Binding belt and battery module

Abstract

The utility model relates to the technical field of battery assembly, in particular to a binding belt and a battery module. The binding belt comprises a binding belt body and a telescopic structure, the binding belt body is used for binding a battery and an end plate, the telescopic structure can stretch out and draw back in the preset direction, at least two ends of the telescopic structure in the preset direction are respectively connected with the binding belt body, and / or two ends of the telescopic structure in the preset direction are respectively connected with the binding belt body and the end plate. The telescoping structure is configured to increase the length of the strap body. When the bridle body is bundled on the periphery of the battery and the end plate, if the battery expands, expansion force generated by expansion of the battery can drive the telescopic structure to stretch out and draw back in the preset direction, the length of the bridle body is increased, then the bridle body is prevented from being broken due to expansion of the battery, protection on the bridle body is improved, and the service life of the bridle body is prolonged. Therefore, the service life and the use safety of the bundled and assembled battery module are ensured. The service life and the use safety of the battery module can be ensured by applying the binding belt.

Description

Technical Field

[0001] The utility model relates to the technical field of battery assembly, in particular to a binding belt and a battery module. Background Art

[0002] In order to improve the utilization efficiency of batteries, multiple batteries are usually combined into a battery module. In the process of assembling batteries into battery modules, there are mainly two groups of assembly methods. The first is to set up an additional accommodating shell and assemble multiple batteries into the accommodating shell to form a battery module. This form causes the battery module to occupy more space and increase its own weight. Another method is to use a bundling method to bundle multiple batteries together to form a battery module, because the bundling method can effectively reduce the weight of the battery module. The bundling method has become the main assembly method of battery modules.

[0003] In the related art, the way to bundle batteries is usually to tighten the bundle once. In actual application, due to the over-tightening of the battery module assembly process, the batteries in the battery module will swell after long-term use. The continuous increase in the expansion force will cause the strap to break under stress, which will not only affect the service life of the battery module, but also cause greater safety hazards.

[0004] Therefore, there is an urgent need to invent a strapping belt and a battery module to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a strapping belt and a battery module, which can automatically adjust the length of the strapping belt according to the expansion of the battery in the battery module, thereby ensuring the strapping effect on the battery and improving the service life and safety of the battery module.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Tie straps, including:

[0008] A strap body for bundling the battery and the end plate; and

[0009] A telescopic structure, wherein the telescopic structure can be telescoped along a preset direction, wherein at least two ends of the telescopic structure along the preset direction are respectively connected and fixed to the strap body; and / or the two ends of the telescopic structure along the preset direction are respectively connected and fixed to the strap body and the end plate, and the telescopic structure is configured to increase the length of the strap body.

[0010] As an optional solution, the telescopic structure includes:

[0011] a telescopic member, the telescopic member being capable of extending and retracting along the preset direction; and

[0012] Flanged fixing parts are provided at both ends of the telescopic part along the preset direction, and the flanging fixing parts are configured to be connected and fixed to the belt body or the end plate.

[0013] As an optional solution, the telescopic part is arranged on a side of the strap body away from the battery, the telescopic part protrudes in a direction away from the battery, the telescopic part has plasticity, the inner surface of the telescopic part is bonded and fixed to the outer surface of the strap body, the inner surface of the telescopic part is the surface of the telescopic part close to the battery, and the outer surface of the strap body is the surface of the strap body away from the battery.

[0014] As an optional solution, the telescopic part is arranged on a side of the strap body close to the battery, the telescopic part protrudes in a direction away from the battery, the telescopic part has plasticity, the outer surface of the telescopic part abuts against the inner surface of the strap body, the outer surface of the telescopic part is the surface of the telescopic part away from the battery, and the inner surface of the strap body is the surface of the strap body close to the battery.

[0015] As an optional solution, it is characterized in that the telescopic member protrudes outward in the shape of a parabola, a sine curve, a cosine curve or a polygon.

[0016] As an optional solution, the telescopic member is elastic, hooks are respectively provided at both ends of the telescopic member along the preset direction, a hanging hole is provided on the flange fixing member, and the hook is hung and fixed with the hanging hole.

[0017] As an optional solution, the telescopic structure further includes:

[0018] A locking piece, each of the flange fixing pieces is arranged corresponding to at least one of the locking pieces, and the locking piece can be passed through and fixed to the flange fixing piece and the strap body in sequence.

