CN115810847A - Battery, electric device, and method for manufacturing battery - Google Patents

Abstract

The present disclosure relates to battery technologies, and particularly to a battery, an electric device, and a method for manufacturing the battery. The battery includes: a box, inside which a chamber is arranged; the single module is arranged in the cavity and comprises at least one battery single body; and the filler is arranged in a gap between the monomer module and the inner wall of the box and comprises an adhesive layer and a filling layer, and the filling layer is a non-adhesive substance and is arranged in a laminated manner with the adhesive layer. Based on this, can effectively reduce the rubber coating quantity, realize the optimization to battery structure.

Description

Battery, electric device, and method for manufacturing battery

Technical Field

The present disclosure relates to battery technologies, and particularly to a battery, an electric device, and a method for manufacturing the battery.

Background

At present, batteries are increasingly used. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles and electric automobiles, and a plurality of fields such as military equipment and aerospace. However, the structure of the battery remains to be optimized.

Disclosure of Invention

One technical problem to be solved by the present application is: the structure of the battery is optimized.

In order to solve the above technical problem, a first aspect of the present application provides a battery, including:

a box, inside which a chamber is arranged;

the single module is arranged in the cavity and comprises at least one battery single body; and

the filler is arranged in a gap between the monomer module and the inner wall of the box and comprises an adhesive layer and a filling layer, and the filling layer is a non-adhesive substance and is arranged in a laminating manner with the adhesive layer.

Based on the setting, because the clearance between monomer module and the case is no longer all for the glue solution, consequently, can effectively reduce the glue solution quantity, prevent the glue solution extravagant, realize the optimization to battery structure.

In some embodiments, the fill layer has a density less than the glue layer. Thus, under the condition of reducing the consumption of glue solution, the weight can be further reduced, and the energy density of the battery can be improved.

In some embodiments, the filler layer is a particulate layer. Thus, under the condition of reducing the consumption of glue solution, the weight can be further reduced, and the energy density of the battery can be improved.

In some embodiments, the filler layer comprises foam, silica gel particles, or polymer organic particles. The filling layer is a light particle layer, so that the weight can be reduced more effectively and the energy density of the battery can be improved under the condition of reducing the using amount of glue solution.

In some embodiments, the filler layers are alternately stacked with the glue layers. In this way, gluing at least two positions spaced apart from each other is more easily achieved, which is advantageous for obtaining a better gluing effect.

In some embodiments, the size of the filler is equal to the size of the cavity in the stacking direction of the glue layer and the filler layer. Therefore, the arrangement stability of the single modules in the box is further improved.

In some embodiments, the size of the glue layer and the fill layer in the stacking direction each account for at least 5% of the size of the cavity in the stacking direction. Like this, the occupation of ratio of every glue film and every filling layer can not be too little, not only conveniently satisfies effective bonding area's demand, and moreover, the packing degree of difficulty is lower, and the packing precision is changeed and is controlled.

In some embodiments, the size of the glue layer in the lamination direction is 10 to 30mm. Based on the method, the glue solution consumption is reduced, the glue filling times are reduced, and the glue filling difficulty is reduced on the basis of meeting the requirement of the effective bonding area

In some embodiments, the filler layer has a dimension in the stacking direction of 3 to 10mm. Based on this, the glue solution consumption is reduced on the basis of conveniently satisfying effective bonding area demand to realize the effective separation to different glue films.

In some embodiments, the case includes a sleeve and two flaps, the two flaps being disposed at opposite ends of the sleeve in the first direction, at least one of the two flaps being detachably attached to the sleeve, and the stacking direction of the filling layer and the glue layer being along the first direction. Based on this, structure and operation are all comparatively simple, also make things convenient for the position of more accurate control glue film simultaneously for the glue film can bond battery monomer and case more accurately in necessary bonding region, obtains better intensity performance.

In some embodiments, a filler is disposed in the gap between the cell module and the sleeve. At the moment, the filling is more convenient, and the bonding effect is better.

In some embodiments, the sleeve includes two side plates and two end plates connected to each other, the two side plates being oppositely disposed along the second direction, the two end plates being oppositely disposed along the third direction, the second direction and the third direction being perpendicular to each other and both being perpendicular to the first direction, the filler being disposed in a gap between the monomer module and the side plates. At this time, the filler is more conveniently filled, and the overall strength of the battery is more favorably improved.

In some embodiments, the side plates are perpendicular to the largest surface of the battery cell. Based on this, be favorable to realizing more firm bonding between monomer module and the case.

