Battery monomer assembly, battery device and power utilization device

Abstract

The utility model discloses a battery monomer assembly, a battery device and a power utilization device, and belongs to the technical field of batteries. The battery monomer assembly comprises a battery unit and mounting plates, the battery unit comprises one or at least two battery monomers, the battery monomers are cylindrical, the mounting plates are arranged on the two opposite sides of the battery unit in the axial direction of the battery monomers, the sides, facing the battery unit, of the mounting plates are provided with retaining holes and lightening holes, the mounting plates are arranged on the battery monomers in a sleeving manner, and the retaining holes are communicated with the lightening holes. And the two ends of each battery monomer respectively penetrate through the retaining holes of the corresponding mounting plates. And the hollow lightening holes reduce the mass of the part of the mounting plate where the battery monomers are not mounted, so that the mass of the battery monomer assembly is relatively small, and the mass energy density of the battery monomer assembly is favorably improved. The lightening holes are formed in the side, facing the battery units, of the mounting plate, and the lightening holes cannot affect mounting of a structure, used for being connected with the battery monomers, on the side, deviating from the battery units, of the mounting plate.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell assembly, a battery device and an electrical device. Background Art

[0002] Batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used.

[0003] In a new energy vehicle equipped with a battery, the battery can be used to provide power in whole or in part. In the related art, the mass energy density of a battery cell assembly is low. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery cell assembly, a battery device and an electrical device to improve the mass energy density of the battery cell assembly.

[0005] This application is implemented through the following technical solutions.

[0006] A first aspect of an embodiment of the present application provides a battery cell assembly, comprising:

[0007] A battery unit, comprising one or at least two battery cells, wherein the battery cells are cylindrical in shape;

[0008] The mounting plate is provided on opposite sides of the battery unit along the axial direction of the battery unit, the mounting plate has a retaining hole and a weight-reducing hole on the side facing the battery unit, the mounting plate is sleeved on the battery unit, and the two ends of the battery unit are respectively passed through the retaining holes corresponding to the mounting plate.

[0009] In the embodiment of the present application, the hollow weight-reducing hole reduces the mass of the portion of the mounting plate where no battery cell is mounted, making the mass of the battery cell assembly smaller, which is beneficial to improving the mass energy density of the battery cell assembly. The weight-reducing hole will not affect the installation of the structure for connecting with the battery cell on the side of the mounting plate away from the battery unit.

[0010] In one embodiment, the retaining hole is circular in shape, and the ratio of the opening area of ​​the retaining hole of each side of the mounting plate to the area of ​​the corresponding mounting plate is in a range of 40% to 80%.

[0011] In the embodiment of the present application, the required approximate volume grouping efficiency of the battery cell assembly is obtained by constraining the proportion of the opening area of ​​the retaining hole of the mounting plate.

[0012] In one embodiment, the retaining hole is circular in shape, and the distance between the central axes of two adjacent retaining holes is greater than or equal to the sum of the diameter of the battery cell and 1 mm, and the unit of the diameter of the battery cell is millimeter.

[0013] In the embodiment of the present application, limiting the minimum distance between adjacent battery cells can better meet the thermal insulation requirements of the battery cells to prevent thermal runaway. The hole walls of adjacent retaining holes have a certain wall thickness, which is convenient for injection molding of the mounting plate.

[0014] In one embodiment, the arrangement direction of the mounting plates on both sides is a first direction, all the battery cells of the battery unit are arranged into at least two rows, at least two rows of the battery cells are arranged along a second direction, the second direction is cross-arranged with the first direction, the number of the battery cells in each row is at least two, at least two battery cells in each row are arranged along a third direction, the third direction is cross-arranged with the first direction and the second direction respectively, and the battery cells in two adjacent rows are staggered with each other.

[0015] In the embodiment of the present application, two adjacent rows of battery cells are staggered to fully utilize the space between two cylindrical battery cells, arrange as many battery cells as possible, and improve the volume utilization of the battery cell assembly.

[0016] In one embodiment, the mounting plate comprises:

[0017] plate body;

[0018] A collar is connected to a side of the plate body facing the battery unit, the collar is sleeved on the battery unit, and the collar and the plate body are arranged to form the retaining hole and the weight-reducing hole.

