Battery module and engineering machinery

Abstract

The invention provides a battery module and engineering machinery, the battery module comprises a battery cell assembly, an annular belt and a positioning structure, the battery cell assembly comprises a plurality of stacked battery cells; the ring belt is bound on the circumferential outer side of the battery cell assembly; and the positioning structure is positioned between the battery cell and the ring belt, and realizes insulation and positioning of the ring belt and the battery cell. Wherein the ring belt is bound on the outer side of the circumferential direction of the battery cell assembly, and the positioning structure is positioned between the battery cell and the ring belt, so that the insulation and the positioning of the ring belt and the battery cell are realized. Therefore, when the engineering machinery provided with the battery module moves under complex road conditions and generates strenuous movement, due to the arrangement of the ring belt and the positioning structure, the shaking of the battery cell can be slowed down or even avoided, so that the convergence aluminum bar is prevented from being broken, the battery cell is prevented from being damaged and losing efficacy, and the stability and the safety of the battery cell are improved.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a battery module and engineering machinery. Background Art

[0002] With the development of new energy technology, more and more construction machinery uses batteries as a power source. The battery module includes a battery cell assembly, and the battery cell assembly includes multiple stacked battery cells. When the construction machinery moves on complex road conditions, the construction machinery will vibrate violently, and the battery module inside the construction machinery will also shake. The battery cells in the battery module will shake, which may cause the busbar to break, or even the battery cell to break and fail, resulting in poor stability and safety of the battery cell. Summary of the invention

[0003] In view of this, the present application provides a battery module that solves the problem of poor stability and safety of the battery cell caused by the shaking of the battery cell. The present application also provides an engineering machine including the above-mentioned battery module.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A battery module, comprising:

[0006] A battery cell assembly, comprising a plurality of battery cells stacked in layers;

[0007] An annular belt, bound to the outer circumferential side of the battery cell assembly;

[0008] The positioning structure is located between the battery core and the ring belt, and realizes the insulation and positioning of the ring belt and the battery core.

[0009] Optionally, the positioning structure is arranged on the circumferential outer side of the battery cell assembly in the height direction around the battery cell assembly, and the annular belt is tied to the positioning structure.

[0010] Optionally, the positioning structure includes a plurality of positioning plates, the positioning plates are fixedly connected to the battery cells, and the positioning plates are provided with a first groove, and the annular belt is located in the first groove.

[0011] Optionally, the battery core includes a body and an insulating layer covering the body, the insulating layer has an opening that exposes a portion of a lateral end surface of the body, and the positioning plate is connected to and covers the portion.

[0012] Optionally, the positioning plate is provided on the lateral end surface of each of the battery cells, and in the stacking direction of the battery cells, the distance between adjacent positioning plates is D, wherein D satisfies D≤5 mm.

[0013] Optionally, the battery cell assembly further includes end plates arranged at both ends of the battery cell assembly in a stacking direction, the end plates are provided with a second groove, and the annular belt is located in the second groove.

[0014] Optionally, at least one limiting portion is provided on the groove wall of the first groove and / or the second groove, and the limiting portion is used to prevent the annular belt from escaping from the first groove and / or the second groove.

[0015] Optionally, the positioning structure includes a plurality of insulating adhesive layers located between the annular belt and the battery core.

[0016] Optionally, a plurality of the ring belts are distributed in the height direction of the battery core assembly, and all of the ring belts are bound to the positioning structure.

[0017] An engineering machine comprises the battery module described in any one of the above items.

