Exhaust detection equipment and control method thereof, manufacturing method of battery cell, battery and power utilization device

Abstract

The invention discloses exhaust detection equipment, and relates to the field of battery manufacturing, the exhaust detection equipment is used for performing exhaust detection on a battery cell, the battery cell is provided with an openable liquid injection port valve, and the liquid injection port valve can be opened under the action of a first acting force; the exhaust detection equipment comprises a fixing device used for bearing and fixing a battery cell; a fluid channel is formed in the air exhaust head; the air extracting and pressure measuring device is communicated with the fluid channel and can extract air in the battery cell through the fluid channel and detect the air pressure of the extracted air; the driving device is used for generating relative movement between the air exhaust head and the fixing device, so that the air exhaust head can apply the first acting force to the liquid injection port valve, and the fluid channel is communicated with the liquid injection port, the air exhaust detection equipment can open the liquid injection port valve and exhaust air in the battery cell, and the use performance and the safety performance of the battery cell are improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing, and in particular to an exhaust detection device and a control method thereof, a method for manufacturing a battery cell, a battery, and an electrical device. Background Art

[0002] Formation is a process in the battery cell manufacturing process. After the battery cell is formed by packaging, the ions in the electrolyte need to undergo an oxidation-reduction reaction between the positive and negative electrodes through the action of an external current. During the electrochemical forming process, gases will be generated inside the battery cell. These gases will affect the battery's performance and even its safety performance.

[0003] Application Contents

[0004] The present application provides an exhaust detection device and a control method thereof, a battery cell manufacturing method, a battery and an electrical device, which can discharge the gas generated in the battery cell, thereby solving the technical problem of how to improve the battery's performance and battery safety performance.

[0005] In the first aspect, an embodiment of the present application provides an exhaust detection device, which is used to perform exhaust detection on a battery cell, wherein the battery cell has an openable liquid injection valve, and the liquid injection valve can be opened under the action of a first force; the exhaust detection device includes a fixing device, a vacuum head, a vacuum pressure measuring device and a driving device, the fixing device is used to support and fix the battery cell; the vacuum head has a fluid channel; the vacuum pressure measuring device is connected to the fluid channel, and can extract gas from the battery cell through the fluid channel and detect the air pressure of the extracted gas; the driving device is used to generate relative movement between the vacuum head and the fixing device, so that the vacuum head can apply the first force shown to the liquid injection valve, and connect the fluid channel with the liquid injection port.

[0006] By setting a driving device, the vacuum head can generate relative movement with the fixing device, so that the vacuum head can apply a first force to the liquid injection valve of the battery cell, and push the liquid injection valve open through the first force, so that the fluid channel of the vacuum head can be connected with the liquid injection port of the battery cell. In this state, the vacuum pressure measuring device can extract the gas generated in the battery cell during the formation process through the vacuum head, that is, it can discharge the gas generated in the battery cell with the liquid injection valve, reducing the possibility that the gas in the battery cell will affect the performance and safety performance of the battery; moreover, the vacuum pressure measuring device can also detect the pressure of the extracted gas, so as to determine whether the liquid injection valve is normally opened and whether the gas in the battery cell is normally discharged through the change in air pressure, further improving the exhaust reliability of the battery cell.

[0007] In some embodiments, when the exhaust detection device is in use, the liquid filling port is located at the top of the battery cell, and the exhaust head is located above the liquid filling port valve.

[0008] By locating the liquid filling port at the top of the battery cell, during the process of venting the battery cell through the exhaust detection equipment, the electrolyte in the battery cell can be located on the side away from the liquid filling port under the action of gravity, thereby reducing the possibility of the electrolyte in the battery cell leaking from the liquid outlet and reducing the possibility of the electrolyte being extracted by the exhaust head.

[0009] In some embodiments, the driving device is connected to the fixing device and is used to drive the fixing device to move relative to the vacuum head. By making the driving device drive the fixing device to move, the vacuum head and the vacuum side can be kept in contact.

[0010] In some embodiments, the drive device is configured to generate relative translational motion between the vacuum head and the fixture. By causing the vacuum head and / or the fixture to perform linear motion, the vacuum head is aligned with the liquid injection valve of the battery cell fixed to the fixture while the vacuum head and the fixture are relatively stationary, thereby enabling the vacuum head to push open the liquid injection valve of the battery cell while the vacuum head and the fixture are in relative linear motion. This simplifies the positioning and motion control difficulty of the vacuum head and / or the fixture.

[0011] In some embodiments, a fixture is used to support the battery cell. The fixture has positioning blocks, with at least one pair of positioning blocks located on either side of the battery cell in the horizontal direction, wherein the horizontal direction is perpendicular to the vertical direction. By securing the battery cell above the fixture and supporting the battery cell via the fixture, the fixture can more reliably withstand the weight of the battery cell. Furthermore, limiting the vertical movement of the battery cell relative to the fixture by supporting the battery cell can simplify the structure of the fixture. Furthermore, the positioning blocks further limit the horizontal movement of the battery cell relative to the fixed structure in at least one horizontal direction, thereby enabling the vacuum head to more reliably align with the liquid injection valve of the battery cell.

[0012] In some embodiments, when the driving device is connected to the fixing device, the fixing device includes: a movable portion connected to the driving device and capable of lifting and lowering between an initial position and an exhaust position under the drive of the driving device, wherein the exhaust head is capable of applying the first force shown to the liquid filling valve at the exhaust position; wherein a positioning block is disposed on the movable portion and protrudes from the top surface of the movable portion. When the driving device is connected to the movable portion of the fixing device and drives the movable portion to perform lifting and lowering movements, by disposing the positioning block on the movable portion, the positioning block can be lifted and lowered along with the movable portion, thereby enabling the positioning block to still limit the horizontal movement of the battery cell during the lifting of the movable portion, thereby improving the reliability of the fixing device in positioning the battery cell.

[0013] In some embodiments, the fixture further comprises a transmission structure configured to drive the battery cell to move horizontally and between at least one pair of positioning blocks. The provision of the transmission structure enables the exhaust pressure measurement device to be applied to a battery cell production line and enables online exhaust of the battery cells, thereby increasing the degree of automation in exhausting the battery cells.

[0014] In some embodiments, at least one pair of positioning blocks is located on both sides of the battery cell in a first direction; in a second direction, a transmission structure is located on at least one side of the positioning block and is used to drive the battery cell to move in the second direction, the second direction being perpendicular to the first direction. By arranging the transmission structure on one side of the positioning block in the second direction and causing the transmission structure to drive the battery cell in the second direction, the possibility of the battery cell being blocked by the positioning blocks during the process of the transmission structure transporting the battery cell can be reduced, and the positioning blocks can be lowered without the need for the movable portion to move up and down, allowing the positioning blocks to avoid the battery cell being transported by the transmission structure. By arranging the transmission structure on one side of the positioning block in the second direction and causing the transmission structure to drive the battery cell in the second direction, the possibility of the battery cell being blocked by the positioning blocks during the process of the transmission structure transporting the battery cell can be reduced, and the positioning blocks can be lowered without the need for the movable portion to move up and down, allowing the positioning blocks to avoid the battery cell being transported by the transmission structure.