[0019] In the embodiment of the present application, the side facing the battery cell and the side facing away from the battery cell are separated as much as possible by the plate body, reducing the influence of the battery cell on the other side of the plate body. The collar can limit the position of the battery cell on the mounting plate and improve the firmness of the battery cell installation.

[0020] In one embodiment, the battery cell comprises a housing, an electrode assembly located in the housing, and a conductive terminal mounted on the housing, wherein the conductive terminal is electrically connected to the electrode assembly, the battery cell assembly further comprises a current collecting plate electrically connected to the conductive terminal, and the mounting plate further comprises:

[0021] A positioning post connected to a side of the plate body away from the battery unit, and the current collecting plate is sleeved on the positioning post;

[0022] A first supporting rib is connected to the plate body, the first supporting rib is located in the weight-reducing hole, and along the axial projection of the positioning column, the projection area of ​​the positioning column at least partially overlaps with the projection area of ​​the first supporting rib.

[0023] In the embodiment of the present application, the positioning posts facilitate the installation and positioning of the current collector plate. The structure of the positioning posts is strengthened by the first support ribs. There are no weight-reducing holes on the side of the mounting plate facing away from the battery cell. The side of the mounting plate facing away from the battery cell can be arranged according to the installation requirements of the current collector plate, and the current collector plate is not restricted by the shape of the weight-reducing holes of the mounting plate.

[0024] In one embodiment, the plate body is formed with mounting holes, the mounting holes penetrate through the plate body to communicate with the corresponding weight-reducing holes, and the mounting plate further includes:

[0025] A ring rib located in the weight-reducing hole, the ring rib surrounds the mounting hole, the ring rib is connected to the plate body, and the first support rib is connected to the corresponding ring rib;

[0026] A first connecting member that penetrates through the current collector plate, and the first connecting member is disposed through the corresponding mounting hole to mount the current collector plate on the plate body.

[0027] In the embodiment of the present application, the ring rib supports and strengthens the plate body at the mounting hole, which is beneficial for the first connecting member to better mount the current collector plate.

[0028] In one embodiment, the mounting plate further includes a second support rib located in the weight-reducing hole, the second support rib is respectively connected to the ring rib and the collar, and along the axial projection of the positioning post, the projection area of the second support rib is offset from the projection area of the positioning post.

[0029] In the embodiment of the present application, the second support rib strengthens the ring rib and helps the ring rib bear the load of the current collector plate acting on the ring rib.

[0030] In one embodiment, the mounting plate further includes a third support rib located in the weight-reducing hole, the third support rib is respectively connected to the first support rib and the collar.

[0031] In the embodiment of the present application, the third support rib strengthens the first support rib.

[0032] In one embodiment, the third support ribs are connected to both opposite sides of the first support rib.

[0033] In the embodiment of the present application, the third support ribs support the first support rib well from both sides, the third support rib strengthens the first reinforcing rib, which is beneficial to strengthening the positioning post and enabling the first support rib to bear the load evenly.

[0034] In the second aspect of the embodiment of the present application, a battery device is provided, including:

[0035] A box body;

[0036] The battery cell assembly according to any one of the above, the battery cell assembly is mounted on the box body.

[0037] In the embodiment of the present application, the hollow weight-reducing holes reduce the mass of the part of the mounting plate where the battery cells are not installed, making the mass of the battery cell assembly relatively small, which is beneficial to improving the mass energy density of the battery cell assembly. The weight-reducing holes will not affect the installation of the structure for connecting with the battery cells on the side of the mounting plate facing away from the battery unit.

[0038] The third aspect of the embodiment of the present application provides an electrical device, including:

[0039] A device body;

[0040] The battery device according to any one of the above, and the battery device is installed on the device body.