The second aspect of the present application provides an electric device, which includes a body and further includes a battery according to an embodiment of the present application, where the battery is disposed on the body and provides electric energy for the body.

Since the structure of the battery according to the embodiment of the present application is optimized, the structure of the electric device including the battery according to the embodiment of the present application is also optimized.

The third aspect of the present application also provides a method of manufacturing a battery, including:

placing a cell module comprising at least one battery cell into a case; and

and filling a glue layer in a gap between the monomer module and the inner wall of the box, and filling a non-glue filling layer in the gap to ensure that the filling layer and the glue layer are arranged in a laminated manner.

The battery manufactured by the manufacturing method has the advantage that the consumption of glue solution is reduced.

In some embodiments, the gap is filled with the glue layer and the filling layer alternately. In this way, gluing at least two positions spaced apart from each other is more easily achieved, which is advantageous for obtaining a better gluing effect.

In this application, because the clearance between battery monomer and the case inner wall is no longer all filling glue, but filling glue film and filling layer, consequently, can effectively reduce the rubber coating quantity, realize the optimization to the battery structure.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic view of a power consuming apparatus according to an embodiment of the present application.

Fig. 2 is an exploded view of a battery in the embodiment of the present application.

Fig. 3 is an exploded view of the battery cell of fig. 2.

Fig. 4 is a schematic top view of a portion of the battery shown in fig. 2.

Fig. 5 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 4.

Fig. 6 is a partially enlarged view of B of fig. 5.

Fig. 7 is a flow chart illustrating a manufacturing method in an embodiment of the present application.

Description of reference numerals:

100. an electricity-using device; 101. a vehicle; 102. a controller; 103. a power plant; 104. a motor; 10. a battery; 20. a body; 30. a monomer module;

1. a battery cell; 11. an electrode assembly; 12. a housing; 13. a housing; 14. an end cap; 15. an adapter; 16. an electrode terminal; 17. a tab; 18. a spacer; 19. a maximum surface;

2. a box; 21. a sleeve; 22. sealing the cover; 24. a chamber; 25. a side plate; 26. an end plate;

3. a filler; 31. a glue layer; 32. a filling layer; 33. a particulate layer;

4. a gap;

z, a first direction; x, a second direction; y, third direction.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present disclosure.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the description of the present application, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present application.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

With the rapid development of electric devices such as electronic products and electric vehicles, batteries are increasingly widely used, and the requirements for the performance of the batteries are continuously increased.

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

The battery mainly comprises a box and at least one battery cell. All battery monomers all set up in the case to bond through the glue solution between with the case, with the setting steadiness of improving battery monomer in the case, prevent that battery monomer from violently rocking in the case. The combination of all battery cells in the case may be referred to as a cell module, that is to say, the cell module comprises at least one battery cell.

In the correlation technique, all fill the glue solution in the clearance between monomer module and the case, it is more with the gluey volume, in fact, the monomer module only needs bond on the case in one or several positions of certain orientation, can satisfy the requirement that sets up the steadiness, and this just leads to, and there is the extravagant phenomenon of glue solution in the mode of whole encapsulating. Since the glue is generally expensive, waste of the glue may result in an unnecessary increase in the cost of the battery.

Based on the above findings, the present application provides a battery, an electric device, and a method of manufacturing the battery to optimize the structure of the battery, improve the performance of the battery,

fig. 1-7 illustrate powered devices, batteries, and methods of making the same in some embodiments of the present application.

The present application will now be described with reference to fig. 1-7.

Fig. 1 exemplarily shows a structure of a power consuming apparatus 100.

Referring to fig. 1, the electric device 100 is a device using a battery 10 as a power source, and includes a body 20 and the battery 10, and the battery 10 is disposed on the body 20 and supplies electric power to the body 20.

The electric device 100 may be a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft, or other electric devices. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like. Spacecraft may include aircraft, rockets, space shuttles, and spacecraft, among others.

The electric device 100 includes a power source including a battery 10, and the battery 10 provides a driving force for the electric device 100. In some embodiments, the driving force of the electric device 100 is electric energy, and in this case, the power source only includes the battery 10. In other embodiments, the driving force of the electric device 100 includes electric energy and other energy sources (e.g., mechanical energy), and in this case, the power source includes the battery 10 and other devices such as an engine.