[0019] As an optional solution, a mounting groove is provided on the end plate, and one end of the flange fixing piece is connected and fixed to the mounting groove.

[0020] As an optional solution, a plurality of the telescopic structures are provided in the strapping belt, and the plurality of the telescopic structures are arranged at intervals on the strapping belt body.

[0021] A battery module comprises a bus, the battery, the end plate and the binding belt as described above, wherein the multiple batteries are arranged in sequence along the preset direction, the bus is used to connect the multiple batteries in series and / or in parallel, the end plates are provided at both ends of the multiple batteries along the preset direction, and the binding belt is used to bind and fix the multiple batteries and the end plates.

[0022] Beneficial effects of the utility model:

[0023] The strapping belt provided by the utility model is provided with a telescopic structure that can be extended and retracted along a preset direction, and at least two ends of the telescopic structure along the preset direction are respectively connected to the strap body, and / or are respectively connected to the end plate and the strap body. When the strap body is bundled around the periphery of the battery and the end plate, if the battery expands, the expansion force generated by the battery expansion will drive the telescopic structure to extend and retract along the preset direction, thereby increasing the length of the strap body, thereby preventing the strap body from breaking due to the battery expansion, improving the protection of the strap body, and thereby ensuring the service life and safety of the bundled battery module.

[0024] This embodiment also provides a battery module, which, by being applied to the above-mentioned strapping belt, can increase the length of the strapping belt body through a telescopic structure, thereby preventing the strapping belt body from breaking due to battery expansion, improving protection of the strapping belt body, and thereby ensuring the service life and safety of the bundled battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the binding belt, battery and end plate provided in the first embodiment of the utility model;

[0026] Figure 2 It is a top view of the strapping belt, battery and end plate provided in the first embodiment of the utility model;

[0027] Figure 3 This is one of the structural schematic diagrams of the binding belt provided in the first embodiment of the utility model;

[0028] Figure 4 It is a top view of the binding belt provided in the first embodiment of the utility model;

[0029] Figure 5 This is the second structural schematic diagram of the binding belt provided in the first embodiment of the utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the strapping belt, the battery and the end plate provided in the second embodiment of the present utility model;

[0031] Figure 7 It is a top view of the strapping belt, battery and end plate provided in the second embodiment of the utility model;

[0032] Figure 8 It is a schematic diagram of the structure of the binding belt provided in the second embodiment of the utility model;

[0033] Fig. 9 It is a top view of the binding belt provided in the second embodiment of the utility model;

[0034] Fig.10 It is a cross-sectional schematic diagram of the binding belt and the end plate provided in the third embodiment of the present utility model;

[0035] Fig.11 It is a cross-sectional schematic diagram of the binding belt and the end plate provided in the fourth embodiment of the utility model;

[0036] Fig.12 This is a schematic diagram of the structure of the strapping belt, battery and end plate provided in the fifth embodiment of the present utility model;

[0037] Fig.13 It is a top view of the strapping belt, battery and end plate provided in the fifth embodiment of the present utility model;

[0038] Fig.14 This is a schematic diagram of the structure of the binding belt provided in the fifth embodiment of the present utility model;

[0039] Fig.15 It is a top view of the binding belt provided in the fifth embodiment of the utility model;

[0040] Fig.16 It is a cross-sectional schematic diagram of the binding belt and the end plate provided in the sixth embodiment of the present utility model.

[0041] In the figure:

[0042] 100. Tie straps;

[0043] 110, strap body; 120, telescopic structure; 121, telescopic member; 1211, hook; 122, flange fixing member; 1221, hanging hole; 1222, fixed body; 1223, flange extension; 123, locking member;

[0044] 200. Battery;

[0045] 300, end plate; 310, mounting groove. DETAILED DESCRIPTION

[0046] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0050] Embodiment 1

[0051] During the assembly process of the battery module, a plurality of batteries are bundled together using a strap to form a battery module. This method has been widely used due to its advantage of being able to effectively reduce the weight of the battery module.

[0052] In the related art, the way to bundle batteries is usually to tighten the bundle once. In actual application, due to the over-tightening of the battery module assembly process, the batteries in the battery module will swell after long-term use. The continuous increase in the expansion force will cause the strap to break under stress, which will not only affect the service life of the battery module, but also cause greater safety hazards.

