CN220774524U

CN220774524U - Battery cell, battery and electricity utilization device

Info

Publication number: CN220774524U
Application number: CN202320872280.XU
Authority: CN
Inventors: 张继君; 冯婷; 王少飞; 魏奕民
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-04-18
Filing date: 2023-04-18
Publication date: 2024-04-12
Anticipated expiration: 2033-04-18

Abstract

The application discloses a battery cell, a battery and an electric device. The battery cell comprises a shell, an electrode assembly, a circuit board assembly, a detection sensor and a processor. The electrode assembly is disposed inside the case. The circuit board assembly is arranged on the shell and comprises a first area and a second area, wherein the first area is exposed in the shell, and the second area is exposed outside the shell. The detection sensor comprises a sampling module, and the sampling module is arranged in the first area. The processor is arranged in the second area. By the mode, the occupied area of the circuit board assembly can be reduced, the occupied area of the circuit board assembly to the shell is reduced, and therefore the compactness of the battery cell structure is improved.

Description

Battery cell, battery and electricity utilization device

Technical Field

The application relates to the technical field of batteries, in particular to a battery cell, a battery and an electric device.

Background

With the development of battery technology, battery cells are applied to more and more fields, and gradually replace the traditional petrochemical energy sources in the field of automobile power. The battery cells may store chemical energy and controllably convert the chemical energy into electrical energy. In the recyclable battery cell, the active material can be activated by means of charging after discharge to continue use.

The battery cell often includes an electrode assembly, an electrode post, a circuit board assembly, and a housing capable of receiving the electrode assembly. The electrode assembly is electrically connected to the outside through the electrode post. In the existing battery monomer structure, the occupied area of the circuit board assembly is larger, and the occupied area of the circuit board assembly to the shell is larger, so that the compact arrangement of the battery monomer integral structure is inconvenient.

Disclosure of Invention

In view of the above, the application provides a battery cell, a battery and an electric device, which can reduce the occupied area of a circuit board assembly and reduce the occupied area of the circuit board assembly to a shell, thereby improving the compactness of the battery cell structure.

In a first aspect, the present application provides a battery cell including a housing, an electrode assembly, a circuit board assembly, a detection sensor, and a processor. The electrode assembly is disposed inside the case. The circuit board assembly is arranged on the shell and comprises a first area and a second area, wherein the first area is exposed in the shell, and the second area is exposed outside the shell. The detection sensor comprises a sampling module, and the sampling module is arranged in the first area. The processor is arranged in the second area.

Through the mode, the sampling module and the processor are respectively arranged in the first area and the second area of the two sides of the circuit board assembly, compared with the area of the sampling module and the area of the processor arranged on the same side, the transverse area of the circuit board assembly can be reduced, the occupied area of the circuit board assembly can be reduced, the occupation of the circuit board assembly to the area of the shell is reduced, more other parts are convenient to install on the shell, the interference probability of the circuit board assembly to other parts on the shell is reduced, and therefore the compactness of the battery cell structure is improved. The sampling module is arranged in a first area exposed in the shell, so that the accuracy of sampling the environment in the shell is improved. The processor is arranged in a second area exposed outside the shell, so that the heat dissipation of the processor is facilitated, the processor is spaced from the electrode assembly, and the probability of corrosion of the processor by electrolyte in the shell is reduced.

In some embodiments, the housing includes a wall portion that defines a mounting hole that communicates between the interior of the housing and the exterior of the housing. The circuit board assembly comprises a first circuit board, and the first circuit board seals the mounting hole. The first area is positioned on one side of the first circuit board facing the inside of the shell and is exposed out of the inside of the shell through the mounting hole. The second region is located on a side of the first circuit board facing away from the interior of the housing.

Through the mode, the sampling module is exposed through the mounting hole, and environmental information inside the shell can be acquired. And through setting up sampling module and exposing through the mounting hole, reducible sampling module's occupation space in the inside at the shell to can provide more accommodation space for electrode assembly, improve the inside space utilization of shell, and then improve the elementary volume energy density of battery, improve the compactibility of the elementary structure of battery. The sealing performance of the inside of the battery monomer can be improved through the first circuit board plugging mounting hole, and the safety of the battery monomer is ensured. Furthermore, the positions of the mounting holes can provide guidance and positioning for the mounting positions of the first circuit board, so that the first circuit board can be mounted conveniently.

In some embodiments, the first circuit board is disposed within the mounting hole, and the shape of the mounting hole matches the shape of the first circuit board such that the mounting hole is used to mount and position the first circuit board.

By the mode, the mounting hole can limit the first circuit board to move along the radial direction of the mounting hole, and positioning and mounting of the first circuit board are facilitated. And the space occupation of the first circuit board can be reduced by arranging the first circuit board in the mounting hole, so that the whole battery monomer volume can be reduced, the volume energy density can be improved, and the space is more compact.

In some embodiments, the mounting hole includes a first hole section and a second hole section in communication with each other, the first hole section being closer to the interior of the housing than the second hole section, and a junction of the first hole section and the second hole section being formed with a support mesa facing the second hole section. At least part of the first circuit board is arranged on the second hole section and supported on the supporting table board.

Through the mode, the supporting table top can limit the first circuit board to move towards the inside of the shell, so that the distance between the first circuit board and the electrode assembly is stable, the probability of short circuit or short circuit between the first circuit board and the electrode assembly is reduced, the second hole section can limit the movement range of the first circuit board along the radial direction of the mounting hole, and the mounting of the first circuit board is facilitated.

In some embodiments, at least a portion of the sampling module is located within the first bore section.

Through the mode, the sampling module can directly face the inside of the shell, and the sampling module is beneficial to quickly and accurately acquiring the state information in the shell. Moreover, at least part of the sampling module occupies the space of the shell in the first hole section, and does not occupy the space inside the shell, thereby being beneficial to improving the space utilization rate inside the shell and improving the volume energy density. In addition, being located within the first bore section may be further from the electrode assembly than being disposed within the housing, reducing the probability of corrosion and shorting with the electrode assembly.

In some embodiments, the first circuit board is soldered to the wall portion.

Through the mode, on one hand, the sealing can be effectively formed between the first circuit board and the wall part, electrolyte leakage is reduced, on the other hand, the balanced distribution of acting force between the first circuit board and the wall part is facilitated, the connection stability of the first circuit board and the wall part is improved, and further the reliability of the battery monomer is improved.

In some embodiments, the first circuit board includes a metal substrate that is soldered to the wall portion. Or, the first circuit board comprises a substrate main body and a metal frame, the metal frame is sleeved and fixed on the outer periphery of the substrate main body, and the metal frame is welded and fixed with the wall part.

By the mode, the welding connection between the first circuit board and the wall part is facilitated, and the welding reliability between the first circuit board and the wall part is improved.

In some embodiments, the housing includes a wall portion and the circuit board assembly includes a first circuit board and a second circuit board that are separated from each other. The first circuit board and the second circuit board are oppositely arranged at two sides of the wall part, and the first circuit board and the second circuit board are electrically connected. The first region is located on the first circuit board, and the second region is located on the second circuit board. The first circuit board is arranged inside the shell, and the second circuit board is arranged outside the shell.

Through the above-mentioned mode, on the one hand, first circuit board and second circuit board set up sampling module and treater respectively, are convenient for realize solitary change to first circuit board or second circuit board, realize the modularization installation, are favorable to reducing the transverse area of circuit board subassembly moreover, reduce the occupation of circuit board subassembly to the transverse area of wall portion, improve the utilization of circuit board subassembly to the space of the vertical direction of wall portion. On the other hand, first circuit board and second circuit board are located the both sides of wall for the second circuit board deviates from inside the shell and electrode subassembly, and then keeps away from inside the shell and electrode subassembly, reduces the risk that treater and second circuit board and electrode subassembly take place the short circuit, also reduces the corruption of electrolyte to second circuit board and treater, and sampling module setting can sample the environment of outside inside the shell effectively at first circuit board.

In some embodiments, the orthographic projections of the first circuit board and the second circuit board on a plane parallel to the wall portion are completely coincident, or the orthographic projection of one is located within the orthographic projection of the other.