The electric device 100 is exemplified as the vehicle 101. Referring to fig. 1, in some embodiments, an electric device 100 is a new energy vehicle such as a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle, and includes a battery 10, a controller 102, and a power device 103 such as a motor 104, where 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.

As can be seen, the battery 10 is an important component of the powered device 100.

Fig. 2 exemplarily shows the structure of the battery 10.

Referring to fig. 2, the battery 10 includes a case 2 and a cell module 30. The box 2 is provided with a chamber 24 inside. The cell modules 30 are disposed in the chamber 24 to enable the arrangement of the cell modules 30 in the case 2 such that the case 2 can receive and protect the cell modules 30. The cell module 30 includes at least one battery cell 1, that is, the number of battery cells 1 in the cell module 30 may be one, two, or more. When the cell module 30 includes at least two battery cells 1, the battery 10 can provide more electric power. To facilitate the placement of the monomer modules 30 into the box 2, a gap 4 exists between the monomer modules 30 and the inner wall of the box 2.

Therein, referring to fig. 2, the case 2 comprises a sleeve 21 and two lids 22. The sleeve 21 is hollow inside, and both ends opposite to each other in the first direction Z are open. The two covers 22 are respectively disposed at two opposite ends of the sleeve 21 along the first direction Z, and seal the two opposite ends of the sleeve 21 along the first direction Z, so that a closed cavity 24 is formed inside the case 2 to receive the monomer modules 30. Note that only one cover 22 is shown in fig. 2, and the other cover 22 is omitted.

At least one of the two caps 22 is detachably connected to the sleeve 21. When the battery pack is used, the detachable and connected cover 22 is opened and closed, so that the structural components inside the box 2, such as the battery cell 1, can be detached and maintained. For example, in some embodiments, one of the two covers 22 is integrally formed with the sleeve 21 to be non-detachably connected, the other cover 22 is detachably connected to the sleeve 21, and when the cover is applied to the electric device 100 such as a two-wheeled electric vehicle or an electric vehicle, the first direction Z is along the vertical direction, the non-detachably connected cover 22 is on the bottom, and the detachably connected cover 22 is on the top, so that the non-detachably connected cover 22 serves as the bottom and the detachably connected cover 22 serves as the top, and when the cover is used, the detachably connected cover 22 can be opened to perform the maintenance on the battery cell 1. It is to be understood that "up" herein refers to the direction opposite to gravity and "down" refers to the same direction as gravity.

The shape of the sleeve 21 may vary. As an example, with reference to fig. 2, the sleeve 21 comprises two side plates 25 and two end plates 26 connected to each other, the two side plates 25 being oppositely arranged along the second direction X and the two end plates 26 being oppositely arranged along the third direction Y. The second direction X and the third direction Y are perpendicular to each other and to the first direction Z. Specifically, as shown in FIG. 2, in some embodiments, the thickness of the end plates 26 is greater than the thickness of the side plates 25. The two side plates 25 and the two end plates 26 are rectangular plates, which are connected end to end in sequence, so that the sleeve 21 is cuboidal. Wherein the first direction Z may be referred to as the height direction of the sleeve 21, the case 2 and the battery 10; the second direction X may be referred to as the width direction of the sleeve 21, the case 2 and the battery 10; the third direction Y may be referred to as the length direction of the sleeve 21, the case 2 and the battery 10. The dimension in the first direction Z may be referred to as the height.

The battery cell 1 accommodated in the case 2 is the smallest unit of battery for supplying electric power, and is a core component of the electric device 100 and the battery 10. The battery cell 1 may be various battery cells such as a lithium ion battery.

Fig. 3 exemplarily shows the structure of the battery cell 1.

Referring to fig. 3, the battery cell 1 includes a case 12, an electrode assembly 11, an adaptor 15, an electrode terminal 16, and a separator 18.

The case 12 is configured to accommodate the electrode assembly 11 and the like to protect the electrode assembly 11 and the like. The housing 12 includes a housing 13 and an end cap 14. The end cap 14 covers an end opening of the case 13 so that a closed space for accommodating the electrode assembly 11 and the like is formed inside the case 12.