[0053] In order to solve the above problems, Figure 1 to Figure 4 As shown, this embodiment provides a strapping belt 100. The strapping belt 100 includes a strap body 110 and a telescopic structure 120, wherein the telescopic structure 120 can be telescoped along a preset direction, and at least two ends of the telescopic structure 120 along the preset direction are respectively connected and fixed to the strap body 110; the telescopic structure 120 is configured to increase the length of the strap body 110.

[0054] The strapping belt 100 is provided with a telescopic structure 120 that can be telescoped in a preset direction, and at least two ends of the telescopic structure 120 in the preset direction are respectively connected to the strap body 110. When the strap body 110 is bundled around the periphery of the battery 200 and the end plate 300, if the battery 200 expands, the expansion force generated by the expansion of the battery 200 will drive the telescopic structure 120 to expand and contract in the preset direction, thereby increasing the length of the strap body 110, thereby preventing the strap body 110 from breaking due to the expansion of the battery 200, improving the protection of the strap body 110, and thereby ensuring the service life and safety of the bundled battery module.

[0055] It should be noted that, in this embodiment, Figure 3 and Figure 4 As shown, multiple batteries 200 are arranged in the front-to-back direction. When the battery 200 expands, the expansion degree of the battery 200 in the front-to-back direction is the largest. Therefore, the telescopic structure 120 is arranged on the portion of the strap body 110 extending in the front-to-back direction, and the telescopic structure 120 is stretched in the front-to-back direction. In other embodiments, the arrangement direction of the battery 200 can be adjusted according to actual needs, and the telescopic direction of the telescopic structure 120 can be adaptively adjusted. This embodiment does not make specific limitations.

[0056] As an optional solution, the strap body 110 is made of metal, plastic or basalt fiber material, and the high strength of metal, plastic or basalt fiber material is used to achieve stable bundling of the battery 200. It should be noted that in this embodiment, the strap body 110 is preferably made of basalt fiber material, and the diameter of the single filament of the selected basalt fiber material is between 9μm and 16μm, and the number of the basalt fiber material after plying is 2400tex to 4800tex. The breaking strength of the strap body 110 made of the basalt fiber material can reach more than 2000Mpa, and its breaking strength is much greater than the breaking strength of the strap body 110 made of metal material or the strap body 110 made of plastic. In addition, the basalt fiber material has good insulation and fire resistance. The strap body 110 made of metal material needs to be coated with insulating material, and the strap body 110 made of plastic material needs to add flame retardant, while the strap body 110 made of basalt fiber material does not need to perform the above operation, which simplifies the production steps and reduces the production cost.

[0057] In an optional solution, the telescopic structure 120 includes a telescopic member 121 and a flange fixing member 122, wherein the telescopic member 121 can be telescoped in the front-to-back direction, and both ends of the telescopic member 121 in the front-to-back direction are provided with flange fixing members 122, and the flange fixing members 122 are configured to be connected and fixed with the belt body 110. By providing the flange fixing members 122 at the front and rear ends of the telescopic member 121 that can be telescoped in the front-to-back direction, and using the flange fixing members 122 to be connected and fixed with the belt body 110, the structure is simple and the design is ingenious.

[0058] Specifically, if Figure 5 As shown, the flanged fixing member 122 includes a fixed main body portion 1222 and a flanged extension portion 1223, wherein the fixed main body portion 1222 is connected to the telescopic member 121, the flanged extension portion 1223 is arranged on the fixed main body portion 1222, the fixed main body portion 1222 is arranged at one end of the strap main body 110, the flanged extension portion 1223 extends outward and is folded to the end of the strap main body 110 away from the fixed main body portion 1222, the flanged extension portion 1223 and the fixed main body portion 1222 are clamped and fixed on the strap main body 110 together, the structure is simple, and the fixing is convenient.