[0018] The battery module provided by the present application is provided with a ring belt that is bound to the outer side of the cell assembly in the circumferential direction, and a positioning structure between the cell and the ring belt, so as to achieve insulation and positioning of the ring belt and the cell. In this way, when the engineering machinery equipped with the above-mentioned battery module moves violently in complex road conditions, the setting of the ring belt and the positioning structure can slow down or even prevent the shaking of the cell, so as to prevent the aluminum bus bar from breaking and the cell from breaking and failing, thereby improving the stability and safety of the cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of the battery module provided in this embodiment;

[0021] Figure 2 It is a schematic diagram of the structure of a battery cell and a positioning plate in one implementation mode;

[0022] Figure 3 is a structural schematic diagram of the end plate;

[0023] Figure 4 It is a schematic diagram of the structure of the battery cell;

[0024] Figure 5 It is a schematic diagram of the structure of a battery cell and a positioning plate in another implementation mode;

[0025] Figure 6It is a schematic diagram of the structure of the battery core, insulating rubber layer and ring belt;

[0026] Figure 7 for Figure 2 The enlarged view of point A in the middle;

[0027] Figure 8 for Figure 6 The enlarged view of point B in the middle;

[0028] Fig. 9 It is a schematic diagram of the structure of a battery cell and a positioning plate in another implementation manner.

[0029] exist Figure 1-Figure 9 middle:

[0030] 1-battery core assembly, 2-ring belt, 3-positioning structure;

[0031] 11-battery core, 12-end plate, 31-positioning plate, 32-insulating rubber layer;

[0032] 111 - body, 112 - insulation layer, 121 - second groove, 311 - first groove;

[0033] 3111-Limiting part. DETAILED DESCRIPTION

[0034] The present application also provides a battery module. The present application also provides an engineering machine including the battery module.

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] like Figure 1-Figure 9As shown, the embodiment of the present application provides a battery module that can be installed in engineering machinery. The battery module provides electrical energy for the engineering machinery, and then provides power for the engineering machinery operation. The battery module mainly includes a battery cell assembly 1, a ring belt 2 and a positioning structure 3. The battery cell assembly 1 includes a plurality of stacked battery cells 11; the ring belt 2 is bound to the circumferential outer side of the battery cell assembly 1; the positioning structure 3 is located between the battery cell 11 and the ring belt 2, and realizes the insulation and positioning of the ring belt 2 and the battery cell 11. Among them, the battery module is composed of a shell and at least one battery cell assembly 1 arranged in the shell. The battery cell assembly 1 is composed of a plurality of stacked battery cells 11. The ring belt 2 is arranged on the circumferential outer side of the stacked battery cells 11 and binds the battery cell assembly 1 together; and the positioning structure 3 is arranged between the battery cell 11 and the ring belt 2 to realize the positioning of the ring belt 2, so as to prevent the ring belt 2 arranged on the circumferential outer side of the battery cell assembly 1 from moving, thereby improving the binding effect of the ring belt 2 on the battery cell assembly 1. Moreover, the positioning structure 3 can achieve an insulated connection between the battery cell assembly 1 and the ring belt 2 , thereby improving the safety of the connection between the above structure and the battery cell 11 .

[0037] The positioning structure 3 is used to achieve an insulated connection between the ring belt 2 and the battery cell 11, so as to achieve positioning of the battery cell 11, so as to prevent the battery cell 11 from shaking when the engineering machinery on which the battery module is installed vibrates. For example, the positioning structure 3 can be an insulating rubber layer 32 or an insulating positioning plate.

[0038] It should be noted that the stacking direction of the battery cell 11 is Figure 1 The direction is indicated by the double-headed arrow X.

[0039] It should also be noted that the manner in which the ring belt 2 binds the battery cell assembly 1 is not limited herein. For example, the ring belt 2 may surround the battery cell assembly 1. Figure 1 The direction of the double-headed arrow Z is arranged on the circumferential outer side of the battery cell assembly 1; the ring belt 2 can also surround Figure 1 The direction of the double-headed arrow Y is arranged on the circumferential outer side of the battery cell assembly 1 .

[0040] Exemplarily, the endless belt 2 may be a steel belt structure, and the steel belt is insulated and connected to the battery cell assembly 1; of course, the endless belt 2 may be an insulating winding belt.