The electrode assembly 11 for generating electric power is disposed inside the case 12, and is formed by stacking or winding a first pole piece, a second pole piece, and an insulating separator between the first and second pole pieces, and supplies electric power through electrochemical reaction with an electrolyte injected into the case 12. One of the first and second pole pieces is a positive pole piece, and the other is a negative pole piece, and both have a coating portion coated with an active material and a tab 17 extended outward from the coating portion without being coated with the active material. The electric energy generated by the electrode assembly 11 is transmitted to the outside through the tabs 17. The tab 17 corresponding to the positive electrode sheet is called a positive electrode tab, and the tab 17 corresponding to the negative electrode sheet is called a negative electrode tab. The positive tab extends from the coating portion of the positive plate, and the negative tab extends from the coating portion of the negative plate. In some cases, such as in some prismatic cells, the positive and negative tabs are located at the same end of the electrode assembly 11. In other cases, such as in some cylindrical cells, the positive and negative electrode tabs are located at opposite ends of the electrode assembly 11.

The number of the electrode assemblies 11 in the battery cell 1 may be one, two, or more according to actual use requirements.

The adaptor 15 is disposed in the case 12 between the tab 17 of the electrode assembly 11 and the electrode terminal 16 for electrical connection between the electrode assembly 11 and the electrode terminal 16 to transfer electrical energy generated by the electrode assembly 11 to the electrode terminal 16. The adaptor 15 corresponding to the positive tab is referred to as a positive adaptor, and the adaptor 15 corresponding to the negative tab is referred to as a negative adaptor.

The electrode terminal 16 is electrically connected to the electrode assembly 11 through the adaptor 15 and is used to be connected to an external circuit to transmit electric power generated from the electrode assembly 11 to the outside of the battery cell 1. Here, the electrode terminal 16 corresponding to the positive tab is referred to as a positive terminal, and the electrode terminal 16 corresponding to the negative tab is referred to as a negative terminal.

A separator 18 is disposed in the case 12 between the electrode assembly 11 and the case 13 for insulating the electrode assembly 11 from the case 13 to prevent a short circuit between the electrode assembly 11 and the case 13.

The battery cell 1 may have various shapes such as a square shape or a cylindrical shape as a whole. Illustratively, referring to fig. 2-3, the battery cell 1 has a cubic shape having a maximum surface 19, and the electrode terminal 16 is disposed on a surface of the battery cell 1 adjacent to the maximum surface 19. Also, as can be seen in fig. 2-3, in some embodiments, when placed in the case 2, the largest surface 19 of the battery cell 1 faces the end plate 26, perpendicular to the third direction Y and the side plate 25. It will be understood that the maximum surface 19 is the surface of the battery cell 1 having the greatest surface area. Such a placement in which the largest surface of the battery cell 1 faces the end plate 26 and the electrode terminals 16 extend in the first direction Z as shown in fig. 2 may be referred to as a vertical arrangement of the battery cells 1.

In order to achieve a stable arrangement of the battery cell 1 in the case 2, the battery cell 1 and the case 2 are usually bonded together by glue. Particularly, after monomer module 30 was put into case 2, pour into the glue solution in the clearance 4 between monomer module 30 and the case 2, bond monomer module 30 in the inner wall of case 2 for the battery monomer 1 in monomer module 30 can stabilize the setting in case 2, can not rock at will.

As described above, in the related art, the glue solution is filled into the gap 4 in a full glue filling manner, that is, the entire gap 4 is filled with the glue solution, and the glue solution fills the entire gap 4, but the battery cell 1 only needs to be bonded to the case 2 at a plurality of spaced positions, so that the requirement for setting stability can be met, and therefore, the glue solution is used in a large amount and the glue solution is wasted in the full glue filling manner.

Here, a case where the battery cells 1 are placed in the case 2 in a vertical arrangement as shown in fig. 2 will be described as an example. In the related art, the glue solution fills the whole gap 4 along the first direction Z, but actually, the single battery 1 only needs to be bonded at one, two or more positions in the first direction Z, so as to meet the requirement of setting stability of the single battery 1, which means that when the glue solution fills the whole gap 4 along the first direction Z, the glue solutions at other positions in the first direction Z are unnecessary except for the required bonding position, which may cause waste of the glue solution and increase of the cost.

In view of the above, the present application improves the structure of the battery 10.

Referring to fig. 4 to 6, in the embodiment of the present application, the battery 10 includes not only the case 2 and the cell module 30 disposed in the cavity 24 of the case 2, but also the filler 3 disposed in the gap 4 between the cell module 30 and the inner wall of the case 2, and the filler 3 includes a glue layer 31 and a filling layer 32, and the filling layer 32 is a non-glue substance and is disposed in a laminated manner with the glue layer 31.