Through the mode, on one hand, the installation and the dismantlement of first circuit board and second circuit board of being convenient for, on the other hand, two superimposed settings are favorable to reducing the occupation of the lateral area of first circuit board and second circuit board to the wall portion.

In some embodiments, the battery cell includes a connection assembly disposed through the wall portion and electrically connected to the first circuit board and the second circuit board, respectively.

Through the mode, the connecting component penetrates through the wall portion to correspondingly position the first circuit board and the second circuit board, and is arranged on the wall portion, so that the structure is more stable, the electric connection between the first circuit board and the second circuit board is more stable, and information transmission can be realized through the connecting component more stably.

In some embodiments, the connection assembly includes a plurality of connection terminals that pass through the wall portion to extend from the interior of the housing to the exterior of the housing. The first circuit board and the second circuit board are electrically connected through a plurality of connection terminals.

Through the mode, a plurality of connecting terminals are convenient for first circuit board and second circuit board installation butt, can realize quick installation and dismantlement, compare in wire connection, improve assembly efficiency, also can promote electrical safety.

In some embodiments, the wall portion is provided with a communication hole, the connection assembly is arranged through the communication hole, and the first circuit board and/or the second circuit board block the communication hole.

Through the mode, the first circuit board and/or the second circuit board block the communication hole, the tightness of the wall part can be improved, the probability of electrolyte leakage inside the shell is reduced, the influence of the environment outside the shell on the inside of the shell can be reduced, and the sampling accuracy of the sampling module is further improved.

In some embodiments, the wall portion is provided with a first mounting groove for communicating with the communication hole, the first mounting groove faces the inside of the housing, and the first circuit board is arranged in the first mounting groove and seals the communication hole.

Through the mode, the first circuit board is arranged in the first mounting groove, so that the occupied space of the first circuit board outside the shell or inside the shell can be reduced, the whole volume of the battery cell is reduced, and the volume energy density is improved. And the first mounting groove can also position and limit the first circuit board, so that the stability of the mounting structure of the first circuit board is improved, and the reliability of the battery cell is further improved. In addition, the first circuit board is favorable for improving the tightness of the shell by plugging the communication hole.

In some embodiments, the wall portion is provided with a second mounting groove for communicating with the communication hole, the second mounting groove faces away from the interior of the housing, and the second circuit board is arranged in the second mounting groove and seals the communication hole.

Through the mode, the second circuit board is arranged in the second mounting groove, the occupied space of the second circuit board can be reduced, the second mounting groove can position and limit the second circuit board, the stability of the mounting structure of the second circuit board is improved, and then the reliability of the battery is improved. In addition, the second circuit board is favorable for improving the tightness of the shell by plugging the communication hole.

In some embodiments, the battery cell includes a functional circuit disposed in the second region, the functional circuit including at least one of a communication circuit and an equalization circuit. And/or the detection sensor comprises a conditioning module, and the conditioning module is arranged in the second area.

Through the mode, the functional circuit is arranged in the second area, so that corrosion damage of electrolyte to the functional circuit can be effectively reduced, and risks of short circuit and the like between the electrode assembly and the functional circuit are reduced. The conditioning module is arranged in the second area, so that corrosion damage of electrolyte to the conditioning module can be effectively reduced, and risks such as short circuit between the electrode assembly and the functional circuit are reduced.

In some embodiments, the housing includes a shell provided with an open end and an end cap provided over the open end, the end cap forming a wall, the electrode assembly being disposed inside the shell. The battery cell comprises two electrode columns arranged at intervals, the two electrode columns are electrically connected with the electrode assembly, the two electrode columns penetrate through the end cover, and the circuit board assembly is located between the two electrode columns.

Through the mode, the circuit board assembly is arranged between the two electrode columns, the possibility that the circuit board assembly interferes with the electrode columns is reduced, and risks such as short circuit and the like caused by contact with the electrode columns are reduced. And the wall parts are arranged between the electrode columns, so that the space between the electrode columns can be effectively utilized, and the space utilization rate is improved.

In a second aspect, the present application provides a battery comprising the above-described battery cell.

In a third aspect, the present application provides an electrical device comprising the above battery.

Drawings

FIG. 1 is a schematic structural view of a vehicle according to one or more embodiments;

fig. 2 is an exploded view of a battery according to one or more embodiments;

fig. 3 is an exploded view of a battery cell according to one or more embodiments;

Fig. 4 is a partial schematic structure of a battery cell according to one or more embodiments;

FIG. 5 is a schematic block diagram of a circuit configuration of a battery cell according to one or more embodiments;

FIG. 6 is a schematic diagram of the mounting locations of the circuit board assembly, the detection sensor, the processor and the functional circuitry shown in FIG. 5;

fig. 7 is an exploded view illustrating a partial structure of the battery cell shown in fig. 4;

FIG. 8 is a schematic top view of the battery cell of FIG. 4 with a circuit board assembly partially concealed;

FIG. 9 is a schematic cross-sectional view of a portion of the structure of the battery cell shown in FIG. 8 along section line B-B;

FIG. 10 is a schematic structural view of a first circuit board according to one or more embodiments;

FIG. 11 is yet another structural schematic of a first circuit board according to one or more embodiments;

fig. 12 is a further exploded view of a part of the structure of the battery cell shown in fig. 4;

FIG. 13 is a schematic view of the mounting locations of the circuit board assembly, the detection sensor, the processor and the functional circuitry of FIG. 12;

FIG. 14 is a schematic view of still another mounting location of the circuit board assembly, test sensor, processor and functional circuitry of FIG. 12;

FIG. 15 is a schematic top view of the battery cell of FIG. 4 with a circuit board assembly partially concealed;

Fig. 16 is a schematic cross-sectional view of a portion of the structure of the battery cell shown in fig. 15 along the B-B section line.

Reference numerals in the specific embodiments are as follows:

1000a of a vehicle;

a 100a battery; 200a controllers; 300a motor;

10a box body; 11a first part; 12a second part;

1, a battery cell; 100 shells; 101 wall portions; 102 mounting holes; 103 a first bore section; 104 a second bore section; 105 supporting the table top; 106 communicating holes; 107 a first mounting groove; 108 a second mounting slot; 110 a housing; 111 open ends; 112 opening; 120 end caps; 200 electrode assemblies; 201 pole lugs; 300 circuit board assembly; 301 a first region; 302 a second region; 310 a first circuit board; 311 metal substrate; 312 a substrate body; 313 metal frame; 310 a second circuit board; 400 detecting a sensor; 410 a sampling module; 420 a conditioning module; a 500 processor; 600 a connection assembly; 610 connection terminals; 700 function circuits; a 710 communication circuit; 720 an equalization circuit; 800 electrode column.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Unless defined otherwise, 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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein 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 present 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 appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

With the development of battery technology, battery cells are applied to more and more fields, and gradually replace traditional fossil energy sources in the field of automobile power. The battery cells may store chemical energy and controllably convert the chemical energy into electrical energy. In the recyclable battery cell, the active material can be activated by means of charging after discharge to continue use.

The battery cell may include an electrode assembly, an electrode column, a circuit board assembly, and a case capable of accommodating the electrode assembly. The electrode assembly is electrically connected to the outside through the electrode post. In the structure of the existing battery cell, the area of the case is often limited and compact. In the related art, in order to realize the corresponding functions, various components and circuit board assemblies may need to be arranged on the housing, and the circuit board assemblies have larger transverse occupied areas due to the arrangement of various components on one side surface of the circuit board assemblies, so that the circuit board assemblies occupy larger areas of the housing, thereby being inconvenient for the compact arrangement of the whole structure of the battery cell and occupying the areas of other components on the housing.