[0041] In the embodiment of the present application, the hollow weight-reducing holes reduce the mass of the part of the mounting plate where the battery cells are not installed, making the mass of the battery cell assembly relatively small, which is beneficial to improving the mass energy density of the battery cell assembly. The weight-reducing holes will not affect the installation of the structure for connecting with the battery cells on the side of the mounting plate facing away from the battery unit. Description of the Drawings

[0042] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0043] Figure 1 is a schematic structural diagram of the battery cell assembly of the embodiment of the present application. In the figure, the battery unit is schematically simplified, and each battery cell of the battery unit is not shown;

[0044] Figure 2 is Figure 1 a cross-sectional view taken along line A-A in, showing a partial cross-section in the length direction of the mounting plate;

[0045] Figure 3 is Figure 2 an enlarged view at C in

[0046] Figure 4 is Figure 1 a projection view at B in, showing a partial structure in the length direction of the mounting plate;

[0047] Figure 5 is a schematic structural diagram of the battery cell, showing the electrode assembly of the battery cell.

[0048] Description of the Reference Numerals

[0049] 1. Battery cell; 11. Battery monomer; 111. Outer shell; 112. Electrode assembly; 113. Conductive terminal; 2. Mounting plate; 21. Holding hole; 22. Weight reduction hole; 23. Plate body; 231. Mounting hole; 24. Collar; 25. Positioning post; 26. First support rib; 27. Second support rib; 28. Third support rib; 29. Ring rib; 3. First connecting piece; 4. Current collector plate. Detailed implementation manners

[0050] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field 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 drawings are intended to cover non-exclusive inclusion.

[0052] In the description of the embodiments of this application, technical terms such as "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality" means more than two unless otherwise specifically defined.

[0053] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0054] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0057] In the related art, the battery unit is arranged on a mounting plate, and the battery cells are cylindrical. When the cylindrical battery cells are arranged on the mounting plate, the contact area between the cylindrical battery cells is small, and there are large gaps between adjacent cylindrical battery cells on the mounting plate. The area on the mounting plate used to install the battery cells accounts for a small proportion, and the portion of the mounting plate where the battery cells are not installed is a solid structure. The portion of the mounting plate where the battery cells are not installed has a large mass, which makes the mass energy density of the battery cell assembly low.

[0058] In the battery cell assembly of the embodiment of the present application, mounting plates 2 are provided on opposite sides of the battery cell 1 along the axial direction of the battery cell 11, and the mounting plate 2 has a retaining hole 21 and a weight-reducing hole 22 on the side facing the battery cell 1, so as to reduce the mass of the mounting plate 2 and improve the mass energy density of the battery cell assembly.

[0059] The battery cell assembly of the embodiment of the present application is suitable for a battery device.

[0060] An embodiment of the present application provides a battery device, which includes a box and a battery cell assembly, wherein the battery cell assembly is installed in the box.

[0061] The battery device may be an energy storage device or a battery pack.

[0062] Energy storage devices are devices that store electrical energy, such as energy storage cabinets or energy storage containers.

[0063] The battery device may include one or at least two battery cell assemblies.

[0064] An embodiment of the present application provides an electrical device, which includes a device body and a battery device, wherein the battery device is installed in the device body.

[0065] An electrical device is a device that uses electrical energy as its energy source and realizes corresponding functions by consuming electrical energy. Exemplarily, the electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric plane toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0066] The device body refers to the main structure that consumes electrical energy to realize corresponding functions. For example, if the electrical device is a mobile phone, the device body is the part that can realize functions such as communication, and is powered by the battery cell 11 or the battery pack to the part that can realize functions such as communication. For example, if the electrical device is a car, the device body is the part for people to ride and can travel on the road, and is powered by the battery cell 11 or the battery pack to the part for people to ride and can travel on the road.

[0067] Taking the electrical device of an embodiment of the present application as a vehicle and the battery device as a battery pack as an example for illustration.

[0068] The vehicle provided by an embodiment of the present application can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery pack is arranged inside the vehicle, and the battery pack can be arranged at the bottom, head or tail of the vehicle. The battery pack can be used for power supply of the vehicle. For example, the battery pack can be used as the operating power source of the vehicle. The vehicle can also include a controller and a motor, and the controller can be used to control the battery pack to supply power to the motor. For example, the battery pack can be used for the working power requirements of vehicle starting, navigation and driving.

