Batteries and electrical devices

Abstract

The present application is applicable to the field of battery technology, and provides a battery and an electrical device, wherein the electrical device includes a battery, the battery includes a strapping tape and a plurality of battery cells, the strapping tape includes a metal tape and an insulating layer, the metal tape surrounds the plurality of battery cells, the insulating layer is disposed on the surface of the metal tape, and at least partially located between the metal tape and the battery cells. By disposing an insulating layer on the surface of the metal tape, at least a portion of the metal tape is located between the metal tape and the battery cells to achieve an insulating effect. In this way, there is no need to limit the material of the insulating layer to a heat shrink material or other material, so that the range of optional materials for the insulating layer is very large. In this way, a material with higher wear resistance can be selected according to actual needs, thereby improving the wear resistance of the insulating layer, that is, improving the wear resistance of the strapping tape, which helps to improve the stability and durability of the insulation effect between the strapping tape and the battery cells.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and more specifically, relates to a battery and an electrical device. Background Art

[0002] In some cases, the strapping tape includes a metal tape and a heat shrinkable tube, the heat shrinkable tube is sleeved outside the metal tape and has insulating properties, so that the heat shrinkable tube can achieve insulation between the metal tape and the battery cell when the strapping tape is used to strap the battery cell. Specifically, the heat shrinkable tube is first installed on the metal tape, and then a high temperature environment is provided so that the heat shrinkable tube shrinks and is fixed on the metal tape in the high temperature environment, and finally the strapping tape with the heat shrinkable tube fixed thereon is used to strap multiple battery cells.

[0003] This arrangement requires that the heat shrink tubing must be made of a material with heat shrinking properties so that the heat shrink tubing can be heat-shrunk and fixed to the metal belt in a high temperature environment. For example, Teflon material, which greatly limits the materials that can be used for the heat shrink tubing. Therefore, the heat shrink tubing has poor wear resistance and is prone to wear after use, thereby affecting the insulation effect between the metal belt and the battery cell. Utility Model Content

[0004] In view of the above problems, the embodiments of the present application provide a battery and an electrical device, which can improve the technical problem of poor wear resistance of the strapping belt.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0006] Multiple battery cells;

[0007] The strapping belt comprises a metal belt and an insulating layer. The metal belt surrounds a plurality of battery cells. The insulating layer is arranged on the surface of the metal belt and is at least partially located between the metal belt and the battery cells.

[0008] The battery provided in the embodiment of the present application achieves an insulating effect by providing an insulating layer on the surface of the metal strip so that at least part of the metal strip is located between the metal strip and the battery cell. In this way, there is no need to limit the material of the insulating layer to a heat shrink material or other material, so that the range of optional materials for the insulating layer is very large. In this way, a material with higher wear resistance can be selected according to actual needs, thereby improving the wear resistance of the insulating layer, that is, improving the wear resistance of the strapping tape, which helps to improve the stability and durability of the insulation effect between the strapping tape and the battery cell.

[0009] In some embodiments, the insulating layer includes a nylon layer.

[0010] Such arrangement enables the insulating layer to have better insulation performance, wear resistance and voltage resistance, thereby enabling the strapping belt to have better insulation performance, wear resistance and voltage resistance.

[0011] In some embodiments, the metal strip comprises:

[0012] A first wall and a second wall are arranged opposite to each other along a first direction;

[0013] The third wall and the fourth wall are arranged opposite to each other along the second direction;

[0014] A plurality of curved portions, wherein a curved portion is connected between the first wall and the third wall, between the first wall and the fourth wall, between the second wall and the third wall, and between the second wall and the fourth wall;

[0015] Wherein, at least part of the insulating layer is arranged on the surfaces of the first wall, the second wall, the third wall and the fourth wall; and the first direction intersects with the second direction.

[0016] Such an arrangement enables the insulating layer to cover the metal strip as much as possible, namely, to increase the coverage of the insulating layer on the metal strip, thereby achieving insulation between most of the metal strip and the battery cell, thereby improving the insulation effect.

[0017] In some embodiments, a portion of the insulating layer is disposed on a surface of the bent portion.

[0018] Such an arrangement can improve the coverage of the insulating layer on the metal strip, and can improve the insulation effect between the metal strip and the battery cell, so as to improve the insulation effect between the battery cell and the strapping tape.

[0019] In some embodiments, the metal strip includes a main body, a first end and a second end, the first end and the second end are respectively arranged at opposite ends of the main body and fixedly connected; the insulating layer includes a first part, the first part is arranged on the surface of the main body, and at least partially located between the main body and the battery cell.

[0020] Such an arrangement can achieve insulation between the main body of the metal belt and the battery cell, thereby achieving insulation between the majority of the metal belt and the battery cell, and improving the insulation effect of the strapping belt.

