Battery, electric device and method for manufacturing battery

Abstract

The present application relates to the field of battery technology, and in particular to a battery, an electrical device, and a method for manufacturing a battery. The battery includes: a box with a chamber inside; a single cell module, which is arranged in the chamber and includes at least one battery cell; and a filler, which is arranged in the gap between the single cell module and the inner wall of the box, and includes a glue layer and a filling layer, wherein the filling layer is a non-glue material and is stacked with the glue layer. Based on this, the amount of glue applied can be effectively reduced, and the battery structure can be optimized.

Description

Technical Field

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

[0002] At present, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. However, the structure of batteries still needs to be optimized. Summary of the invention

[0003] A technical problem to be solved by this application is to optimize the structure of the battery.

[0004] In order to solve the above technical problems, the first aspect of the present application provides a battery, comprising:

[0005] a box with a chamber inside;

[0006] a cell module disposed in the chamber and comprising at least one battery cell; and

[0007] The filler is arranged in the gap between the single module and the inner wall of the box, and comprises a glue layer and a filling layer. The filling layer is a non-glue material and is stacked with the glue layer.

[0008] Based on the above arrangement, since the gap between the single module and the box is no longer entirely filled with glue, the amount of glue used can be effectively reduced, glue waste can be prevented, and the battery structure can be optimized.

[0009] In some embodiments, the density of the filling layer is less than that of the glue layer. In this way, the weight can be further reduced and the energy density of the battery can be increased while reducing the amount of glue used.

[0010] In some embodiments, the filling layer is a particle layer. In this way, the weight can be further reduced and the energy density of the battery can be increased while reducing the amount of glue used.

[0011] In some embodiments, the filling layer includes foam, silica gel particles or high molecular organic particles. In this case, the filling layer is a light particle layer, which can reduce the weight more effectively and improve the energy density of the battery while reducing the amount of glue.

[0012] In some embodiments, the filling layer and the adhesive layer are alternately stacked, so that it is easier to achieve gluing of at least two positions spaced apart from each other, which is conducive to obtaining a better bonding effect.

[0013] In some embodiments, in the stacking direction of the glue layer and the filling layer, the size of the filler is equal to the size of the cavity, which is conducive to further improving the stability of the arrangement of the single module in the box.

[0014] In some embodiments, the size of the adhesive layer and the filling layer in the stacking direction each accounts for at least 5% of the size of the chamber in the stacking direction. In this way, the proportion of each adhesive layer and each filling layer will not be too small, which not only facilitates meeting the requirements of the effective bonding area, but also reduces the difficulty of filling and makes the filling accuracy easier to control.

[0015] In some embodiments, the size of the glue layer in the stacking direction is 10 to 30 mm. Based on this, it is convenient to reduce the amount of glue, reduce the number of glue injections, and reduce the difficulty of glue injection while meeting the requirements of the effective bonding area.

[0016] In some embodiments, the size of the filling layer in the stacking direction is 3 to 10 mm. Based on this, it is convenient to reduce the amount of glue while meeting the effective bonding area requirements and to achieve effective separation of different glue layers.

[0017] In some embodiments, the box includes a sleeve and two covers, the two covers are arranged at opposite ends of the sleeve along the first direction, at least one of the two covers is detachably connected to the sleeve, and the stacking direction of the filling layer and the glue layer is along the first direction. Based on this, the structure and operation are relatively simple, and it is also convenient to more accurately control the position of the glue layer, so that the glue layer can more accurately bond the battery cell and the box in the required bonding area to obtain better strength performance.

[0018] In some embodiments, the filler is disposed in the gap between the single module and the sleeve, which makes filling more convenient and provides a better bonding effect.

[0019] In some embodiments, the sleeve includes two side plates and two end plates connected to each other, the two side plates are arranged relative to each other along the second direction, the two end plates are arranged relative to each other along the third direction, the second direction and the third direction are perpendicular to each other and both perpendicular to the first direction, and the filler is arranged in the gap between the single module and the side plates. In this case, it is more convenient to fill the filler, and it is also more conducive to improving the overall strength of the battery.

[0020] In some embodiments, the side plate is perpendicular to the largest surface of the battery cell, which is conducive to achieving a stronger bonding between the cell module and the box.

[0021] A second aspect of the present application provides an electrical device, which includes a main body and also includes a battery according to an embodiment of the present application. The battery is arranged on the main body and provides electrical energy for the main body.

[0022] Since the structure of the battery according to the embodiment of the present application is optimized, the structure of the electrical device including the battery according to the embodiment of the present application is also optimized.

[0023] The third aspect of the present application also provides a method for manufacturing a battery, which comprises:

[0024] placing a cell module including at least one battery cell into a box; and

[0025] A glue layer is filled in the gap between the single module and the inner wall of the box, and a filling layer of a non-glue material is filled in the gap, so that the filling layer and the glue layer are stacked.