[0069] In some embodiments of the present application, the battery cell assembly can not only be used as the operating power source of the vehicle, but also be used as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0070] For the battery cell assembly of the embodiment of the present application, please refer to Figures 1 to 4 , the battery cell assembly includes a battery unit 1 and a mounting plate 2. The battery unit 1 includes one or at least two battery cells 11. The shape of the battery cell 11 is cylindrical. Mounting plates 2 are arranged on opposite sides of the battery unit 1 along the axial direction of the battery cell 11. The side of the mounting plate 2 facing the battery unit 1 has a holding hole 21 and a weight-reducing hole 22. The mounting plate 2 is sleeved on the battery cell 11, and both ends of the battery cell 11 respectively pass through the holding holes 21 of the corresponding mounting plates 2.

[0071] The battery unit 1 includes at least two battery cells 11, and at least two battery cells 11 can be connected in series, in parallel or in a mixed connection. The mixed connection means that there are both series and parallel connections among at least two battery cells 11.

[0072] The battery cell 11 includes a housing 111, an electrode assembly 112, and a conductive terminal 113. The housing 111 can be a sealed structure or a non-sealed structure. Exemplarily, when the housing 111 is a non-sealed structure, the housing 111 functions to protect the motor assembly, and a sealing bag is further included between the housing 111 and the electrode assembly 112, and the sealing bag is used to encapsulate the electrode assembly 112 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. Exemplarily, the conductive terminal 113 can be a positive and negative electrode post.

[0073] The electrode assembly 112 can be a wound structure or a stacked structure.

[0074] The battery cell 11 can be a secondary battery, which refers to a battery cell 11 that can be activated by charging after discharging to continue to be used.

[0075] The battery cell 11 can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0076] The battery cell assembly can further include other structures. For example, the battery cell assembly can further include a busbar component for realizing electrical connection between at least two battery cells 11.

[0077] The battery cell assembly can be a battery module. The battery module is formed by arranging and fixing a plurality of battery cells 11 to form an independent module.

[0078] Exemplarily, each side mounting plate 2 straddles all the battery cells 11 in the battery unit 1.

[0079] For the sake of convenience of description, as Figures 1 to 4 shown, the first direction is the direction indicated by the arrow of R1, the second direction is the direction indicated by the arrow of R2, and the third direction is the direction indicated by the arrow of R3.

[0080] Exemplarily, the first direction and the second direction are perpendicularly crossed, the second direction and the third direction are perpendicularly crossed, and the first direction and the second direction are perpendicularly crossed.

[0081] In an embodiment of the present application, on one side of the mounting plate 2 facing the battery unit 1, there are holding holes 21 and weight-reducing holes 22. Both ends of the battery cell 11 are passed through the holding holes 21 to be mounted on the mounting plate 2. The hollow weight-reducing holes 22 reduce the mass of the portion of the mounting plate 2 where the battery cell 11 is not mounted, making the mass of the battery cell assembly smaller, which is beneficial to improving the mass energy density of the battery cell assembly. The weight-reducing holes 22 are on the side of the mounting plate 2 facing the battery unit 1, and the weight-reducing holes 22 will not affect the installation of the structure for connecting with the battery cell 11 on the side of the mounting plate 2 facing away from the battery unit 1.

[0082] In one embodiment, please refer to Figures 1 to 4 , the shape of the holding hole 21 is circular, and the range of the ratio of the opening area of the holding hole 21 on each side of the mounting plate 2 to the area of the corresponding mounting plate 2 is 40% to 80%.

[0083] It should be noted that the ratio of the opening area of the holding hole 21 on each side of the mounting plate 2 to the area of the corresponding mounting plate 2 is equivalent to the volume grouping efficiency. The volume grouping efficiency is the volume of all the battery cells 11 in the battery cell assembly divided by the volume of the battery cell assembly.

[0084] Exemplarily, the ratio of the opening area of the holding hole 21 of the mounting plate 2 to the area of the corresponding mounting plate 2 is 40%, 50%, 60%, 70% or 80%.

[0085] In an embodiment of the present application, by restricting the proportion of the opening area of the holding hole 21 of the mounting plate 2, the corresponding approximate volume grouping efficiency of the battery cell assembly can be obtained.

[0086] It can be understood that the ratio of the opening area of the holding hole 21 of the mounting plate 2 to the area of the corresponding mounting plate 2 is not limited. Exemplarily, the ratio of the opening area of the holding hole 21 of the mounting plate 2 to the area of the corresponding mounting plate 2 is 30% or 90%.