[0021] In some embodiments, at least a portion of the first portion is extrusion-connected to the body portion;

[0022] and / or, at least a portion of the first portion is injection-moldedly connected to the main body portion;

[0023] and / or, at least a portion of the first portion is connected to the main body portion by dip-molding;

[0024] and / or, at least a portion of the first portion is applied to the body portion;

[0025] And / or, at least a portion of the first portion is bonded to the main body.

[0026] Such arrangement enables the first part to be fixed to the surface of the main body by at least one of extrusion, injection molding, dipping, coating, bonding and the like, thereby improving the flexibility of fixing the first part on the main body.

[0027] In some embodiments, the first end portion and the second end portion are fixed by welding.

[0028] Such an arrangement can improve the bundling strength of the bundling belt for multiple battery cells, thereby effectively improving the effect of resisting the expansion force of the battery cells.

[0029] In some embodiments, along the thickness direction of the metal strip at the first end, the first end portion and the second end portion are stacked.

[0030] Such an arrangement enables the first end portion and the second end portion to have a larger contact area, thereby helping to improve the connection strength between the first end portion and the second end portion, and further can improve the bundling strength of the bundling belt to the battery cell.

[0031] In some embodiments, the first end is located between the battery cell and the second end; the insulating layer further includes a second portion, at least a portion of the second portion is disposed on a side of the first end close to the battery cell.

[0032] Such an arrangement enables an insulating layer to be basically provided between the metal belt and the battery cell, so that insulation between the metal belt and the battery cell can be achieved in a larger range, thereby improving the insulating effect of the strapping belt.

[0033] In some embodiments, at least a portion of the second portion is further disposed on a side of the second end away from the first end.

[0034] Such an arrangement can also achieve insulation between the metal belt and other conductive parts except the battery cell, thereby improving the problem of internal short circuit of the battery and improving the reliability of the battery.

[0035] In some embodiments, at least a portion of the second portion is extrusion-connected to the first end and / or the second end;

[0036] and / or, at least a portion of the second portion is injection molded and connected to the first end portion and / or the second end portion;

[0037] and / or, at least a portion of the second portion is dip-molded and connected to the first end portion and / or the second end portion;

[0038] and / or, at least a portion of the second portion is applied to the first end portion and / or the second end portion;

[0039] And / or, at least a portion of the second portion is bonded to the first end portion and / or the second end portion.

[0040] Such a configuration enables the second part to be fixed to the surface of at least one of the first end and the second end by at least one of extrusion, injection molding, dipping, coating, bonding, etc., thereby improving the flexibility of fixing the second part on at least one of the first end and the second end.

[0041] In some embodiments, an edge of a contact position between the first end portion and the second end portion is exposed outside the insulating layer.

[0042] Such an arrangement allows the edge of the contact position between the first end and the second end to be used as a weld for butt welding, thereby improving the welding strength between the first end and the second end, and further improving the bundling strength of the bundling belt to the battery cell.

[0043] In some embodiments, the metal strip comprises a steel strip.

[0044] Such an arrangement enables the strapping belt to have a higher structural strength, thereby improving the strapping strength of the strapping belt to the battery cell.

[0045] In a second aspect, an embodiment of the present application provides an electrical device, including a battery.

[0046] The electrical device provided in the embodiment of the present application can improve the reliability of the battery by adopting the above-mentioned battery, thereby improving the reliability of the electrical device.

[0047] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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.

[0049] Figure 1 A schematic diagram of a vehicle provided for some embodiments of the present application;

[0050] Figure 2 An exploded schematic diagram of a battery provided in some embodiments of the present application;

[0051] Figure 3 A schematic diagram of the cooperation between the strapping tape and the battery cell provided in some embodiments of the present application;

[0052] Figure 4A three-dimensional schematic diagram of a strapping belt provided in some other embodiments of the present application;

[0053] Figure 5 for Figure 4 A partial enlarged view of

[0054] Figure 6 for Figure 3 Section view along AA;

[0055] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0056] Among them, the reference numerals in the figure are:

[0057] 1000-vehicle; 100-battery; 200-controller; 300-motor; 10-battery cell; 20-box; 201-accommodation space; 21-first box part; 22-second box part; 30-binding belt; 31-metal belt; 311-main body; 3111-first wall; 3112-second wall; 3113-third wall; 3114-fourth wall; 3115-bend part; 312-first end; 313-second end; 32-insulating layer; 321-first part; 322-second part; Y-first direction; X-second direction; Z-third direction. DETAILED DESCRIPTION

[0058] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0059] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0061] In the description of the present application, "plurality" means more than two, and unless otherwise clearly and specifically defined, "more than two" includes two. Accordingly, "multiple groups" means more than two groups, including two groups.

[0062] In the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In the description of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, in this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0064] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0065] In the related art, a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar. Hybrid connection means that multiple battery cells are connected in series and in parallel. In addition, multiple battery cells are usually bundled together with a strapping tape to form a battery module.