[0015] In some embodiments, the fixing device further includes: a fixed portion movably connected to the movable portion, and when the movable portion is in the initial position, the top surface of the fixed portion is not lower than the top surface of the movable portion. The movable portion in the exhaust detection device provided in the embodiment of the present application can be driven by the driving device to move up and down between the initial position and the exhaust position, and in the initial position when not lifted, the top surface of the movable portion is not higher than the top surface of the fixed portion. Therefore, when the movable portion has not been lifted, the battery cell is reliably supported by the top surface of the movable portion and the top surface of the fixed portion, or by the top surface of the fixed portion, thereby improving the reliability of the fixing device in supporting the battery cell.

[0016] In some embodiments, when the movable portion is in the initial position, the top surface of the positioning block is lower than the top surface of the fixed portion. By setting the initial position so that the top surface of the movable portion and the top surface of the positioning block are both lower than the top surface of the fixed portion, the movable portion and the positioning block can be lowered to a position below the top surface of the fixed portion during the transfer of the battery cells, thereby avoiding the battery cells during the transfer. Moreover, because the top surface of the positioning block is lower than the top surface of the fixed portion in the initial position, the possibility of the positioning block colliding with the battery cells during the transfer can be reduced without setting an additional avoidance position to further lower the movable portion, thereby simplifying the control difficulty of the lifting movement.

[0017] In some embodiments, there are multiple movable parts, and in the horizontal direction, the movable parts are located on both sides of the fixed part; there are multiple driving devices, and the driving devices are respectively connected to the movable parts located on both sides of the fixed part.

[0018] By arranging multiple movable parts on both sides of the fixed part and driving them separately through multiple driving devices, the movable parts located on both sides of the fixed part and the positioning blocks located on the movable parts can be raised and lowered asynchronously, so that the positioning blocks can be controlled to descend and avoid according to the actual position of the battery cells during the transmission process, thereby improving the freedom of avoidance control.

[0019] In some embodiments, at least one pair of positioning blocks are located on both sides of the battery cell in the first direction; in the first direction, the transmission structure is located on the outside of the positioning blocks, and the outside is the other side opposite to one side between the two positioning blocks.

[0020] When the positioning block is arranged on the movable part, the transmission structure and the positioning block can be spaced apart along the first direction, so that the size of the fixing device in the second direction can be reduced while reducing the possibility of collision between the battery cell and the positioning block during transmission by lifting and lowering the movable part.

[0021] In some embodiments, multiple exhaust heads are provided, capable of applying a first force to the liquid injection valves of multiple battery cells. By providing multiple exhaust heads, each exhaust head can apply a first force to the liquid injection valves of multiple battery cells, thereby pushing open the liquid injection valves of each battery cell and extracting gas from each battery cell through the liquid injection port. In other words, the exhaust detection device can simultaneously exhaust multiple battery cells, thereby improving the operating efficiency of the exhaust detection device.

[0022] In some embodiments, the exhaust detection device further includes: a containing box having a containing space for containing a plurality of battery cells, and an opening of the containing space faces the exhaust head; wherein the fixing device is used to connect with the containing box.

[0023] The housing box accommodates multiple battery cells, that is, the housing box allows the multiple battery cells to be moved as a whole. Furthermore, the housing box bears the force applied by the fixing device, eliminating the need for the fixing device to directly act on the battery cells, thereby achieving protection for the battery cells. Optionally, the housing box includes a positioning structure within the housing space, which can limit the movement of the battery cells within the housing space.

[0024] In a second aspect, an embodiment of the present application also provides a control method for an exhaust detection device, which is applied to the exhaust detection device provided in the embodiment of the first aspect above, and the control method includes: controlling the fixing device to fix the battery cell at a preset position; controlling the driving device to generate relative movement between the vacuum head and the fixing device, and enabling the vacuum head to apply a first force to the liquid injection valve, and extract the gas in the battery cell through the vacuum head; obtaining the air pressure of the extracted gas by the vacuum pressure measuring device, and determining whether the battery cell is normally exhausted by the air pressure, wherein, when the maximum value of the air pressure is not less than the preset air pressure threshold, it is determined that the exhaust of the battery cell is normal, and when the maximum value of the air pressure is less than the preset air pressure threshold, it is determined that the exhaust of the battery cell is abnormal; controlling the driving device to return the vacuum head or the fixing device to the initial position.

[0025] By setting a driving device, the vacuum head can generate relative movement with the fixing device, so that the vacuum head can apply a first force to the liquid injection valve of the battery cell, and push the liquid injection valve open through the first force, so that the fluid channel of the vacuum head can be connected with the liquid injection port of the battery cell. In this state, the vacuum pressure measuring device can extract the gas generated in the battery cell during the formation process through the vacuum head, that is, it can discharge the gas generated in the battery cell with the liquid injection valve, reducing the possibility that the gas in the battery cell will affect the performance and safety performance of the battery; moreover, the vacuum pressure measuring device can also detect the pressure of the extracted gas, so as to determine whether the liquid injection valve is normally opened and whether the gas in the battery cell is normally discharged through the change in air pressure, further improving the exhaust reliability of the battery cell.

[0026] In a third aspect, an embodiment of the present application also provides a method for manufacturing a battery cell, which comprises: forming a battery cell by assembly and liquid injection, and charging the battery cell at a preset voltage and for a preset time, wherein the battery cell has an openable liquid injection valve, which can be opened under the action of a first force, and the first force is directed from the outside of the battery cell to the inside of the battery cell; exhausting the charged battery cell and detecting the exhaust status through the exhaust detection equipment provided in the embodiment provided in the first aspect above; sealing the liquid injection valve of the battery cell with normal exhaust to form a battery cell.

[0027] By setting a driving device so that the vacuum head can generate relative movement with the fixing device, the vacuum head can apply a first force to the liquid injection valve of the battery cell, and push the liquid injection valve open through the first force, so that the fluid channel of the vacuum head can be connected to the liquid injection port of the battery cell. In this state, the vacuum pressure measuring device can extract the gas generated in the battery cell during the formation process through the vacuum head, that is, it can discharge the gas generated in the battery cell with the liquid injection valve, reducing the possibility that the gas in the battery cell will affect the performance and safety performance of the battery; moreover, the vacuum pressure measuring device can also detect the pressure of the extracted gas, so as to determine whether the liquid injection valve is normally opened and whether the gas in the battery cell is normally discharged through the change in air pressure, further improving the exhaust reliability of the battery cell. At the same time, after the exhaust is completed, the liquid injection valve is sealed, so that the battery cell with the liquid injection valve is reliably closed, reducing the possibility of dust entering the battery cell and electrolyte leakage due to the opening of the liquid injection valve during the use of the battery cell.

[0028] In a fourth aspect, an embodiment of the present application further provides a battery, comprising at least one battery cell, which is manufactured by the manufacturing method provided in the embodiment of the first aspect above.

[0029] In a fifth aspect, an embodiment of the present application further provides an electrical device, which includes a battery as provided in the embodiment of the fourth aspect above.

