Battery, power consumption device, battery manufacturing method and equipment

Abstract

This application provides a battery, a power consumption device, and a battery manufacturing method and equipment, and relates to the battery technology field. The battery includes a battery cell and a holder. The battery cell includes a hermetically connected housing and end cover, with a first stopper provided on a side wall of the housing. The holder is provided with a second stopper arranged to engage with the first stopper, thereby restricting the position of the battery cell at least in the axial direction of the battery cell. The first stopper on the side wall of the battery cell and the second stopper on the holder engage with each other to not only restrict the axial position of the battery cell, but also allow the end cover to release pressure when the pressure or temperature inside the battery cell reaches a threshold. This prevents the holder from interfering with the pressure release of the battery cell, allowing the pressure in the battery cell to be released immediately, reducing the risk of explosion due to excessive internal pressure in the battery cell and improving battery safety.

Description

[Technical field]

[0001] The present application relates to the field of battery technology, and in particular to batteries, power consuming devices, and methods and equipment for manufacturing batteries. [Background technology]

[0002] Currently, the batteries commonly used in vehicles are generally lithium ion batteries. As a rechargeable battery, lithium ion batteries have the advantages of small volume, high energy density, high power density, many cycles, and long storage time.

[0003] A battery generally includes a case, a holder and a battery cell, and the holder is used to restrict the position of the battery cell to prevent the battery cell from wobbling in the case. However, if the holder is not designed in a reasonable position, it is likely to affect the safety of the battery cell. Therefore, how to reduce the influence of the holder on the safety of the battery cell is an urgent problem to be solved in the battery field. Summary of the Invention [Problem to be solved by the invention]

[0004] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present embodiments provide a battery, a power consuming device, a method and an apparatus for manufacturing the battery that reduce the impact of the holder on the safety of the battery cells. [Means for solving the problem]

[0005] According to a first aspect, an embodiment of the present application provides a battery including a battery cell and a holder. The battery cell includes a housing and an end cover hermetically connected to each other, and a first stopper portion is provided on a side wall of the housing. The holder is provided with a second stopper portion, the second stopper portion being arranged to engage with the first stopper portion, thereby limiting the position of the battery cell at least in an axial direction of the battery cell.

[0006] In the above technical solution, the first stopper portion on the side wall of the battery cell and the second stopper portion on the holder are engaged and joined, not only realizing the axial position restriction for the battery cell, but also the second stopper portion allows the end cover to escape and provides space in the axial direction of the battery cell, so that the end cover can be activated to release the pressure inside the battery cell when the pressure or temperature inside the battery cell reaches a threshold value, and the end cover can be activated to release the pressure without having to overcome the restriction of the second stopper portion on the holder that restricts the axial position of the battery cell, thereby avoiding the holder from affecting the pressure release of the battery cell, and instantly releasing the pressure of the battery cell, reducing the risk of the battery cell exploding due to excessive internal pressure, thereby improving the safety of the battery.

[0007] In some embodiments of the first aspect of the present application, one of the first stopper portion and the second stopper portion is a locking groove, and the other is a first protrusion.

[0008] In the above technical solution, the first stopper portion and the second stopper portion form a concave-convex fit to realize axial position restriction for the battery cell, and the first stopper portion and the second stopper portion have a simple structure and a simple fitting method.

[0009] In some embodiments of the first aspect of the present application, the locking groove is an annular groove disposed on the outer surface of the side wall.

[0010] In the above technical solution, the locking groove is an annular groove installed on the outer surface of the side wall, which reduces the difficulty of positioning the locking groove and the first protrusion when attaching the battery cell to the holder, thereby reducing the difficulty of attaching the battery cell to the holder.

[0011] In some embodiments of the first aspect of the present application, a protrusion that protrudes into the inside of the battery cell is formed at a position corresponding to the annular groove on the inner surface of the side wall, and is positioned to restrict movement of the end cover in a direction approaching the inside of the battery cell.

[0012] In the above technical solution, a convex portion protruding into the inside of the battery cell is formed at a position corresponding to the annular groove on the inner surface of the side wall, and the convex portion can restrict the end cover from moving in a direction approaching the inside of the battery cell. By forming an annular groove in this manner on the side wall of the battery cell, not only is the structural strength of the side wall of the battery cell not reduced, but the axial position relative to the battery cell can be restricted by the engagement between the annular groove and the first protrusion. In addition, a convex portion that restricts the position of the end cover is formed correspondingly while forming the annular groove, which simplifies the manufacturing process of the battery cell and reduces the difficulty of manufacturing the battery cell.

[0013] In some embodiments of the first aspect of the present application, the second stopper portion is disposed at an end portion of the holder along the axial direction.

[0014] In the above technical solution, the second stopper portion is installed at the axial end of the holder along the battery cell, thereby enabling rational use of the holder, and the position of the second stopper portion is as close as possible to the axial end of the battery cell, thereby more effectively restricting the axial position of the battery cell.

[0015] In some embodiments of the first aspect of the present application, the holder further includes a main body portion connected to the second stopper portion, the main body portion being installed corresponding to the side wall, the second stopper portion and the main body portion surrounding an accommodating portion, and the accommodating portion being arranged to accommodate at least a portion of the side wall.

[0016] In the above technical solution, the second stopper portion and the main body portion surround the accommodating portion, and the accommodating portion can accommodate at least a portion of the side wall of the battery cell, so that the accommodating portion limits the position of the battery cell from the lateral direction of the battery cell, thereby reducing the wobbling of the battery cell relative to the holder and improving the mounting stability of the battery cell.

[0017] In some embodiments of the first aspect of the present application, two second stopper portions are provided at one end along the axial direction of the main body portion, and the two second stopper portions extend along opposite directions to form two of the accommodating portions with the main body portion, the two accommodating portions are provided on opposite sides of the holder away from each other, and one of the battery cells is provided correspondingly in each of the accommodating portions.

[0018] In the above technical solution, the two second stopper parts extend along opposite directions to form a main body part and two accommodating parts, each accommodating part correspondingly accommodating one battery cell, which can fully utilize the holder, and further reduce the number of battery holders and the weight of the battery.

[0019] In some embodiments of the first aspect of the present application, the receiving portion has a mating surface, the mating surface being positioned to conform to a contour of an outer surface of the side wall.

[0020] In the above technical solution, since the accommodating portion has a mating surface that closely matches the contour of the outer surface of the side wall, the accommodating portion can better restrict the position of the battery cell, reducing the possibility of the battery cell wobbling relative to the holder.

[0021] In some embodiments of the first aspect of the present application, the mating surface is an arcuate surface, and the mating surface is arranged to limit a position of the battery cell along a radial direction of the battery cell.

[0022] In the above technical solution, the mating surface limits the position of the battery cell along the radial direction of the battery cell, thereby allowing the battery cell to be stably attached to the holder and reducing the possibility of the battery cell wobbling relative to the holder.

[0023] In some embodiments of the first aspect of the present application, the battery includes two of the holders, and the two holders are engaged with an outer periphery of one of the battery cells.

[0024] In the above technical solution, the two holders are engaged with the outer periphery of one battery cell, so that the two holders can sufficiently restrict the position of the battery cell in the radial and axial directions, so that the battery is more stably attached to the holder and the possibility of the battery cell wobbling relative to the holder is reduced.