In order to improve the compactness of the battery cell structure, a circuit board assembly including a first region and a second region may be provided. Wherein the first region is exposed to the interior of the housing and the second region is exposed to the exterior of the housing. Through exposing first region and the second region of circuit board subassembly in the shell is inside and the shell is outside respectively to set up sampling module and treater in the first region and the second region of the both sides that the circuit board subassembly is on the back side respectively, compare in setting up sampling module and treater in the region of homonymy, can reduce the horizontal area of circuit board subassembly, and then be favorable to improving the utilization to the space of shell, thereby be favorable to reducing the area occupied of circuit board subassembly, be favorable to reducing the occupation of circuit board subassembly to the shell area, install more other parts on the shell of being convenient for, reduce the probability that circuit board subassembly interferes other parts on the shell, thereby improve the compactibility of battery monomer structure. The sampling module is arranged in the first area exposed in the shell, so that the sampling module is favorable for rapidly and accurately acquiring the state information in the shell, the accuracy of sampling the environment in the shell is favorable for improving the effectiveness of managing the working state of the battery cell, and the working stability of the battery cell is improved. The processor is arranged in the second area exposed outside the shell, so that the heat dissipation of the processor is facilitated, and the processor is prevented from being contacted with the electrode assembly, so that the corrosion probability of electrolyte to the processor is reduced.

Based on the above considerations, the present application provides battery cells, batteries, and power usage devices. The battery cell comprises a shell, an electrode assembly, a circuit board assembly, a detection sensor and a processor. The electrode assembly is disposed inside the case. The circuit board assembly is arranged on the shell and comprises a first area and a second area, wherein the first area is exposed in the shell, and the second area is exposed outside the shell. The detection sensor comprises a sampling module, and the sampling module is arranged in the first area. The processor is arranged in the second area. Thus, the compactness of the battery cell structure can be improved.

The battery cell, the battery and the power utilization device disclosed by the embodiment of the application can be used for a power utilization device using the battery as a power supply or various energy storage systems using the battery as an energy storage element. The power device may be, but is not limited to, a cell phone, tablet, notebook computer, electric toy, electric tool, battery car, electric car, ship, spacecraft, etc. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000 a.

Referring to fig. 1, a vehicle 1000a may be a fuel-oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. The battery 100a is provided inside the vehicle 1000a, and the battery 100a may be provided at the bottom or the head or the tail of the vehicle 1000 a. The battery 100a may be used for power supply of the vehicle 1000a, for example, the battery 100a may be used as an operating power source of the vehicle 1000 a. The vehicle 1000a may also include a controller 200a and a motor 300a, the controller 200a being configured to control the battery 100a to power the motor 300a, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000 a.

In some embodiments of the present application, battery 100a may not only serve as an operating power source for vehicle 1000a, but also as a driving power source for vehicle 1000a, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000 a.

In some embodiments, battery 100a 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 100a mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells 1 to provide higher voltage and capacity.

In this embodiment, the battery cell 1 may be a secondary battery, and the secondary battery refers to a battery cell that can be continuously used by activating the active material in a charging manner after the battery cell is discharged. Each battery cell 1 may also be a primary battery.

The battery cell 1 includes, but is not limited to, a lithium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, and the like. The battery cell 1 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

In some embodiments, the battery 100a may be a battery module, and when there are a plurality of battery cells 1, the plurality of battery cells 1 are arranged and fixed to form one battery module.

In some embodiments, referring to fig. 2, the battery 100a may be a battery pack, which includes a case 10a and a battery cell 1, and the battery cell 1 or the battery module is accommodated in the case 10 a.

In some embodiments, the tank 10a may be part of the chassis structure of the vehicle 1000 a. For example, a portion of the tank 10a may become at least a portion of the floor of the vehicle 1000a, or a portion of the tank 10a may become at least a portion of the cross member and the side member of the vehicle 1000 a.

Referring to fig. 2, a battery 100a includes a case 10a and a battery cell 1, and the battery cell 1 is accommodated in the case 10 a. The case 10a is used to provide a receiving space for the battery cell 1, and the case 10a may have various structures. In some embodiments, the case 10a may include a first portion 11a and a second portion 12a, the first portion 11a and the second portion 12a being mutually covered, the first portion 11a and the second portion 12a together defining an accommodating space for accommodating the battery cell 1. The second portion 12a may be a hollow structure with one end opened, the first portion 11a may be a plate-shaped structure, and the first portion 11a covers the opening side of the second portion 12a, so that the first portion 11a and the second portion 12a together define an accommodating space; the first portion 11a and the second portion 12a may be hollow structures each having an opening at one side, and the opening side of the first portion 11a is covered with the opening side of the second portion 12 a. Of course, the case 10a formed by the first portion 11a and the second portion 12a may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

In the battery 100a, the plurality of battery cells 1 may be connected in series, parallel or a series-parallel connection between the plurality of battery cells 1, and the series-parallel connection refers to that the plurality of battery cells 1 are connected in series or in parallel. The plurality of battery cells 1 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 1 is accommodated in the box 10 a; of course, the battery 100a may be a battery module formed by connecting a plurality of battery cells 1 in series or parallel or series-parallel connection, and a plurality of battery modules are connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10 a. The battery 100a may further include other structures, for example, the battery 100a may further include a bus member for making electrical connection between the plurality of battery cells 1.

Referring to fig. 3 and 4, the battery cell 1 refers to the smallest unit constituting the battery. In the present embodiment, a cylindrical battery cell 1 is described as an example. As shown in fig. 3 and 4, the battery cell 1 includes a case 100, and an electrode assembly 200 and other functional components.

In some embodiments, the housing 100 is used to encapsulate the electrode assembly 200 and electrolyte, among other components. The housing 100 may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), an aluminum-plastic film, or the like.

The housing 100 may include an end cap 120 and a shell 110. The end cap 120 refers to a member that is covered at the opening of the case 110 to isolate the internal environment of the battery cell 1 from the external environment. Without limitation, the shape of the end cap 120 may be adapted to the shape of the housing 110 to fit the housing 110. Optionally, the end cover 120 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 120 is not easy to deform when being extruded and collided, so that the battery cell 1 can have higher structural strength, and the safety performance can be improved. The end cap 120 may be provided with functional components such as an electrode column 800. The electrode column 800 may be used to be electrically connected with the electrode assembly 200 for outputting or inputting electric power of the battery cell 1. In some embodiments, the end cap 120 may further be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 1 reaches a threshold value. The end cap 120 may also be made of a variety of materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member may also be provided on the inside of the end cap 120, which may be used to isolate the electrical connection members within the housing 110 from the end cap 120 to reduce the risk of short circuits. By way of example, the insulating member may be plastic, rubber, or the like.

The case 110 is an assembly for cooperating with the end cap 120 to form an internal environment of the battery cell 1, wherein the formed internal environment may be used to accommodate the electrode assembly 200, the electrolyte, and other components. The case 110 and the end cap 120 may be separate components, and an opening 112 may be provided in the case 110, and the interior of the battery cell 1 may be formed by covering the opening 112 with the end cap 120 at the opening 112. It is also possible to integrate the end cap 120 and the housing 110, specifically, the end cap 120 and the housing 110 may form a common connection surface before other components are put into the housing, and when the interior of the housing 110 needs to be sealed, the end cap 120 is then covered with the housing 110. The housing 110 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 110 may be determined according to the specific shape and size of the electrode assembly 200. The material of the housing 110 may be various, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

The electrode assembly 200 is a component in which electrochemical reactions occur in the battery cell 1. One or more electrode assemblies 200 may be contained within the case 110.

In some embodiments, the electrode assembly 200 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 separator 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 some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

As an example, the positive electrode current collector has two surfaces opposing in its own thickness direction, and the positive electrode active material is provided on either or both of the two surfaces opposing the positive electrode current collector.

As an example, the positive electrode current collector may employ a metal foil or a composite current collector. For example, as the metal foil, silver-surface-treated aluminum or stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, or the like can be used. The composite current collector may include a polymeric material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (e.g., a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material may be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of the lithium-containing phosphate may include, but are not limited to, at least one of lithium iron phosphate (e.g., liFePO4 (which may also be abbreviated as LFP)), a composite of lithium iron phosphate and carbon, lithium manganese phosphate (e.g., liMnPO 4), a composite of lithium manganese phosphate and carbon, lithium manganese phosphate, and a composite of lithium manganese phosphate and carbon. Examples of lithium transition metal oxides may include, but are not limited to, lithium cobalt oxides (e.g., liCoO) ₂ ) Lithium nickel oxide (e.g. LiNiO) ₂ ) Lithium manganese oxide (e.g. LiMnO ₂ 、LiMn2O ₄ ) Lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (e.g., liNi) _1/3 Co _1/3 Mn _1/3 O ₂ (also referred to as NCM) ₃₃₃ )、LiNi _0.5 Co _0.2 Mn _0.3 O ₂ (also referred to as NCM) ₅₂₃ )、LiNi _0.5 Co _0.25 Mn _0.25 O ₂ (also referred to as NCM) ₂₁₁ )、LiNi _0.6 Co _0.2 Mn _0.2 O ₂ (also referred to as NCM) ₆₂₂ )、LiNi _0.8 Co _0.1 Mn _0.1 O ₂ (also referred to as NCM) ₈₁₁ ) Lithium nickel cobalt aluminum oxide (e.g. LiNi _0.85 Co _0.15 Al _0.05 O ₂ ) And At least one of modified compounds thereof and the like.