[0030] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0032] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0033] Figure 2 Schematic diagram of the exploded structure of batteries according to some embodiments of the present application;

[0034] Figure 3 This is a schematic diagram of the structure of the battery cell in some embodiments of the present application;

[0035] Figure 4 This is a schematic diagram of the assembly of a battery cell and an exhaust detection device according to some embodiments of the present application;

[0036] Figure 5 This is a schematic diagram of the assembly of a fixing device and a driving device in the exhaust gas detection equipment of some embodiments of the present application;

[0037] Figure 6 A diagram showing the relative position relationship between a transmission structure and a positioning block in an exhaust gas detection device according to some embodiments of the present application;

[0038] Figure 7 A diagram showing the relative position relationship between another transmission structure and a positioning block in an exhaust gas detection device according to some embodiments of the present application;

[0039] Figure 8 This is a schematic diagram of the assembly of the mounting beam and the exhaust head in the exhaust detection equipment in some embodiments of the present application;

[0040] Figure 9 A flowchart of a control method for an exhaust gas detection device according to some embodiments of the present application;

[0041] Figure 10 Schematic diagram of the process of manufacturing a battery cell according to some embodiments of the present application.

[0042] The accompanying drawings in the specific implementation manner are as follows:

[0043] 1000. Vehicle;

[0044] 100, battery; 200, controller; 300, motor;

[0045] 10. Box body; 11. First part; 12. Second part;

[0046] 20. Battery cell; 21. Housing; 22. Electrode; 23. Liquid filling port; 24. Liquid filling port valve;

[0047] 30. Exhaust detection equipment;

[0048] 310. Fixing device; 311. Positioning block; 312. Moving part; 313. Transmission structure; 314. Fixed part; 315. Guide slope; 316. Frame; 317. Positioning pin;

[0049] 320. Vacuum head; 330. Vacuum pressure measuring device; 340. Driving device;

[0050] 350. Accommodation box; 351. Accommodation space;

[0051] 360. Crossbeam; 362. Through-groove; 363. Rib plate; 364. Bracket; 365. Right-angle connecting block. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0054] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0055] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0057] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0058] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0059] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0060] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0061] A power battery includes at least one battery cell. During the manufacturing process of a battery cell, after the electrode sheets are assembled, the electrolyte is injected, and the battery cell is packaged, the battery cell needs to be charged according to a predetermined schedule. In other words, the battery cell needs to be formed. During the initial charge, a reaction occurs at the solid-liquid interface between the electrode material and the electrolyte, forming a solid electrolyte interface membrane. Ions can freely embed and extract from the electrode material through the solid electrolyte interface membrane. The formation of the solid electrolyte interface membrane is crucial to the performance of the battery. The solid not only prevents the co-embedding of solvent molecules and avoids damage to the electrode material, but also effectively improves the battery's cycle performance and service life. During the formation process, gases are formed in the battery cell. These gases may form isolated cavities between the positive and negative electrodes, thereby affecting the performance of the battery cell. If too much gas is generated, it may also cause excessive gas pressure in the battery cell, affecting the safety performance of the battery. The gas generated in the battery cell needs to be discharged promptly through an exhaust device.

[0062] The relevant exhaust device extracts gas from the battery cell through the liquid injection port. To ensure that the exhaust device can more reliably extract gas from the battery cell, the exhaust head of the exhaust device and the liquid injection port of the battery cell need to remain relatively stationary. The applicant has discovered that for a new type of battery cell with a liquid injection port valve, if the relevant exhaust device is used to exhaust this new type of battery cell, the liquid injection port valve will block the exhaust head from extracting gas from the battery cell, resulting in the gas in the battery cell being unable to be discharged smoothly.

[0063] Based on the above considerations, in order to solve the technical problem of how to extract gas from a battery cell with a liquid injection port valve, the applicant conducted in-depth research on the new battery cell and found that the purpose of providing the liquid injection port valve at the liquid injection port is to isolate the interior and exterior of the battery cell when the battery cell is not performing a liquid injection operation. When the battery cell is performing a liquid injection operation, the liquid injection port valve can be opened by applying an external force to connect the interior and exterior of the battery cell, thereby allowing electrolyte to be injected into the battery cell through the liquid injection port. Based on the characteristics of the liquid injection port valve, the applicant overcame the technical prejudice of those skilled in the art that the vacuum head and the liquid injection port need to remain relatively stationary, and thus creatively proposed a new exhaust detection device, which includes a vacuum head and a drive device, the vacuum head having a vacuum head, a fluid channel within the vacuum head, and the drive device capable of causing the vacuum head and the battery cell to move relative to each other, thereby enabling the vacuum head to apply a force from the exterior of the battery cell to the interior of the battery cell on the liquid injection port valve, causing the vacuum head to push the liquid injection port valve open and connect the fluid channel of the vacuum head with the interior space of the battery cell.

[0064] At the same time, the exhaust detection equipment also includes an exhaust pressure measuring device connected to the fluid channel, and the exhaust pressure measuring device is connected to the fluid channel. When the exhaust head pushes the liquid injection valve open, the gas inside the battery cell is extracted through the fluid channel; the exhaust detection equipment can also detect the pressure of the exhausted gas, so as to detect whether the battery cell is exhausted normally through the detected air pressure. Specifically, if the maximum value of the detected air pressure is greater than the preset threshold, it means that the liquid injection valve is opened normally and the gas in the battery pack is discharged normally. If the maximum value of the detected air pressure is less than the preset threshold, it means that the liquid injection valve cannot be opened, resulting in the gas in the battery cell cannot be discharged normally. After the detection is completed, the battery cell that can be exhausted normally will be moved to the next workstation of the battery cell manufacturing production line and the exhausted battery cell will be volume-fixed and tested to form a battery cell, and the battery cell with abnormal exhaust will be moved to the abnormal port for processing or the battery cell with abnormal exhaust will be manually removed from the battery cell manufacturing production line online.

[0065] The exhaust detection equipment disclosed in the embodiment of the present application is applied to battery cells of battery cell manufacturing equipment. Specifically, the exhaust detection equipment is used to exhaust the battery cells during the manufacturing process of the battery cells. It should be noted that the exhaust detection equipment can be a workstation of the battery cell production line, and the battery cells of the previous workstation are transferred to the exhaust detection equipment through a transfer device. After the battery cells are exhausted online, the normally exhausted batteries are deconstructed and transferred to the next workstation through the transfer device. The exhaust detection equipment can also be an independent device. After the battery cells are assembled, injected and sealed through the production line, the battery cells are transported to the exhaust detection equipment, so as to exhaust the battery cells offline.

[0066] The manufacturing method of the battery cell disclosed in the embodiments of this application can be used to manufacture different battery cells, which can be suitable for different electrical devices. For example, the battery cell can be used in, but is not limited to, electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery cell and battery disclosed in this application can be used to form the electrical device. In this way, the gas in the battery cell obtained by the above manufacturing method can be properly discharged, thereby improving the performance and safety of the battery cell.

[0067] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0068] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0069] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000. For example, the battery 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0070] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0071] Please refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a housing 10 and battery cells 20, with the battery cells 20 housed within the housing 10. The housing 10 provides a storage space for the battery cells 20 and can have various structures. In some embodiments, the housing 10 can include a first portion 11 and a second portion 12, which overlap each other and together define a storage space for the battery cells 20. The second portion 12 can be a hollow structure with one end open. The first portion 11 can be a plate-like structure, with the first portion 11 overlapping the open side of the second portion 12, so that the first portion 11 and the second portion 12 together define a storage space. Alternatively, the first portion 11 and the second portion 12 can each be a hollow structure with one end open, with the open side of the first portion 11 overlapping the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can have various shapes, such as a cylinder or a rectangular parallelepiped.