[0087] In one embodiment, please refer to Figures 1 to 4 , the shape of the holding hole 21 is circular, and the distance between the central axes of two adjacent holding holes 21 is greater than or equal to the sum of the diameter of the battery cell 11 and 1 millimeter, and the unit of the diameter of the battery cell 11 is millimeter.

[0088] Exemplarily, the mounting plate 2 is a plate part formed by injection molding.

[0089] Exemplarily, the mounting plate 2 is a cut piece.

[0090] For the convenience of description, as Figure 2 shown, the diameter of the battery cell 11 is the distance shown as D1, and the distance between the central axes of the two holding holes 21 is the distance shown as D2.

[0091] In the embodiments of the present application, the distance between the central axes of two adjacent holding holes 21 is greater than or equal to the sum of the diameter of the battery cell 11 and 1 mm, which limits the minimum distance between adjacent battery cells 11 and can better meet the heat insulation requirements for preventing thermal runaway of the battery cell 11. The distance between the central axes of two adjacent holding holes 21 is greater than or equal to the sum of the diameter of the battery cell 11 and 1 mm. There is a certain wall thickness between the hole walls of the adjacent holding holes 21, so that there is space between the holding holes 21 for materials to enter, which is convenient for the injection molding of the mounting plate 2.

[0092] It can be understood that the distance between the central axes of two adjacent holding holes 21 is not limited to being greater than or equal to the sum of the diameter of the battery cell 11 and 1 mm. Exemplarily, the distance between the central axes of two adjacent holding holes 21 is less than the sum of twice the diameter of the battery cell 11 and 1 mm.

[0093] In one embodiment, please refer to Figures 1 to 4 , the arrangement direction of the two side mounting plates 2 is the first direction. All the battery cells 11 of the battery unit 1 are arranged in at least two rows. The at least two rows of battery cells 11 are arranged in the second direction, and the second direction intersects with the first direction. The number of battery cells 11 in each row is at least two, and the at least two battery cells 11 in each row are arranged in the third direction, and the third direction intersects with the first direction and the second direction respectively. The adjacent two rows of battery cells 11 are staggered from each other.

[0094] It should be noted that the adjacent two rows of battery cells 11 being staggered from each other means that, projected along the second direction, the central axes of the adjacent two rows of battery cells 11 do not coincide.

[0095] In the embodiments of the present application, the adjacent two rows of battery cells 11 are staggered from each other, making full use of the space between two cylindrical battery cells 11, arranging as many battery cells 11 as possible, and improving the volume utilization rate of the battery cell assembly.

[0096] It can be understood that the adjacent two rows of battery cells 11 are not limited to being staggered from each other. Exemplarily, projected along the second direction, the central axes of the adjacent two rows of battery cells 11 coincide.

[0097] In one embodiment, please refer to Figures 2 to 4 , the mounting plate 2 includes a plate body 23 and a collar 24. The collar 24 is connected to the side of the plate body 23 facing the battery unit 1. The collar 24 is sleeved on the battery cell 11, and the collar 24 and the plate body 23 enclose a holding hole 21 and a weight reduction hole 22.

[0098] In the embodiments of the present application, the plate body 23 separates the side facing the battery cell 1 and the side facing away from the battery cell 1 as much as possible, reducing the influence of the battery cell 1 on the other side of the plate body 23. The collar 24 is sleeved on the battery cell 11, and the collar 24 can limit the position of the battery cell 11 on the mounting plate 2, improving the firmness of the installation of the battery cell 11.

[0099] It can be understood that the mounting plate 2 may not be limited to being provided with the collar 24. Exemplarily, the mounting plate 2 abuts against the battery cell 11.

[0100] In one embodiment, please refer to Figures 2 to 5 , the battery cell 11 includes a housing 111, an electrode assembly 112 located inside the housing 111, and a conductive terminal 113 mounted on the housing 111. The conductive terminal 113 is electrically connected to the electrode assembly 112. The battery cell 1 assembly further includes a current collector plate 4 electrically connected to the conductive terminal 113. The mounting plate 2 further includes a positioning post 25 and a first support rib 26. The positioning post 25 is connected to the side of the plate body 23 facing away from the battery cell 1. The current collector plate 4 is sleeved on the positioning post 25. The first support rib 26 is connected to the plate body 23. The first support rib 26 is located in the weight reduction hole 22. Along the axial projection of the positioning post 25, at least part of the projection area of the positioning post 25 overlaps with the projection area of the first support rib 26.