[0025] In some embodiments of the first aspect of the present application, the two holders are fixedly connected.

[0026] In the above technical solution, the two holders are fixedly connected, thereby keeping the two holders engaged with the outer periphery of one battery cell, so that the battery is more stably attached to the holder and the possibility of the battery cell wobbling relative to the holder is reduced.

[0027] In some embodiments of the first aspect of the present application, the battery includes a plurality of the holders arranged in parallel, and the plurality of the holders are integrally molded.

[0028] In the above technical solution, the battery includes a plurality of holders arranged in parallel, and a plurality of battery cells can be mounted thereon, thereby increasing the electric energy of the battery. The plurality of holders are integrally molded, which is easy to manufacture, and when assembled to form a battery, there is no need to connect the plurality of holders arranged in parallel, which simplifies the manufacturing process of the battery and reduces the difficulty of manufacturing the battery.

[0029] In some embodiments of the first aspect of the present application, a side of the holder away from the corresponding battery cell is flat.

[0030] In the above technical solution, the side of the holder away from the corresponding battery cell is flat, which makes it easier to install the holder and also allows the holder to better engage with other structures.

[0031] In some embodiments of the first aspect of the present application, two of the first stopper portions are provided on the side wall, and the two first stopper portions are spaced apart from each other along the axial direction on the side wall of the housing, and each of the second stopper portions is arranged to engage and join with one of the first stopper portions.

[0032] In the above technical solution, two first stopper portions are provided on the side wall, and each second stopper portion is arranged to engage and join with one first stopper portion, thereby providing stronger axial positional restriction for the battery cell.

[0033] In certain embodiments of the first aspect of the present application, the housing is cylindrical.

[0034] In the above technical solution, the housing of the battery cell is cylindrical, that is, the housing has a regular structure, which makes it easy to attach the battery cell to the holder.

[0035] In some embodiments of the first aspect of the present application, the battery further includes a housing, the battery cell is accommodated in the housing, and the holder is fixed within the housing.

[0036] In the above technical solution, the holder is fixed to the housing, preventing the holder from wobbling within the housing, thereby reducing the possibility that the battery cells will wobble within the housing.

[0037] In some embodiments of the first aspect of the present application, the holder is further provided with a flow channel configured to receive a fluid for regulating a temperature of the battery cell.

[0038] In the above technical solution, the flow path contains a fluid capable of adjusting the temperature of the battery cell, and when the environmental temperature is low, the temperature of the battery cell is adjusted to be high to ensure normal operation of the battery cell, and when the environmental temperature or the temperature of the battery cell is too high, the fluid contained in the flow path reduces the temperature of the battery cell, so that the battery cell operates normally and the safety of the battery can be ensured. The flow path contains the fluid for adjusting the temperature of the battery cell, which not only adjusts the temperature of the battery cell but also reduces the weight of the holder and the battery.

[0039] In some embodiments of the first aspect of the present application, the flow passage passes through both ends of the holder along the axial direction of the battery cell.

[0040] In the above technical solution, the flow passage penetrates both ends of the holder, so that the fluid flowing through the flow passage can easily exchange heat with the battery cells, thereby improving the efficiency of temperature regulation of the battery cells.

[0041] According to a second aspect, an embodiment of the present application provides a power consuming device including a battery as provided by an embodiment of the first aspect.

[0042] In the above technical solution, the first stopper portion on the side wall of the battery cell and the second stopper portion on the holder are engaged and joined, not only realizing the axial position restriction for the battery cell, but also the second stopper portion allows the end cover to escape and provides space in the axial direction of the battery cell, so that the end cover can be activated to release the pressure inside the battery cell when the pressure or temperature inside the battery cell reaches a threshold value, and the end cover can be activated to release the pressure without having to overcome the restriction of the second stopper portion on the holder that restricts the axial position of the battery cell, thereby avoiding the holder from affecting the pressure release of the battery cell, and instantly releasing the pressure of the battery cell, reducing the risk of the internal pressure of the battery cell being too large and causing an explosion, etc., improving the safety of the battery cell, and thereby improving the safety of power consumption.

[0043] According to a third aspect, the present embodiment comprises: Providing a battery cell, The battery cell includes a housing and an end cover that are hermetically connected, and a first stopper portion is provided on a side wall of the housing; providing a holder in which the second stop portion is provided; and attaching the battery cell to the holder so as to engage and join the second stopper portion and the first stopper portion to realize an axial positional restriction of the battery cell relative to the battery cell.

[0044] In the above technical solution, by engaging and joining the first stopper portion of the battery cell and the second stopper portion of the holder, not only is the axial position restriction for the battery cell realized, but the second stopper portion also allows the end cover to escape and provides space in the axial direction of the battery cell, so that the end cover can be activated to release the pressure inside the battery cell when the pressure or temperature inside the battery cell reaches a threshold value, and the end cover can be activated to release the pressure without having to overcome the restriction of the second stopper portion of the holder that restricts the axial position of the battery cell, thereby avoiding the holder from affecting the pressure release of the battery cell, and instantly releasing the pressure of the battery cell, reducing the risk of the battery cell exploding due to excessive internal pressure, and improving the safety of the battery cell.

[0045] According to a fourth aspect, an embodiment of the present application provides a battery manufacturing facility including a providing device and an assembling device. The providing device is configured to provide a battery cell and a holder. The battery cell includes a housing and an end cover that are hermetically connected, and a first stopper portion is provided on a side wall of the housing. A second stopper portion is provided on the holder, and the assembling device is arranged to attach the battery cell to the holder, engaging and joining the second stopper portion with the first stopper portion, thereby restricting a position of the battery cell at least in an axial direction of the battery cell. [Brief description of the drawings]

[0046] In order to more clearly explain the technical solutions of the embodiments of the present application, the following provides a brief description of the drawings required in the embodiments, and it should be understood that the following drawings only illustrate some embodiments of the present application, and should not be regarded as limiting the scope of the claims, and those skilled in the art can obtain other related drawings based on these drawings without any creative efforts.