In some embodiments, the negative electrode may be a negative electrode tab, which may include a negative electrode current collector.

As an example, the negative electrode current collector may employ a metal foil, a foam metal, or a composite current collector. For example, as the metal foil, silver-surface-treated aluminum or stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, or the like can be used. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, foam carbon or the like. The composite current collector may include a polymeric material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (e.g., a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

As an example, the anode current collector has two surfaces opposing in its own thickness direction, and the anode active material is provided on either or both of the two surfaces opposing the anode current collector.

As an example, a negative active material for a battery cell, which is well known in the art, may be used. As an example, the anode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, and the like. The silicon-based material may be at least one selected from elemental silicon, silicon oxygen compounds, silicon carbon composites, silicon nitrogen composites, and silicon alloys. The tin-based material may be at least one selected from elemental tin, tin oxide, and tin alloys. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery anode active material may be used. These negative electrode active materials may be used alone or in combination of two or more.

In some embodiments, the material of the positive electrode current collector may be aluminum and the material of the negative electrode current collector may be copper.

In some embodiments, the electrode assembly 200 further includes a separator disposed between the positive electrode and the negative electrode.

In some embodiments, the separator is a separator film. The type of the separator is not particularly limited, and any known porous separator having good chemical stability and mechanical stability may be used.

As an example, the main material of the separator may be at least one selected from glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator may be a single-layer film or a multilayer composite film, and is not particularly limited. When the separator is a multilayer composite film, the materials of the respective layers may be the same or different, and are not particularly limited. The separator may be a single member located between the positive and negative electrodes, or may be attached to the surfaces of the positive and negative electrodes.

In some embodiments, the separator is a solid state electrolyte. The solid electrolyte is arranged between the anode and the cathode and plays roles in transmitting ions and isolating the anode and the cathode.

In some embodiments, the battery cell further includes an electrolyte that serves to conduct ions between the positive and negative electrodes. The type of electrolyte is not particularly limited in this application, and may be selected according to the need. The electrolyte may be liquid, gel or solid.

Wherein the liquid electrolyte comprises an electrolyte salt and a solvent.

In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis-fluorosulfonyl imide, lithium bis-trifluoromethanesulfonyl imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalato borate, lithium difluorodioxaato phosphate, and lithium tetrafluorooxalato phosphate.

In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methylethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylpropyl carbonate, ethylpropyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1, 4-butyrolactone, sulfolane, dimethyl sulfone, methyl sulfone, and diethyl sulfone. The solvent may also be selected from ether solvents. The ether solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1, 3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether, and crown ether.

The gel electrolyte comprises a skeleton network taking a polymer as an electrolyte and is matched with ionic liquid-lithium salt.

Wherein the solid electrolyte comprises a polymer solid electrolyte, an inorganic solid electrolyte and a composite solid electrolyte.

As examples, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, single ion polymer, polyion liquid-lithium salt, cellulose, or the like.

As an example, the inorganic solid electrolyte may be one or more of an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), a sulfide solid electrolyte (crystalline lithium super ion conductor (lithium germanium phosphorus sulfide, silver sulfur germanium mine), amorphous sulfide), and a halide solid electrolyte, a nitride solid electrolyte, and a hydride solid electrolyte.

As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

In some embodiments, the electrode assembly 200 is a rolled structure. The positive plate and the negative plate are wound into a winding structure.

In some embodiments, the electrode assembly 200 is provided with tabs 201, and the tabs 201 may direct current from the electrode assembly 200. The tab 201 includes a positive tab and a negative tab. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery 100a, the positive and negative electrode active materials react with the electrolyte, and the tab 201 connects the electrode posts to form a current loop.

According to some embodiments of the present application, as shown in fig. 3 to 6, the battery cell 1 described in the embodiments of the battery cell 1 of the present application includes a case 100, an electrode assembly 200, a circuit board assembly 300, a detection sensor 400, and a processor 500. The electrode assembly 200 is disposed inside the case 100. The circuit board assembly 300 is disposed on the housing 100, and the circuit board assembly 300 includes a first area 301 and a second area 302, wherein the first area 301 is exposed inside the housing 100, and the second area 302 is exposed outside the housing 100. The detection sensor 400 includes a sampling module 410, and the sampling module 410 is disposed in the first area 301. The processor 500 is disposed in the second region 302.

The case 100 of the battery cell 1 serves as a skeleton of the battery cell 1, and is a place where the rest of the structures in the battery cell 1 are arranged and mounted, and the case 100 provides a space for arranging and mounting the circuit board assembly 300 for information transmission, and also provides a space for arranging and mounting other structures, such as an explosion-proof valve for preventing the explosion of the battery cell 1, and for example, a positive electrode column and a negative electrode column electrically connected with the electrode assembly 200 to realize charge and discharge of the electrode assembly 200. The sampling module 410 and the processor 500 can be respectively arranged in the first area 301 and the second area 302 on two opposite sides of the circuit board assembly 300, so that compared with the area where the sampling module 410 and the processor 500 are arranged on the same side, the transverse area of the circuit board assembly 300 can be reduced, the occupied area of the circuit board assembly 300 can be reduced, the occupation of the circuit board assembly 300 on the area of the housing 100 can be reduced, more other components can be conveniently mounted on the housing 100, the interference probability of the circuit board assembly 300 on other components on the housing 100 can be reduced, and the compactness of the structure of the battery cell 1 can be improved.

During use of the battery cell 1, the interior of the housing 100 is often subjected to dynamic changes, such as volumetric expansion of the electrode assembly 200, changes in temperature and pressure within the housing 100, or the generation of gases within the housing 100. The sampling module 410 is disposed in the first area 301 exposed to the interior of the housing 100, and the detection sensor 400 can obtain the status information of the interior of the housing 100 through the sampling module 410. The detection sensor 400 may be electrically connected to the circuit board assembly 300. Through setting up sampling module 410 in exposing in the inside first region 301 of shell 100, be favorable to sampling module 410 to acquire the inside state information of shell 100 fast accurately, be favorable to improving the accuracy of sampling the inside environment of shell 100, improve the validity of managing battery cell 1 operating condition to improve battery cell 1 job stabilization nature.

The processor 500 is disposed in the second region 302 exposed to the interior of the housing 100. The processor 500 may be electrically connected to the circuit board assembly 300 and thus to the detection sensor 400. The processor 500 may be used to analyze the status information obtained by the detection sensor 400. For example, the processor 500 may determine the gas composition and concentration, temperature or gas pressure inside the case 100 according to the state information acquired by the detection sensor 400, thereby analyzing the operation state of the battery cell 1.

The processor 500 may be an integrated circuit chip with signal processing capabilities. Processor 500 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The general purpose processor 500 may be a microprocessor or the processor may be any conventional processor or the like.

For example, the processor 500 is an MCU. By disposing the processor 500 in the second region 302, the connection stability between the processor 500 and the circuit board assembly 300 can be improved, and thus the connection stability between the processor 500 and the detection sensor 400 can be improved. The placement of the processor 500 in the second region 302 exposed outside the housing 100 facilitates heat dissipation from the processor 500 on the one hand, and spaces the processor 500 from the electrode assembly 200 on the other hand, reducing the probability of corrosion of the processor 500 by the electrolyte inside the housing 100.