[0026] The battery manufactured by the manufacturing method has a reduced amount of glue.

[0027] In some embodiments, when filling the gap with the glue layer and the filling layer, the glue layer and the filling layer are filled alternately, so that it is easier to achieve gluing of at least two positions spaced apart from each other, which is conducive to obtaining a better bonding effect.

[0028] In the present application, since the gap between the battery cell and the inner wall of the box is no longer completely filled with glue, but is filled with glue layers and filling layers, the amount of glue applied can be effectively reduced, thereby achieving optimization of the battery structure.

[0029] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 Schematic diagram of the structure of the electrical device in the embodiment of the present application.

[0032] Figure 2 Schematic diagram of the explosion of the battery in the embodiment of the present application.

[0033] Figure 3 for Figure 2 Schematic diagram of the explosion of a battery cell.

[0034] Figure 4 for Figure 2 A schematic top view of a portion of the battery shown.

[0035] Figure 5 for Figure 4AA section view.

[0036] Figure 6 for Figure 5 B is a partial enlarged schematic diagram.

[0037] Figure 7 Schematic diagram of the manufacturing method in the embodiment of the present application.

[0038] Description of reference numerals:

[0039] 100, electrical device; 101, vehicle; 102, controller; 103, power equipment; 104, motor; 10, battery; 20, body; 30, single module;

[0040] 1. Battery cell; 11. Electrode assembly; 12. Shell; 13. Shell; 14. End cap; 15. Adapter; 16. Electrode terminal; 17. Tab; 18. Isolator; 19. Maximum surface;

[0041] 2. Box; 21. Sleeve; 22. Cover; 24. Chamber; 25. Side plate; 26. End plate;

[0042] 3. Filler; 31. Glue layer; 32. Filling layer; 33. Granular layer;

[0043] 4. Clearance;

[0044] Z, first direction; X, second direction; Y, third direction. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of this application.

[0046] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0047] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0048] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0049] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0050] With the rapid development of electronic products, electric vehicles and other electrical devices, the application of batteries is becoming more and more extensive, and the requirements for battery performance are also constantly increasing.

[0051] There are many factors that affect battery performance. Over the years, those skilled in the art have tried to improve the structure of batteries from many different angles to improve battery performance. However, there is still room for optimization in the structure and performance of batteries.

[0052] The battery mainly includes a box and at least one battery cell. All battery cells are placed in the box and bonded to the box by glue to improve the stability of the battery cells in the box and prevent the battery cells from shaking violently in the box. The combination of all battery cells in the box can be called a cell module, that is, a cell module includes at least one battery cell.

[0053] In the related art, the gap between the single module and the box is completely filled with glue, and a large amount of glue is used. However, in fact, the single module only needs to be bonded to the box at one or several positions in a certain direction to meet the requirements of installation stability. This leads to the phenomenon of glue waste in the method of full glue filling. Since glue is generally expensive, the waste of glue will cause unnecessary increase in battery cost.

[0054] Based on the above findings, the present application provides a battery, an electrical device and a method for manufacturing a battery to optimize the structure of the battery and improve the performance of the battery.

[0055] Figure 1-Figure 7An electrical device, a battery and a method for manufacturing the same in some embodiments of the present application are shown.

[0056] Next, combine Figure 1-Figure 7 This application is described.

[0057] Figure 1 The structure of the electric device 100 is shown as an example.

[0058] Reference Figure 1 The electrical device 100 is a device that uses a battery 10 as a power source, and includes a body 20 and a battery 10 . The battery 10 is disposed on the body 20 and provides electrical energy for the body 20 .

[0059] The electric device 100 may be a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, or other electric devices. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy. The spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, or the like.

[0060] The electric device 100 includes a power source, which includes a battery 10, and the battery 10 provides driving force for the electric device 100. In some embodiments, the driving force of the electric device 100 is all electrical energy, in which case the power source only includes the battery 10. In other embodiments, the driving force of the electric device 100 includes electrical energy and other energy sources (such as mechanical energy), in which case the power source includes the battery 10 and other equipment such as an engine.

[0061] Take the case where the electric device 100 is a vehicle 101 as an example. Figure 1 In some embodiments, the power-consuming device 100 is a new energy vehicle such as a pure electric vehicle, a hybrid electric vehicle or an extended-range vehicle, which includes a battery 10, a controller 102 and a power device 103 such as a motor 104. The battery 10 is electrically connected to the power device 103 such as the motor 104 through the controller 102, so that the battery 10 can supply power to the power device 103 such as the motor 104 under the control of the controller 102.

[0062] It can be seen that the battery 10 is an important component of the electrical device 100 .