[0066] In some cases, the strapping tape includes a metal tape and a heat shrinkable tube, which is sleeved outside the metal tape and has insulating properties, so that the heat shrinkable tube can achieve insulation between the metal tape and the battery cell when the strapping tape is used to strap the battery cell. Specifically, the heat shrinkable tube is first installed on the metal tape, and then a high temperature environment is provided so that the heat shrinkable tube shrinks and is fixed on the metal tape under the high temperature environment, and finally the strapping tape fixed with the heat shrinkable tube is used to strap multiple battery cells. However, such a setting requires the heat shrinkable tube to be made of a material with heat shrinkability so that the heat shrinkable tube can be heat-shrunk and fixed to the metal tape under a high temperature environment. For example, Teflon material makes the materials that can be used for the heat shrinkable tube very limited. Therefore, the wear resistance of the heat shrinkable tube is poor, and it is easy to wear after use, so as to affect the insulation effect between the metal tape and the battery cell. It can be understood that the wear resistance of the strapping tape is poor, and it is easy to wear after use, so that the insulation effect between the strapping tape and the battery cell fails.

[0067] Based on the above considerations, the embodiments of the present application provide a battery and an electrical device, which achieves an insulation effect by providing an insulating layer on the surface of a metal belt so that at least part of the metal belt is located between the metal belt and the battery cell. In this way, there is no need to limit the material of the insulating layer to a heat shrink material or other material, so that the range of optional materials for the insulating layer is very large. In this way, a material with higher wear resistance can be selected according to actual needs, thereby improving the wear resistance of the insulating layer, that is, improving the wear resistance of the strapping tape, which helps to improve the stability and durability of the insulation effect between the strapping tape and the battery cell.

[0068] In some embodiments, the battery involved in the embodiments of the present application can be used in an electrical device that uses the battery as a power source.

[0069] The electrical devices involved in the embodiments of the present application may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, vehicles, ships, spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, and the like. According to the power source, the vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like. According to the drive mode, the vehicle may be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle.

[0070] In other embodiments, the battery involved in the embodiments of the present application can also be used in an energy storage device, wherein the energy storage device can be an energy storage container, an energy storage cabinet, etc.

[0071] The battery involved in the embodiment of the present application can be a single physical module including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar component. Hybrid connection means that multiple battery cells are connected in both series and in parallel.

[0072] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module. As an example, the multiple battery cells may be fixed by cable ties or the like to form a battery module. As an example, the multiple battery cells may also be fixed by end plates, side plates, or the like to form a battery module.

[0073] In other embodiments, the battery may be a battery pack, which may include a box and a battery cell. As an example, the battery cell may be directly accommodated in the box. As an example, the battery cell may also be formed into a battery module first and then accommodated in the box.

[0074] The battery cell involved in the embodiments of the present application refers to the smallest unit for storing and outputting electric energy. The battery cell may be a secondary battery or a primary battery. The battery cell may be, but is not limited to, a metal battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell may be cylindrical, flat, rectangular, or in other shapes.

[0075] For ease of description, the embodiments of the present application are described using an electrical device as a vehicle as an example.

[0076] In some embodiments, see Figure 1 , Figure 1 Schematic diagram of a vehicle 1000 provided for some embodiments of the present application. The above-mentioned battery 100 is disposed inside the vehicle 1000, and the battery 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000, for example, the battery 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0077] In some embodiments, the battery 100 can be used not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0078] In some embodiments, see Figure 2 , Figure 2The exploded view of the battery 100 provided in some embodiments of the present application. The battery 100 may include a housing 20 and a plurality of battery cells 10. The housing 20 is a structure having a receiving space 201 inside, and the receiving space 201 of the housing 20 is used to receive the battery cells 10.

[0079] The box body 20 can adopt a variety of structures. In some embodiments, the box body 20 can include a first box portion 21 and a second box portion 22, which cover each other and jointly define the above-mentioned storage space 201. The first box portion 21 can be a hollow structure with an opening at one end, and the second box portion 22 is a plate-like structure, which covers the opening side of the first box portion 21, so that the first box portion 21 and the second box portion 22 jointly define the above-mentioned storage space 201. Alternatively, please refer to Figure 2 The first box part 21 and the second box part 22 can both be hollow structures with an opening at one end, and the opening side of the first box part 21 covers the opening side of the second box part 22, so that the first box part 21 and the second box part 22 jointly define the above-mentioned accommodation space 201. Among them, the box body 20 composed of the first box part 21 and the second box part 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0080] In some embodiments, multiple battery cells 10 can be connected in series, in parallel or in a mixed connection to form a whole, and then the whole formed by the multiple battery cells 10 is directly accommodated in the above-mentioned accommodation space 201 of the box 20. In other embodiments, multiple battery cells 10 can also be connected in series, in parallel or in a mixed connection first, and arranged and fixed to form a battery module, and the battery module is accommodated in the above-mentioned accommodation space 201 of the box 20. In some other embodiments, multiple battery cells 10 can also be connected in series, in parallel or in a mixed connection first, and arranged and fixed to form multiple battery modules, and multiple battery modules are then connected in series, in parallel or in a mixed connection to form a whole, and accommodated in the above-mentioned accommodation space 201 of the box 20.