[0101] It should be noted that the current collector plate 4 is sleeved on the positioning post 25 on the side of the plate body 23 facing away from the battery cell 1.

[0102] In the embodiments of the present application, the current collector plate 4 is sleeved on the positioning post 25. The current collector plate 4 is first aligned with the positioning post 25 to determine the installation position of the current collector plate 4 on the mounting plate 2. The positioning post 25 facilitates the installation and positioning of the current collector plate 4, and the positioning post 25 can also bear part of the load of the current collector plate 4. At least part of the projection area of the positioning post 25 overlaps with the projection area of the first support rib 26. The axial force of the positioning post 25 can be transmitted to the first support rib 26 through the plate body 23, and the first support rib 26 is used to structurally strengthen the positioning post 25. There is no weight reduction hole 22 on the side of the mounting plate 2 facing away from the battery cell 11. The side of the mounting plate 2 facing away from the battery cell 11 can be arranged according to the installation requirements of the current collector plate 4, and the current collector plate 4 is not limited by the shape of the weight reduction hole 22 of the mounting plate 2.

[0103] It can be understood that the mounting plate 2 is not limited to being provided with the positioning post 25 and the first support rib 26. Exemplarily, the current collector plate 4 is directly connected to the mounting plate 2.

[0104] In one embodiment, please refer to Figures 2 to 4, the plate body 23 is formed with mounting holes 231 which penetrate through the plate body 23 to communicate with corresponding weight-reducing holes 22. The mounting plate 2 further includes a ring rib 29 and a first connecting member 3. The ring rib 29 is located within the weight-reducing hole 22, surrounds the mounting hole 231, and is connected to the plate body 23. The first support rib 26 is connected to the corresponding ring rib 29. The first connecting member 3 penetrates through the current collecting plate 4 and is inserted into the corresponding mounting hole 231 to mount the current collecting plate 4 on the plate body 23.

[0105] It should be noted that the fact that the mounting hole 231 penetrates through the plate body 23 to communicate with the corresponding weight-reducing hole 22 means that along the axial projection of the mounting hole 231, the projection area of the mounting hole 231 is located within the projection area of the weight-reducing hole 22.

[0106] In the embodiment of the present application, the mounting hole 231 and the first connecting member 3 are used to mount and fix the current collecting plate 4. The fact that the mounting hole 231 penetrates through the plate body 23 results in relatively weak structural strength of the plate body 23 near the mounting hole 231. The ring rib 29 supports the plate body 23 at the mounting hole 231 to strengthen the plate body 23 at the mounting hole 231, reducing the possibility of damage to the plate body 23 at the mounting hole 231 caused by the load of the current collecting plate 4, which is beneficial for the first connecting member 3 to better mount the current collecting plate 4.

[0107] It can be understood that the mounting plate 2 may not be provided with the ring rib 29.

[0108] In one embodiment, please refer to Figures 2 to 4 , the mounting plate 2 further includes a second support rib 27 located within the weight-reducing hole 22. The second support rib 27 is respectively connected to the ring rib 29 and the collar 24. Along the axial projection of the positioning post 25, the projection area of the second support rib 27 is offset from the projection area of the positioning post 25.

[0109] It should be noted that the fact that the projection area of the second support rib 27 is offset from the projection area of the positioning post 25 means that the projection area of the second support rib 27 does not overlap with the projection area of the positioning post 25.

[0110] In the embodiment of the present application, the second support rib 27 is respectively connected to the ring rib 29 and the collar 24. The second support rib 27 strengthens the ring rib 29 and helps the ring rib 29 bear the load of the current collecting plate 4 acting on the ring rib 29.

[0111] It can be understood that the second support rib 27 is not limited to being respectively connected to the ring rib 29 and the collar 24. Exemplarily, one end of the second support rib 27 is spaced from the ring rib 29, and the other end is connected to the collar 24.