[0063] Figure 2 The structure of the battery 10 is shown as an example.

[0064] See also Figure 2, the battery 10 includes a box 2 and a single cell module 30. A chamber 24 is provided inside the box 2. The single cell module 30 is arranged in the chamber 24 to realize the arrangement of the single cell module 30 in the box 2, so that the box 2 can accommodate and protect the single cell module 30. The single cell module 30 includes at least one battery cell 1, that is, the number of battery cells 1 in the single cell module 30 can be one, two or more. When the single cell module 30 includes at least two battery cells 1, the battery 10 can provide more electrical energy. In order to facilitate the single cell module 30 to be placed in the box 2, there is a gap 4 between the single cell module 30 and the inner wall of the box 2.

[0065] Among them, see Figure 2 The box 2 includes a sleeve 21 and two covers 22. The sleeve 21 is hollow inside, and both ends opposite to each other along the first direction Z are open. The two covers 22 are respectively arranged at the opposite ends of the sleeve 21 along the first direction Z, and the opposite ends of the sleeve 21 along the first direction Z are sealed, so that a closed chamber 24 is formed inside the box 2 to accommodate the monomer module 30. It should be noted that Figure 2 Only one cover 22 is shown in FIG. 1 , and the other cover 22 is omitted.

[0066] At least one of the two covers 22 is detachably connected to the sleeve 21. When in use, the structural components such as the battery cell 1 located inside the box 2 are disassembled and maintained by opening and closing the detachably connected cover 22. For example, in some embodiments, of the two covers 22, one cover 22 is non-detachably connected to the sleeve 21 by means of integral molding or the like, and the other cover 22 is detachably connected to the sleeve 21, and when applied to an electric device 100 such as a two-wheeled electric vehicle or an electric vehicle, the first direction Z is along the up-down direction, the non-detachably connected cover 22 is at the bottom, and the detachably connected cover 22 is at the top, so that the non-detachably connected cover 22 becomes the bottom plate, and the detachably connected cover 22 becomes the top cover, and when in use, the battery cell 1 can be disassembled and maintained by opening the detachably connected cover 22. It can be understood that "up" here refers to the direction opposite to gravity, and "down" refers to the direction in the same direction as gravity.

[0067] The shape of the sleeve 21 can be varied. As an example, see Figure 2 The sleeve 21 includes two side plates 25 and two end plates 26 connected to each other. The two side plates 25 are arranged opposite to each other along the second direction X, and the two end plates 26 are arranged opposite to each other along the third direction Y. The second direction X and the third direction Y are perpendicular to each other and are perpendicular to the first direction Z. Specifically, Figure 2As shown, in some embodiments, the thickness of the end plate 26 is greater than the thickness of the side plate 25. The two side plates 25 and the two end plates 26 are rectangular plates, and the four are connected end to end in sequence, so that the sleeve 21 is a cube. Among them, the first direction Z can be called the height direction of the sleeve 21, the box 2 and the battery 10; the second direction X can be called the width direction of the sleeve 21, the box 2 and the battery 10; the third direction Y can be called the length direction of the sleeve 21, the box 2 and the battery 10. The dimension in the first direction Z can be called the height.

[0068] The battery cell 1 accommodated in the box 2 is the smallest battery unit for providing electric energy, and is a core component of the power-consuming device 100 and the battery 10. The battery cell 1 can be various types of battery cells such as lithium-ion batteries.

[0069] Figure 3 The structure of a battery cell 1 is shown by way of example.

[0070] Reference Figure 3 The battery cell 1 includes a housing 12 , an electrode assembly 11 , a transition piece 15 , an electrode terminal 16 and an isolation piece 18 .

[0071] The housing 12 is used to accommodate the electrode assembly 11, etc., to provide protection for the electrode assembly 11, etc. The housing 12 includes a shell 13 and an end cap 14. The end cap 14 covers the end opening of the shell 13, so that a closed space for accommodating the electrode assembly 11, etc. is formed inside the housing 12.

[0072] The electrode assembly 11 is used to generate electric energy. It is arranged inside the housing 12 and is formed by stacking or winding a first electrode sheet, a second electrode sheet, and an insulating spacer between the first electrode sheet and the second electrode sheet. It provides electric energy by electrochemically reacting with the electrolyte injected into the housing 12. One of the first electrode sheet and the second electrode sheet is a positive electrode sheet, and the other is a negative electrode sheet, and both have a coating portion coated with an active material and a pole ear 17 extending outward from the coating portion and not coated with the active material. The electric energy generated by the electrode assembly 11 is transmitted outward through the pole ear 17. Among them, the pole ear 17 corresponding to the positive electrode sheet is called a positive pole ear, and the pole ear 17 corresponding to the negative electrode sheet is called a negative pole ear. The positive pole ear extends from the coating portion of the positive electrode sheet, and the negative pole ear extends from the coating portion of the negative electrode sheet. In some cases, such as in some square battery cells, the positive pole ear and the negative pole ear are located at the same end of the electrode assembly 11. In other cases, such as in some cylindrical battery cells, the positive pole ear and the negative pole ear are located at opposite ends of the electrode assembly 11.