[0047] [Figure 1] 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application. [Diagram 2] FIG. 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Diagram 3] FIG. 2 is an exploded view of a battery cell according to some embodiments of the present application. [Figure 4] FIG. 2 is a schematic diagram of a battery cell mounted in a holder according to some embodiments of the present application. [Diagram 5] FIG. 5 is an enlarged view of part I in FIG. [Figure 6] FIG. 1 is a cross-sectional view of a battery cell according to some embodiments of the present application. [Figure 7] FIG. 7 is an enlarged view of part II in FIG. [Figure 8] 1 is a structural schematic diagram of a holder according to some embodiments of the present application. [Figure 9] FIG. 9 is an enlarged view of part III in FIG. [Figure 10] FIG. 13 is a structural schematic diagram of a first viewing angle of a holder according to another embodiment of the present application. [Figure 11] FIG. 13 is a structural schematic diagram of a second viewing angle of a holder according to another embodiment of the present application. [Figure 12] FIG. 2 is a structural projection view after assembling a battery cell and two holders according to some embodiments of the present application. [Figure 13] FIG. 2 is a structural projection view of a battery cell and two holders according to some embodiments of the present application before assembly. [Figure 14] 1 is a structural schematic diagram of multiple holders arranged in parallel according to some embodiments of the present application. FIG. [Figure 15]FIG. 2 is a schematic diagram of an arrangement of two rows of holders according to some embodiments of the present application. [Figure 16] FIG. 2 is a structural schematic diagram of a battery including two rows of holders according to some embodiments of the present application. [Figure 17] FIG. 2 is a schematic diagram of an arrangement of three rows of holders according to some embodiments of the present application. [Figure 18] FIG. 2 is a structural schematic diagram of a battery including three rows of holders according to some embodiments of the present application. [Figure 19] FIG. 2 is a structural schematic diagram of a battery according to another embodiment of the present application. [Figure 20] FIG. 2 is a structural schematic diagram of a battery according to yet another embodiment of the present application. [Figure 21] 1 is a flow chart of a method for manufacturing a battery according to some embodiments of the present application. [Figure 22] 1 is a structural schematic diagram of a battery manufacturing facility according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0048] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application are described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application described and shown in the drawings in this specification can generally be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0050] In addition, the embodiments and features of the embodiments in the present application can be combined with each other as long as they are not contradictory.

[0051] It should be noted that like numerals and letters indicate like items in the following drawings, and thus, if an item is defined in one drawing, it need not be further defined and interpreted in subsequent drawings.

[0052] In the description of the embodiments of the present application, the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, or are orientations or positional relationships that are normally arranged when using the product of the present application, or are orientations or positional relationships that are normally understood by those skilled in the art, and are merely for facilitating and simplifying the description of the present application, and do not indicate or imply that the target devices or elements have a specific orientation, or should be configured and operated in a specific orientation, and therefore should not be understood as limiting the present application. Furthermore, terms such as "first", "second", and "third" are merely for the purpose of distinguishing and describing, and should not be understood as indicating or implying relative importance.

[0053] Lithium ion batteries have significant advantages such as high energy density and excellent cycle characteristics, and have become the mainstream product of secondary batteries, and are widely used in fields such as portable electronic devices, automobiles, mobile phones, and spacecraft.

[0054] A battery generally includes a battery cell and a holder for restricting the position of the battery cell, the battery cell includes a housing, an end cover and an electrode assembly, the end cover is hermetically connected to one axial end of the battery cell, and the housing and the end cover together define a receiving cavity for receiving the electrode assembly. There is a risk that the internal pressure or temperature of the battery cell will increase suddenly during charging and discharging, and if the internal pressure or temperature of the battery cell is not released when it increases to a certain value, safety accidents such as fire or explosion are likely to occur. Therefore, in order to ensure the safety of the battery, a pressure reducing mechanism is generally installed in the end cover, and when the pressure or temperature inside the battery reaches a threshold value, the pressure reducing mechanism is activated and the pressure inside the battery can be released through the pressure reducing mechanism.

[0055] The inventor noticed that, since the battery has requirements for the structural strength of the battery cell housing, the pressure reducing mechanism is generally installed in the end cover, and in some battery cell structures, the end cover itself can be the pressure reducing mechanism without installing a dedicated pressure reducing mechanism in the battery cell, and when the pressure or temperature inside the battery reaches a threshold, the end cover is activated to break the connection relationship between the end cover and the housing, thereby releasing the pressure inside the battery. Regardless of whether the battery cell is provided with a dedicated pressure reducing mechanism or the pressure is reduced by the end cover itself, the position of pressure reduction is always at least one end of the axial direction of the battery cell.

[0056] The positional restriction of the holder relative to the battery cell includes a positional restriction in the axial direction, and a stopper portion of the holder abuts against at least one axial end of the battery cell, thereby realizing the axial positional restriction relative to the battery cell. The stopper portion of the holder blocks the operation of the pressure reducing mechanism or the end cover, and in order for the pressure reducing mechanism or the end cover to release the pressure inside the battery cell, it must first overcome the shielding caused by the stopper portion of the holder. If the pressure in the battery cell is not reduced immediately or is not reduced at all, safety accidents such as fires and explosions may occur.

[0057] Based on this, in order to improve the effect of the holder on the pressure release of the battery cell, the inventor has made extensive research and has come up with the following results: With respect to the battery, by engaging and joining the first stopper part on the side wall of the battery cell with the second stopper part on the holder, not only is the axial position restriction for the battery cell realized, but the second stopper part also releases the end cover to provide space on the axial direction of the battery cell, so that the end cover can be activated to release the pressure inside the battery cell when the pressure or temperature inside the battery cell reaches a threshold value, and the end cover can be activated to release the pressure without having to overcome the restriction of the second stopper part on the holder that restricts the axial position of the battery cell, thus avoiding the holder from affecting the pressure release of the battery cell, instantly releasing the pressure of the battery cell, reducing the risk of the battery cell exploding due to excessive internal pressure, and improving the safety of the battery.

[0058] The battery cell described in the embodiments of the present application is applied to a power consuming device that uses a battery.

[0059] The power consuming device may be a vehicle, a mobile phone, a mobile device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range extender vehicle, etc. The spacecraft may include an aircraft, a rocket, a space shuttle, a space ship, etc. The electric toy may include a game console, an electric car toy, an electric ship toy, an electric aircraft toy, or other stationary or mobile electric toy. The electric tool may include a metal cutting electric tool, a polishing electric tool, an assembly electric tool, or a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an electric impact driver, a concrete vibrator, and an electric planer. The embodiment of the present application is not particularly limited to the above power consuming device.

[0060] For convenience of explanation, the following embodiment will be described taking a vehicle as an example of a power consuming device.

[0061] 1, which is a structural schematic diagram of a vehicle 1000 according to some embodiments of the present application. A battery 100 is installed inside the vehicle 1000, and the battery 100 may be installed at the bottom, front or rear of the vehicle 1000. The battery 100 can be used to supply power to the vehicle 1000, for example, as an operating power source for the vehicle 1000.

[0062] The vehicle 1000 may further include a controller 200 and a motor 300, where the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the operating power needs of the vehicle 1000 for starting, navigation, and driving.

[0063] In some embodiments of the present application, the battery 100 can provide not only the operating power source for the vehicle 1000, but also the propulsion power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide propulsion power to the vehicle 1000.

[0064] 2 and 3, Fig. 2 is a structural schematic diagram of a battery 100 according to some embodiments of the present application, and Fig. 3 is an exploded view of a battery cell 10 according to some embodiments of the present application. The battery 100 includes a battery cell 10 and a holder 20. The battery cell 10 includes a housing 11 and an end cover 12 that are hermetically connected, and a first stopper portion 13 is provided on a side wall 111 of the housing 11. A second stopper portion 21 is provided on the holder 20, and the second stopper portion 21 is arranged to engage and join with the first stopper portion 13, thereby restricting the position of the battery cell 10 at least in the axial direction of the battery cell 10.

[0065] The battery cell 10 may include a housing 11, an end cover 12, and an electrode assembly 14. The housing 11 has an opening 112, the electrode assembly 14 is accommodated within the housing 11, and the end cover 12 is used to cover the opening 112.