Optionally, as shown in fig. 4 and 7, the housing 100 may include a wall portion 101, the wall portion 101 being provided with a mounting hole 102 communicating between the interior of the housing 100 and the exterior of the housing 100, according to some embodiments of the present application. The circuit board assembly 300 includes a first circuit board 310, the first circuit board 310 blocking the mounting hole 102. The first region 301 is located on a side of the first circuit board 310 facing the interior of the housing 100, and is exposed to the interior of the housing 100 through the mounting hole 102. The second region 302 is located on a side of the first circuit board 310 facing away from the interior of the housing 100.

The wall portion 101 may be used to mount a first circuit board 310. The wall portion 101 is smoother than the housing 110, which is beneficial for mounting and dismounting the first circuit board 310. The sampling module 410 is exposed through the mounting hole 102, which is beneficial to acquiring environmental information inside the housing 100. And through setting up sampling module 410 and exposing through mounting hole 102, reducible sampling module 410 is at the inside occupation space of shell 100 to can provide more accommodation space for electrode assembly 200, improve the inside space utilization of shell 100, and then improve the volume energy density of battery monomer 1, improve the compactibility of battery monomer 1's structure. Sealing the mounting hole 102 through the first circuit board 310 can improve the sealing performance inside the battery cell 1 and ensure the safety of the battery cell 1. Furthermore, the location of the mounting holes 102 can provide guidance and positioning for the mounting location of the first circuit board 310, facilitating the mounting of the first circuit board 310.

Optionally, as shown in fig. 4 and 7, the first circuit board 310 is disposed in the mounting hole 102, and the shape of the mounting hole 102 matches the shape of the first circuit board 310, such that the mounting hole 102 is used for mounting and positioning the first circuit board 310.

For example, the first circuit board 310 and the mounting hole 102 are each circular or elliptical in shape. For another example, the first circuit board 310 and the mounting hole 102 are both rectangular and two semicircular shapes, wherein two opposite sides of the rectangle and two semicircles have equal diameters and lengths and are connected.

By disposing the first circuit board 310 in the mounting hole 102 with a shape matching the first circuit board, the mounting hole 102 can limit the first circuit board 310 to move along the radial direction of the mounting hole 102, which is beneficial to positioning and mounting the first circuit board 310. In addition, the first circuit board 310 is disposed in the mounting hole 102, which can reduce the space occupation of the first circuit board 310, thereby being beneficial to reducing the volume of the whole battery cell 1, further being beneficial to improving the volume energy density and making the space more compact.

Further, in the radial direction of the mounting hole 102, the portion of the first circuit board 310 located in the mounting hole 102 may fill the mounting hole 102, so as to seal the mounting hole 102, thereby restricting the electrolyte inside the battery cell 1 from leaking through the mounting hole 102.

The axial direction of the mounting hole 102 refers to a direction of spacing between an end of the mounting hole 102 facing the inside of the housing 100 and an end facing away from the inside of the housing 100, and a radial direction of the mounting hole 102 is perpendicular to the axial direction of the mounting hole 102.

Alternatively, the surface of the first circuit board 310 facing the inside of the housing 100 is countersunk into the mounting hole 102 and exposed with respect to the inside of the housing 100. In this way, the probability of the first circuit board 310 interfering with the components disposed inside the housing 100 can be reduced.

According to some embodiments of the present application, optionally, as shown in fig. 8 and 9, the mounting hole 102 includes a first hole section 103 and a second hole section 104 that are in communication with each other, the first hole section 103 is closer to the inside of the housing 100 than the second hole section 104, and a connection of the first hole section 103 and the second hole section 104 is formed with a support mesa 105 facing the second hole section 104. At least a portion of the first circuit board 310 is disposed in the second hole section 104 and supported by the support mesa 105.

The second hole section 104 may be used to mount a first circuit board 310. The support mesa 105 may restrict the movement of the first circuit board 310 toward the inside of the case 100, so that the distance between the first circuit board 310 and the electrode assembly 200 is stabilized, reducing the probability of shorting or short-circuiting therebetween. The second hole section 104 can limit the movement range of the first circuit board 310 along the radial direction of the mounting hole 102, which is beneficial to the mounting of the first circuit board 310. A partial region of the first circuit board 310 may be exposed to the interior of the housing 100 via the first hole section 103, and a partial region of the first circuit board 310 may be exposed to the exterior of the housing 100 via the second hole section 104.

Optionally, the first circuit board 310 is partially located within the first hole section 103 and partially located within the second hole section 104.

Optionally, the surface of the plate facing away from the interior of the housing 100 of the first circuit board 310 is flush with the edge of the second hole section 104 facing away from the first hole section 103 or is countersunk into the second hole section 104. The first circuit board 310 and the wall portion 101 may be connected by soldering, and a soldering operation may be performed on a side of the first circuit board 310 facing away from the inside of the housing 100. By arranging the surface of the plate body of the first circuit board 310 facing away from the interior of the housing 100 to be flush with the hole edge of the second hole section 104 facing away from the first hole section 103 or to be countersunk in the second hole section 104, during the soldering process, the first circuit board 310 may be melted and form a melt from the side of the first circuit board 310 facing away from the interior of the housing 100, so that the first circuit board 310 may be connected with the side wall of the second hole section 104 and/or the support mesa 105, whereby the soldering effect may be improved.

Optionally, as shown in fig. 6 and 9, at least a portion of the sampling module 410 is disposed within the first bore section 103, according to some embodiments of the present application.

The sampling module 410 may extend from the first circuit board 310 toward the inside of the housing 100. In particular, an end of the sampling module 410 facing away from the interior of the housing 100 may be connected to the first circuit board 310. The end of the sampling module 410 near the interior of the housing 100 may extend into the first bore section 103 or through the first bore section 103 to the interior of the housing 100.

Thus, the sampling module 410 can face the inside of the housing 100 directly, which is beneficial for the sampling module 410 to quickly and accurately acquire the state information inside the housing 100. Moreover, at least a portion of sampling module 410 occupies space within first bore segment 103 within housing 100 itself, and does not occupy space within housing 100, thereby facilitating an increase in space utilization within housing 100 and a volumetric energy density. In addition, being located within the first bore section 103 may be further from the electrode assembly 200 than being disposed inside the housing 100, reducing the probability of corrosion and shorting with the electrode assembly 200.

Further, the sampling module 410 may extend from the exposed area of the first circuit board 310 with respect to the interior of the housing 100 toward the interior of the housing 100.

Optionally, according to some embodiments of the present application, as shown in fig. 4, the first circuit board 310 is soldered to the wall portion 101.

Through the welded fastening of the first circuit board 310 and the wall portion 101, on one hand, the seal can be effectively formed between the first circuit board 310 and the wall portion 101, electrolyte leakage is reduced, on the other hand, the balanced distribution of acting force between the first circuit board 310 and the wall portion 101 is facilitated, the connection stability of the first circuit board 310 and the wall portion 101 is improved, and further the reliability of the battery cell 1 is improved.

Further, the periphery of the first circuit board 310 may be welded to the wall portion 101, and the circuits and interfaces on the first circuit board 310 may avoid the periphery of the first circuit board 310, for example, be disposed in the middle of the first circuit board 310, so as to reduce the influence of the welding process on the electrical functions of the first circuit board 310.

Optionally, as shown in fig. 10, according to some embodiments of the present application, the first circuit board 310 includes a metal substrate 311, and the metal substrate 311 is soldered to the wall portion 101.

The metal substrate 311 is made of metal. By providing the metal substrate 311, the soldering connection between the first circuit board 310 and the wall portion 101 is facilitated, and further, the soldering reliability between the first circuit board 310 and the wall portion 101 is improved.

Alternatively, as shown in fig. 11, the first circuit board 310 includes a substrate body 312 and a metal frame 313, the metal frame 313 is fixed around the outer periphery of the substrate body 312, and the metal frame 313 is welded to the wall 101.

The metal frame 313 is made of metal. The substrate body 312 may be a non-metallic material or a polymer material. By providing the metal frame 313, the first circuit board 310 and the wall portion 101 are advantageously welded, so that the substrate body 312 made of a non-metal material or a polymer material is fixed to the wall portion 101, and further, the welding reliability between the first circuit board 310 and the wall portion 101 is improved.