[0059] In this embodiment, if Figure 1 to Figure 4 As shown, the telescopic member 121 and the fixed main body portion 1222 are arranged on the side of the strap body 110 away from the battery 200, the telescopic member 121 protrudes in the direction away from the battery 200, the telescopic member 121 has plasticity, and the inner surface of the telescopic member 121 is bonded and fixed to the outer surface of the strap body 110, the inner surface of the telescopic member 121 is the surface of the telescopic member 121 close to the battery 200, and the outer surface of the strap body 110 is the surface of the strap body 110 away from the battery 200. By arranging the telescopic member 121 and the fixed main body 1222 on the side of the strap main body 110 away from the battery 200, and arranging a protrusion on the telescopic member 121 facing away from the battery 200, the telescopic member 121 is ensured to have plasticity, and the surface of the telescopic member 121 close to the battery 200 is bonded and fixed to the surface of the strap main body 110 away from the battery 200. When the battery 200 expands in the front-to-back direction, the protrusion on the telescopic member 121 will be subjected to a pulling force in the front-to-back direction and the telescopic member 121 will be flattened in the front-to-back direction, and in the process of the protrusion being flattened, the strap main body 110 bonded and fixed to the surface of the protrusion close to the battery 200 will be flattened along with the protrusion, or the strap main body 110 will first detach from the protrusion and be flattened before the protrusion is flattened, so as to increase the length of the strap main body 110 and adapt to the expansion of the battery 200.

[0060] It should be noted that, in the present embodiment, the telescopic member 121 is made of metal aluminum, which has good ductility and is easily processed into thin sheets, and the aluminum sheet is easy to be bent and flattened. In other embodiments, the telescopic member 121 may also be made of other materials, as long as the telescopic member 121 has plasticity, which is not specifically limited in the present embodiment.

[0061] As an optional solution, the telescopic member 121 is convex outward in the shape of a parabola, a sine curve, a cosine curve or a polygon. It should be noted that in the present embodiment, the telescopic member 121 is convex outward in the shape of a parabola. In other embodiments, the telescopic member 121 may also be convex outward in the shape of a sine curve, a cosine curve, or other polygons, which are not specifically limited in the present embodiment.

[0062] In addition, in order to further improve the applicability of the strapping band 100, a plurality of telescopic structures 120 are provided in the strapping band 100, and the plurality of telescopic structures 120 are arranged at intervals on the strap body 110. By providing a plurality of telescopic structures 120 on the strap body 110, the maximum length of the strapping band 100 can be further increased, so that the strapping band 100 can be applied to batteries 200 with a greater degree of expansion.

[0063] Embodiment 2

[0064] This embodiment provides a binding belt 100. The specific structure of the binding belt 100 provided in this embodiment is basically the same as that of the first embodiment, and the specific structure of the binding belt 100 provided in this embodiment is different from that of the first embodiment in that the retractable member 121 is fixed to the binding belt body 110 in a different manner.

[0065] Specifically, if Figure 6 to Figure 9 As shown, the telescopic member 121 and the fixed main body 1222 are arranged on the side of the strap body 110 close to the battery 200, the telescopic member 121 protrudes in the direction away from the battery 200, the telescopic member 121 has plasticity, the outer surface of the telescopic member 121 abuts against the inner surface of the strap body 110, the outer surface of the telescopic member 121 is the surface of the telescopic member 121 away from the battery 200, and the inner surface of the strap body 110 is the surface of the strap body 110 close to the battery 200. By arranging the telescopic member 121 and the fixed main body 1222 on the side of the strap body 110 close to the battery 200, when the telescopic member 121 protrudes in the direction away from the battery 200, the protrusion can naturally drive the strap body 110 located at the surface of the protrusion away from the battery 200 to move in the direction away from the battery 200, and there is no need to use an adhesive to bond and fix the strap body 110 and the telescopic member 121, thereby further simplifying the structure of the strap 100.

[0066] Embodiment 3

[0067] This embodiment provides a binding belt 100. The specific structure of the binding belt 100 provided in this embodiment is basically the same as that of the first embodiment, and the specific structure of the binding belt 100 provided in this embodiment is different from that of the first embodiment in that the telescopic structure 120 is arranged at a different position.

[0068] Specifically, if Fig.10As shown, the flanged fixing members 122 at both ends of the telescopic structure 120 in the front-to-back direction are respectively connected and fixed to the end plate 300 and the strap body 110, and a mounting groove 310 is provided on the end plate 300, and one end of the flanged fixing member 122 is connected and fixed to the mounting groove 310. By providing the mounting groove 310 on the end plate 300, the two flanged fixing members 122 are respectively connected and fixed to the mounting groove 310 and the strap body 110, when the battery 200 expands in the front-to-back direction, the battery 200 drives the end plates 300 at both ends in the front-to-back direction to move in the front-to-back direction, thereby stretching the telescopic structure 120 used to connect the strap body 110 and the end plate 300.