[0066] The side wall 111 of the housing 11 of the battery cell 10 refers to a wall that surrounds the outer periphery of the axis of the battery cell 10. The first stopper portion 13 is provided on the outer surface of the side wall 111.

[0067] The housing 11 may have various shapes, such as a cylinder, a rectangular parallelepiped, etc. The shape of the housing 11 is determined by the specific shape of the electrode assembly 14. For example, if the electrode assembly 14 has a cylindrical structure, the housing 11 may select a cylindrical structure, and if the electrode assembly 14 has a rectangular parallelepiped structure, the housing 11 may select a rectangular parallelepiped structure. Figures 2 and 3 exemplarily show a case where the housing 11 and the electrode assembly 14 are cylindrical.

[0068] The housing 11 may be made of any of a number of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and the embodiments of the present application are not particularly limited thereto.

[0069] The electrode assembly 14 may include a positive electrode sheet (not shown), a negative electrode sheet (not shown), and a separator (not shown). The electrode assembly 14 may have a wound structure formed by winding a positive electrode sheet, a separator, and a negative electrode sheet, or may have a stacked structure formed by stacking a positive electrode sheet, a separator, and a negative electrode sheet. The electrode assembly 14 further includes a positive electrode tab (not shown) and a negative electrode tab (not shown), and a positive electrode current collector in the positive electrode sheet on which a positive electrode active material layer is not applied may be the positive electrode tab, and a negative electrode current collector in the negative electrode sheet on which a negative electrode active material layer is not applied may be the negative electrode tab.

[0070] The end cover 12 is used to cover the opening 112 of the housing 11 to form a sealed receiving cavity (not shown), which is used to receive the electrode assembly 14. The receiving space is further used to receive an electrolyte, for example, an electrolyte solution. The end cover 12 serves as a member for outputting the electric energy of the electrode assembly 14, and the electrode terminals on the end cover 12 are used to electrically connect with the electrode assembly 14, i.e., the electrode terminals are electrically connected to the tabs of the electrode assembly 14, for example, the electrode terminals and the tabs are connected via a current collector (not shown) to realize the electrical connection between the electrode terminals and the tabs.

[0071] The number of openings 112 in the housing 11 may be one or two. As shown in FIG. 3, if the housing 11 has one opening 112, the end cover 12 may also have one, and two electrode terminals can be installed on the end cover 12, and the two electrode terminals are used to electrically connect with the positive and negative tabs of the electrode assembly 14, respectively, and the two electrode terminals in the end cover 12 are the positive and negative electrode terminals, respectively, or the positive tab of the electrode assembly 14 is electrically connected with the electrode terminal of the end cover 12, and the negative tab of the electrode assembly 14 is electrically connected with the housing 11, and the end cover 12 is insulated and connected with the housing 11. In order to realize the insulated connection between the end cover 12 and the housing 11, in some embodiments, the battery cell 10 further includes an insulating member 15, which is disposed between the end cover 12 and the housing 11, and separates the end cover 12 from the housing 11, thereby realizing the insulated connection between the end cover 12 and the housing 11. If the housing 11 has two openings 112, for example, the two openings 112 are provided on opposite sides of the housing 11, and there may be two end covers 12, each covering the two openings 112 of the housing 11. In this case, the electrode terminal of one end cover 12 may be a positive electrode terminal used to electrically connect with the positive electrode tab of the electrode assembly 14, and the electrode terminal of the other end cover 12 may be a negative electrode terminal used to electrically connect with the negative electrode sheet of the electrode assembly 14.

[0072] The second stopper portion 21 is installed on the holder 20, and the engagement and connection between the first stopper portion 13 and the second stopper portion 21 may be achieved by the first stopper portion 13 and the second stopper portion 21 abutting along the axial direction of the battery cell 10, or by the first stopper portion 13 and the second stopper portion 21 engaging with each other along the axial direction of the battery cell 10.

[0073] The engagement and joining of the first stopper portion 13 on the side wall 111 of the battery cell 10 and the second stopper portion 21 on the holder 20 not only realizes the axial position restriction for the battery cell 10, but also allows the end cover 12 to escape and provide space in the axial direction of the battery cell 10, so that the end cover 12 can be activated to release the pressure inside the battery cell 10 when the pressure or temperature inside the battery cell 10 reaches a threshold value. The end cover 12 can be activated to release the pressure without having to overcome the restriction of the second stopper portion 21 on the holder 20 that restricts the axial position of the battery cell 10, thereby avoiding the holder 20 from affecting the pressure release of the battery cell 10, and instantly releasing the pressure of the battery cell 10, thereby reducing the risk of the battery cell 10 exploding due to excessive internal pressure, and improving the safety of the battery 100.

[0074] In some embodiments, one of the first stopper portion 13 and the second stopper portion 21 is a locking groove, and the other is a first protrusion.

[0075] The direction of the locking groove cutout should be arranged to form an acute or obtuse angle with the axial direction of the battery cell 10. In some embodiments, the locking groove cutout coincides with the lateral direction of the battery cell 10, which refers to the direction perpendicular to the axial direction of the battery cell 10, and in embodiments in which the housing 11 of the battery cell 10 is cylindrical, the lateral direction of the battery cell 10 may be the radial direction of the battery cell 10.

[0076] The width of the locking groove along the axial direction of the battery cell 10 is the same as the size of the first protrusion along the axial direction of the battery cell 10, preventing the battery cell 10 from wobbling in the axial direction relative to the holder 20.

[0077] The first stopper portion 13 and the second stopper portion 21 form a recessed and protruding fit to restrict the axial position of the battery cell 10. The first stopper portion 13 and the second stopper portion 21 have a simple structure and a simple fitting method.

[0078] In some embodiments, the locking groove is an annular groove located on the outer surface of the side wall 111 .

[0079] The annular groove is a closed structure in which the locking groove extends along the circumferential direction of the side wall 111 of the housing 11 and is provided in a ring shape in the circumferential direction of the side wall 111 of the housing 11. In an embodiment in which the housing 11 of the battery cell 10 is cylindrical, the annular groove is a circular structure with a constant radius, and in an embodiment in which the housing 11 of the battery cell 10 is rectangular, the annular groove is a rectangular structure that matches the contour of the side wall 111 of the housing 11 in the circumferential direction.

[0080] The locking groove is an annular groove provided on the outer surface of the side wall 111, and the locking groove can form an engagement with the second stopper portion 21 at any position along the circumferential direction of the battery cell 10, which reduces the difficulty of positioning the locking groove and the first protrusion when attaching the battery cell 10 to the holder 20, thereby reducing the difficulty of attaching the battery cell 10 to the holder 20. In another embodiment, the locking groove can be provided on the holder 20, and the first protrusion is provided on the outer surface of the side wall 111 of the housing 11.

[0081] 4 and 5, Fig. 4 is a schematic diagram of a battery cell 10 according to some embodiments of the present application attached to a holder 20, and Fig. 5 is an enlarged view of part I in Fig. 4. The second stopper portion 21 is provided within the first stopper portion 13, and two groove walls of the first stopper portion 13 along the axial direction of the battery cell 10 are used to abut against both sides of the second stopper portion 21, thereby restricting the axial position of the battery cell 10.