Optionally, as shown in fig. 3 and 12, the housing 100 includes a wall portion 101, and the circuit board assembly 300 includes a first circuit board 310 and a second circuit board 320 separated from each other, according to some embodiments of the present application. The first circuit board 310 and the second circuit board 320 are disposed opposite to each other on both sides of the wall portion 101, and the first circuit board 310 and the second circuit board 320 are electrically connected. The first region 301 is located on a first circuit board 310 and the second region 302 is located on a second circuit board 320. The first circuit board 310 is disposed inside the housing 100, and the second circuit board 320 is disposed outside the housing 100.

Through setting up first circuit board 310 and second circuit board 320 in opposite directions in wall 101 both sides, wherein, first circuit board 310 sets up in the shell 100 is inside, second circuit board 320 sets up in the shell 100 outside, with first region 301 exposes with the shell 100 is inside, expose second region 302 in the shell 100 outside, on the one hand, first circuit board 310 and second circuit board 320 set up sampling module 410 and treater 500 respectively, be convenient for realize the solitary change to first circuit board 310 or second circuit board 320, realize the modularization installation, and be favorable to utilizing the space of shell 100, reduce the lateral area of circuit board assembly 300, reduce the occupation of the lateral area of circuit board assembly 300 to wall 101, improve the utilization of the vertical direction space of circuit board assembly 300 to wall 101. On the other hand, the first circuit board 310 and the second circuit board 320 are located at two sides of the wall portion 101, so that the second circuit board 320 faces away from the interior of the housing 100 and the electrode assembly 200, and further away from the interior of the housing 100 and the electrode assembly 200, so that the risk of shorting the processor 500 and the second circuit board 320 with the electrode assembly 200 is reduced, corrosion of the second circuit board 320 and the processor 500 by the electrolyte is also reduced, and the sampling module 410 is disposed on the first circuit board 310 and can effectively sample the environment inside the housing 100.

The vertical direction of the wall portion 101 is a direction of a space between a side of the wall portion 101 facing the inside of the housing 100 and a side of the wall portion 101 facing the outside of the housing 100, and the lateral direction of the wall portion 101 is a direction perpendicular to the vertical direction.

Optionally, as shown in fig. 13, the orthographic projections of the first circuit board 310 and the second circuit board 320 on a plane parallel to the wall 101 completely coincide, according to some embodiments of the present application.

The first circuit board 310 and the second circuit board 320 are disposed opposite to each other on two sides of the wall portion 101, and the front projections of the two on a plane parallel to the wall portion 101 may be completely coincident. The first circuit board 310 and the second circuit board 320 are disposed at the same positions on two sides of the wall portion 101, and the orthographic projection areas of the first circuit board 310 and the second circuit board 320 on the plane parallel to the wall portion 101 are equal, so that on one hand, the first circuit board 310 and the second circuit board 320 are convenient to mount and dismount, and on the other hand, occupation of the transverse area of the wall portion 101 by the first circuit board 310 and the second circuit board 320 is reduced.

Alternatively, as shown in fig. 14, the orthographic projection of the first circuit board 310 and the second circuit board 320 on a plane parallel to the wall portion 101 is located within the orthographic projection of the other.

The first circuit board 310 and the second circuit board 320 are disposed opposite to each other on two sides of the wall portion 101, and the orthographic projection of one of the two orthographic projections on a plane parallel to the wall portion 101 may be located within the orthographic projection of the other. The orthographic projection areas of the first circuit board 310 and the second circuit board 320 on the plane parallel to the wall portion 101 are unequal, the orthographic projection area of one is larger than that of the other, and the smaller orthographic projection area is arranged in the orthographic projection range of the larger orthographic projection area of the other wall portion 101, so that on one hand, the first circuit board 310 and the second circuit board 320 can be conveniently mounted and dismounted, and on the other hand, the two circuit boards are stacked to be beneficial to reducing the occupation of the first circuit board 310 and the second circuit board 320 to the transverse area of the wall portion 101.

According to some embodiments of the present application, optionally, as shown in fig. 13 and 14, the battery cell 1 includes a connection assembly 600, where the connection assembly 600 is disposed through the wall portion 101 and electrically connected to the first circuit board 310 and the second circuit board 320, respectively.

The connecting assembly 600 is arranged on the wall portion 101 in a penetrating manner, so that corresponding positioning can be performed for mounting of the first circuit board 310 and the second circuit board 320, and the connecting assembly 600 is arranged on the wall portion 101, so that the structure is more stable, the electric connection between the first circuit board 310 and the second circuit board 320 is more stable, and information transmission can be realized through the connecting assembly 600 more stably.

Optionally, as shown in fig. 13 and 14, the connection assembly 600 includes a plurality of connection terminals 610, and the plurality of connection terminals 610 penetrate the wall portion 101 to extend from the inside of the housing 100 to the outside of the housing 100, according to some embodiments of the present application. The first circuit board 310 and the second circuit board 320 are electrically connected through a plurality of connection terminals 610.

The first circuit board 310 and the second circuit board 320 are electrically connected through the plurality of connection terminals 610, and the plurality of connection terminals 610 facilitate the mounting and the abutting of the first circuit board 310 and the second circuit board 320, so that the quick mounting and dismounting can be realized, and compared with the connection of wires, the assembly efficiency is improved, and the electrical safety can also be improved.

Optionally, as shown in fig. 12 and 15, the wall portion 101 is provided with a communication hole 106, and the connection assembly 600 is disposed through the communication hole 106, and the first circuit board 310 and/or the second circuit board 320 block the communication hole 106.

The communication hole 106 is formed in the wall portion 101, so that the connection assembly 600 is convenient to position, mount and detach, and the first circuit board 310 arranged in the housing 100 can transmit the state information in the housing 100 to the second circuit board 320 arranged outside the housing 100 through the connection assembly 600 penetrating through the communication hole 106, so that the state in the housing 100 is convenient to manage. By arranging the first circuit board 310 and the second circuit board 320 to block the communication hole 106, or arranging the first circuit board 310 or the second circuit board 320 to block the communication hole 106, the tightness of the wall part 101 can be improved, the probability of electrolyte leakage inside the casing 100 can be reduced, the influence of the environment outside the casing 100 on the inside of the casing 100 can be reduced, and the sampling accuracy of the sampling module 410 can be further improved.

According to some embodiments of the present application, optionally, as shown in fig. 16, the wall portion 101 is provided with a first mounting groove 107 communicating with the communication hole 106, the first mounting groove 107 faces the inside of the housing 100, and the first circuit board 310 is disposed in the first mounting groove 107 and blocks the communication hole 106.

The first mounting groove 107 may be used to mount the first circuit board 310, and the first mounting groove 107 may restrict the first circuit board 310 from moving in the lateral direction of the wall portion 101. The first circuit board 310 is disposed in the first mounting groove 107, which can reduce the occupied space of the first circuit board 310 outside the housing 100 or inside the housing 100, reduce the overall volume of the battery cell 1, and facilitate the improvement of the volumetric energy density. In addition, the first mounting groove 107 can also position and limit the first circuit board 310, so that the stability of the mounting structure of the first circuit board 310 is improved, and the reliability of the battery cell 1 is further improved. In addition, the first circuit board 310 blocks the communication hole 106 to facilitate the sealing of the housing 100.

According to some embodiments of the present application, optionally, as shown in fig. 16, the wall portion 101 is provided with a second mounting groove 108 communicating with the communication hole 106, the second mounting groove 108 faces away from the interior of the housing 100, and a second circuit board 320 is disposed in the second mounting groove 108 and blocks the communication hole 106.

The second mounting groove 108 may be used to mount the second circuit board 320, and the second mounting groove 108 may restrict lateral movement of the second circuit board 320 along the wall portion 101. The second circuit board 320 sets up in second mounting groove 108, can reduce the occupation space of second circuit board 320, and second mounting groove 108 can also fix a position and spacing second circuit board 320 moreover, improves the mounting structure stability of second circuit board 320, and then promotes the reliability of battery monomer 1. In addition, the second circuit board 320 blocks the communication hole 106 to facilitate the sealing of the housing 100.

According to some embodiments of the present application, optionally, as shown in fig. 6, 13 and 14, the battery cell 1 includes a functional circuit 700 disposed in the second region 302, the functional circuit 700 including at least one of a communication circuit 710 and an equalization circuit 720. And/or the detection sensor 400 includes a conditioning module 420, and the conditioning module 420 is disposed in the second area 302.