[0041] The battery module of the above structure is provided with a ring belt 2 bound to the outer side of the battery cell assembly 1, and a positioning structure 3 located between the battery cell 11 and the ring belt 2, so as to achieve insulation and positioning of the ring belt 2 and the battery cell 11. In this way, when the engineering machinery provided with the above battery module moves violently on complex road conditions, the setting of the ring belt 2 and the positioning structure 3 can slow down or even prevent the shaking of the battery cell 11, so as to prevent the busbar aluminum from breaking and the battery cell 11 from breaking and failing, thereby improving the stability and safety of the battery cell 11.

[0042] In some embodiments, the positioning structure 3 is arranged on the outer side of the circumference of the battery cell assembly 1 in the height direction around the battery cell assembly 1, and the ring belt 2 is tied to the positioning structure 3. In other words, the ring belt 2 is arranged on the outer side of the circumference of the battery cell assembly 1 in the height direction around the battery cell assembly 1. Figure 1 The direction indicated by the double-headed arrow Z. Since a structure such as a pole ear and a busbar is provided at one end of the battery cell 11 in the height direction, and a structure such as a liquid cooling plate for cooling the battery cell 11 is provided at the other end of the battery cell 11, but no other components are provided in the circumferential direction around the battery cell 11 in the height direction, by surrounding the annular belt 2 around the circumferential outer side of the battery cell assembly 1 in the height direction, the installation of the annular belt 2 can be facilitated, the interference between the annular belt 2 and the pole ear, busbar, liquid cooling plate and other components of the battery cell assembly 1 can be reduced, and the limiting effect of the annular belt 2 on the battery cell 11 can be improved, thereby improving the overall stability of the battery cell assembly 1.

[0043] In addition, the positioning structure 3 and the ring belt 2 can also be arranged in other ways, for example: the positioning structure 3 is arranged on the circumferential outer side of the battery cell assembly 1 around the length direction of the battery cell assembly 1, and the ring belt 2 is also tied to the positioning structure 3. Such an arrangement can also achieve the bundling and limiting of the battery cell 11, and prevent the battery cell 11 from shaking when the engineering machinery on which the battery module is set shakes.

[0044] In some embodiments, the positioning structure 3 includes a plurality of positioning plates 31, the positioning plates 31 are fixedly connected to the battery cell 11, and the positioning plates 31 are provided with a first groove 311, and the endless belt 2 is located in the first groove 311. Specifically, a plurality of positioning plates 31 are provided, and a positioning plate 31 is provided between each battery cell 11 and the endless belt 2, and the first groove 311 of the positioning plate 31 is used to achieve the positioning of the endless belt 2. By providing the positioning plate 31, and providing the first groove 311 on the positioning plate 31 to provide a placement position for the endless belt 2, the endless belt 2 can be easily installed in the first groove 311, thereby improving the installation efficiency of the endless belt 2. Furthermore, when the battery cell 11 is subjected to a force along the height direction of the battery cell assembly 1, the side wall of the first groove 311 abuts against the annular band 2, and the positioning plate 31 provided with the first groove 311 is connected to the battery cell 11, so that the annular band 2 will generate a blocking force to prevent the battery cell 11 from moving along the height direction of the battery cell assembly 1. This can prevent the battery cell 11 from moving out of the battery module when the engineering machinery equipped with the above-mentioned battery module shakes, thereby improving the stability of the overall structure of the battery module.

[0045] It should be noted that the corresponding forms of the positioning plate 31, the first groove 311 and the battery cell 11 are not limited here. Figure 2 As shown, the battery cell 11 can be arranged one-to-one with the positioning plate 31; Figure 5As shown, the battery cell 11 can also be arranged in a one-to-many manner on the positioning plate 31; accordingly, the number of the first grooves 11 arranged on the positioning plate 31 is not limited. Usually, the number of the first grooves 31 is the same as the number of the annular bands 2 bound to the circumferential outer side of the battery cell assembly 1.