[0069] Embodiment 4

[0070] This embodiment provides a binding belt 100. The specific structure of the binding belt 100 provided in this embodiment is basically the same as that of the third embodiment, and the specific structure of the binding belt 100 provided in this embodiment is different from that of the third embodiment in that the specific structure of the binding belt body 110 is different.

[0071] Specifically, if Fig.11 As shown, the strap body 110 is ring-shaped, and the flange fixing piece 122 at one end of the telescopic structure 120 is connected and fixed to the inner surface of the strap body 110 close to the battery 200, and the flange fixing piece 122 at the other end of the telescopic structure 120 is connected and fixed to the mounting groove 310 in the end plate 300, which can further improve the bundling effect of the battery 200.

[0072] Embodiment 5

[0073] This embodiment provides a binding belt 100. The specific structure of the binding belt 100 provided in this embodiment is basically the same as that of the first embodiment, and the specific structure of the binding belt 100 provided in this embodiment is different from that of the first embodiment in that the specific structure of the telescopic member 121 is different.

[0074] Specifically, if Figure 12 to Figure 15As shown, the telescopic member 121 is elastic, and hooks 1211 are respectively provided at both ends of the telescopic member 121 in a preset direction, and a hanging hole 1221 is provided on the flange fixing member 122, and the hooks 1211 are hung and fixed with the hanging holes 1221. By setting the telescopic member 121 to have an elastic structure, and setting hooks 1211 at both ends of the telescopic member 121 in the front-to-back direction, and opening the hanging hole 1221 on the flange fixing member 122, the connection and fixation of the telescopic member 121 and the flange fixing member 122 are achieved by hanging and fixing the hooks 1211 with the hanging holes 1221. When the battery 200 expands in the front-to-back direction, the telescopic member 121 is stretched by force to prevent the strap body 110 from breaking, and the telescopic member 121 in the stretched state will also shrink and reset under the action of its own elastic force, thereby driving the strap body 110 to firmly bundle the batteries 200 together, thereby improving the bundling effect of the batteries 200.

[0075] It should be noted that, in this embodiment, the telescopic member 121 is a spring, which has a simple structure and is easy to disassemble and assemble. In other embodiments, the telescopic member 121 may also be other elastic structures, which is not specifically limited in this embodiment.

[0076] In order to further improve the fixing effect between the flange fixing piece 122 and the belt body 110, the telescopic structure 120 also includes a locking piece 123, wherein each flange fixing piece 122 is correspondingly arranged with at least one locking piece 123, and the locking piece 123 can be passed through and fixed to the belt body 110 and the flange fixing piece 122 in sequence.

[0077] Specifically, in this embodiment, the locking member 123 is a rivet, which is riveted and fixed on the strap body 110 and the flange fixing member 122, with a simple structure and good fixing effect. In other embodiments, the locking member 123 can also be a bolt, nut or other structure that can be fixed, which is not specifically limited in this embodiment.

[0078] It can be understood that the locking member 123 provided in this embodiment is also applicable to the other embodiments mentioned above, and will not be described in detail here.

[0079] Embodiment 6

[0080] This embodiment provides a binding belt 100. The specific structure of the binding belt 100 provided in this embodiment is basically the same as that of the first embodiment, and the specific structure of the binding belt 100 provided in this embodiment is different from that of the first embodiment in that the binding belt 100 provided in this embodiment is a combination of the first embodiment and the third embodiment.

[0081] Specifically, if Fig.16As shown, the strapping belt 100 includes a strap body 110 and a plurality of telescopic structures 120, wherein at least two ends of some of the plurality of telescopic structures 120 along the front-to-back direction are respectively connected and fixed to the strap body 110; the flange fixing members 122 at both ends of the remaining telescopic structures 120 along the front-to-back direction are respectively connected and fixed to the end plate 300 and the strap body 110, so as to further improve the protection of the strap body 110, thereby ensuring the service life and safety of the bundled battery module.