Based on the above arrangement, the filler 3 in the gap 4 between the monomer module 30 and the inner wall of the box 2 is not all glue solution, but has the glue layer 31 which is glue solution and the filling layer 32 which is not glue solution. In this case, on one hand, the bonding area necessary for ensuring the stability of the monomer module 30 can be filled with the glue layer 31 of the glue solution to reliably bond the battery monomer 1 and the case 2, and on the other hand, the originally unnecessary bonding area can be filled with the glue solution instead of the filling layer 32 of the glue solution, so that the glue solution consumption can be saved, the waste of the glue solution can be reduced, and the cost of the battery 10 can be reduced on the premise of ensuring the effective bonding area and realizing the stable setting of the monomer module 30. It can be understood that the effective bonding area is the total bonding area of the bonding areas necessary to ensure the stability of the arrangement of the cell modules 30 and the battery cells 1 thereof, i.e. the minimum total bonding area to prevent the cell modules 30 and the battery cells 1 thereof from shaking in the case 2.

Meanwhile, the filler 3 is designed to comprise the glue layer 31 and the filling layer 32 which are arranged in a stacked mode, so that the glue solution consumption is reduced, the gap 4 is increased from another angle, and the difficulty of the monomer module 30 in box entering is reduced. Because, when filler 3 is no longer all the glue solution, but including glue film 31 and the filling layer 32 of range upon range of arrangement, the packing demand of bigger clearance 4 can be satisfied to equivalent glue solution for clearance 4 can be increased under the condition that does not increase with the volume of gluing, because when clearance 4 increases, monomer module 30 gets into case 2 more easily, consequently, can effectively reduce the case degree of difficulty of entering of monomer module 30, this is favorable to improving battery 10's manufacturing efficiency.

In addition, under the condition that the filler 3 comprises the glue layer 31 and the filling layer 32 which are arranged in a stacked mode, the accurate control of the position of the glue layer 31 can be achieved by accurately controlling the proportion of the glue layer 31 to the filling layer 32, the glue layer 31 is conveniently controlled to be only distributed in an essential bonding area, and the strength of the battery 10 is conveniently and effectively improved. Because different positions, the atress condition of battery monomer 1 is different, consequently, the position of accurate control glue film 31 can satisfy the bonding demand of different positions more accurately, consequently, is convenient for obtain better intensity performance.

The stacking direction of the filling layer 32 and the glue layer 31 may be along the first direction Z, the second direction X, or the third direction Y. As an example, referring to fig. 4 to 6, the lamination direction of the filling layer 32 and the glue layer 31 is along the first direction Z.

As mentioned above, when the electric device 100 is applied, the first direction Z is generally the up-down direction, in this case, the filling layer 32 and the glue layer 31 are stacked along the first direction Z, that is, the filling layer 32 and the glue layer 31 are stacked along the up-down direction, and since the stacking direction of the filling layer 32 and the glue layer 31 is consistent with the gravity direction, the filling layer 32 and the glue layer 31 can be naturally maintained at the desired position and separated from each other only by performing the step-wise filling, and the filling layer 32 and the glue layer 31 can be maintained at the desired position without providing other separators to separate the filling layer 32 and the glue layer 31, and without using other measures to maintain the filling layer 32 and the glue layer 31 at the desired position, the structure and the operation are simple, and the position of the glue layer 31 can be controlled more accurately, so that the glue layer 31 can bond the battery cell 1 and the box 2 more accurately at the necessary bonding region, and better strength performance can be obtained.

In the case of the case 2 including the sleeve 21 and the two lids 22, the gap 4 in which the filler 3 is located may be the gap 4 between the unit module 30 and the sleeve 21 or the gap 4 between the unit module 30 and the lid 22. When the filler 3 is located in the gap 4 between the battery cell 1 and the sleeve 21, the filling is more convenient, and the bonding effect is better.

As an example of the filler 3 being located in the gap 4 between the cell module 30 and the sleeve 21, see fig. 2, the filler 3 is provided in the gap 4 between the cell module 30 and the side plate 25 of the sleeve 21. As described above, the side plates 25 have a smaller thickness than the end plates 26, and therefore, the gap between the side plates 25 and the cell modules 30 is relatively large, which facilitates filling of the filler 3 and contributes to an increase in 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 disposed in the gap 4 between the cell module 30 and the side plate 25, the adhesive area of the adhesive layer 31 is larger under the condition that the heights are the same in the first direction Z, as compared to the case where the filler 3 is disposed in the gap 4 between the cell module 30 and the end plate 26, and therefore, it is advantageous to achieve a more firm adhesion between the cell module 30 and the case 2.