[0072] In the battery 100, there can be multiple battery cells 20, and the multiple battery cells 20 can be connected in series, in parallel, or mixed. Mixed means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or mixed together, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 can also be a battery module in which multiple battery cells 20 are first connected in series, in parallel, or mixed, and the multiple battery modules are then connected in series, in parallel, or mixed to form a whole, and accommodated in the box 10. The battery 100 may also include other structures. For example, the battery 100 may also include a busbar component for achieving electrical connection between the multiple battery cells 20. Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes. The battery cell 20 refers to the smallest unit that makes up the battery, please refer to Figure 3 , Figure 3This is a schematic diagram of the structure of a battery cell 20. The battery cell 20 includes a housing 21 with a chamber inside. This chamber is used to hold electrolyte, positive electrode sheets, and negative electrode sheets. A separator is typically provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets that do not contain active material each constitute a tab, which is electrically connected to a post 22 on the housing 21 via an adapter. The positive and negative posts can be located together at one end of the main body or separately at opposite ends of the main body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole 22 connects the electrode terminal to form a current loop. The shell 21 has an injection port 23 connected to the accommodating cavity, and the injection port 23 is provided with an injection port valve 24. The injection port valve 24 is an elastic valve, which can seal the injection port 23 under the action of its own elasticity. During the transportation and stationary process of the battery cell, the injection port valve 24 can maintain the sealing of the injection port 23 through elastic force. During the manufacturing process of the battery cell 20, the injection port valve 24 can be opened under the action of a force directed from the outside of the accommodating cavity to the inside of the accommodating cavity for injection and exhaust. After the injection and exhaust are completed, the injection port 23 is sealed by a sealing nail, so that the injection port valve 24 cannot be opened during the use of the battery cell 20.

[0073] According to some embodiments of the present application, an exhaust detection device is provided. The exhaust detection device is applied to a battery cell and is used to perform exhaust detection on the battery cell. The battery cell is as follows: Figure 3 The intermediate state of the battery cell 20 in the production process can be understood as the structure of the battery cell 20 in which the liquid injection valve 24 is not yet sealed. Figure 4 The structure of the exhaust detection device is exemplified. The exhaust detection device 30 includes: a fixing device 310, an exhaust head 320, an exhaust pressure measuring device 330 and a driving device 340. The fixing device is used to connect with the battery cell; the exhaust head 320 has a fluid channel, and the exhaust head 320 can be connected to the storage cavity in the battery cell through the fluid channel; the exhaust pressure measuring device 330 is connected to the fluid channel, and when the fluid channel is connected to the storage cavity, the exhaust pressure measuring device 330 can extract the gas in the storage cavity through the fluid channel by generating negative pressure, and can detect the pressure of the extracted gas during the process of extracting the gas; the driving device 340 is used to generate relative movement between the exhaust head 320 and the fixing device 310, so that the exhaust head 320 can move to the position shown in FIG. Figure 3The liquid injection port valve 24 in the battery cell applies a first force and connects the fluid channel with the liquid injection port 23 of the battery cell. The first force is directed from the outside of the battery cell to the inside of the battery cell. The fixing device 310 is connected to the battery cell to limit the relative movement of the battery cell and the fixing device 310, thereby fixing the battery cell in a predetermined position, so that the vacuum head 320 can apply a first force to the liquid injection port valve 24 through relative movement with the fixing device 310. The structure of the fixing device 310 is different according to the relative position of the battery cell fixed to the fixing device 310 and the fixing device 310. For example, when the battery cell is located above the fixing device 310, the fixing device 310 includes a supporting plate for supporting the battery cell and a positioning block for positioning the battery cell. When the battery cell is located on the side of the fixing device 310, the fixing device 310 includes a clamping claw, which clamps the battery cell to achieve positioning of the battery cell.

[0074] The air extraction and pressure measuring device 330 is any device that can generate negative pressure and can measure pressure. Exemplarily, the air extraction and pressure measuring device 330 includes an air pump and a pressure gauge. The air pump is connected to the fluid channel of the air extraction head 320 through the air flow channel. The air pump can form a negative pressure inside during operation, thereby forming an air pressure difference between the air pump and the liquid injection port 23. When the fluid channel is connected to the liquid injection port 23, the gas in the battery cell can flow from the liquid injection port 23 through the connecting channel and the air flow channel and into the air pump under the action of the air pressure difference, so that the gas in the battery cell can be discharged. At the same time, the pressure gauge can measure the air pressure value in the air flow channel during the process of the gas flowing through the air flow channel. It should be noted that Figure 4 Only the air guide pipe of the air extraction and pressure measuring device 330 is shown, and the air extraction and pressure measuring device 330 also includes an air extraction structure and a pressure measuring structure connected to the air guide pipe.

[0075] The driving device 340 is any structure that can generate relative movement between the vacuum head 320 and the fixing device 310, and the relative movement can enable the vacuum head 320 to abut against the liquid injection valve 24 of the battery cell fixed by the fixing device 310, and can apply a first force to the liquid injection valve 24 through the vacuum head 320; according to the form of relative movement between the vacuum head 320 and the fixing device 310, the fixing device 310 can be a different structure. For example, when the fixing device 310 rotates and swings relative to the vacuum head 320, the driving device 340 includes a rotating motor, and the rotating shaft of the rotating motor is connected to the fixing device 310; for example, when the fixing device 310 moves horizontally relative to the vacuum head 320, the driving device 340 includes a linear cylinder, and the output shaft of the linear cylinder is connected to the vacuum head 320. It should be noted that the driving device 340 can be connected to the vacuum head 320 to keep the battery cell fixed to the fixing device 310 stationary, and drive the vacuum head 320 to move relative to the fixing device 310 through the driving device 340; the driving device 340 can also be connected to the fixing device 310 to keep the vacuum head 320 stationary, and drive the fixing device 310 and the battery cell to move relative to the vacuum head 320 through the driving device 340.

[0076] By setting up a driving device 340, the vacuum head can generate relative movement with the fixing device, so that the vacuum head 320 can apply a first force to the liquid injection valve 24 of the battery cell, and push the liquid injection valve 24 open through the first force, so that the fluid channel of the vacuum head 320 can be connected with the liquid injection port 23 of the battery cell. In this state, the vacuum pressure measuring device 330 can extract the gas generated in the battery cell during the formation process through the vacuum head 320, that is, it can discharge the gas generated in the battery cell with the liquid injection valve 24, reducing the possibility that the gas in the battery cell will affect the performance and safety performance of the battery; moreover, the vacuum pressure measuring device 330 can also detect the pressure of the extracted gas, thereby determining whether the liquid injection valve 24 is normally opened and whether the gas in the battery cell is normally discharged through the change in air pressure, further improving the exhaust reliability of the battery cell.

[0077] In some embodiments, combined Figure 3 and Figure 4 When the exhaust detection device 30 is in use, the liquid injection port 23 is located at the top of the battery cell, and the exhaust head 220 is located above the liquid injection port valve 24.

[0078] It can be understood that when the exhaust detection equipment 30 is in use, the battery cell is placed in a vertical position through the fixing device 310, and the liquid injection port 23 is located at the top of the battery cell, so that in the exhaust state, at the same time, the exhaust head 320 is adaptively set above the liquid injection port valve 24.

[0079] By locating the liquid injection port 23 at the top of the battery cell, during the process of venting the battery cell through the exhaust detection equipment 30, the electrolyte in the battery cell can be located on the side away from the liquid injection port 23 under the action of gravity, thereby reducing the possibility of the electrolyte in the battery cell leaking from the liquid outlet 23 and reducing the possibility of the electrolyte being extracted by the exhaust head 320.