[0081] In some embodiments, the box 20 of the battery 100 can be used as part of the chassis structure of the vehicle 1000. For example, part of the box 20 can become at least a part of the chassis of the vehicle 1000, or part of the box 20 can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0082] Please also read Figures 3 to 7 ,in, Figure 3 This is a schematic diagram of the cooperation between the strapping belt 30 of the battery 100 and the battery 100 provided in some embodiments of the present application. Figure 4 Schematic diagram of a strapping band 30 of a battery 100 provided in some other embodiments of the present application, Figure 5 for Figure 4 A partial enlarged view of Figure 6 for Figure 3 The cross-sectional view of AA in the figure, Figure 7 for Figure 6 The battery 100 provided in the embodiment of the present application includes a strapping tape 30 and a plurality of battery cells 100. The strapping tape 30 includes a metal tape 31 and an insulating layer 32. The metal tape 31 surrounds the plurality of battery cells 100, and the insulating layer 32 is disposed on the surface of the metal tape 31, and at least a portion of the insulating layer 32 is located between the metal tape 31 and the battery cells 100.

[0083] The metal strap 31 refers to a cable tie made of metal material, and the metal material may be, but is not limited to, copper, steel, aluminum alloy, etc.

[0084] The metal belt 31 surrounds a plurality of battery cells 100 , so that the plurality of battery cells 100 can be bundled by the metal belt 31 , thereby the plurality of battery cells 100 are bundled to form a battery module 100 .

[0085] The insulating layer 32 refers to a structural layer with insulating properties, that is, a structural layer made of an insulating material. The insulating material of the insulating layer 32 may be, but is not limited to, nylon.

[0086] The insulating layer 32 may cover a portion of the surface of the metal strip 31 , or may completely cover the surface of the metal strip 31 .

[0087] At least a portion of the insulating layer 32 covers the side of the metal strip 31 facing the battery 100 cell so as to be located between the metal strip 31 and the battery 100 cell, thereby achieving insulation between the battery 100 cell and the metal strip 31 .

[0088] The battery 100 provided in the embodiment of the present application achieves an insulation effect by providing an insulating layer 32 on the surface of the metal strip 31 so that at least part of the metal strip 31 is located between the metal strip 31 and the battery 100 monomer. In this way, there is no need to limit the material of the insulating layer 32 to a heat shrink material or other material, so that the material selection range of the insulating layer 32 is very large. In this way, a material with higher wear resistance can be selected according to actual needs, thereby improving the wear resistance of the insulating layer 32, that is, improving the wear resistance of the strapping 30, which helps to improve the stability and durability of the insulation effect between the strapping 30 and the battery 100 monomer, thereby improving the reliability of the battery 100. In addition, a material with higher voltage resistance can also be selected, thereby improving the voltage resistance of the insulating layer 32 to improve the voltage resistance of the strapping 30.

[0089] In some cases, the heat shrink tubing is installed on the metal strip 31 and heat-shrunk and fixed to the metal strip 31 to achieve an insulating layer 32 between the metal strip 31 and the battery 100 cells. In this solution, the heat shrink tubing is generally arranged on two sides of the metal strip 31, so that a large part of the metal strip 31 is not insulated from the battery 100 cells. In the battery 100 provided in the embodiment of the present application, since the insulating layer 32 is directly arranged on the surface of the metal strip 31, the insulating layer 32 can be arranged on the surface of any part of the metal strip 31, and is not limited to two sides of the metal strip 31. In this way, insulation can be achieved between most of the metal strip 31 and the battery 100 cells, thereby improving the insulation effect.

[0090] In addition, it is difficult to install the heat shrink tube at the bending position of the metal strip 31. Even if the heat shrink tube is installed at the bending position, the structural strength of the heat shrink tube at this position is low, and it is easy to break, which affects the insulation effect between the metal strip 31 and the battery 100 monomer at this position. In the embodiment of the present application, the insulating layer 32 is directly arranged on the surface of the metal strip 31 without installation, which facilitates the arrangement of the insulating layer 32 at the bending position of the metal strip 31, and the insulating layer 32 at the bending position is not easy to break, thereby improving the insulation effect between the battery 100 monomer and the metal strip 31.

[0091] In some embodiments, insulating layer 32 includes a nylon layer.

[0092] It is understandable that at least a portion of the insulating layer 32 may be a structural layer made of nylon material. The insulating layer 32 may be a nylon layer, or a portion of the insulating layer 32 may be a nylon layer.

[0093] Such configuration enables the insulating layer 32 to have better insulation performance, wear resistance and voltage resistance performance, thereby enabling the strapping belt 30 to have better insulation performance, wear resistance and voltage resistance performance.