[0073] According to actual use requirements, the number of electrode assemblies 11 in the battery cell 1 can be one, two, or more.

[0074] The adapter 15 is disposed in the housing 12 and is located between the electrode lug 17 of the electrode assembly 11 and the electrode terminal 16, and is used to realize the electrical connection between the electrode assembly 11 and the electrode terminal 16, so as to transfer the electric energy generated by the electrode assembly 11 to the electrode terminal 16. Among them, the adapter 15 corresponding to the positive lug is called a positive adapter, and the adapter 15 corresponding to the negative lug is called a negative adapter.

[0075] The electrode terminal 16 is electrically connected to the electrode assembly 11 through the adapter 15 and is used to connect to an external circuit to transfer the electric energy generated by the electrode assembly 11 to the outside of the battery cell 1. The electrode terminal 16 corresponding to the positive electrode ear is called the positive terminal, and the electrode terminal 16 corresponding to the negative electrode ear is called the negative terminal.

[0076] The separator 18 is disposed in the outer shell 12 and is located between the electrode assembly 11 and the shell 13 , and is used to insulate the electrode assembly 11 from the shell 13 to prevent a short circuit between the electrode assembly 11 and the shell 13 .

[0077] The battery cell 1 can be in various shapes such as square or cylindrical. Figure 2-3 The battery cell 1 is in a cubic shape and has a maximum surface 19. The electrode terminal 16 is disposed on a surface of the battery cell 1 adjacent to the maximum surface 19. Figure 2-3 It can be seen that in some embodiments, when placed in the box 2, the largest surface 19 of the battery cell 1 faces the end plate 26 and is perpendicular to the third direction Y and the side plate 25. It is not difficult to understand that the largest surface 19 is the surface with the largest surface area of ​​the battery cell 1. Figure 2 As shown, the largest surface of the battery cell 1 faces the end plate 26 , and the electrode terminal 16 is placed along the first direction Z, which can be called a vertical arrangement of the battery cell 1 .

[0078] In order to achieve a stable arrangement of the battery cells 1 in the box 2, the battery cells 1 and the box 2 are usually bonded by glue. Specifically, after the cell module 30 is placed in the box 2, glue is poured into the gap 4 between the cell module 30 and the box 2 to bond the cell module 30 to the inner wall of the box 2, so that the battery cells 1 in the cell module 30 can be stably arranged in the box 2 without shaking at will.

[0079] As mentioned above, in the related art, a method of full glue pouring is adopted to pour glue into the gap 4, that is, the entire gap 4 is poured with glue, and the glue fills the entire gap 4. However, since the battery cell 1 only needs to be bonded to the box 2 at several spaced positions to meet the requirements of setting stability, this method of full glue pouring has the phenomenon of large amount of glue used and waste of glue.

[0080] Here, the battery cell 1 is Figure 2As shown, the case where the battery 1 is placed in a box 2 in a vertical arrangement is used as an example for explanation. In the related art, the glue fills the entire gap 4 along the first direction Z, but in fact, the battery cell 1 only needs to be bonded at one, two or more positions in the first direction Z to meet the stability requirements of the battery cell 1. This means that when the glue fills the entire gap 4 along the first direction Z, except for the required bonding positions, the glue at other positions in the first direction Z is not necessary, which will lead to waste of glue and increase costs.

[0081] In view of the above situation, the present application improves the structure of the battery 10.

[0082] See also Figure 4-6 In the embodiment of the present application, the battery 10 not only includes a box 2 and a single cell module 30 arranged in the chamber 24 of the box 2, but also includes a filler 3 arranged in the gap 4 between the single cell module 30 and the inner wall of the box 2, and the filler 3 includes a glue layer 31 and a filling layer 32, the filling layer 32 is a non-glue material, and is arranged in a stacked manner with the glue layer 31.

[0083] Based on the above configuration, the filler 3 in the gap 4 between the monomer module 30 and the inner wall of the box 2 is no longer entirely glue, but has both a glue layer 31 of glue and a filling layer 32 of non-glue. In this case, on the one hand, the bonding area required to ensure the stability of the monomer module 30 can still be filled with the glue layer 31 of glue, so that the battery cell 1 and the box 2 are reliably bonded. On the other hand, the non-essential bonding area can no longer be filled with glue, but can be filled with the filling layer 32 of non-glue. Therefore, under the premise of ensuring the effective bonding area and achieving the stable setting of the monomer module 30, the amount of glue can be saved, the waste of glue can be reduced, and the cost of the battery 10 can be reduced. It can be understood that the effective bonding area is the sum of the bonding areas of the bonding areas required to ensure the stability of the monomer module 30 and its battery cell 1, that is, the minimum total bonding area to prevent the monomer module 30 and its battery cell 1 from shaking in the box 2.