[0080] In some embodiments, as Figure 4 As shown, the driving device 340 is connected to the fixing device 310, and is used to drive the fixing device 310 to move relative to the vacuum head 320, that is, to keep the vacuum head 320 stationary, and to drive the fixing device 310 and the battery cell fixed to the fixing device 310 to move relative to the vacuum head 320 through the driving device 340.

[0081] It should be noted that the vacuum head 320 needs to be connected to the vacuum pressure measuring device 330 through a gas pipeline. If the vacuum head 320 needs to be driven to move separately, it is necessary to make the vacuum head 320 and the vacuum pressure measuring device 330 move relative to each other, which is not conducive to maintaining air tightness between the vacuum head 320 and the vacuum pressure measuring device 330. By making the driving device 340 drive the fixing device 310 to move, it is possible to make relative movement between the fixing device 310 and the vacuum head 320 while maintaining the air tightness between the vacuum head 320 and the vacuum pressure measuring device 330.

[0082] In some embodiments, as Figure 4 As shown, the driving device 340 is used to generate relative translation between the vacuum head 320 and the fixing device 310, that is, the driving device 340 can generate linear motion between the vacuum head 320 and / or the fixing device 310.

[0083] By making the vacuum head 320 and / or the fixing device 310 move linearly, when the vacuum head 320 and the fixing device 310 are in a relatively static state, the vacuum head 320 is aligned with the liquid injection valve 24 of the battery cell fixed to the fixing device 310, so that the vacuum head 320 can push open the liquid injection valve 24 of the battery cell when the vacuum head 320 and the fixing device 310 generate relative linear motion, that is, the positioning difficulty and motion control difficulty of the vacuum head 320 and / or the fixing device 310 are simplified.

[0084] In some embodiments, as Figure 4 As shown, the fixing device 310 is used to support the battery cell. At the same time, the fixing device 310 has positioning blocks 311. In the horizontal direction, at least one pair of positioning blocks 311 is located on both sides of the battery cell.

[0085] It can be understood that when the exhaust detection equipment 30 is in use, the battery cell is fixed above the fixing device 310, thereby limiting the movement of the battery cell 310 in the vertical direction relative to the fixing device 310 by bearing, and at the same time, the contact between at least one pair of positioning blocks 311 and the battery cell limits the movement of the battery cell in the horizontal direction relative to the fixing device 310, wherein the horizontal direction is perpendicular to the vertical direction.

[0086] By fixing the battery cell above the fixing device 310 and supporting the battery cell through the fixing device 310, the fixing device 310 can more reliably bear the gravity of the battery cell. Moreover, limiting the movement of the battery cell in the vertical direction relative to the fixing device 310 by supporting the battery cell can simplify the structure of the fixing device 310. At the same time, the positioning block 311 further limits the movement of the battery cell in the horizontal direction relative to the fixing device 310 in at least one direction in the horizontal direction, so that the vacuum head 320 can be more reliably aligned with the liquid filling valve 24 of the battery cell.

[0087] In some embodiments, see Figure 5 , Figure 5 An assembly diagram of a fixing device and a driving device provided in an embodiment of the present application, when the driving device 340 is connected to the fixing device 310, the fixing device 310 includes a movable part 312, and the movable part 312 is connected to the driving device so that the movable part 312 can be driven by the driving device 340 to move up and down between the initial position and the exhaust position, and at the exhaust position, the vacuum head 320 can apply a first force to the liquid injection valve 24.

[0088] At the same time, the positioning block 311 is arranged on the movable part 312, and the positioning block 311 protrudes from the top surface of the movable part 312, so that the side wall of the positioning block 311 facing the battery cell can contact the battery cell, thereby limiting the horizontal movement of the battery cell through the contact between the side wall and the battery cell.

[0089] When the driving device 340 is connected to the movable part 312 of the fixing device 310 and drives the movable part 312 to perform lifting movements, by arranging the positioning block 311 on the movable part 312, the positioning block 311 can be lifted and lowered together with the movable part 312, so that during the lifting of the movable part 312, the positioning block 311 can still limit the horizontal movement of the battery cell, thereby improving the reliability of the fixing device 310 in positioning the battery cell.

[0090] In some embodiments, combined Figure 4 and Figure 5 The fixing device 310 also includes a transmission structure 313, which is used to drive the battery cell to move in the horizontal direction and enable the battery cell to move between at least one pair of positioning blocks 311.

[0091] It can be understood that the exhaust pressure measuring device 300 is applied to a production line of battery cells, and the transmission structure 313 can transmit the battery cell from the previous workstation on the production line to between at least one pair of positioning blocks 311 of the fixture 310, thereby achieving positioning of the battery cell through the fixture 310. It should be noted that the transmission structure 313 is any structure capable of moving the battery cell. For example, the transmission structure 313 is a transmission roller, and the transmission structure 313 can also be a conveyor belt.

[0092] By providing the transmission structure 313 , the exhaust pressure measuring device 300 can be applied to a production line of battery cells and realize online exhaust of battery cells, thereby improving the degree of automation of exhausting the battery cells.

[0093] In some embodiments, see Figure 6 ,exist Figure 6 The first direction is indicated by a solid arrow, and the second direction is indicated by a dotted arrow. In the first direction, at least one pair of positioning blocks 311 are located on both sides of the battery cell; in the second direction, the transmission structure 313 is located on at least one side of the positioning block 311, and is used to drive the battery cell to move in the second direction.

[0094] The first direction and the second direction are both horizontal directions, that is, the first direction and the second direction are both perpendicular to the vertical direction, and the first direction and the second direction are perpendicular. It can be understood that the transmission structure 313 can transport the battery cells along the second direction to between at least one pair of positioning blocks 311.

[0095] By arranging the transmission structure 313 on one side of the positioning block 311 in the second direction and making the transmission structure 313 drive the battery cells along the second direction, the possibility of the battery cells being blocked by the positioning block 311 during the process of the transmission structure 313 transporting the battery cells can be reduced, and the positioning block 311 can be driven down without the need for the lifting movement of the movable part 312 to allow the positioning block 311 to avoid the battery cells being transported by the transmission structure 313.

[0096] In some embodiments, as Figure 5 As shown, the fixing device 310 further includes a fixing portion 314 , which is movably connected to the movable portion 312 , and when the movable portion 312 is in the initial position, the top surface of the fixing portion 314 is not lower than the top surface of the movable portion 312 .

[0097] It can be understood that the movable part 312 can move up and down between the initial position and the exhaust position under the drive of the driving device 340, and at the initial position where it is not lifted up, the top surface of the movable part 312 is not higher than the top surface of the fixed part 314. Therefore, when the movable part 312 has not been lifted up, the battery cell can be reliably supported by the top surface of the movable part 312 and the top surface of the fixed part 314, or by the top surface of the fixed part 314, thereby improving the reliability of the fixing device 310 in supporting the battery cell.

[0098] Optionally, when the movable part 312 is in the initial position, the top surface of the positioning block 311 can be higher than the top surface of the fixed part 314, so that the battery cell can also be positioned at the initial position, and when the battery cell needs to be avoided, it can also be driven by the driving device 340 to further descend from the initial position to the avoidance position, so that the top surface of the positioning block 311 is lower than the top surface of the fixed part 314.