[0094] In some embodiments, please refer to Figures 3 to 5 , and in combination with other drawings. The metal strip 31 includes a first wall 3111, a second wall 3112, a third wall 3113, a fourth wall 3114 and a plurality of bent portions 3115. The first wall 3111 and the second wall 3112 are spaced and arranged oppositely along the first direction Y, and the third wall 3113 and the fourth wall 3114 are spaced and arranged oppositely along the second direction X. The bent portions 3115 are connected between the first wall 3111 and the third wall 3113, between the first wall 3111 and the fourth wall 3114, between the second wall 3112 and the third wall 3113, and between the second wall 3112 and the fourth wall 3114. Among them, at least part of the insulating layer 32 is arranged on the surface of the first wall 3111, the surface of the second wall 3112, the surface of the third wall 3113, and the surface of the fourth wall 3114. Among them, the first direction Y and the second direction X intersect.

[0095] It can be understood that the metal strip 31 is roughly formed into a square. The metal strip 31 is bent and arranged between the first wall 3111 and the third wall 3113, between the first wall 3111 and the fourth wall 3114, between the second wall 3112 and the third wall 3113, and between the second wall 3112 and the fourth wall 3114, so that the metal strip 31 is roughly bent into a square. The first wall 3111 and the third wall 3113 are connected by a bent portion 3115, the first wall 3111 and the fourth wall 3114 are connected by a bent portion 3115, the second wall 3112 and the third wall 3113 are connected by a bent portion 3115, and the second wall 3112 and the fourth wall 3114 are connected by a bent portion 3115.

[0096] At least part of the insulating layer 32 is arranged on the surface of the first wall 3111, the surface of the second wall 3112, the surface of the third wall 3113 and the surface of the fourth wall 3114, so that the insulating layer 32 can be provided between the first wall 3111 and the battery 100 cell, between the second wall 3112 and the battery 100 cell, between the third wall 3113 and the battery 100 cell, and between the fourth wall 3114 and the battery 100 cell, thereby achieving insulation between the first wall 3111, the second wall 3112, the third wall 3113, the fourth wall 3114 and the battery 100 cell respectively.

[0097] Such arrangement enables the insulating layer 32 to cover the metal strip 31 as much as possible, namely, increases the coverage of the insulating layer 32 on the metal strip 31, thereby achieving insulation between most of the metal strip 31 and the battery 100 cells, thereby improving the insulation effect.

[0098] It should be noted that the intersection of the first direction Y and the second direction X means that the first direction Y and the second direction X can form an angle greater than 0° and less than 180°, that is, the first direction Y and the second direction X are not parallel. The first direction Y and the second direction X can be perpendicular to each other or not. The first direction Y and the second direction X can be directions that intersect on the same plane or on planes that are not aligned with each other, and the projection of the second direction X on the plane where the first direction Y is located can intersect with the first direction Y. As an example, Figure 3 As shown, the first direction Y is perpendicular to the second direction X, the first direction Y is parallel to the thickness direction of the battery 100, and the second direction X is parallel to the width direction of the battery 100.

[0099] In addition, the first direction Y and the second direction X are respectively perpendicular to the third direction Z. In some cases, the third direction Z is parallel to a height direction of the battery 100 cells.

[0100] In some embodiments, please refer to Figures 3 to 5, and in combination with other drawings, a portion of the insulating layer 32 is disposed on the surface of the bent portion 3115 .

[0101] By adopting the above technical solution, an insulating layer 32 can be provided between the curved portion 3115 and the battery 100 monomer, so that insulation between the curved portion 3115 and the battery 100 monomer can be achieved. Therefore, compared with the heat shrink tubing installed on the metal belt 31, the insulating layer 32 is not easy to break when the metal belt 31 is bent to form the curved portion 3115. In addition, there are many optional materials for the insulating layer 32, and a bending-resistant material can be selected, so that the insulating layer 32 is stably arranged on the metal belt 31 and is not easy to break. In this way, the coverage of the insulating layer 32 on the metal belt 31 can be increased, and the insulation effect between the metal belt 31 and the battery 100 monomer can be improved, so as to improve the insulation effect between the battery 100 monomer and the strapping belt 30.

[0102] In some embodiments, please refer to Figures 3 to 7 , and in combination with other drawings. The metal strip 31 includes a main body 311, a first end 312 and a second end 313, the first end 312 and the second end 313 are respectively disposed at opposite ends of the main body 311, and the first end 312 and the second end 313 are fixedly connected. The insulating layer 32 includes a first portion 321, the first portion 321 is disposed on the surface of the main body 311, and at least part of the first portion 321 is located between the main body 311 and the battery 100 monomer.

[0103] The metal strip 31 is in a strip-shaped structure, and has a head end and a tail end in the length direction, and the first end 312 and the second end 313 of the metal strip 31 are respectively the head end and the tail end of the metal strip 31. The first end 312 and the second end 313 are fixedly connected, so that the metal strip 31 is connected head to tail, thereby roughly forming a square.

[0104] The first portion 321 is a portion of the insulating layer 32 and also has insulating properties.