[0082] 6 and 7, Fig. 6 is a cross-sectional view of a battery cell 10 according to some embodiments of the present application, and Fig. 7 is an enlarged view of part II in Fig. 6. In some embodiments, a protrusion 113 that protrudes into the inside of the battery cell 10 is formed at a position corresponding to the annular groove on the inner surface of the side wall 111. The protrusion 113 is arranged to restrict movement of the end cover 12 in a direction approaching the inside of the battery cell 10.

[0083] The end cover 12 is installed at one end in the axial direction of the housing 11. In order to restrict the end cover 12 from moving toward the inside approaching the battery cells 10, a protrusion 113 is provided on the inner surface of the housing 11, the protrusion 113 is located on the side of the end cover 12 facing the inside of the battery cells 10, the protrusion 113 abuts against the end cover 12 on the side of the end cover 12 facing the inside of the battery cells 10, and the protrusion 113 and the end cover 12 can be insulated and connected. The protrusion 113 is formed at a position corresponding to the annular groove on the inner surface of the side wall 111, the protrusion 113 has an annular structure that fits into the annular groove, and the annular protrusion 113 can increase the area of ​​the abutment surface 24 against the end cover 12, more effectively restricting the end cover 12 from moving along the inside approaching the battery cells 10.

[0084] In addition, a protrusion 113 that protrudes into the inside of the battery cell 10 is formed at a position corresponding to the annular groove on the inner surface of the side wall 111, and this protrusion 113 can restrict the end cover 12 from moving in a direction approaching the inside of the battery cell 10. By forming an annular groove in the side wall 111 of the battery cell 10 in this manner, not only is the structural strength of the side wall 111 of the battery cell 10 not reduced, but the position of the battery cell 10 in the axial direction can be restricted by the engagement between the annular groove and the first protrusion, and at the same time, a protrusion 113 that restricts the position of the end cover 12 is formed correspondingly, thereby simplifying the manufacturing process of the battery cell 10 and reducing the difficulty of manufacturing the battery cell 10.

[0085] 8 and 9, Fig. 8 is a structural schematic diagram of holder 20 according to some embodiments of the present application, and Fig. 9 is an enlarged view of part III in Fig. 8. A notch 211 is provided in the end face of second stopper portion 21 that is inserted into first stopper portion 13, and notch 211 penetrates both sides of second stopper portion 21 along the axial direction of the battery cell 10. Notch 211 has an abutment surface that fits against the bottom wall of the annular groove that faces notch 211.

[0086] Continuing to refer to FIGS. 8 and 9, in some embodiments, the second stopper portion 21 is disposed at an axial end of the holder 20. As shown in FIG.

[0087] The second stopper portion 21 is disposed at an end portion along the axial direction of the holder 20, and the first stopper portion 13 is disposed at a side wall 111 of the housing 11, so that one end of the battery cell 10 provided with the end cover 12 can extend from the holder 20 along the axial direction of the battery cell 10, facilitating the output of electrical energy from the battery cell 10. The second stopper portion 21 is disposed at an end portion along the axial direction of the battery cell 10, so that the holder 20 can be utilized efficiently, and the position of the second stopper portion 21 is as close as possible to the end portion in the axial direction of the battery cell 10, so as to provide a more effective positional restriction in the axial direction of the battery cell 10. In other embodiments, the second stopper portion 21 may be disposed at another position of the holder 20, for example, at the center of the holder 20. In an embodiment in which a protrusion 113 is formed on the inner surface of the housing 11, the second stopper portion 21 is installed at one end of the holder 20 along the axial direction of the battery cell 10, and the protrusion 113 can provide relief for the electrode assembly 14 (shown in Figures 3 and 6) area, thereby improving the energy density of the battery cell 10.

[0088] 8 and 9, in some embodiments, the holder 20 further includes a main body portion 22 connected to the second stopper portion 21, the main body portion 22 is installed corresponding to the side wall 111, the second stopper portion 21 and the main body portion 22 surround the accommodating portion 23, and the accommodating portion 23 is arranged to accommodate at least a portion of the side wall 111.

[0089] The accommodating portion 23 communicates with the notch 211 along the axial direction of the battery cell 10. The accommodating portion 23 has an inlet, which is used to allow the side wall 111 of the housing 11 to enter the accommodating portion 23. "The accommodating portion 23 is disposed to accommodate at least a portion of the side wall 111" means that a portion of the side wall 111 may be restricted and accommodated within the accommodating portion 23, or the entire side wall 111 may be restricted and accommodated within the accommodating portion 23.

[0090] The main body portion 22 may be disposed in correspondence with the side wall 111 , and the main body portion 22 may be disposed opposite the side wall 111 and the extending direction of the main body portion 22 may coincide with the axial direction of the side wall 111 .

[0091] The second stopper portion 21 and the main body portion 22 surround the accommodating portion 23, and the accommodating portion 23 can accommodate at least a portion of the side wall 111 of the battery cell 10, thereby allowing the accommodating portion 23 to restrict the position of the battery cell 10 from the lateral direction of the battery cell 10, thereby reducing wobbling of the battery cell 10 relative to the holder 20 and improving the mounting stability of the battery cell 10.

[0092] 10 and 11, Fig. 10 is a structural schematic diagram of a first viewing angle of the holder 20 according to another embodiment of the present application, and Fig. 11 is a structural schematic diagram of a second viewing angle of the holder 20 according to another embodiment of the present application. In some embodiments, two second stopper parts 21 are provided at one end along the axial direction of the main body part 22, and the two second stopper parts 21 extend along opposite directions to form two receiving parts 23 with the main body part 22, and the two receiving parts 23 are provided on both sides of the holder 20 spaced apart from each other, and one battery cell 10 is provided correspondingly in each receiving part 23.

[0093] The two second stopper portions 21 extend in opposite directions to form a main body portion 22 and two storage portions 23, and each storage portion 23 correspondingly accommodates one battery cell 10, thereby making full use of the holder 20 and further reducing the number of holders 20 for the battery 100, thereby reducing the weight of the battery 100.

[0094] In some embodiments, the receiving portion 23 has a mating surface 231 that is positioned to closely match the contour of the outer surface of the sidewall 111 .

[0095] The mating surface 231 being disposed to closely conform to the contour of the outer surface of the sidewall 111 refers to the portion of the outer surface of the sidewall 111 facing the accommodating portion 23 being closely conformed to the mating surface 231 after the battery cell 10 is attached to the holder 20, and in an embodiment in which the battery cell 10 is cylindrical, the outer surface of the sidewall 111 is a cylindrical surface, and the mating surface 231 is an arcuate surface with a radius equal to the radius of the sidewall 111. In an embodiment in which the battery cell 10 is rectangular, the outer surface of the sidewall 111 is a rectangular surface, and the mating surface 231 is shaped to fit the portion of the outer surface of the sidewall 111 facing the accommodating portion 23.

[0096] In an embodiment in which the second stopper portion 21 is the first protrusion, the first protrusion protrudes relative to the mating surface 231, i.e., the second stopper portion 21 protrudes from the mating surface 231. The size by which the first protrusion protrudes from the mating surface 231 is the same as the depth of the locking groove along the radial direction of the battery cell 10, so that when the first protrusion enters the locking groove, the outer surface of the side wall 111 of the housing 11 fits snugly against the mating surface 231, and one end of the first protrusion remote from the mating surface 231 abuts against the bottom wall of the locking groove.