[0099] In some embodiments, as Figure 5 As shown, when the movable portion 312 is located at the initial position, the top surface of the positioning block 311 is lower than the top surface of the fixed portion 314 .

[0100] By setting the initial position so that the top surface of the movable part 312 and the top surface of the positioning block 311 are both lower than the top surface of the fixed part 314, the movable part 312 and the positioning block 311 can be lowered to a position below the top surface of the fixed part 314 during the transmission of the battery cells, thereby avoiding the battery cells during the transmission process. Moreover, since the top surface of the positioning block 311 is lower than the top surface of the fixed part 314 at the initial position, the possibility of the positioning block 311 colliding with the battery cells during the transmission process can be reduced without setting an additional avoidance position to further lower the movable part, thereby simplifying the control difficulty of the lifting and lowering movement.

[0101] In some embodiments, as Figure 5 As shown, there are multiple movable parts 312, and in the horizontal direction, the movable parts 312 are located on both sides of the fixed part 314; there are multiple driving devices 340, and the driving devices 340 are respectively connected to the movable parts 312 located on both sides of the fixed part 314.

[0102] By arranging multiple movable parts 312 on both sides of the fixed part 314 and driving them respectively through multiple driving devices 340, the movable parts 312 located on both sides of the fixed part 314 and the positioning blocks 311 located on the movable parts 312 can be raised and lowered asynchronously, so that the positioning blocks 311 can be controlled to descend and avoid according to the actual position of the battery cells during the transmission process, thereby improving the freedom of avoidance control.

[0103] In some embodiments, as Figure 7 As shown, in Figure 7 The first direction is indicated by a solid arrow. When the movable part 312 of the fixing device 310 is connected to the driving device 340 and the positioning block 311 is set on the movable part 312, the transmission structure 313 is located outside the positioning block 311 in the first direction.

[0104] The space between the positioning blocks 311 spaced apart in the first direction is the inner side of the positioning block 311 , and the side opposite to the inner side is the outer side of the positioning block 311 .

[0105] When the positioning block 311 is arranged on the movable part 312, the transmission structure 313 and the positioning block 311 can be spaced apart along the first direction, so that the size of the fixing device 310 in the second direction can be reduced while the possibility of collision between the battery cell and the positioning block 311 during transmission can be reduced by raising and lowering the movable part 312. Optionally, in the first direction, multiple movable parts 312 are respectively located on both sides of the fixed part 314, and are respectively driven by different driving devices 340, so that each movable part 312 can be controlled to perform asynchronous lifting and lowering according to the position of the battery cell during the transmission process. Below, the transmission structure 313 is located on both sides of the outer side of the positioning block 311 in the first direction, and for the sake of convenience, the transmission direction of the battery cell is referred to as from left to right, and the movable part 312 can be lifted and lowered between the initial position and the exhaust position, and the movable part 312 can also be further lowered from the initial position to the avoidance position. As an example, the asynchronous lifting process of the movable part is exemplified, wherein, at the initial position, the top surface of the fixed part 314 is not lower than the top surface of the movable part 312, the top surface of the positioning block 311 is higher than the top surface of the fixed part 314, and at the avoidance position, the top surface of the positioning block 311 is lower than the top surface of the fixed part 314.

[0106] In the process of the battery cell moving from the previous workstation to the left between the positioning blocks 311 through the transmission structure 313, the driving part controls the movable part 312 located on the left side of the fixed part 314 to descend to the avoidance position, and makes the movable part 312 on the right side of the fixed part 314 located in the initial position, so that the battery cell abuts against the positioning block 311 on the right; then the movable part 312 on the left side is lifted from the avoidance position to the initial position, so that the positioning block 311 on the left side abuts against the battery cell, thereby realizing the positioning of the battery cell by the positioning blocks 311 on the left and right sides of the battery cell; after the exhaust of the battery cell is completed, the movable part 312 is lowered from the exhaust position to the initial position and the movable part 312 on the right side is further lowered from the initial position to the avoidance position, so that the transmission structure 313 on the right side can transfer the exhausted battery cell to the next workstation. It should be noted that the transmission structure 313 can be a plurality of split structures, and the plurality of transmission structures 313 are located on at least one side of the outer side of the positioning block 311 in the first direction. The transmission structure 313 can also be a continuous transmission structure and extend from one side of the outer side of the positioning block 311 to the other side, and bypass the movable part 312 and the fixed part 314 from the bottom of the fixed part 314.

[0107] Optional, such as Figure 5 As shown, the top surface of the positioning block 311 has a guide slope 315, and the guide slope 315 faces the inner side of the positioning block 311, so that when the movable part 312 is lifted from the avoidance position to the initial position, the guide slope 315 can abut against the battery cell and apply a lateral force along the first direction to the battery cell through the guide slope 315, thereby pushing the battery cell to the position.

[0108] In some embodiments, combined Figure 3 and Figure 8 The exhaust head 320 has multiple exhaust heads, which can apply a first force to the liquid injection valves 24 of multiple battery cells.

[0109] By setting up multiple vacuum heads 320, each vacuum head 320 can apply a first force to the liquid injection valve 24 of multiple battery cells respectively, thereby pushing open the liquid injection valve 24 of each battery cell and extracting the gas in each battery cell through the liquid injection port 23. That is, the exhaust detection equipment can exhaust multiple battery cells at the same time, thereby improving the working efficiency of the exhaust detection equipment 30.

[0110] In some embodiments, as Figure 4 As shown, the exhaust detection device 30 further includes a receiving box 350 having a receiving space 351 for receiving a plurality of battery cells. The opening of the receiving space 351 faces the exhaust head 320 , wherein the fixing device 310 is used to connect with the receiving box 350 .

[0111] The accommodating box 350 accommodates multiple battery cells, meaning that the accommodating box 350 allows the multiple battery cells to be moved as a whole. Furthermore, the accommodating box 350 supports the forces applied by the fixing device 310, eliminating the need for the fixing device 310 to directly act on the battery cells, thereby protecting the battery cells. Optionally, the accommodating box 350 includes a positioning structure within the accommodating space 351, which can limit the movement of the battery cells within the accommodating space 351.

[0112] In some embodiments, as Figure 4 As shown, the fixing device 310 also includes a frame 316, which is supported at the bottom of the movable part of the fixing device 310, and the transmission structure 313 is rotatably connected to the frame 316. The driving device 340 is connected to the movable part to form a lifting structure for driving the active battery cells to move up and down in the vertical direction. The storage box 350 is a hollow cube forming a tray. The lifting structure can drive the tray to move up and down, and the storage box 350 contains multiple battery cells. Two columns (or three columns) of multiple rows of battery cells are placed in the tray, and each battery cell has a liquid filling port switch valve. Each row of batteries corresponds to an exhaust pressure measuring assembly, and each exhaust pressure measuring assembly includes multiple exhaust heads, and the number of exhaust heads is the same as the number of battery cells in a row.