[0084] At the same time, the filler 3 is designed to include a stacked glue layer 31 and a filling layer 32, which is not only conducive to reducing the amount of glue liquid used, but also from another perspective, it is also conducive to increasing the gap 4, thereby reducing the difficulty of entering the box of the single module 30. Because, when the filler 3 is no longer entirely glue liquid, but includes a stacked glue layer 31 and a filling layer 32, the same amount of glue liquid can meet the filling requirements of a larger gap 4, so that the gap 4 can be increased without increasing the amount of glue used. Since the single module 30 is easier to enter the box 2 when the gap 4 is increased, the difficulty of entering the box of the single module 30 can be effectively reduced, which is conducive to improving the manufacturing efficiency of the battery 10.

[0085] In addition, when the filler 3 includes a stacked adhesive layer 31 and a filling layer 32, the position of the adhesive layer 31 can be precisely controlled by precisely controlling the ratio of the adhesive layer 31 to the filling layer 32, which not only facilitates the control of the adhesive layer 31 to be distributed only in the required bonding area, but also facilitates and more effectively improves the strength of the battery 10. Since the stress conditions of the battery cell 1 are different at different positions, precisely controlling the position of the adhesive layer 31 can more accurately meet the bonding requirements of different positions, thereby facilitating obtaining better strength performance.

[0086] The stacking direction of the filling layer 32 and the adhesive layer 31 can be along the first direction Z, the second direction X or the third direction Y. As an example, see Figure 4-6 The stacking direction of the filling layer 32 and the glue layer 31 is along the first direction Z.

[0087] As mentioned above, when applied to the electrical device 100, the first direction Z is usually the up and down direction. In this case, the filling layer 32 and the glue layer 31 are stacked along the first direction Z, which means that the filling layer 32 and the glue layer 31 are stacked along the up and down direction. Since at this time, the stacking direction of the filling layer 32 and the glue layer 31 is consistent with the gravity direction, it is only necessary to pour the filling layer 32 and the glue layer 31 in sections during pouring, and the filling layer 32 and the glue layer 31 can be naturally maintained in the desired position and separated from each other. There is no need to set up other partitions to separate the filling layer 32 and the glue layer 31, nor is there any need to adopt other measures to keep the filling layer 32 and the glue layer 31 in the desired position. Therefore, the structure and operation are relatively simple, and it is also convenient to more accurately control the position of the glue layer 31, so that the glue layer 31 can more accurately bond the battery cell 1 and the box 2 in the required bonding area to obtain better strength performance.

[0088] When the box 2 includes a sleeve 21 and two covers 22, the gap 4 where the filler 3 is located can be the gap 4 between the single cell module 30 and the sleeve 21, or the gap 4 between the single cell module 30 and the cover 22. When the filler 3 is located in the gap 4 between the battery cell 1 and the sleeve 21, filling is more convenient and the bonding effect is better.

[0089] As an example of a filler 3 being located in the gap 4 between the cell module 30 and the sleeve 21, see Figure 2, the filler 3 is arranged in the gap 4 between the monomer module 30 and the side plate 25 of the sleeve 21. As mentioned above, compared with the end plate 26, the thickness of the side plate 25 is thinner, so the gap between the side plate 25 and the monomer module 30 is relatively large, which is more convenient to fill the filler 3 and is more conducive to improving the overall strength of the battery 10. In particular, when the maximum surface 19 of the battery cell 1 faces the end plate 26 and the side plate 25 is perpendicular to the maximum surface 19, when the filler 3 is arranged in the gap 4 between the monomer module 30 and the side plate 25, compared with the case where the filler 3 is arranged in the gap 4 between the monomer module 30 and the end plate 26, under the condition of the same height in the first direction Z, the bonding area of ​​the adhesive layer 31 is larger, so it is conducive to achieving a stronger bonding between the monomer module 30 and the box 2.

[0090] See also Figure 4-6 In some embodiments, the filling layer 32 and the glue layer 31 are alternately stacked, that is, the filling layer 32 and the glue layer 31 are stacked in the stacking direction, one glue layer 31, one filling layer 32, another glue layer 31, and another filling layer 32, and stacked repeatedly, so that the filler 3 becomes a multi-layer filling structure of at least three layers, and any filling layer 32 is located between two adjacent glue layers 31. This alternate filling method of the glue layer 31 and the filling layer 32 enables the glue layer 31 to be provided at two or more sequentially spaced positions in the stacking direction, so that each glue layer 31 can bond the battery cell 1 at different positions in the stacking direction, which is convenient for achieving a relatively stable and firm overall bonding effect.