[0112] In one embodiment, please refer to Figures 2 to 4 , the mounting plate 2 further includes a third support rib 28 located within the weight-reducing hole 22. The third support rib 28 is respectively connected to the first support rib 26 and the collar 24.

[0113] In the embodiment of the present application, the third support rib 28 is respectively connected to the first support rib 26 and the collar 24. The third support rib 28 strengthens the first support rib 26, and thus strengthens the positioning post 25.

[0114] It can be understood that the third support rib 28 is not limited to being respectively connected to the first support rib 26 and the collar 24. Exemplarily, one end of the third support rib 28 is spaced from the first support rib 26, and the other end is connected to the collar 24.

[0115] In one embodiment, please refer to Figures 2 to 4 , third support ribs 28 are connected to both opposite sides of the first support rib 26.

[0116] In the embodiment of the present application, the third support rib 28 supports the first support rib 26 well from both sides. The third support rib 28 strengthens the first reinforcing rib, which is beneficial to strengthening the positioning post 25 and enabling the first support rib 26 to bear evenly.

[0117] It can be understood that third support ribs 28 are not limited to being connected to both opposite sides of the first support rib 26. Exemplarily, only one side of the first support rib 26 is connected to a third support rib 28.

[0118] In one embodiment, please refer to Figures 1 to 5The battery unit 1 includes one or at least two battery cells 11. The battery cells 11 are cylindrical in shape. The battery cells 1 are provided with mounting plates 2 on opposite sides of the axial direction of the battery cells 11. The mounting plate 2 has a retaining hole 21 and a weight-reducing hole 22 on the side facing the battery unit 1. The mounting plate 2 is sleeved on the battery cells 11. The two ends of the battery cells 11 are respectively penetrated through the retaining holes 21 of the corresponding mounting plates 2. The retaining holes 21 are circular in shape. The ratio of the opening area of ​​the retaining holes 21 of the mounting plates 2 on each side to the area of ​​the corresponding mounting plates 2 is in the range of 40% to 80%. The retaining holes 21 are circular in shape. The distance between the central axes of two adjacent retaining holes 21 is greater than or equal to the diameter of the battery cell 11. The sum of the diameter and 1 mm, the unit of the diameter of the battery cell 11 is mm, the arrangement direction of the mounting plates 2 on both sides is the first direction, all the battery cells 11 of the battery unit 1 are arranged in at least two rows, at least two rows of battery cells 11 are arranged along the second direction, the second direction is arranged crosswise with the first direction, the number of battery cells 11 in each row is at least two, at least two battery cells 11 in each row are arranged along the third direction, the third direction is arranged crosswise with the first direction and the second direction respectively, the two adjacent rows of battery cells 11 are staggered, the collar 24 is connected to the side of the plate 23 facing the battery unit 1, the collar 24 is sleeved on the battery cell 11, the collar 24 and the plate 23 are surrounded by a retaining hole 21 and a weight reduction hole 22, and the conductive The terminal 113 is electrically connected to the electrode assembly 112, the battery cell 1 assembly also includes a current collecting plate 4 electrically connected to the conductive terminal 113, the mounting plate 2 also includes a positioning column 25 and a first supporting rib 26, the positioning column 25 is connected to the side of the plate body 23 away from the battery cell 1, the current collecting plate 4 is sleeved on the positioning column 25, the first supporting rib 26 is connected to the plate body 23, the first supporting rib 26 is located in the weight-reducing hole 22, along the axial projection of the positioning column 25, the projection area of ​​the positioning column 25 and the projection area of ​​the first supporting rib 26 at least partially overlap, the mounting hole 231 passes through the plate body 23 to communicate with the corresponding weight-reducing hole 22, the annular rib 29 is located in the weight-reducing hole 22, the annular rib 29 is arranged around the mounting hole 231, and the annular rib 29 is arranged around the mounting hole 231. The rib 29 is connected to the plate body 23, the first support rib 26 is connected to the corresponding annular rib 29, the first connecting member 3 passes through the collector plate 4, and the first connecting member 3 is penetrated in the corresponding mounting hole 231 to mount the collector plate 4 on the plate body 23. The mounting plate 2 also includes a second support rib 27 located in the lightening hole 22, and the second support rib 27 is respectively connected to the annular rib 29 and the collar 24. Along the axial projection of the positioning column 25, the projection area of ​​the second support rib 27 is staggered with the projection area of ​​the positioning column 25. The mounting plate 2 also includes a third support rib 28 located in the lightening hole 22, and the third support rib 28 is respectively connected to the first support rib 26 and the collar 24, and the third support rib 28 is connected to the opposite sides of the first support rib 26.