[0113] In some embodiments, as Figure 5 As shown, two positioning blocks 311 are respectively provided on both sides of the movable part 312, and the rough positioning of the battery cell is achieved by the positioning blocks 311, and the movable part 312 also has a positioning pin 317. Specifically, the positioning pin 317 can extend out of the top surface of the movable part 312, and the bottom surface of the accommodating box 350 has a positioning hole. After the accommodating box 350 is roughly positioned by the positioning block 311, the positioning hole is located near the positioning pin 317. In this state, the positioning pin 317 is extended out of the top surface of the movable part 312 and extended into the positioning hole, thereby achieving precise positioning of the accommodating box 350. Optionally, the top surface of the positioning pin 317 has an arc-shaped guide surface. In the process of extending the positioning pin 317 into the positioning hole, the arc-shaped guide surface can cause the accommodating box 350 to be laterally displaced, thereby fine-tuning the position of the accommodating box 350 and the battery cell accommodated in the accommodating box 350. Optionally, there are two positioning pins 317 , and the two positioning pins 317 are located at diagonal lines of the receiving box 350 , so that the receiving box 350 can be positioned more accurately.

[0114] In some embodiments, as Figure 8 As shown, the exhaust pressure measuring device further includes a mounting crossbeam 360, which is fixed to Figure 4The frame 316 in the figure has a plurality of circular mounting holes on the crossbeam 360, and an L-shaped through-slot 362 is provided on the side of the circular mounting hole. The circular mounting hole is used to install the vacuum head 320, and the through-slot 362 can cause the circular mounting hole to produce radial elastic deformation during the installation of the vacuum head 320, thereby facilitating the installation of the vacuum head 320. A rib 363 is provided on one side of the top of the mounting crossbeam 360, with the narrow side of the rib 363 facing downward and the length being substantially the same as the length of the mounting crossbeam 360, thereby strengthening the structural strength of the mounting crossbeam 360; a bracket 364 is provided at each end of the bottom of the mounting crossbeam 360, and a right-angle connecting block 365 is provided at the connection with the mounting crossbeam 360, thereby strengthening the structural strength of the connection between the bracket 364 and the mounting crossbeam 360. The bracket 364 is used to be fixedly connected to the fixed part of the fixing device 310 or to the frame.

[0115] The present application also provides a method for controlling an exhaust gas detection device. The control method is applied to Figures 4 to 8 The control method of the exhaust gas detection device shown in any one of the figures may be executed by the control unit of the exhaust gas detection device or by an external control system.

[0116] In some embodiments, as Figure 9 As shown, Figure 9 This is a flow chart of a control method for an exhaust gas detection device provided in an embodiment of the present application. The control method includes:

[0117] Step S101: Control the fixing device to fix the battery cell at a preset position.

[0118] It can be understood that the battery cell is positioned by the fixing device, the relative movement between the battery cell and the fixing device is restricted, and the battery cell is positioned to a position where the first force can be applied to the liquid injection valve of the battery cell through the vacuum head. For example, the battery cell is roughly positioned by the positioning block, and the battery cell is precisely positioned by the positioning pin, thereby positioning the battery cell to a predetermined position.

[0119] Step S102 : Control the driving device to generate relative movement between the vacuum head and the fixing device, so that the vacuum head can apply a first force to the liquid injection valve and extract the gas in the battery cell through the vacuum head.

[0120] It can be understood that the vacuum head can push open the liquid injection valve of the battery cell through the relative movement of the vacuum head and the battery cell. For example, the battery cell is lifted by the driving device so that the vacuum head can push open the liquid injection valve of the battery cell. In this state, the fluid channel in the vacuum head is connected to the liquid injection port, and the gas in the battery cell can be extracted through the vacuum head.

[0121] Step S103: The gas pressure of the extracted gas is obtained by the gas extraction pressure measuring device, and whether the battery cell is normally exhausted is determined by the gas pressure.

[0122] Among them, when the maximum air pressure is not less than the preset air pressure threshold, it is determined that the battery cell exhaust is normal, and when the maximum air pressure is less than the preset air pressure threshold, the battery cell exhaust is abnormal. It can be understood that the air extraction pressure measuring device can obtain the air pressure of the gas extracted by the exhaust head through the air pressure sensor. Near the moment when the liquid injection valve is opened by the exhaust head, the air pressure of the extracted gas will have a peak value, that is, the maximum air pressure. If the maximum air pressure is not less than the preset air pressure threshold, it means that the liquid injection valve is opened normally and the gas in the battery cell is discharged normally. If the maximum air pressure is less than the preset air pressure threshold, it means that the liquid injection valve is not opened normally, and the gas in the battery cell cannot be discharged smoothly, that is, the battery cell exhaust is abnormal.

[0123] Optionally, the vacuum pressure measuring device transmits the acquired air pressure data to the manufacturing execution system, and the manufacturing execution system determines whether the exhaust of the battery cell is normal. Batteries with normal exhaust can enter the next workstation for subsequent processing. Batteries with abnormal exhaust need to be moved to the abnormal processing port or manually processed online.

[0124] Step S104: Control the driving device to return the air extraction head or the fixing device to the initial position.

[0125] It can be understood that after the exhaust of the battery cells is completed, the exhaust head or the fixing device is moved to the initial position through the driving device, so that the exhaust detection equipment can continue to exhaust the next batch of battery cells.

[0126] By setting a driving device, the vacuum head can generate relative movement with the fixing device, so that the vacuum head can apply a first force to the liquid injection valve of the battery cell, and push the liquid injection valve open through the first force, so that the fluid channel of the vacuum head can be connected with the liquid injection port of the battery cell. In this state, the vacuum pressure measuring device can extract the gas generated in the battery cell during the formation process through the vacuum head, that is, it can discharge the gas generated in the battery cell with the liquid injection valve, reducing the possibility that the gas in the battery cell will affect the performance and safety performance of the battery; moreover, the vacuum pressure measuring device can also detect the pressure of the extracted gas, so as to determine whether the liquid injection valve is normally opened and whether the gas in the battery cell is normally discharged through the change in air pressure, further improving the exhaust reliability of the battery cell.

[0127] An embodiment of the present application also provides a method for manufacturing a battery cell, wherein the battery cell has an injection port, and the injection port is provided with an injection port valve. During the manufacturing process, the injection port valve can be opened under the action of a force from the outside to the inside, and after the manufacturing is completed, the injection port valve is sealed by a sealing nail.

[0128] In some embodiments, as Figure 10 As shown, Figure 10 A schematic flow chart of a method for manufacturing a battery cell provided in an embodiment of the present application, wherein the steps of the method include:

[0129] Step S201 : forming a battery cell by assembling and injecting liquid, and charging the battery cell at a preset voltage and for a preset time.

[0130] It can be understood that the positive electrode sheet and the negative electrode sheet are wound and assembled to form a battery shell with a accommodating cavity and an injection port, and the electrolyte is injected into the accommodating cavity through the injection port to form a battery cell. The injection port of the battery cell has an injection port valve, and then the battery cell is charged with a preset voltage and a preset time, so that the ions in the electrolyte can react with the electrode material on the surface of the electrode sheet through the external current, thereby forming a solid electrolyte interface film on the surface of the electrode sheet. The process of forming a solid electrolyte interface film by charging can be called formation, and gas will be generated inside the battery cell during the formation process.

[0131] Step S202: exhaust the charged battery cells and detect the exhaust status using exhaust detection equipment.