[0091] See also Figure 2-6 In some embodiments, in the stacking direction of the adhesive layer 31 and the filling layer 32, the size of the filler 3 is equal to the size of the chamber 24, that is, the filler 3 fills the gap 4 in the stacking direction of the filling layer 32 and the adhesive layer 31. At this time, all positions of the gap 4 along the stacking direction are filled with the filler 3, and there is no situation where there is filler 3 in one area and no filler 3 in another area. Therefore, the overall structure is relatively flat, and the single module 30 will not be skewed because a certain area in the stacking direction is not filled with filler 3, so it is beneficial to further improve the stability of the single module 30 in the box 2.

[0092] During the specific filling, the filling ratio of the adhesive layer 31 and the filling layer 32 can be designed according to the actual situation (such as the overall size of the chamber 24 in the stacking direction and the effective bonding area requirement).

[0093] For example, in some embodiments, the dimensions of the adhesive layer 31 and the filling layer 32 in the stacking direction each account for at least 5% of the dimensions of the chamber 24 in the stacking direction. In this way, the proportion of each adhesive layer 31 and each filling layer 32 will not be too small, which is not only convenient for meeting the requirements of the effective bonding area, but also can prevent the difficulty of filling control of each adhesive layer 31 or each filling layer 32 from increasing due to too small a proportion. If the proportion is too small, it is easy to cause overfilling, that is, if the proportion is too small, in the process of filling a certain layer, it is easy to overfill, exceeding the required filling area, affecting the overall filling effect, and even affecting the bonding strength.

[0094] For another example, in some embodiments, the size of the adhesive layer 31 in the stacking direction is 10 to 30 mm. At this time, the proportion of each adhesive layer 31 is relatively appropriate, which is convenient for reducing the amount of glue, reducing the number of glue injections, and reducing the difficulty of glue injection while meeting the effective bonding area requirements.

[0095] For example, in some embodiments, the size of the filling layer 32 in the stacking direction is 3-10 mm. In this case, the proportion of each filling layer 32 is relatively small, which is convenient for reducing the amount of glue while meeting the effective bonding area requirements and achieving effective separation of different glue layers 31.

[0096] In the aforementioned embodiments, the material and shape of the filling layer 32 can be varied.

[0097] For example, in some embodiments, the density of the filling layer 32 is less than that of the glue layer 31. In this way, under the same volume, the filling layer 32 is lighter than the glue layer 31. Therefore, using the lighter filling layer 32 to replace the glue in the corresponding area is beneficial to reducing the overall weight of the battery 10 and improving the energy density of the battery 10.

[0098] For example, see Figure 6 In some embodiments, the filling layer 32 is a particle layer 33. In this case, the filling layer 32 includes many small particles stacked together. Since there are gaps between adjacent particles, there is no solid material in the corresponding gaps, but it is filled with air. Therefore, compared with the case where the filling layer 32 is a non-particle layer, it is beneficial to reduce weight and improve the energy density of the battery 10.

[0099] As an example of the filling layer 32, the filling layer 32 includes foam, silica gel particles or polymer organic particles. In this case, the filling layer 32 is a particle layer 33 (which can be called a lightweight particle layer) with a density less than that of the glue, which can reduce weight not only from the material perspective, but also from the perspective of the shape of the filling layer 32. That is to say, at this time, the weight can be reduced from both the material and the shape of the filling layer 32, so the energy density of the battery 10 can be more effectively improved.

[0100] Next, Figure 2-6 The illustrated embodiment is further described.

[0101] like Figure 2-6 As shown, in this embodiment, the box 2 of the battery 10 is in a cubic shape, and its sleeve 21 is formed by two end plates 26 and two side plates 25 connected end to end in sequence to form a hollow cubic shape, and its two covers 22 are connected to the opposite ends of the sleeve 21 along the first direction Z, wherein one cover 22 is an integral structure with the sleeve 21 and becomes a bottom plate, and the other cover 22 is detachably connected to the sleeve 21 and becomes a top cover. The two covers 22 block the opposite ends of the sleeve 21 along the first direction Z, so that a chamber 24 for accommodating the monomer module 30 is formed inside the box 2.

[0102] like Figure 2 As shown, in this embodiment, the cell module 30 includes a plurality of battery cells 1 arranged in a matrix. All battery cells 1 are in a cubic shape and are arranged vertically in the box 2. Specifically, the largest surface 19 of the battery cell 1 faces the end plate 26 of the box 2, perpendicular to the side plate 25, and the electrode terminals 16 of the battery cell 1 are all located on the surface of the battery cell 1 facing the cover 22 (i.e., the top cover) detachably connected to the sleeve 21, that is, the electrode terminals 16 of the battery cell 1 are all located on the surface of the battery cell 1 adjacent to the largest surface 19.