Referring to fig. 4-6, in some embodiments, the filling layers 32 and the glue layers 31 are alternately stacked, that is, the filling layers 32 and the glue layers 31 are stacked in such a manner that, in the stacking direction, one glue layer 31, one filling layer 32, another glue layer 31, and another filling layer 32 are stacked repeatedly, so that the filler 3 is a multi-layer filling structure of at least three layers, and any one filling layer 32 is located between two adjacent glue layers 31. This kind of glue film 31 and the mode that filling layer 32 filled in turn for two or more spaced position departments in proper order in range upon range of direction all are equipped with glue film 31, thereby each glue film 31 can bond battery monomer 1 in the different positions on range upon range of direction, conveniently realizes more steady firm whole bonding effect.

Referring to fig. 2-6, in some embodiments, the size of the filler 3 is equal to the size of the cavity 24 in the stacking direction of the glue layer 31 and the filling layer 32, that is, the filler 3 fills the gap 4 in the stacking direction of the filling layer 32 and the glue layer 31. At this time, each position of the gap 4 in the stacking direction is filled with the filler 3, and there is no situation that there is the filler 3 in one part of the region and there is no filler 3 in the other part of the region, so that the overall structure is relatively flat, and the single module 30 is not inclined because the filler 3 is not filled in a certain part of the region in the stacking direction, which is beneficial to further improving the setting stability of the single module 30 in the box 2.

In the specific filling, the filling ratio of the glue layer 31 and the filling layer 32 can be designed according to the actual situation (such as the overall size of the cavity 24 in the stacking direction and the effective bonding area requirement).

For example, in some embodiments, the size of each of the glue layer 31 and the fill layer 32 in the stacking direction is at least 5% of the size of the cavity 24 in the stacking direction. Therefore, the ratio of each adhesive layer 31 to each filling layer 32 is not too small, which not only facilitates the requirement of effective bonding area, but also prevents the filling control difficulty of each adhesive layer 31 or each filling layer 32 from increasing due to too small ratio. When the proportion is too small, overfilling is easily caused, that is, when the proportion is too small, excessive filling is easily caused in the process of filling a certain layer, the required filling area is exceeded, the overall filling effect is influenced, and even the bonding strength is influenced.

For another example, in some embodiments, the size of each adhesive layer 31 in the stacking direction is 10 to 30mm, and at this time, the proportion of each adhesive layer 31 is appropriate, so that on the basis of meeting the requirement of the effective bonding area, the amount of adhesive solution is reduced, the number of times of adhesive filling is reduced, and the difficulty of adhesive filling is reduced.

For another example, in some embodiments, the filler layer 32 has a dimension in the stacking direction of 3 to 10mm. At this time, the proportion of each filling layer 32 is small and appropriate, so that the glue solution consumption is reduced on the basis of meeting the requirement of the effective bonding area, and effective separation of different glue layers 31 is realized.

In the foregoing embodiments, the material and form of the filling layer 32 may be varied.

For example, in some embodiments, the filler layer 32 has a density less than that of the glue layer 31. Thus, under the condition of the same volume, the filling layer 32 is lighter than the adhesive layer 31, and therefore, the filling layer 32 with lighter density is used for replacing the adhesive liquid in the corresponding area, which is beneficial to reducing the whole weight of the battery 10 and improving the energy density of the battery 10.

For another example, referring to fig. 6, in some embodiments, the fill layer 32 is a granular layer 33. At this time, the packed layer 32 includes many small particles stacked together. Because gaps exist between adjacent particles, and the corresponding gaps are filled with air without solid substances, the weight is reduced and the energy density of the battery 10 is improved compared with the case where the filling layer 32 is a non-particle layer.

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 filler layer 32 is a particle layer 33 (may be referred to as a light particle layer) having a density lower than that of the glue solution, and can be reduced in weight not only from the viewpoint of material but also from the viewpoint of form of the filler layer 32, that is, in this case, both of the material and the form of the filler layer 32 can be reduced in weight, and therefore, the energy density of the battery 10 can be more effectively increased.

The embodiments shown in fig. 2-6 will be further described below.