[0097] Because the accommodating portion 23 has a mating surface 231 that fits the contour of the outer surface of the side wall 111, the accommodating portion 23 can more effectively restrict the position of the battery cell 10, reducing the possibility of the battery cell 10 wobbling relative to the holder 20.

[0098] In some embodiments, the mating surface 231 is an arcuate surface, and the mating surface 231 is disposed so as to limit the position of the battery cell 10 along the radial direction of the battery cell 10 .

[0099] The mating surface 231 is arranged so as to restrict the position of the battery cell 10 along the radial direction of the battery cell 10 , and the mating surface 231 extends along the circumferential direction of the side wall 111 and covers a portion of the outer surface of the side wall 111 .

[0100] By the mating surface 231 restricting the position of the battery cell 10 along the radial direction of the battery cell 10, the battery cell 10 can be stably attached to the holder 20, and the possibility of the battery cell 10 wobbling relative to the holder 20 is reduced.

[0101] 12 and 13, Fig. 12 is a structural projection view after assembling the battery cell 10 and two holders 20 according to some embodiments of the present application, and Fig. 13 is a structural projection view before assembling the battery cell 10 and two holders 20 according to some embodiments of the present application. In some embodiments, the battery 100 includes two holders 20, and the two holders 20 are engaged with the outer periphery of one battery cell 10.

[0102] The engagement of the two holders 20 with the outer periphery of one battery cell 10 may mean that a portion of the outer surface of the side wall 111 of the battery cell 10 is covered after the two holders 20 are engaged, or that a sealed area formed along the circumferential direction of the battery cell 10 by the engagement of the two holders 20 covers the outer surface of the side wall 111 of the battery cell 10.

[0103] As shown in FIG. 13 , each holder 20 has an abutment surface 24, and an accommodating portion 23 is formed on the abutment surface 24, and the abutment surface 24 of one of the two holders 20 is arranged to abut against the abutment surface 24 of the other holder 20, whereby the accommodating portion 23 of one of the two holders 20 and the accommodating portion 23 of the other holder 20 together define an accommodating space which is open at both ends, and the accommodating space is configured to accommodate at least a portion of the side wall 111 of the housing 11.

[0104] By engaging the two holders 20 with the outer periphery of one battery cell 10, the two holders 20 can adequately restrict the position of the battery cell 10 in the radial and axial directions, so that the battery 100 is stably attached to the holder 20 and the possibility of the battery cell 10 wobbling relative to the holder 20 is reduced.

[0105] In some embodiments, the two holders 20 are fixedly connected.

[0106] The two holders 20 can be fixedly connected by adhesive, bolt connection, etc. For example, adhesive is provided between the abutment surfaces 24 of the two holders 20, and the fixed connection of the two holders 20 is realized by adhesive, or bolts are passed through the two holders 20 in sequence to realize the fixed connection of the two holders 20. In other embodiments, the two holders 20 do not need to be connected to each other, and in this case, it is sufficient to fit the abutment surfaces 24 of the two holders 20 together.

[0107] The two holders 20 are fixedly connected, thereby holding the two holders 20 engaged with the outer periphery of one battery cell 10, so that the battery 100 is more stably attached to the holder 20, reducing the possibility of the battery cell 10 wobbling relative to the holder 20.

[0108] 14, which is a structural schematic diagram of multiple holders 20 arranged in parallel according to some embodiments of the present application. In some embodiments, the battery 100 includes multiple holders 20 arranged in parallel, and the multiple holders 20 are integrally molded.

[0109] The multiple holders 20 are arranged in parallel along the first direction A, and when the multiple holders 20 are arranged in parallel and a battery cell 10 is attached to each holder 20, the axial directions of the battery cells 10 corresponding to each holder 20 coincide.

[0110] The term "the holders 20 are integrally formed" refers to a one-piece structure in which the holders 20 are formed by an integral molding method, such as injection molding, press molding, etc. In other embodiments, the holders 20 can be connected by bolts, screws, adhesives, etc.

[0111] The battery 100 includes a plurality of holders 20 arranged in parallel, and a plurality of battery cells 10 can be mounted thereon, thereby increasing the electrical energy of the battery 100. According to actual needs, the battery 100 may include only one holder 20. The plurality of holders 20 are integrally molded, which is easy to manufacture, and when assembled to form the battery 100, there is no need to connect the plurality of holders 20 arranged in parallel, which simplifies the manufacturing process of the battery 100 and reduces the difficulty of manufacturing the battery 100.

[0112] In one embodiment, the battery 100 includes multiple rows of holders 20, and the multiple rows of holders 20 are arranged along a second direction B, and the arrangement direction of the multiple rows of holders 20 is perpendicular to the parallel direction of the multiple holders 20, i.e., the first direction A is perpendicular to the second direction B, and each row of holders 20 includes multiple holders 20 arranged in parallel along the first direction A. Two adjacent rows of holders 20 engage with the outer periphery of one row of battery cells 10 and limit the radial position of the battery cells 10.

[0113] 15 and 16, FIG. 15 is a schematic diagram of the arrangement of two rows of holders 20 according to some embodiments of the present application, and FIG. 16 is a structural schematic diagram of a battery 100 including two rows of holders 20 according to some embodiments of the present application. The battery 100 includes two rows of holders 20 arranged along the second direction B. For ease of explanation, the two rows of holders 20 are defined as a first row 20a and a second row 20b, respectively. Each row of holders 20 includes a plurality of holders 20 arranged in parallel along the first direction A. The number of holders 20 in the first row 20a is the same as the number of holders 20 in the second row 20b. The holders 20 in the first row 20a are arranged in one-to-one correspondence with the holders 20 in the second row 20b. Each holder 20 is provided with one accommodating section 23. The entrance of the accommodating section 23 in each holder 20 in the first row 20a and the entrance of the accommodating section 23 in the corresponding holder 20 in the second row 20b are arranged opposite each other along the first direction A. Each holder 20 in the first row 20a and the corresponding holder 20 in the second row 20b together limit the position of the corresponding battery cell 10.

[0114] In some embodiments, the battery 100 includes at least three rows of holders 20 arranged along the first direction A. Referring to Fig. 17 and Fig. 18, Fig. 17 is a schematic diagram of the arrangement of three rows of holders 20 according to some embodiments of the present application, and Fig. 18 is a structural schematic diagram of the battery 100 including three rows of holders 20 according to some embodiments of the present application, where for convenience of explanation, two rows of holders 20 located at the ends of the at least three rows of holders 20 are defined as a first row 20a and a second row 20b, respectively, and the remaining rows are defined as an intermediate row 20c, and each row of holders 20 includes a plurality of holders 20 arranged in parallel along the second direction B, the number of holders 20 in each row is the same, and one receiving portion 23 is provided in each holder 20, and the corresponding holders 20 in two adjacent rows together limit the position of the battery cell 10.

[0115] Each of the holders 20 in the first row 20a and the second row 20b is provided with one receiving portion 23, and each of the holders 20 in the middle row 20c is provided with two receiving portions 23 spaced apart from each other.

[0116] In some embodiments, the side of the holder 20 away from the corresponding battery cell 10 is flat.