[0103] like Figure 2 As shown, in this embodiment, a gap 4 is provided between the monomer module 30 and the two side plates 25 to facilitate the monomer module 30 to be placed in the box 2. Before being placed in the box 2, the monomer module 30 may be pressed first so that the battery cells 1 of the monomer module 30 can be arranged relatively closely together.

[0104] And, if Figure 2 As shown, in this embodiment, fillers 3 are provided in the gaps 4 between the single cell module 30 and the two side plates 25, so that the battery 10 includes two fillers 3, and the two fillers 3 are arranged at intervals along the third direction Y. The fillers 3 are insulated as a whole to insulate the single cell module 30 and the box 2 to prevent a short circuit between the single cell module 30 and the box 2.

[0105] The structures of the two fillers 3 are the same, which can simplify the overall structure of the battery 10.

[0106] Figure 6 The structure of the filler 3 is further shown. Figure 6 As shown, in this embodiment, the filler 3 fills the gap 4, and its height is equal to the height of the gap 4. As mentioned above, the height refers to the dimension in the first direction Z. And, as Figure 6As shown, in this embodiment, the filler 3 is a five-layer filling structure, which includes three adhesive layers 31 and two filling layers 32, and the three adhesive layers 31 and the two filling layers 32 are alternately stacked in the first direction Z, so that the three adhesive layers 31 are arranged at intervals in the first direction Z, and a filling layer 32 is provided between any two adjacent adhesive layers 31, forming a sandwich structure. Figure 6 In the above and below are above and below, then Figure 6 It can be seen that in this embodiment, from bottom to top, the layers of the filler 3 are adhesive layer 31 -filling layer 32 - adhesive layer 31 -filling layer 32 - adhesive layer 31 in sequence. Figure 6 The up and down directions are along the first direction Z, wherein the direction from the bottom plate (i.e., a cover 22 that is non-detachably connected to the sleeve 21) to the top cover (i.e., a cover 22 that is detachably connected to the sleeve 21) is upward, which is opposite to the direction of gravity, and the direction from the top cover to the bottom plate is downward, which is the same as the direction of gravity.

[0107] Among them, each filling layer 32 is a particle layer 33 composed of silica gel particles. Silica gel particles are not glue liquid, they are granular, have a lower density than glue liquid, are insulating, flame retardant, and are relatively soft. Therefore, the filling layer 32 composed of silica gel particles is a lightweight and insulating non-glue particle layer, which is not only not glue liquid, but also has a lighter weight, a softer hardness, and is insulating and flame retardant.

[0108] When manufacturing the battery 10, after the monomer module 30 is pressed into the box, the gap 4 can be alternately injected with glue and silicone particles. The injection can be implemented by a glue coating head and is performed three times to form three layers of glue 31, and the height of a single injection is controlled at 10 to 30 mm, so that the height of each glue layer 31 is 10 to 30 mm. Between two adjacent injection operations, silicone particles are filled to form two filling layers 32, and the height of a single filling is controlled at 3 to 10 mm, so that the height of each filling layer 32 is 3 to 10 mm. In this way, Figure 6 The filler 3 shown is a five-layer filling structure.

[0109] Among them, the sum of the bonding areas of the three layers of adhesive 31 meets the effective bonding area requirements of the single module 30, and the three layers of adhesive 31 respectively bond the single module 30 and the box 2 in the upper, middle and lower three parts of the first direction Z. Therefore, the bonding strength is high and the bonding stability is high, so that the single module 30 can be stably set in the box 2.

[0110] Among the three adhesive layers 31, any two adjacent adhesive layers 31 are separated by a filling layer 32. Since the filling layer 32 is not an adhesive layer, it can be used to replace the original adhesive between any two adjacent adhesive layers 31, which can effectively reduce the amount of adhesive used. Moreover, since the filling layer 32 is a lightweight particle layer, it can also reduce the overall weight of the battery 10 and improve the energy density of the battery 10.

[0111] It can be seen that this embodiment can reduce the overall weight of the battery 10 and improve the energy density of the battery 10 while effectively reducing the amount of glue used.

[0112] In addition, by controlling the filling ratio of the glue layer 31 and the filling layer 32, the position of the glue layer 31 in the first direction Z can be controlled more accurately, thereby achieving a more accurate gluing process. This can not only further reduce glue waste, but also facilitate more accurate meeting of gluing requirements at different height positions, thereby obtaining better strength performance.