[0046] In some embodiments, Figure 4 As shown, the battery cell 11 includes a body 111 and an insulating layer 112 covering the body 111. The insulating layer 112 is provided with an opening that exposes a portion of the lateral end surface of the body 111. The positioning plate 31 is connected to the portion and covers the portion. Specifically, the insulating layer 112 is coated on the outer side of the body 111 to achieve insulation between the body 111 of the battery cell 11 and other external components, thereby improving the safety of the battery cell 11 during use. If the positioning plate 31 is set on the insulating layer 112 of the battery cell 11, when the engineering machinery on which the battery module is set shakes, the battery cell 11 will also be subjected to shaking force, the insulating layer 112 may be torn, and the battery cell 11 will still move out of the battery cell assembly 1; in this embodiment, the positioning plate 31 is fixedly set on the body 111 of the battery cell 11, so that the stability of the connection between the battery cell 11 and the positioning plate 31 can be improved, so that when the engineering machinery on which the battery module is set shakes, the battery cell 11 can be prevented from moving out of the battery cell assembly 1, and the bundling effect of the battery cell assembly 1 can be further improved. Among them, the positioning plate 31 covers a part, that is, in the direction perpendicular to the plane where the part is located, the projection of the part is located within the projection of the positioning plate 31, so that on the basis of ensuring that the local connection between the positioning plate 31 and the body 111 improves the connection stability between the two, it is further ensured that the body 111 of the battery cell 11 is not exposed, so as to ensure the insulation of the battery cell 11, thereby improving the safety of the battery cell 11 when in use.

[0047] Exemplarily, the stacking direction of the battery cell 11 is Figure 1 In the direction indicated by the double-headed arrow X, the stacking direction of the battery cell 11 is the same as the width direction of the battery cell 11, and the height direction of the battery cell 11 is Figure 1 In the direction indicated by the double-headed arrow Z, the lateral end face of the body 111 is the end face of the side of the body 111 in the length direction of the body 111, and the length direction of the body 111 is Figure 1 The direction is indicated by the double-headed arrow Y.

[0048] In some embodiments, a positioning plate 31 is disposed on the lateral end surface of each battery cell 11, and in the stacking direction of the battery cells 11, the distance between adjacent positioning plates 31 is D, where D satisfies D≤5mm. Specifically, since the first groove 311 is provided on the positioning plate 31, and the first groove 311 provides an installation position for the ring belt 2, ensuring that the distance between adjacent positioning plates 31 is less than 5mm, the size of the ring belt 2 not disposed in the first groove 311 can be reduced, thereby improving the positioning effect of the first groove 311 on the ring belt 2, thereby improving the stability of the battery cells 11 in the battery cell assembly 1.

[0049] Illustratively, the distance D between adjacent positioning plates 31 may be 5 mm, 4.9 mm, 4.5 mm, 4 mm, 3 mm, 2 mm, 1 mm, 0.8 mm, 0.5 mm, 0.1 mm, and the like.

[0050] It should be noted that a positioning plate 31 is disposed on the lateral end surface of each battery cell 11, and the arrangement of the battery cell 11 and the positioning plate 31 is not limited herein. Figure 1 As shown, a positioning plate 31 can be provided on the lateral end surface of a battery cell 11, that is, the battery cell 11 and the positioning plate 31 are provided in a one-to-one correspondence, so that when a failure occurs in the subsequent battery cell 11, it is convenient to replace the battery cell 11; Figure 5 As shown, at least two positioning plates 31 may also be provided on the lateral end surface of a battery cell 11, that is, the battery cell 11 and the positioning plates 31 are provided in a one-to-many manner; Fig. 9 As shown, a positioning plate 31 can also cover the lateral end surfaces of at least two battery cells 11, that is, the battery cells 11 and the positioning plates 31 are arranged in a many-to-one manner. Such an arrangement can improve the stability of the at least two battery cells 11 connected to the positioning plate 31, further prevent the battery cells 11 from being displaced when the engineering machinery equipped with the above-mentioned battery module shakes, and further improve the stability of the battery cell assembly 1.