[0105] The first portion 321 is disposed on the surface of the body portion 311 , and at least a portion of the first portion 321 is located between the body portion 311 and the battery 100 cell, so that insulation between the body portion 311 and the battery 100 cell can be achieved.

[0106] In some cases, the insulating layer 32 may be provided only on the surface of the main body 311 of the metal strip 31, and the insulating layer 32 is the first portion 321. Alternatively, in other cases, the first portion 321 of the insulating layer 32 may be provided on the main body 311 of the metal strip 31, and the insulating layer 32 may also be provided on at least one of the first end 312 and the second end 313.

[0107] Such a configuration can achieve insulation between the main body 311 of the metal belt 31 and the battery 100, so as to achieve insulation between the majority of the metal belt 31 and the battery 100, thereby improving the insulation effect of the strapping belt 30.

[0108] It should be supplemented here that the main body 311 is provided with the above-mentioned first wall 3111 , second wall 3112 , third wall 3113 , fourth wall 3114 and multiple bending parts 3115 , and the first end 312 and the second end 313 are also arranged on the first wall 3111 .

[0109] At least a portion of the first portion 321 and the main body 311 may be connected in at least one of the following ways.

[0110] In some embodiments, at least a portion of the first portion 321 is connected to the main body portion 311 by extrusion molding.

[0111] It is understandable that extrusion can be performed by an extruder so that at least a portion of the first portion 321 is coated on the surface of the main body 311. At least a portion of the first portion 321 is an extrusion layer.

[0112] In some other embodiments, at least a portion of the first portion 321 is connected to the main body 311 by injection molding.

[0113] It can be understood that the main body 311 is used as an insert so that at least a portion of the first portion 321 is fixed to the surface of the main body 311 through an injection molding process. At least a portion of the first portion 321 is an injection molding layer.

[0114] In some other embodiments, at least a portion of the first portion 321 is connected to the main body portion 311 by dipping.

[0115] It is understandable that the main body 311 can be immersed in the fluid composed of at least part of the first part 321, so that at least part of the first part 321 is covered on the surface of the main body 311 by immersion. At least part of the first part 321 is a plastic-impregnated layer.

[0116] In some further embodiments, at least a portion of the first portion 321 is coated on the main body 311 .

[0117] It can be understood that at least a portion of the first portion 321 is coated on the surface of the main body 311 by spraying, brushing, etc., so that at least a portion of the first portion 321 is a coating layer.

[0118] In some other embodiments, at least a portion of the first portion 321 is bonded to a surface of the main body 311 .

[0119] Such a configuration enables the first part 321 to be fixed to the surface of the main body 311 by at least one of extrusion, injection molding, dipping, coating, bonding, etc., thereby improving the flexibility of fixing the first part 321 on the main body 311.

[0120] As an example, the first part 321 is fixed to the surface of the body 311 by extrusion, injection molding, dipping, coating and bonding. As another example, the first part 321 can be divided into multiple parts, and at least two parts are fixed to the surface of the body 311 in different ways.

[0121] It should be noted that the first part 321 is covered on the surface of the main body 311 by extrusion. This arrangement can improve the coverage strength of the first part 321 on the surface of the main body 311, which helps to maintain the stability of the insulation between the battery 100 and the main body 311 by the first part 321. In addition, it also helps to improve the wear resistance of the insulating layer 32.

[0122] In some embodiments, the first end portion 312 and the second end portion 313 are fixed by welding.

[0123] By adopting the above technical solution, the metal belt 31 can be wrapped around the outer circumference of multiple battery cells 100, and then the first end 312 and the second end 313 can be welded and fixed, so that the bundling belt 30 can bundle the multiple battery cells 100. In this way, the bundling strength of the bundling belt 30 for the multiple battery cells 100 can be improved, so as to effectively improve the effect of resisting the expansion force of the battery cells 100.

[0124] In some embodiments, in order to improve the welding strength between the first end 312 and the second end 313 and to improve the bundling strength of the bundling belt 30 to the battery 100 , the first end 312 and the second end 313 may be butt-welded to achieve fixation.

[0125] In other embodiments, the first end portion 312 and the second end portion 313 may be penetration welded.

[0126] It should be supplemented here that, in some embodiments, during the process of providing the insulating layer 32 on the main body 311, the first end 312 and the second end 313 may also be provided with the insulating layer 32. Before the first end 312 and the second end 313 are subjected to penetration welding, the insulating layer 32 at the position where the first end 312 and the second end 313 are to be subjected to penetration welding may be peeled off, so as to facilitate the welding of the first end 312 and the second end 313. In other embodiments, the first end 312 and the second end 313 may not be provided with the insulating layer 32.

[0127] In some embodiments, please refer to Figure 6 and Figure 7 , and in combination with other drawings. Along the thickness direction of the metal strip 31 at the first end 312 , the first end 312 and the second end 313 are stacked.