[0113] It can be seen that, compared with the related art, the structure of the battery 10 of this embodiment is optimized and the performance is improved.

[0114] Also, see Figure 7 The present application also provides a method for manufacturing a battery 10, which comprises:

[0115] S100, placing a cell module 30 including at least one battery cell 1 into a box 2; and

[0116] S200 , filling the gap 4 between the single module 30 and the inner wall of the box 2 with a glue layer 31 , and filling the gap 4 with a filling layer 32 of a non-glue material, so that the filling layer 32 and the glue layer 31 are stacked.

[0117] Based on steps S100 and S200, the gap 4 between the single module 30 and the box 2 is no longer entirely filled with glue, thereby effectively reducing the amount of glue used and preventing glue waste.

[0118] In some embodiments, when the glue layer 31 and the filling layer 32 are filled into the gap 4 , the glue layer 31 and the filling layer 32 are filled alternately.

[0119] By alternately filling the adhesive layer 31 and the filling layer 32, alternately stacked adhesive layers 31 and filling layers 32 can be obtained, which makes it easier to achieve gluing at least two positions spaced apart from each other, thereby facilitating better bonding effects.

[0120] The above description is only an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery (10), characterized in that: include: A box (2) having a chamber (24) therein; a cell module (30) disposed in the chamber (24) and comprising at least one battery cell (1); and A filler (3) is arranged in a gap (4) between the single module (30) and the inner wall of the box (2), and comprises a glue layer (31) and a filling layer (32), wherein the filling layer (32) is a non-glue material and is arranged in a stacked manner with the glue layer (31); The filler (3) is constructed as at least one of the following: The filling layer (32) and the adhesive layer (31) are alternately stacked; In the stacking direction of the adhesive layer (31) and the filling layer (32), the size of the filler (3) is equal to the size of the chamber (24); The dimensions of the adhesive layer (31) and the filling layer (32) in the stacking direction each account for at least 5% of the dimension of the chamber (24) in the stacking direction; The size of the adhesive layer (31) in the stacking direction is 10 to 30 mm; The size of the filling layer (32) in the stacking direction is 3 to 10 mm.

2. The battery (10) according to claim 1, characterized in that: The filling layer (32) is constructed as at least one of the following: The density of the filling layer (32) is lower than that of the adhesive layer (31); The filling layer (32) is a particle layer (33); The filling layer (32) comprises foam, silica gel particles or macromolecular organic particles.

3. The battery (10) according to claim 1 or 2, characterized in that: The box (2) comprises a sleeve (21) and two covers (22), wherein the two covers (22) are arranged at opposite ends of the sleeve (21) along a first direction (Z), at least one of the two covers (22) is detachably connected to the sleeve (21), and the stacking direction of the filling layer (32) and the adhesive layer (31) is along the first direction (Z).

4. The battery (10) according to claim 3, characterized in that The filler (3) is arranged in a gap (4) between the single module (30) and the sleeve (21).

5. The battery (10) according to claim 4, characterized in that The sleeve (21) comprises two side plates (25) and two end plates (26) connected to each other, the two side plates (25) are arranged relative to each other along a second direction (X), and the two end plates (26) are arranged relative to each other along a third direction (Y), the second direction (X) and the third direction (Y) are perpendicular to each other and are perpendicular to the first direction (Z), and the filler (3) is arranged in a gap (4) between the single module (30) and the side plates (25).

6. The battery (10) according to claim 5, characterized in that The side plate (25) is perpendicular to the largest surface (19) of the battery cell (1).

7. An electrical device (100), comprising a body (20), characterized in that: It also comprises a battery (10) as claimed in any one of claims 1 to 6, wherein the battery (10) is arranged on the body (20) and provides electrical energy for the body (20).

8. A method for manufacturing a battery (10), characterized in that: include: placing a cell module (30) including at least one battery cell (1) into a box (2); and Filling a glue layer (31) in the gap (4) between the single module (30) and the inner wall of the box (2), and filling the gap (4) with a filling layer (32) of a non-glue material, so that the filling layer (32) and the glue layer (31) are stacked; The filler (3) is constructed as at least one of the following: The filling layer (32) and the adhesive layer (31) are alternately stacked; In the stacking direction of the adhesive layer (31) and the filling layer (32), the size of the filler (3) is equal to the size of the cavity (24); The dimensions of the adhesive layer (31) and the filling layer (32) in the stacking direction each account for at least 5% of the dimension of the chamber (24) in the stacking direction; The size of the adhesive layer (31) in the stacking direction is 10 to 30 mm; The size of the filling layer (32) in the stacking direction is 3 to 10 mm.

9. The manufacturing method according to claim 8, characterized in that: When the glue layer (31) and the filling layer (32) are filled into the gap (4), the glue layer (31) and the filling layer (32) are filled alternately.

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