[0051] In some embodiments, the battery cell assembly 1 further includes an end plate 12 disposed at both ends of the battery cell assembly 1 in the stacking direction, the end plate 12 is provided with a second groove 121, and the annular belt 2 is located in the second groove 121. Specifically, by providing the end plate 12, it is possible to facilitate the annular belt 2 to be sleeved on the circumferential outer side of the battery cell assembly 1. By providing the second groove 121 on the end plate 12, it is possible to facilitate the installation of the annular belt 2, and to improve the stability of the installation of the annular belt 2 bound to the circumferential outer side of the battery cell assembly 1, thereby improving the stability of the overall structure of the battery cell assembly 1.

[0052] It should be noted that the end plate 12 is usually a non-insulating plate. In order to achieve an insulating connection between the annular belt 2 and the end plate 12 , a polymer insulating partition is usually provided on the side of the end plate 12 close to the annular belt to achieve an insulating connection between the end plate 12 and the annular belt 2 .

[0053] Furthermore, in the height direction of the battery cell assembly 1, the first groove 311 and the second groove 121 that provide installation positions for the same ring belt 2 have the same height. Such a configuration can facilitate the installation of the ring belt 2, and can also improve the structural strength of the ring belt 2 when the engineering machinery equipped with the battery module moves violently, thereby improving the limiting effect on the battery cell 11.

[0054] Furthermore, the adjacent end plates 12 and the battery cells 11, and the adjacent battery cells 11 are connected by a glue layer. This arrangement allows the battery cells 11 and the end plates 12 of the battery cell assembly 1 to form a whole, so that when the engineering machinery equipped with the battery module shakes, the stability of the battery cell assembly 1 is further improved. When a battery cell 11 of the battery cell assembly 1 has a tendency to shake, the battery cell 11 and / or the end plate 12 adjacent to the battery cell 11 will provide a blocking force for it, thereby further improving the stability of the battery cell assembly 1 structure.

[0055] In some embodiments, at least one limiting portion 3111 is provided on the groove wall of the first groove 311 and / or the second groove 121, and the limiting portion 3111 is used to prevent the endless belt 2 from escaping from the first groove 311 and / or the second groove 121. The endless belt 2 is located in the first groove 311 and the second groove 121, and the limiting portion 3111 can be provided to limit the endless belt 2, so that the endless belt 2 is stably arranged in the first groove 311 and the second groove 121, so as to prevent the endless belt 2 from escaping from the first groove 311 and the second groove 121, thereby improving the limiting effect of the endless belt 2 on the battery cell 11 in the battery cell assembly 1, and preventing the battery cell 11 from escaping from the battery cell assembly 1.

[0056] It should be noted that the number of the limiting parts 3111 in a first groove 311 or a second groove 121 is not limited here, and the limiting parts 3111 may be one, two, or more. When two limiting parts 3111 are provided, the limiting parts 3111 are provided on two opposite sides of the groove wall of the first groove 311 or the second groove 121.

[0057] Exemplarily, the limiting portion 3111 is a protrusion protruding from the groove wall of the first groove 311 and / or the second groove 121 into the groove.

[0058] In some embodiments, the positioning structure 3 includes a plurality of insulating adhesive layers 32 located between the ring belt 2 and the battery cell 11. That is to say, in this embodiment, the insulating connection between the ring belt 2 and the battery cell 11 is achieved by setting the insulating adhesive layer 32, and the convenience of connecting the ring belt 2 and the battery cell 11 can be improved by setting the insulating adhesive layer 32. Further, in order to improve the connection strength between the ring belt 2 and the battery cell 11, another opening is opened in the insulating layer 112 to expose another part of the lateral end surface of the body 111, and the part of the ring belt 2 is connected to the other part through the insulating adhesive layer 32, so that the connection strength between the ring belt 2 and the battery cell 11 can be improved, and the stability of the connection between the two can be improved, thereby improving the limiting effect of the ring belt 2 on the battery cell 11. Furthermore, the part where the ring belt 2 is connected to the battery cell 11 covers another part of the body 111 of the battery cell 11, so that while improving the connection strength between the ring belt 2 and the battery cell 11, the insulation between the body 111 and the outside can be achieved, and the safety performance of the battery cell 11 when in use can be improved.

