second direction is greater than a dimension of the extension portion in the second direction, and the first direction intersects the second direction.

8. The signal acquisition assembly of claim 7, wherein the frangible portion is disposed between any two of the bus members adjacent in the second direction.

9. The signal acquisition assembly according to claim 1, wherein the sampling circuit board comprises a body portion and a bending portion, the body portion extends along a second direction and is in adhesive connection with the insulating member through the thermosetting adhesive layer, the bending portion is formed by bending at least one end of the body portion along the second direction towards the insulating member, and a clearance opening is formed in a position, corresponding to the bending portion, of the insulating member along the second direction.

10. The signal acquisition assembly of claim 1, wherein the insulator is in the form of a film, and wherein the material of the insulator comprises polyethylene terephthalate.

11. The signal acquisition assembly of claim 1, further comprising a support member adhesively coupled to the insulating member via the thermosetting adhesive layer, the support member being disposed between adjacent two of the sampling circuit boards to support the sampling circuit boards.

12. A battery comprising a signal acquisition assembly according to any one of claims 1 to 11.

13. An electrical device comprising a battery as claimed in claim 12, said battery being arranged to provide electrical energy.