[0082] Embodiment 7

[0083] This embodiment provides a battery module. The battery module includes a busbar, a battery 200, an end plate 300, and a binding belt 100 provided in any of the above embodiments. The multiple batteries 200 are arranged in sequence along the front-to-back direction. The busbar is used to connect the multiple batteries 200 in series and / or in parallel. The multiple batteries 200 are provided with end plates 300 at both ends along the front-to-back direction. The binding belt 100 is used to bind and fix the multiple batteries 200 and the end plates 300. The battery module, by being applied to the binding belt 100 provided in any of the above embodiments, can increase the length of the binding belt body 110 through the telescopic structure 120, thereby preventing the binding belt body 110 from breaking due to the expansion of the battery 200, improving the protection of the binding belt body 110, and thereby ensuring the service life and safety of the bundled battery module.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A strapping belt, characterized in that: include: A strap body (110) for bundling the battery (200) and the end plate (300); as well as A telescopic structure (120), wherein the telescopic structure (120) is capable of telescoping along a preset direction, and the strap body (110) is respectively connected and fixed to at least two ends of the telescopic structure (120) along the preset direction; and / or the strap body (110) and the end plate (300) are respectively connected and fixed to the two ends of the telescopic structure (120) along the preset direction, and the telescopic structure (120) is configured to increase the length of the strap body (110); In a state where the band body (110) and the telescopic structure (120) are bound around the battery (200) and the outer periphery of the end plate (300), the telescopic structure (120) can be stretched following the expansion of the battery (200).

2. The strapping belt according to claim 1, characterized in that: The telescopic structure (120) comprises: a telescopic member (121), wherein the telescopic member (121) is capable of telescoping along the preset direction; and A flange fixing member (122), wherein the two ends of the telescopic member (121) along the preset direction are provided with the flange fixing member (122), and the flange fixing member (122) is configured to be connected and fixed to the strap body (110) or the end plate (300).

3. The strapping belt according to claim 2, characterized in that: The telescopic member (121) is arranged on a side of the strap body (110) away from the battery (200), the telescopic member (121) protrudes in a direction away from the battery (200), the telescopic member (121) has plasticity, the inner surface of the telescopic member (121) is bonded and fixed to the outer surface of the strap body (110), the inner surface of the telescopic member (121) is the surface of the telescopic member (121) close to the battery (200), and the outer surface of the strap body (110) is the surface of the strap body (110) away from the battery (200).

4. The strapping belt according to claim 2, characterized in that: The telescopic member (121) is arranged on a side of the strap body (110) close to the battery (200), the telescopic member (121) protrudes in a direction away from the battery (200), the telescopic member (121) has plasticity, the outer surface of the telescopic member (121) abuts against the inner surface of the strap body (110), the outer surface of the telescopic member (121) is the surface of the telescopic member (121) away from the battery (200), and the inner surface of the strap body (110) is the surface of the strap body (110) close to the battery (200).

5. The binding belt according to claim 3 or claim 4, characterized in that: The telescopic member (121) is convex outwards in the shape of a parabola, a sine curve, a cosine curve or a polygon.

6. The strapping belt according to claim 2, characterized in that: The telescopic member (121) is elastic, and hooks (1211) are respectively arranged at both ends of the telescopic member (121) along the preset direction. A hanging hole (1221) is provided on the flange fixing member (122), and the hook (1211) is hung and fixed to the hanging hole (1221).

7. The strapping belt according to claim 2, characterized in that: The telescopic structure (120) further comprises: A locking member (123), each of the flange fixing members (122) is arranged corresponding to at least one of the locking members (123), and the locking members (123) can be sequentially passed through and fixed to the flange fixing member (122) and the strap body (110).

8. The strapping belt according to claim 2, characterized in that: The end plate (300) is provided with a mounting groove (310), and one end of the flange fixing member (122) is connected and fixed to the mounting groove (310).

9. The strapping belt according to claim 1, characterized in that: A plurality of the telescopic structures (120) are arranged in the binding belt, and the plurality of the telescopic structures (120) are arranged at intervals on the binding belt body (110).

10. A battery module, characterized in that: It comprises a bus, the battery (200), the end plate (300) and the binding belt according to any one of claims 1 to 9, wherein the plurality of batteries (200) are arranged in sequence along the preset direction, the bus is used to connect the plurality of batteries (200) in series and / or in parallel, the end plates (300) are provided at both ends of the plurality of batteries (200) along the preset direction, and the binding belt is used to bind and fix the plurality of batteries (200) and the end plates (300).

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