[0132] It can be understood that, through Figures 4 to 8 The exhaust detection device shown in any one of the figures exhausts the battery after formation, thereby exhausting the gas inside the battery generated during the formation process. Specifically, the liquid injection valve is pushed open by the relative movement of the exhaust head of the exhaust detection device and the battery cell, and the gas in the battery cell is extracted through the exhaust head, thereby achieving the exhaust of the battery cell with a liquid injection valve; moreover, the exhaust detection device also has an exhaust pressure measuring device that can detect the pressure of the extracted gas, and determines whether the battery is normally exhausted by the maximum pressure of the extracted gas, thereby improving the reliability of the exhaust and reducing the impact of the gas generated during the formation process on the performance and safety performance of the battery cell.

[0133] Step S203: Seal the liquid injection valve of the battery cell with normal exhaust to form a battery cell.

[0134] Specifically, the liquid filling valve is sealed by a sealing nail so that the liquid filling valve cannot be opened under the action of external force, thereby ensuring that the liquid filling valve is reliably closed in the battery cell, thereby reducing the possibility of dust entering the battery cell and electrolyte leakage due to the opening of the liquid filling valve during the use of the battery cell.

[0135] By setting a driving device so that the vacuum head can generate relative movement with the fixing device, the vacuum head can apply a first force to the liquid injection valve of the battery cell, and push the liquid injection valve open through the first force, so that the fluid channel of the vacuum head can be connected to the liquid injection port of the battery cell. In this state, the vacuum pressure measuring device can extract the gas generated in the battery cell during the formation process through the vacuum head, that is, it can discharge the gas generated in the battery cell with the liquid injection valve, reducing the possibility that the gas in the battery cell will affect the performance and safety performance of the battery; moreover, the vacuum pressure measuring device can also detect the pressure of the extracted gas, so as to determine whether the liquid injection valve is normally opened and whether the gas in the battery cell is normally discharged through the change in air pressure, further improving the exhaust reliability of the battery cell. At the same time, after the exhaust is completed, the liquid injection valve is sealed, so that the battery cell with the liquid injection valve is reliably closed, reducing the possibility of dust entering the battery cell and electrolyte leakage due to the opening of the liquid injection valve during the use of the battery cell.

[0136] According to some embodiments of the present application, the present application also provides a battery comprising the battery cell described in any of the above solutions.

[0137] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery described in any of the above schemes, and the battery is used to provide electrical energy to the electrical device.

[0138] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An exhaust detection device for performing exhaust detection on a battery cell, wherein the battery cell has an openable liquid injection valve, and the liquid injection valve can be opened under the action of a first force; characterized in that: The exhaust gas detection equipment includes: A fixing device, used for carrying and fixing the battery cell; A vacuum head having a fluid passage therein; a gas extraction and pressure measuring device, connected to the fluid channel, capable of extracting gas from the battery cell through the fluid channel and detecting the pressure of the extracted gas; The driving device is used to generate relative movement between the vacuum head and the fixing device, so that the vacuum head can apply the first force shown to the liquid injection port valve and connect the fluid channel with the liquid injection port.

2. The exhaust gas detection device according to claim 1, characterized in that: When the exhaust detection device is in use, the liquid injection port is located at the top of the battery cell, and the air extraction head is located above the liquid injection port valve.

3. The exhaust gas detection device according to claim 1 or 2, characterized in that: The driving device is connected to the fixing device and is used to drive the fixing device to move relative to the air extraction head.

4. The exhaust gas detection device according to claim 1 or 2, characterized in that: The driving device is used to generate relative translation between the vacuum head and the fixing device.

5. The exhaust gas detection device according to claim 2, characterized in that: The fixing device is used to support the battery core, and the fixing device has positioning blocks. In the horizontal direction, at least one pair of the positioning blocks is located on both sides of the battery core; wherein the horizontal direction is perpendicular to the vertical direction.

6. The exhaust gas detection device according to claim 5, characterized in that: When the driving device is connected to the fixing device, the fixing device includes: a movable portion connected to the driving device and capable of moving up and down between an initial position and an exhaust position under the drive of the driving device, wherein the exhaust head can apply the first force shown to the liquid injection port valve at the exhaust position; Wherein, the positioning block is arranged on the movable part and protrudes from the top surface of the movable part.

7. The exhaust gas detection device according to claim 5 or 6, characterized in that: The fixing device further comprises: The transmission structure is used to drive the battery core to move in the horizontal direction and can enable the battery core to move between at least one pair of positioning blocks.

8. The exhaust gas detection device according to claim 7, characterized in that: At least one pair of the positioning blocks is located on both sides of the battery core in the first direction; In the second direction, the transmission structure is located on at least one side of the positioning block, and is used to drive the battery cell to move in the second direction, and the second direction is perpendicular to the first direction.

9. The exhaust gas detection device according to claim 6, characterized in that: The fixing device further comprises: The fixed part is movably connected to the movable part, and when the movable part is located at the initial position, the top surface of the fixed part is not lower than the top surface of the movable part.

10. The exhaust gas detection device according to claim 9, characterized in that: When the movable part is located at the initial position, the top surface of the positioning block is lower than the top surface of the fixed part.

11. The exhaust gas detection device according to claim 10, characterized in that: There are multiple movable parts, and in the horizontal direction, the movable parts are located on both sides of the fixed part; there are multiple driving devices, and the driving devices are respectively connected to the movable parts located on both sides of the fixed part.

12. The exhaust gas detection device according to claim 10 or 11, characterized in that: At least one pair of the positioning blocks is located on both sides of the battery core in a first direction; in the first direction, the transmission structure is located on the outside of the positioning blocks, and the outside is the other side opposite to one side between the two positioning blocks.

13. The exhaust gas detection device according to claim 1, characterized in that: There are multiple air extraction heads, which can apply the first force to the liquid injection valves of multiple battery cells.

14. The exhaust gas detection device according to claim 13, characterized in that: The exhaust detection device further includes: A storage box having a storage space for storing a plurality of the battery cells, wherein an opening of the storage space faces the exhaust head; Wherein, the fixing device is used to be connected to the containing box.

15. A method for controlling an exhaust gas detection device, characterized in that: The control method is applied to the exhaust gas detection device according to any one of claims 1 to 14, and the control method includes: Controlling the fixing device to fix the battery cell at a preset position; Controlling the driving device to generate relative movement between the vacuum head and the fixing device, so that the vacuum head can apply the first force to the liquid injection valve and extract the gas in the battery cell through the vacuum head; The gas pressure of the extracted gas is obtained by the gas extraction pressure measuring device, and whether the battery cell is normally exhausted is determined based on the gas pressure, wherein the battery cell is determined to be exhausted normally when the maximum value of the gas pressure is not less than a preset gas pressure threshold, and the battery cell is determined to be exhausted abnormally when the maximum value of the gas pressure is less than the preset gas pressure threshold; The driving device is controlled to return the vacuum head or the fixing device to the initial position.

16. A method for manufacturing a battery cell, characterized in that: The manufacturing method comprises: A battery cell is formed by assembling and injecting liquid, and the battery cell is charged at a preset voltage and for a preset time, wherein the battery cell has an openable liquid injection valve, and the liquid injection valve can be opened by a first force, and the first force is directed from the outside of the battery cell to the inside of the battery cell; Exhausting the charged battery cell and detecting the exhaust status by using an exhaust detection device according to any one of claims 1 to 14; The liquid injection valve of the battery cell with normal exhaust is sealed to form the battery cell.

17. A battery, characterized in that: The battery comprises at least one battery cell, and the battery cell is manufactured by the manufacturing method according to claim 15 .

18. An electrical device, characterized in that: The electric device comprises the battery as claimed in claim 16.

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