As shown in fig. 2 to 6, in this embodiment, the case 2 of the battery 10 has a cubic shape, the sleeve 21 of which is sequentially connected end to end by two end plates 26 and two side plates 25 to form a hollow cubic shape, and two covers 22 of which are connected to opposite ends of the sleeve 21 in the first direction Z, wherein one cover 22 is integrated with the sleeve 21 to form a bottom plate, and the other cover 22 is detachably connected with the sleeve 21 to form a top cover. The two caps 22 close off the opposite ends of the sleeve 21 in the first direction Z, so that a chamber 24 for housing the single modules 30 is formed inside the box 2.

As shown in fig. 2, in this embodiment, the cell module 30 includes a plurality of battery cells 1 arranged in a matrix. All the battery cells 1 are cuboidal and are arranged in the box 2 in a vertically-arranged manner. Specifically, the largest surfaces 19 of the battery cells 1 face the end plates 26 of the case 2, perpendicularly to the side plates 25, and the electrode terminals 16 of the battery cells 1 are each located on the surface of the battery cell 1 facing the cover 22 (i.e., the top cover) to which the sleeve 21 is detachably attached, i.e., the electrode terminals 16 of the battery cells 1 are each located on the surface of the battery cell 1 adjacent to the largest surfaces 19.

As shown in fig. 2, in this embodiment, a gap 4 is provided between the single module 30 and each of the two side plates 25 to facilitate the placement of the single module 30 into the box 2. The cell modules 30 may be compressed prior to being placed in the case 2 so that the cells 1 of the cell modules 30 are arranged relatively close together.

Also, as shown in fig. 2, in this embodiment, the fillers 3 are provided in the gaps 4 between the unit modules 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 packing 3 is insulated as a whole to insulate the unit modules 30 from the case 2, preventing short circuits between the unit modules 30 and the case 2.

The structure of the two fillers 3 is the same, which can simplify the overall structure of the battery 10.

Fig. 6 further shows the structure of the filler 3. As shown in fig. 6, in this embodiment, the filler 3 fills the gap 4 with a height equal to the height of the gap 4. As previously mentioned, the height refers to the dimension in the first direction Z. As shown in fig. 6, 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 spaced in the first direction Z, and one filling layer 32 is disposed between any two adjacent adhesive layers 31, thereby forming a sandwich structure. If the top and bottom in fig. 6 are taken as top and bottom, in this embodiment, the layers of the filler 3 are, from bottom to top, the glue layer 31, the filling layer 32, and the glue layer 31, in that order, as can be seen from fig. 6. The up-down direction in fig. 6 is along a first direction Z, wherein the direction from the bottom plate (i.e. one of the covers 22 non-detachably connected to the sleeve 21) to the top plate (i.e. one of the covers 22 detachably connected to the sleeve 21) is up, and the direction from the top plate to the bottom plate is down, which is the same direction as gravity.

Each of the filler layers 32 is a particle layer 33 made of silica gel particles. The silica gel particles are not glue solution, are granular, have lower density than the glue solution, are insulating, flame-retardant and softer. Therefore, the filling layer 32 composed of silica gel particles is a light and insulating non-glue particle layer, is not a glue solution, and is light in weight, soft in hardness, insulating, and flame retardant.

In particular, when manufacturing the battery 10, the gap 4 may be alternately filled with gel and silica gel particles after the cell module 30 is pressed into the case. The glue injection can be carried out by the glue injection head in three times to form three glue layers 31, and the height of single glue injection is controlled to be 10-30 mm, so that the height of each glue layer 31 is 10-30 mm. And (3) filling silica gel particles between two adjacent glue injection operations to form two filling layers 32, wherein the single filling height is controlled to be 3-10 mm, so that the height of each filling layer 32 is 3-10 mm. Thus, filler 3 having a five-layer filling structure shown in fig. 6 is obtained.

Wherein, the effective bonding area demand of monomer module 30 is satisfied in the sum of the bonding area of three-layer glue film 31, and three-layer glue film 31 bonds monomer module 30 and case 2 respectively in the upper, middle and lower three parts region of first direction Z, consequently, bonding strength is higher, and the bonding steadiness is higher, can realize the firm setting of monomer module 30 in case 2.

In three-layer glue film 31, between arbitrary adjacent two-layer glue film 31, by the interval of filling layer 32, because filling layer 32 is not the glue film, consequently, utilize its original glue solution of replacing between arbitrary adjacent two-layer glue film 31, can effectively reduce the glue solution quantity to, because filling layer 32 is the light granular layer, consequently, can also alleviate battery 10's whole weight, improve battery 10's energy density.