[0128] It can be understood that the first end portion 312 and the second end portion 313 are stacked, and the thickness direction of the metal strip 31 at the first end portion 312 and the thickness direction of the metal strip 31 at the second end portion 313 are substantially parallel.

[0129] Such a configuration enables the first end portion 312 and the second end portion 313 to have a larger contact area, thereby helping to improve the connection strength between the first end portion 312 and the second end portion 313 , and further can improve the bundling strength of the bundling belt 30 to the battery 100 single body.

[0130] In addition, the first end portion 312 and the second end portion 313 are stacked, which facilitates butt welding of the first end portion 312 and the second end portion 313 and can improve the welding strength between the first end portion 312 and the second end portion 313 .

[0131] In some embodiments, please refer to Figure 6 and Figure 7 , and in combination with other drawings. The first end 312 is located between the battery 100 monomer and the second end 313. The insulating layer 32 also includes a second portion 322, at least part of which is disposed on a side of the first end 312 close to the battery 100 monomer.

[0132] The second portion 322 is a portion of the insulating layer 32 and has insulating properties.

[0133] At least part of the second portion 322 is disposed on the side of the first end portion 312 close to the battery 100 monomer, so as to achieve an insulation effect between the first end portion 312 and the battery 100 monomer. In this way, an insulating layer 32 is basically disposed between the metal strip 31 and the battery 100 monomer, so that the insulation between the metal strip 31 and the battery 100 monomer can be achieved in a relatively large range, so as to improve the insulation effect of the strapping tape 30.

[0134] In some embodiments, at least a portion of the second portion 322 is also disposed on a side of the second end portion 313 away from the first end portion 312 .

[0135] Such a configuration can also achieve insulation between the metal belt 31 and other conductive components except the battery 100 single body, thereby improving the problem of internal short circuit of the battery 100 and improving the reliability of the battery 100.

[0136] It should be supplemented here that, in some embodiments, in the process of providing the insulating layer 32 on the main body 311, the first end 312 and the second end 313 may also be provided with the insulating layer 32. The insulating layer 32 at the first end 312 and the second end 313 includes not only the second part 322, but also parts covering other positions. Before the first end 312 and the second end 313 are penetrated and welded, the insulating layer 32 at the first end 312 and the second end 313 except the second part 322 may be peeled off. Such a configuration facilitates welding of the first end 312 and the second end 313, and can achieve insulation between the first end 312 and the battery 100 monomer. In other embodiments, the insulating layer 32 at the first end 312 and the second end 313 may include only the second part 322.

[0137] At least a portion of the second portion 322 and the main body 311 may be connected in at least one of the following ways.

[0138] In some embodiments, at least a portion of the second portion 322 is extrusion-connected to at least one of the first end 312 and the second end 313 .

[0139] It can be understood that the extrusion can be performed by an extruder so that at least a portion of the second portion 322 covers the surface of at least one of the first end portion 312 and the second end portion 313. At least a portion of the second portion 322 is an extrusion layer.

[0140] In other embodiments, at least a portion of the second portion 322 is injection-molded and connected to at least one of the first end portion 312 and the second end portion 313 .

[0141] It can be understood that at least one of the first end 312 and the second end 313 is used as an insert so that at least part of the second portion 322 is fixed to the surface of at least one of the first end 312 and the second end 313 through an injection molding process. At least part of the second portion 322 is an injection molding layer.

[0142] In some further embodiments, at least a portion of the second portion 322 is connected to at least one of the first end portion 312 and the second end portion 313 by dip-molding.

[0143] It can be understood that at least one of the first end 312 and the second end 313 can be immersed in the fluid composed of at least part of the second part 322, so that at least part of the second part 322 is covered on the surface of at least one of the first end 312 and the second end 313 by immersion. At least part of the second part 322 is a plastic-dip layer.

[0144] In still other embodiments, at least a portion of the second portion 322 is coated on at least one of the first end portion 312 and the second end portion 313 .

[0145] It can be understood that at least a portion of the second portion 322 is coated on the surface of at least one of the first end portion 312 and the second end portion 313 by spraying, brushing, etc., so that at least a portion of the second portion 322 is a coating layer.

[0146] In some other embodiments, at least a portion of the second portion 322 is bonded to at least one of the first end portion 312 and the second end portion 313 .

[0147] Such a configuration enables the second part 322 to be fixed to the surface of at least one of the first end 312 and the second end 313 by at least one of extrusion, injection molding, dipping, coating, bonding, etc., thereby improving the fixing flexibility of the second part 322 on at least one of the first end 312 and the second end 313.

[0148] As an example, the second portion 322 is fixed to the surface of at least one of the first end portion 312 and the second end portion 313 by one of extrusion, injection molding, dipping, coating, and bonding. As another example, the second portion 322 can be divided into a plurality of parts, and at least two parts are fixed to the surface of at least one of the first end portion 312 and the second end portion 313 in different ways.

[0149] In some embodiments, the edge of the contact position between the first end portion 312 and the second end portion 313 is exposed outside the insulating layer 32 .