[0119] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell component, characterized in that, include: A battery unit, comprising one or at least two battery cells, wherein the battery cells are cylindrical in shape; The mounting plate is provided on opposite sides of the battery unit along the axial direction of the battery unit, the mounting plate has a retaining hole and a weight-reducing hole on the side facing the battery unit, the mounting plate is sleeved on the battery unit, and the two ends of the battery unit are respectively passed through the retaining holes corresponding to the mounting plate.

2. The battery cell assembly according to claim 1, characterized in that, The retaining hole is circular in shape, and the ratio of the opening area of ​​the retaining hole of each side of the mounting plate to the area of ​​the corresponding mounting plate is in a range of 40% to 80%.

3. The battery cell assembly according to claim 1, wherein, The retaining hole is circular in shape, and the distance between the central axes of two adjacent retaining holes is greater than or equal to the sum of the diameter of the battery cell and 1 mm, and the unit of the diameter of the battery cell is mm.

4. The battery cell assembly according to claim 1, characterized in that, The arrangement direction of the mounting plates on both sides is a first direction, and all the battery cells of the battery unit are arranged into at least two rows, and at least two rows of the battery cells are arranged along a second direction, and the second direction is arranged crosswise with the first direction. The number of the battery cells in each row is at least two, and at least two battery cells in each row are arranged along a third direction, and the third direction is arranged crosswise with the first direction and the second direction respectively, and the battery cells in two adjacent rows are staggered with each other.

5. The battery cell assembly according to any one of claims 1 to 4, characterized in that, The mounting plate comprises: plate body; A collar is connected to a side of the plate body facing the battery unit, the collar is sleeved on the battery unit, and the collar and the plate body are arranged to form the retaining hole and the weight-reducing hole.

6. The battery cell assembly according to claim 5, wherein, The battery cell comprises a housing, an electrode assembly located in the housing, and a conductive terminal mounted on the housing, wherein the conductive terminal is electrically connected to the electrode assembly, the battery cell assembly further comprises a current collecting plate electrically connected to the conductive terminal, and the mounting plate further comprises: A positioning post connected to a side of the plate body away from the battery unit, and the current collecting plate is sleeved on the positioning post; A first support rib is connected to the plate body, the first support rib is located in the weight-reducing hole, and along the axial projection of the positioning column, the projection area of ​​the positioning column at least partially overlaps with the projection area of ​​the first support rib.

7. The battery cell assembly according to claim 6, wherein, The plate body is formed with a mounting hole, the mounting hole penetrates the plate body to communicate with the corresponding weight-reducing hole, and the mounting plate further comprises: An annular rib, located in the weight-reducing hole, the annular rib is arranged around the mounting hole, the annular rib is connected to the plate body, and the first supporting rib is connected to the corresponding annular rib; The first connecting member passes through the current collecting plate, and the first connecting member is penetrated through the corresponding mounting hole to mount the current collecting plate on the plate body.

8. The battery cell assembly according to claim 7, wherein, The mounting plate also includes a second supporting rib located in the weight-reducing hole, the second supporting rib being connected to the annular rib and the sleeve ring respectively, and along the axial projection of the positioning column, the projection area of ​​the second supporting rib is staggered with the projection area of ​​the positioning column.

9. The battery cell assembly according to claim 6, characterized in that, The mounting plate further comprises a third supporting rib located in the weight-reducing hole, and the third supporting rib is respectively connected to the first supporting rib and the collar.

10. The battery cell assembly according to claim 9, characterized in that, The third supporting ribs are connected to opposite sides of the first supporting ribs.

11. A battery device, characterized in that, include: Box; The battery cell assembly according to any one of claims 1 to 10, wherein the battery cell assembly is installed in the box body.

12. An electrical device, characterized in that, Comprising: The device main body; The battery device according to claim 11, wherein the battery device is installed in the device main body.

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