[0059] Further, in some embodiments, multiple ring belts 2 are distributed in the height direction of the battery cell assembly 1, and all the ring belts 2 are tied to the positioning structure 3. That is to say, multiple ring belts 2 are arranged on the circumferential outer side of the battery cell assembly 1 around the direction of the battery cell assembly 1. By arranging more ring belts 2 on the circumferential outer side of the battery cell assembly 1, the limiting effect of the ring belts 2 on the battery cell assembly 1 can be further enhanced, and then when the engineering machinery equipped with the above-mentioned battery module is shaken, the battery cell 11 is further prevented from being moved out of the battery cell assembly 1.

[0060] Furthermore, the multiple ring belts 2 arranged on the outer side of the battery cell assembly 1 are arranged in parallel. With this arrangement, when the engineering machinery equipped with the above-mentioned battery module is shaken, the multiple parallel ring belts 2 can apply the same direction of blocking force to the battery cell 11 at the same time. With this arrangement, the blocking force applied by the multiple ring belts 2 to the battery cell 11 can be uniform, which can enhance the effect of preventing the displacement of the battery cell 11 and further enhance the limiting effect of the battery cell 11.

[0061] A construction machine includes a battery module. Since the construction machine includes the battery module, the beneficial effects of the construction machine brought by the battery module can be seen in the above content and will not be repeated here.

[0062] Exemplarily, the engineering machinery may be an excavator, an earth-moving machine, a lifting machine, a compacting machine, a pile-driving machine, a reinforced concrete machine, a road-surface machine, a rock-drilling machine, or other engineering machinery equipped with a battery module.

[0063] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0064] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0065] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0066] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0067] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0068] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A battery module, characterized in that: include: A battery cell assembly, comprising a plurality of stacked battery cells; An annular belt, bound to the outer circumferential side of the battery cell assembly; The positioning structure is located between the battery core and the ring belt, and realizes the insulation and positioning of the ring belt and the battery core.

2. The battery module according to claim 1, characterized in that: The positioning structure is arranged on the circumferential outer side of the battery core assembly in the height direction around the battery core assembly, and the annular belt is bound on the positioning structure.

3. The battery module according to claim 1, characterized in that: The positioning structure includes a plurality of positioning plates, the positioning plates are fixedly connected to the battery cores, and the positioning plates are provided with a first groove, and the annular belt is located in the first groove.

4. The battery module according to claim 3, characterized in that: The battery core includes a body and an insulating layer covering the body, the insulating layer is provided with an opening to expose a part of the lateral end surface of the body, and the positioning plate is connected to and covers the part.

5. The battery module according to claim 4, characterized in that: The positioning plate is disposed on the lateral end surface of each of the battery cells, and in the stacking direction of the battery cells, the distance between adjacent positioning plates is D, wherein D satisfies D≤5 mm.

6. The battery module according to claim 3, characterized in that: The battery cell assembly also includes end plates arranged at both ends of the battery cell assembly in a stacking direction, the end plates are provided with a second groove, and the annular belt is located in the second groove.

7. The battery module according to claim 6, characterized in that: At least one limiting portion is disposed on the groove wall of the first groove and / or the second groove, and the limiting portion is used to prevent the annular belt from escaping from the first groove and / or the second groove.

8. The battery module according to claim 1, characterized in that: The positioning structure includes a plurality of insulating adhesive layers located between the annular belt and the battery core.

9. The battery module according to claim 2, characterized in that: In the height direction of the battery core assembly, a plurality of the ring belts are distributed, and all the ring belts are bound to the positioning structure.

10. An engineering machine, characterized in that: A battery module comprising any one of claims 1 to 9.

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