Therefore, the embodiment can reduce the overall weight of the battery 10 and improve the energy density of the battery 10 under the condition of effectively reducing the consumption of the glue solution.

In addition, through the filling proportion of control glue film 31 and filling layer 32, can comparatively accurately control the position of glue film 31 on first direction Z, realize comparatively accurate rubber coating process, this not only can further reduce the glue solution extravagant to still be convenient for satisfy the sticky demand of not co-altitude position more accurately, obtain better intensity performance.

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

In addition, referring to fig. 7, the present application also provides a method of manufacturing a battery 10, which includes:

s100, placing a monomer module 30 comprising at least one battery monomer 1 into a box 2; and

s200, filling the gap 4 between the monomer module 30 and the inner wall of the box 2 with the glue layer 31, filling the gap 4 with the filling layer 32 which is a non-glue substance, and enabling the filling layer 32 and the glue layer 31 to be arranged in a laminated mode.

Based on steps S100 and S200, the gap 4 between the single module 30 and the box 2 is no longer completely filled with glue solution, so that the amount of glue solution can be effectively reduced, and waste of glue solution can be prevented.

Wherein, 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 alternately filled.

The alternately filling of the glue layers 31 and the filling layers 32 can obtain the alternately stacked glue layers 31 and filling layers 32, which is more convenient for realizing the gluing of at least two positions spaced from each other and is beneficial to obtaining better bonding effect.

The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A battery (10), comprising:

a case (2) provided with a chamber (24) therein;

a cell module (30) disposed in the chamber (24) and comprising at least one battery cell (1); and

the filler (3) is arranged in a gap (4) between the monomer module (30) and the inner wall of the box (2) and comprises a glue layer (31) and a filling layer (32), and the filling layer (32) is a non-glue substance and is arranged in a laminated mode with the glue layer (31).

2. The battery (10) of claim 1, wherein the filler layer (32) is configured as at least one of:

the density of the filling layer (32) is less than that of the glue layer (31);

the filling layer (32) is a particle layer (33);

the filling layer (32) comprises foam, silica gel particles or high molecular organic matter particles.

3. The battery (10) according to claim 1 or 2, wherein the filler (3) is configured as at least one of:

the filling layers (32) and the glue layers (31) are alternately arranged in a stacked manner;

the size of the filler (3) is equal to the size of the cavity (24) in the stacking direction of the glue layer (31) and the filling layer (32);

the size of the glue layer (31) and the filling layer (32) in the stacking direction accounts for at least 5% of the size of the cavity (24) in the stacking direction;

the size of the glue layer (31) in the laminating direction is 10-30 mm;

the dimension of the filling layer (32) in the stacking direction is 3-10 mm.

4. The battery (10) according to any one of claims 1 to 3, wherein the case (2) comprises a sleeve (21) and two covers (22), the two covers (22) being provided at opposite ends of the sleeve (21) in the first direction (Z), at least one of the two covers (22) being detachably attached to the sleeve (21), the stacking direction of the filling layer (32) and the glue layer (31) being along the first direction (Z).

5. The battery (10) according to claim 4, wherein the filler (3) is disposed in a gap (4) between the cell module (30) and the sleeve (21).

6. Battery (10) according to claim 5, characterised in that said sleeve (21) comprises two side plates (25) and two end plates (26) connected to each other, said two side plates (25) being arranged opposite along a second direction (X), said two end plates (26) being arranged opposite along a third direction (Y), said second direction (X) and said third direction (Y) being perpendicular to each other and to said first direction (Z), said filler (3) being provided in the gap (4) between said single-block module (30) and said side plates (25).

7. Battery (10) according to claim 6, characterised by the fact that said side plate (25) is perpendicular to the maximum surface (19) of said battery cell (1).

8. An electric device (100) comprising a body (20), characterized in that it further comprises a battery (10) according to any one of claims 1 to 7, said battery (10) being arranged on said body (20) and supplying said body (20) with electric energy.

9. A method of manufacturing a battery (10), comprising:

placing a cell module (30) comprising at least one battery cell (1) into a case (2); and

and filling a glue layer (31) in a gap (4) between the monomer module (30) and the inner wall of the box (2), filling a non-glue filling layer (32) in the gap (4), and laminating the glue layer (31) and the filling layer (32).

10. The manufacturing method according to claim 9, characterized in that, when filling the gap (4) with the glue layer (31) and the filler layer (32), the glue layer (31) and the filler layer (32) are alternately filled.

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