[0150] The edge of the contact position between the first end portion 312 and the second end portion 313 may be used for welding.

[0151] Such arrangement enables the edge of the contact position between the first end 312 and the second end 313 to be used for butt welding, thereby improving the welding strength between the first end 312 and the second end 313, and further improving the bundling strength of the bundling belt 30 to the battery 100.

[0152] In some embodiments, the metal strip 31 comprises a steel strip.

[0153] The material of the steel strip can be pure steel or steel alloy.

[0154] Such configuration enables the strapping belt 30 to have a higher structural strength, thereby improving the strapping strength of the strapping belt 30 on the battery 100 .

[0155] See also Figure 1, the electric device provided in the embodiment of the present application includes a battery 100. The battery 100 in this embodiment is the same as the battery 100 in the previous embodiment. For details, please refer to the relevant description of the battery 100 in the previous embodiment, which will not be repeated here.

[0156] The electrical device provided in the embodiment of the present application, by adopting the above-mentioned battery 100, can improve the wear resistance of the insulating layer 32 of the strapping belt 30, that is, improve the wear resistance of the strapping belt 30, which helps to improve the stability and durability of the insulation effect between the strapping belt 30 and the battery 100 cells, thereby improving the reliability of the battery 100 and thus improving the reliability of the electrical device.

[0157] As one of the embodiments of this application, Figure 4 and Figure 5 As shown, the battery 100 includes a strapping band 30 and a plurality of battery 100 cells, and the strapping band 30 includes a metal band 31 and an insulating layer 32. The metal band 31 surrounds the outer periphery of the plurality of battery 100 cells. The metal band 31 includes a body 311, a first end 312, and a second end 313, and the first end 312 and the second end 313 are respectively disposed at opposite ends of the body 311 and fixed by welding. The insulating layer 32 is covered on the surface of the body 311 by an extrusion process, and is partially located between the battery 100 cells and the body 311.

[0158] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: Multiple battery cells; The strapping belt comprises a metal belt and an insulating layer. The metal belt surrounds a plurality of battery cells. The insulating layer is arranged on the surface of the metal belt and is at least partially located between the metal belt and the battery cells.

2. The battery according to claim 1, characterized in that The insulating layer includes a nylon layer.

3. The battery according to claim 1 or 2, characterized in that: The metal belt comprises: A first wall and a second wall are arranged opposite to each other along a first direction; The third wall and the fourth wall are arranged opposite to each other along the second direction; A plurality of curved portions, wherein the curved portions are connected between the first wall and the third wall, between the first wall and the fourth wall, between the second wall and the third wall, and between the second wall and the fourth wall; Wherein, at least a portion of the insulating layer is disposed on surfaces of the first wall, the second wall, the third wall and the fourth wall; and the first direction intersects with the second direction.

4. The battery according to claim 3, characterized in that A portion of the insulating layer is disposed on a surface of the bent portion.

5. The battery according to any one of claims 1 to 3, characterized in that: The metal strip includes a main body, a first end, and a second end, wherein the first end and the second end are respectively arranged at opposite ends of the main body and fixedly connected; the insulating layer includes a first part, which is arranged on the surface of the main body and is at least partially located between the main body and the battery cell.

6. The battery according to claim 5, characterized in that At least a portion of the first portion is extrusion-connected to the main body portion; and / or, at least a portion of the first portion is injection-moldedly connected to the main body portion; and / or, at least part of the first portion is connected to the main body portion by plastic dip molding; and / or, at least part of the first portion is applied to the body portion; And / or, at least part of the first portion is bonded to the main body.

7. The battery according to claim 5 or 6, characterized in that: The first end portion and the second end portion are fixed by welding.

8. The battery according to any one of claims 5 to 7, characterized in that: The first end portion and the second end portion are stacked along a thickness direction of the metal strip at the first end portion.

9. The battery according to claim 8, characterized in that The first end is located between the battery cell and the second end; the insulating layer further includes a second portion, at least a portion of the second portion is disposed on a side of the first end close to the battery cell.

10. The battery according to claim 9, characterized in that At least part of the second portion is also disposed on a side of the second end away from the first end.

11. The battery according to claim 9 or 10, characterized in that: At least a portion of the second portion is extrusion-connected to the first end portion and / or the second end portion; and / or, at least part of the second portion is injection-moldedly connected to the first end portion and / or the second end portion; And / or, at least a portion of the second portion is connected to the first end portion and / or the second end portion by dip-molding; and / or, at least a portion of the second portion is applied to the first end portion and / or the second end portion; And / or, at least a portion of the second portion is bonded to the first end portion and / or the second end portion.

12. The battery according to any one of claims 8 to 11, characterized in that: An edge of a contact position between the first end portion and the second end portion is exposed outside the insulating layer.

13. The battery according to any one of claims 1 to 12, characterized in that: The metal strip comprises a steel strip.

14. An electrical device, characterized in that: Comprising a battery according to any one of claims 1-13.

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