The communication circuit 710 and the equalization circuit 720 may be disposed on the same side of the processor 500 as the second region 302, and may be electrically connected to the processor 500, respectively. The communication circuit 710 may obtain information from the processor 500 and pass it to the rest of the components. The equalization circuit 720 may be used to equalize the amounts of electricity between different battery cells 1 disposed in the same battery 100a, and the manner of equalizing the amounts of electricity may be passive equalization or active equalization, for example.

By providing at least one of the communication circuit 710 and the equalization circuit 720 in the second region 302 exposed outside the case 100, it is possible to effectively reduce corrosion damage of the functional circuit 700 by the electrolyte, and reduce the risk of occurrence of short-circuiting or the like between the electrode assembly 200 and the functional circuit 700.

The conditioning module 420 may be disposed on the same side of the second region 302 as the processor 500 and may be electrically connected to the processor 500.

The sampling module 410 may acquire state information inside the case 100 and output a sampling signal corresponding to the state information inside the case 100. The sampled signals are often analog signals and are not suitable for use in data acquisition, control processes, performing computational display readout, and other applications. The conditioning module 420 may be used to convert the sampled signal into a digital signal, thereby enabling the state information inside the housing 100 to be analyzed and processed.

In addition, the sampled signal is often of a relatively small voltage, current, or variation, and the conditioning module 420 may include an amplification circuit that may be used to amplify the sampled signal prior to converting the sampled signal to a digital signal to improve the accuracy of the sampled signal when converted to the digital signal.

Optionally, the conditioning module 420 may further include a filtering circuit that may be used to low pass filter the sampled signal to eliminate noise and prevent aliasing.

By disposing the conditioning module 420 in the second region 302 exposed outside the casing 100, and disposing the conditioning module 420 in the second region 302, the corrosion damage of the electrolyte to the conditioning module 420 can be effectively reduced, and the risk of shorting between the electrode assembly 200 and the functional circuit 700 can be reduced.

Alternatively, the detection sensor 400 is a gas pressure sensor, a gas sensor, or a temperature sensor.

An air pressure sensor may be used to detect air pressure within the housing 100. A change in the gas pressure occurs during the operation of the battery cell 1, for example, gas is generated inside the case 100 or the temperature increases, resulting in a rapid increase in the gas pressure. By providing the detection sensor 400 as a gas pressure sensor, the gas pressure inside the housing 100 can be detected, which is advantageous in managing the operation state of the battery cell 1.

The gas sensor may be used to detect a gas constituent within the enclosure 100, such as H2, CO2, or an organic gas. During operation of the battery cell 1, some gases may be generated, such as one or more of H2, CO2 and organic gases. By providing the detection sensor 400 as a gas sensor, the concentration of one or more gases inside the housing 100 can be detected, which is advantageous for managing the operation state of the battery cell 1.

A temperature sensor may be used to detect the temperature within the enclosure 100. A change in temperature, for example, a temperature increase, occurs during the operation of the battery cell 1. By providing the detection sensor 400 as a temperature sensor, the temperature inside the housing 100 can be detected, which is advantageous in managing the operating state of the battery cell 1.

Optionally, as shown in fig. 3 and 4, the housing 100 may include a shell 110 and an end cap 120, and the shell 110 may be provided with an open end 111, according to some embodiments of the present application. An end cap 120 may cover the open end 111. The electrode assembly 200 may be disposed inside the case 110. In some embodiments, the end cap 120 may act as the wall 101. In other embodiments, a portion of the housing 110 may also form the wall 101. The battery cell 1 includes two electrode columns 800 disposed at intervals, the two electrode columns 800 are electrically connected with the electrode assembly 200, the two electrode columns 800 are disposed through the end cover 120, and the circuit board assembly 300 is disposed between the two electrode columns 800.

The open end 111 may be provided with the opening 112. The end cap 120 may serve to position the two electrode columns 800. Specifically, one end of the electrode column 800 is disposed toward the inside of the case 100 and can be used to electrically connect the electrode assembly 200 disposed in the case 100, and the other end of the electrode column 800 is disposed toward the outside of the case 100 and can be connected to the outside, so that the electrode assembly 200 can be charged and discharged through the electrode column 800.

By disposing the circuit board assembly 300 between the two electrode posts 800, the likelihood of the circuit board assembly 300 interfering with the electrode posts 800 is reduced, reducing the risk of shorting or the like of the circuit board assembly 300 due to contact with the electrode posts 800. And the space between the electrode columns 800 of the wall part 101 can be effectively utilized, and the space utilization rate can be improved. Further, the two electrode posts 800 may be a positive electrode post and a negative electrode post, respectively.

According to some embodiments of the present application, optionally, as shown in fig. 3 to 11, the battery cell 1 includes a case 100, an electrode assembly 200, a circuit board assembly 300, a detection sensor 400, and a processor 500. The electrode assembly 200 is disposed inside the case 100. The circuit board assembly 300 is disposed on the housing 100, and the circuit board assembly 300 includes a first area 301 and a second area 302, wherein the first area 301 is exposed inside the housing 100, and the second area 302 is exposed outside the housing 100. The detection sensor 400 includes a sampling module 410, and the sampling module 410 is disposed in the first area 301. The processor 500 is disposed in the second region 302. The housing 100 includes a wall portion 101, and the wall portion 101 is provided with a mounting hole 102 communicating the inside of the housing 100 with the outside of the housing 100. The circuit board assembly 300 includes a first circuit board 310, the first circuit board 310 blocking the mounting hole 102. The first region 301 is located on a side of the first circuit board 310 facing the interior of the housing 100, and the second region 302 is located on a side of the first circuit board 310 facing away from the interior of the housing 100. The first circuit board 310 is disposed in the mounting hole 102, and the shape of the mounting hole 102 is matched with the shape of the first circuit board 310, so that the mounting hole 102 is used for mounting and positioning the first circuit board 310. The mounting hole 102 includes a first hole section 103 and a second hole section 104 communicating with each other, the first hole section 103 is closer to the inside of the housing 100 than the second hole section 104, and a joint of the first hole section 103 and the second hole section 104 is formed with a support mesa 105 facing the second hole section 104. At least a portion of the first circuit board 310 is disposed in the second hole section 104 and supported by the support mesa 105. At least part of the sampling module 410 is located within the first bore section 103. The first circuit board 310 is soldered to the wall portion 101. The first circuit board 310 includes a metal substrate 311, and the metal substrate 311 is soldered to the wall portion 101. Alternatively, the first circuit board 310 includes a substrate body 312 and a metal frame 313, the metal frame 313 is fixed around the outer periphery of the substrate body 312, and the metal frame 313 is welded to the wall 101. The battery cell 1 includes a functional circuit 700 provided in the second region 302, and the functional circuit 700 includes at least one of a communication circuit 710 and an equalization circuit 720. And/or the detection sensor 400 includes a conditioning module 420, and the conditioning module 420 is disposed in the second area 302. The case 100 includes a case 110 provided with an open end 111, and an end cap 120 covering the open end 111, the end cap 120 forming a wall portion 101, and an electrode assembly 200 disposed inside the case 110. The battery cell 1 includes two electrode columns 800 disposed at intervals, the two electrode columns 800 are electrically connected with the electrode assembly 200, the two electrode columns 800 are disposed through the end cover 120, and the circuit board assembly 300 is disposed between the two electrode columns 800.