[0117] In an embodiment in which the battery cell 10 includes two rows of holders 20, the sides of each holder 20 facing away from the battery cell 10 are flat, and in an embodiment in which the battery cell 10 includes at least three rows of holders 20, the sides of the holders 20 in the first row 20a and the second row 20b located at both ends facing away from the battery cell 10 are flat.

[0118] The side of the holder 20 away from the corresponding battery cell 10 is flat to facilitate attachment of the holder 20 and to better allow the holder 20 to engage other structures.

[0119] In some embodiments, two first stopper portions 13 are provided on the side wall 111, and the two first stopper portions 13 are spaced apart from each other along the axial direction on the side wall 111 of the housing 11. Each second stopper portion 21 is arranged to engage and join with one of the first stopper portions 13.

[0120] The two first stopper portions 13 are spaced apart along the axial direction of the battery cell 10, and the structures of the two first stopper portions 13 may be the same or different. For example, in some embodiments, the two first stopper portions 13 are both annular grooves installed in the side wall 111, and as another example, one of the two first stopper portions 13 is a locking groove and the other is a second protrusion (not shown).

[0121] The distance between the two first stopper portions 13 along the axial direction of the battery cell 10 does not exceed the size of the holder 20 along the axial direction of the battery cell 10.

[0122] The two first stopper portions 13 are arranged at intervals along the axial direction of the battery cell 10, and correspondingly, the holder 20 is provided with two second stopper portions 21 arranged at intervals along the axial direction of the battery cell 10, the second stopper portions 21 are arranged in one-to-one correspondence with the first stopper portions 13, and each second stopper portion 21 is arranged to engage and join with one first stopper portion 13, thereby providing stronger axial positional restriction for the battery cell 10.

[0123] In some embodiments, the housing 11 is cylindrical, although the housing 11 may also be a rectangular structure.

[0124] The housing 11 of the battery cell 10 is cylindrical, i.e., the housing 11 has a regular structure, which makes it easy to mount the battery cell 10 in the holder 20 .

[0125] 19, which is a structural schematic diagram of a battery 100 according to another embodiment of the present application. In some embodiments, the battery 100 further includes a housing 30, the battery cell 10 is accommodated in the housing 30, and the holder 20 is fixed in the housing 30.

[0126] The housing 30 is used to provide an installation space 31 for the battery cell 10 and the holder 20. In some embodiments, the housing 30 can include a first portion 32 and a second portion 33, and the first portion 32 and the second portion 33 are fitted together to define the installation space 31 for accommodating the battery cell 10. Note that the connection point between the first portion 32 and the second portion 33 can be actually sealed by a sealing member (not shown), which may be a sealing ring, a sealant, or the like.

[0127] The first part 32 and the second part 33 may have various shapes such as a rectangular parallelepiped or a cylindrical body. The first part 32 may have a hollow structure with one side open, and the second part 33 may also have a hollow structure with one side open, and the open side of the second part 33 is placed over the open side of the first part 32 to form the housing 30 having the mounting space 31. The first part 32 may have a hollow structure with one side open, and the second part 33 may have a plate-like structure, and the second part 33 is placed over the open side of the first part 32 to form the housing 30 having the mounting space 31.

[0128] The holder 20 can be fixed in the mounting space 31 of the housing 30 by a method such as a bolt, a screw, or an adhesive.

[0129] The holder 20 is fixed to the housing 30 to prevent the holder 20 from wobbling within the housing 30 , thereby reducing the possibility of the battery cell 10 wobbling within the housing 30 .

[0130] In the battery 100, the battery cell 10 may be one or more. If there are more than one battery cell 10, the battery cells 10 may be connected in series, in parallel, or in series-parallel, and a series-parallel connection means that the battery cells 10 are connected in parallel as well as in series. The battery cells 10 may be directly connected in series, in parallel, or in series-parallel, and then the entire battery cell 10 may be housed in the housing 30. Note that the battery cells 10 may first be connected in series, in parallel, or in series-parallel to form a battery 100 module, and the battery 100 modules may be further connected in series, in parallel, or in series-parallel to be integrally formed and housed in the housing 30.

[0131] In some embodiments, the battery 100 may further include a bus member (not shown), and electrical connection is realized between the multiple battery cells 10 through the bus member, thereby realizing a series connection, a parallel connection, or a series-parallel connection of the multiple battery cells 10.

[0132] 20, which is a structural schematic diagram of a battery 100 according to yet another embodiment of the present application. In some embodiments, the holder 20 is further provided with a flow passage 25 configured to accommodate a fluid for adjusting the temperature of the battery cell 10.

[0133] The fluid is accommodated in the flow path 25 and exchanges heat with the battery cell 10 through the holder 20, thereby adjusting the temperature of the battery cell 10. The fluid may be a gas or a liquid. The temperature of the battery cell 10 can be adjusted based on the temperature required for the normal operation of the battery 100. When the environmental temperature is low, the fluid in the flow path 25 adjusts the temperature of the battery cell 10 to be high, so that the battery cell 10 operates normally; when the environmental temperature or the temperature of the battery cell 10 is too high, the fluid in the flow path 25 lowers the temperature of the battery cell 10, so that the battery cell 10 operates normally and ensures the safety of the battery 100.

[0134] The flow passage 25 accommodates a fluid that adjusts the temperature of the battery cell 10, and not only adjusts the temperature of the battery cell 10, but also reduces the weight of the holder 20, thereby reducing the weight of the battery 100.

[0135] In some embodiments, the flow passages 25 extend along the axial direction of the battery cell 10 through both ends of the holder 20 .

[0136] The flow path 25 penetrates both ends of the holder 20 along the axial direction of the battery cell 10, and the fluid flows into the flow path 25 from one end of the flow path 25 and flows out of the flow path 25 from the other end of the flow path 25. As the fluid flows through the flow path 25, it exchanges heat with the battery cell 10 via the holder 20, thereby regulating the temperature of the battery cell 10.

[0137] At least one flow passage 25 is provided corresponding to each holder 20 .

[0138] The flow passages penetrate both ends of the holder 20, making it easier for the fluid flowing through the flow passages 25 to exchange heat with the battery cells 10, improving the efficiency of temperature regulation of the battery cells 10.

[0139] 12 and 13 , some embodiments of the present application provide a battery 100, which includes a battery cell 10 and two holders 20, in which the battery cell 10 is cylindrical, and two first stopper portions 13 are spaced apart from each other on the side wall 111 of the housing 11 along the axial direction of the battery cell 10, and each first stopper portion 13 is an annular groove. Each holder 20 is formed with a receiving portion 23, and a fitting surface 231 of the receiving portion 23 is an arcuate surface. Second stopper portions 21 are provided at both ends of each receiving portion 23 along the axial direction of the battery cell 10, and each second stopper portion 21 is provided with a notch 211, and the battery cell 10 is engaged into the notch 211 to insert the second stopper portion 21 into the first stopper portion 13. The two holders 20 engage opposite the outer periphery of the battery cell 10 from the radial direction of the battery cell 10, forming a covered space that is sealed in the circumferential direction and open at both axial ends, and both axial ends of the battery cell 10 extend from the sealed space and are located outside the two second stopper portions 21, thereby positioning the end cover 12 outside the sealed space.