According to some embodiments of the present application, optionally, as shown in fig. 3, 4, and 12 to 16, the battery cell 1 includes a case 100, an electrode assembly 200, a circuit board assembly 300, a detection sensor 400, and a processor 500. The electrode assembly 200 is disposed inside the case 100. The circuit board assembly 300 is disposed on the housing 100, and the circuit board assembly 300 includes a first area 301 and a second area 302, wherein the first area 301 is exposed inside the housing 100, and the second area 302 is exposed outside the housing 100. The detection sensor 400 includes a sampling module 410, and the sampling module 410 is disposed in the first area 301. The processor 500 is disposed in the second region 302. The housing 100 includes a wall portion 101, and the circuit board assembly 300 includes a first circuit board 310 and a second circuit board 320 separated from each other. The first circuit board 310 and the second circuit board 320 are disposed opposite to each other on both sides of the wall portion 101, and the first circuit board 310 and the second circuit board 320 are electrically connected. The first region 301 is located on a first circuit board 310 and the second region 302 is located on a second circuit board 320. The first circuit board 310 is disposed inside the housing 100, and the second circuit board 320 is disposed outside the housing 100. The orthographic projections of the first circuit board 310 and the second circuit board 320 on a plane parallel to the wall portion 101 are completely coincident, or the orthographic projection of one is located within the orthographic projection of the other. The battery cell 1 includes a connection assembly 600, and the connection assembly 600 is disposed through the wall portion 101 and electrically connected to the first circuit board 310 and the second circuit board 320, respectively. The connection assembly 600 includes a plurality of connection terminals 610, and the plurality of connection terminals 610 penetrate the wall portion 101 to extend from the inside of the housing 100 to the outside of the housing 100. The first circuit board 310 and the second circuit board 320 are electrically connected through a plurality of connection terminals 610. The wall portion 101 is provided with a communication hole 106, and the connection assembly 600 is arranged through the communication hole 106, and the first circuit board 310 and/or the second circuit board 320 block the communication hole 106. The wall portion 101 is provided with a first mounting groove 107 communicating with the communication hole 106, the first mounting groove 107 faces the inside of the housing 100, and the first circuit board 310 is provided in the first mounting groove 107 and closes the communication hole 106. The wall portion 101 is provided with a second mounting groove 108 communicating with the communication hole 106, the second mounting groove 108 faces away from the interior of the housing 100, and a second circuit board 320 is disposed in the second mounting groove 108 and seals the communication hole 106. The battery cell 1 includes a functional circuit 700 provided in the second region 302, and the functional circuit 700 includes at least one of a communication circuit 710 and an equalization circuit 720. And/or the detection sensor 400 includes a conditioning module 420, and the conditioning module 420 is disposed in the second area 302. The case 100 includes a case 110 provided with an open end 111, and an end cap 120 covering the open end 111, the end cap 120 forming a wall portion 101, and an electrode assembly 200 disposed inside the case 110. The battery cell 1 includes two electrode columns 800 disposed at intervals, the two electrode columns 800 are electrically connected with the electrode assembly 200, the two electrode columns 800 are disposed through the end cover 120, and the circuit board assembly 300 is disposed between the two electrode columns 800.

According to some embodiments of the present application, as shown in fig. 2, a battery 100a includes the above-described battery cell 1. By such arrangement, the compactness and the integration of the structure of the battery cell 1 can be improved by reducing the occupied area of the circuit board assembly 300 and the occupied area of the circuit board assembly 300 on the outer shell 100, so that the stability and the reliability of the battery cell 1 during operation can be improved, and the stability and the reliability of the battery 100a during operation can be further improved.

According to some embodiments of the present application, as shown in fig. 1, the power consumption device includes the battery 100a described above. By such arrangement, the stability and reliability of the battery 100a during operation can be improved by improving the stability and reliability of the battery cell 1 during operation, and the stability and reliability of the power utilization device during operation can be further improved.

In summary, the embodiment of the present application can reduce the occupied area of the circuit board assembly 300, reduce the occupied area of the circuit board assembly 300 on the housing 100, and improve the compactness and integration of the structure of the battery cell 1, thereby improving the stability of the operation of the battery cell 1.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective 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

1. A battery cell, comprising:

a housing;

an electrode assembly disposed inside the case;

the circuit board assembly is arranged on the shell and comprises a first area and a second area, wherein the first area is exposed out of the shell, and the second area is exposed out of the shell;

the detection sensor comprises a sampling module, wherein the sampling module is arranged in the first area;

and the processor is arranged in the second area.

2. The battery cell of claim 1, wherein the battery cell comprises a plurality of cells,

the shell comprises a wall part, and the wall part is provided with a mounting hole for communicating the inside of the shell with the outside of the shell; the circuit board assembly comprises a first circuit board, and the first circuit board seals the mounting hole; the first area is positioned on one side of the first circuit board facing the inside of the shell; the second region is located on a side of the first circuit board facing away from the interior of the housing.

3. The battery cell of claim 2, wherein the battery cell comprises a plurality of cells,

the first circuit board is arranged in the mounting hole, and the shape of the mounting hole is matched with that of the first circuit board, so that the mounting hole is used for mounting and positioning the first circuit board.

4. The battery cell according to claim 2 or 3, wherein,

the mounting hole comprises a first hole section and a second hole section which are communicated with each other, the first hole section is closer to the inside of the shell than the second hole section, and a supporting table surface facing the second hole section is formed at the joint of the first hole section and the second hole section; at least part of the first circuit board is arranged on the second hole section and supported on the supporting table board.

5. The battery cell of claim 4, wherein the battery cell comprises a plurality of cells,

at least a portion of the sampling module is located within the first bore section.

6. The battery cell of claim 2, wherein the battery cell comprises a plurality of cells,

the first circuit board is welded and fixed with the wall part.

7. The battery cell of claim 6, wherein the battery cell comprises a plurality of cells,

the first circuit board comprises a metal substrate, and the metal substrate is welded and fixed with the wall part; or, the first circuit board comprises a substrate main body and a metal frame, the metal frame is sleeved and fixed on the outer periphery of the substrate main body, and the metal frame is welded and fixed with the wall part.

8. The battery cell of claim 1, wherein the battery cell comprises a plurality of cells,

The shell comprises a wall part, the circuit board assembly comprises a first circuit board and a second circuit board which are separated from each other, and the first circuit board and the second circuit board are oppositely arranged at two sides of the wall part; the first circuit board is electrically connected with the second circuit board; the first area is positioned on the first circuit board, and the second area is positioned on the second circuit board; the first circuit board is arranged inside the shell, and the second circuit board is arranged outside the shell.

9. The battery cell of claim 8, wherein the battery cell comprises a plurality of cells,

the orthographic projections of the first and second circuit boards on a plane parallel to the wall portion are completely coincident, or the orthographic projection of one is located within the orthographic projection of the other.

10. The battery cell of claim 8, wherein the battery cell comprises a plurality of cells,

the battery cell also comprises a connecting component, wherein the connecting component penetrates through the wall part and is electrically connected with the first circuit board and the second circuit board respectively.

11. The battery cell of claim 10, wherein the battery cell comprises a plurality of cells,

the connecting assembly comprises a plurality of connecting terminals which penetrate through the wall part to extend from the inside of the shell to the outside of the shell; the first circuit board and the second circuit board are electrically connected through the plurality of connection terminals.

12. The battery cell of claim 10, wherein the battery cell comprises a plurality of cells,

the wall part is provided with a communication hole, and the connecting component is arranged in the communication hole in a penetrating way; the first circuit board and/or the second circuit board block the communication hole.

13. The battery cell of claim 12, wherein the battery cell comprises a plurality of cells,

the wall part is provided with a first mounting groove communicated with the communication hole, the first mounting groove faces the inside of the shell, and the first circuit board is arranged in the first mounting groove and seals the communication hole.

14. The battery cell according to claim 12 or 13, wherein,

the wall part is provided with a second mounting groove communicated with the communication hole, and the second mounting groove is away from the inside of the shell; the second circuit board is arranged in the second mounting groove and seals the communication hole.

15. The battery cell of claim 1, wherein the battery cell comprises a plurality of cells,

the battery cell includes a functional circuit disposed in the second region, the functional circuit including at least one of a communication circuit and an equalization circuit; and/or, the detection sensor comprises a conditioning module, and the conditioning module is arranged in the second area.

16. The battery cell of claim 2, wherein the battery cell comprises a plurality of cells,

the shell comprises a shell body and an end cover, wherein the shell body is provided with an opening end, the end cover is covered on the opening end, and the end cover forms the wall part; the electrode assembly is arranged inside the shell; the battery cell comprises two electrode columns arranged at intervals, the two electrode columns are electrically connected with the electrode assembly, the two electrode columns penetrate through the end cover, and the circuit board assembly is located between the two electrode columns.

17. A battery comprising a cell according to any one of claims 1-16.

18. An electrical device comprising the battery of claim 17.