[0140] An embodiment of the present application further provides a power consuming device, the power consuming device including the battery 100 provided by any of the embodiments above.

[0141] Please refer to FIG. 21, which is a flow chart of a method for manufacturing a battery 100 according to some embodiments of the present application. The method for manufacturing the battery 100 includes the following steps: Providing a battery cell 10, The battery cell 10 includes a housing 11 and an end cover 12 that are hermetically connected, and a first stopper portion 13 is provided on a side wall 111 of the housing 11 in step S100; A step S200 of providing a holder 20 on which a second stopper portion 21 is provided; and a step S300 of attaching the battery cell 10 to the holder 20 so as to realize an axial positional restriction of the battery cell 10 relative to the battery cell 10 by engaging and joining the second stopper portion 21 with the first stopper portion 13.

[0142] The engagement and connection between the first stopper portion 13 of the battery cell 10 and the second stopper portion 21 of the holder 20 not only realizes the axial position restriction for the battery cell 10, but also the second stopper portion 21 allows the end cover 12 to escape and provides space in the axial direction of the battery cell 10, so that the end cover 12 can be activated to release the pressure inside the battery cell 10 when the pressure or temperature inside the battery cell 10 reaches a threshold value. The end cover 12 can be activated to release the pressure without having to overcome the restriction of the second stopper portion 21 of the holder 20 that restricts the axial position of the battery cell 10, thereby avoiding the holder 20 from affecting the pressure release of the battery cell 10, and instantly releasing the pressure of the battery cell 10, thereby reducing the risk of the battery cell 10 exploding due to excessive internal pressure, and improving the safety of the battery cell 10.

[0143] 22, which is a structural schematic diagram of a battery manufacturing equipment 2000 according to an embodiment of the present application. The battery manufacturing equipment 2000 includes a providing device 2100 and an assembling device 2200. The providing device 2100 is configured to provide a battery cell 10 and a holder 20. The battery cell 10 includes a housing 11 and an end cover 12 that are hermetically connected, and a first stopper portion 13 is provided on a side wall 111 of the housing 11. A second stopper portion 21 is provided on the holder 20, and the assembling device 2200 is arranged to attach the battery cell 10 to the holder 20, and engages and joins the second stopper portion 21 with the first stopper portion 13, thereby restricting the position of the battery cell 10 at least in the axial direction of the battery cell 10.

[0144] The above description is merely a preferred embodiment of the present application, and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the scope of the spirit and principles of the present application should be included in the scope of protection of the present application. [Explanation of symbols]

[0145] 1000 vehicles 100 batteries 10 Battery Cells 11. Housing 111 Side wall 112 Aperture 113 Convex 12 End cover 13 First stopper part 14 Electrode Assembly 15 Insulating materials 20 Holder 21 Second stopper part 211 Notch 22 Main body 23 Storage unit 231 Mating surface 24 Contact surface 20a 1st row 20b 2nd row 20c middle row 25 Flow Path 30 Case 31 Installation space 32 Part 1 33 Part 2 200 Controller 300 Motor 2000 Battery manufacturing facilities 2100 Providing device 2200 Assembly Equipment A 1st direction B Second direction

Claims

1. A battery cell and a holder, The battery cell includes a housing and an end cover that are hermetically connected, and a first stopper portion is provided on a side wall of the housing. a second stopper portion is provided on the holder, the second stopper portion is arranged to engage and join with the first stopper portion, thereby limiting the position of the battery cell at least in an axial direction of the battery cell; The second stopper portion is a battery that is installed at an end portion of the holder along the axial direction.

2. The battery according to claim 1 , wherein one of the first stopper portion and the second stopper portion is a locking groove, and the other is a first protrusion.

3. The battery according to claim 2 , wherein the locking groove is an annular groove provided on the outer surface of the side wall.

4. a protrusion that protrudes into the inside of the battery cell is formed at a position on the inner surface of the side wall that corresponds to the annular groove; The battery according to claim 3 , wherein the protrusion is arranged to restrict movement of the end cover in a direction approaching an interior of the battery cell.

5. The battery described in any one of claims 1 to 4, wherein the holder further includes a main body portion connected to the second stopper portion, the main body portion is installed corresponding to the side wall, the second stopper portion and the main body portion surround a storage portion, and the storage portion is positioned to accommodate at least a portion of the side wall.

6. 6. The battery of claim 5, wherein two second stopper portions are provided at one end of the main body portion along the axial direction, and the two second stopper portions extend along opposite directions to form two accommodating portions with the main body portion, the two accommodating portions are provided on opposite sides of the holder away from each other, and one battery cell is correspondingly provided in each accommodating portion.

7. 7. The battery of claim 5 or 6, wherein the receiving portion has a mating surface, the mating surface being positioned to conform to a contour of an outer surface of the side wall.

8. The battery according to claim 7 , wherein the mating surface is an arcuate surface, and the mating surface is disposed so as to restrict a position of the battery cell along a radial direction of the battery cell.

9. The battery according to any one of claims 1 to 8, wherein the battery includes two of the holders, and the two holders are engaged with an outer periphery of one of the battery cells.

10. The battery of claim 9 , wherein the two holders are fixedly connected.

11. The battery according to any one of claims 1 to 10, wherein the battery includes a plurality of the holders arranged in parallel, and the plurality of holders are integrally molded.

12. The battery of claim 1 , wherein a side of the holder away from the corresponding battery cell is flat.

13. Two of the first stopper portions are provided on the side wall, and the two first stopper portions are arranged on the side wall of the housing at an interval along the axial direction, The battery according to any one of claims 1 to 12, wherein each of the second stopper portions is arranged to engage and join with one of the first stopper portions.

14. The battery of any one of claims 1 to 13, wherein the housing is cylindrical.

15. The battery according to any one of claims 1 to 14, wherein the battery further includes a housing, the battery cell is accommodated in the housing, and the holder is fixed within the housing.

16. The battery of any one of claims 1 to 15, wherein the holder is further provided with a flow path configured to contain a fluid for regulating a temperature of the battery cell.

17. The battery of claim 16 , wherein the flow passage extends through both ends of the holder along the axial direction of the battery cell.

18. A power consuming device comprising a battery according to any one of claims 1 to 17.

19. providing a battery cell, the battery cell including a housing and an end cover hermetically connected to each other, the housing having a first stopper portion provided on a side wall thereof; Providing a holder in which the second stop portion is provided; attaching the battery cell to the holder so that the second stopper portion and the first stopper portion are engaged and joined to realize an axial positional restriction of the battery cell relative to the battery cell; Including, A method for manufacturing a battery, wherein the second stopper portion is installed at an end portion of the holder along the axial direction.

20. a providing device; and an assembling device, the providing device is configured to provide a battery cell and a holder; The battery cell includes a housing and an end cover that are hermetically connected, and a first stopper portion is provided on a side wall of the housing. The holder is provided with a second stopper portion, the assembly device is arranged to attach the battery cell to the holder, and engages and joins the second stopper portion with the first stopper portion, thereby limiting the position of the battery cell at least in an axial direction of the battery cell; The second stopper portion is disposed at an end portion of the holder along the axial direction.

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