Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack. The battery module comprises: an end plate; the at least two battery cell tabs are positioned on one side of the end plate along the thickness direction of the end plate; at least one part of the output pole piece and the battery cell tab are arranged on the same side of the end plate, and the output pole piece comprises an output part; the blister insulation structure is insulated and separated between the end plate and the battery cell tab; and the output electrode insulation structure is insulated and separated between the end plate and the output part. According to the battery module and the battery pack provided by the invention, at least the plastic uptake insulation structure is designed into the plastic uptake part formed by the plastic uptake process, and the thickness of the plastic uptake insulation structure can be designed to be relatively thin. Compared with an injection molding part, the material consumption of the plastic uptake insulation structure can be greatly reduced, and the preparation cost can be effectively reduced.

Description

Technical Field

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

[0002] In the battery system of new energy vehicles, a battery module structure includes a battery cell and a metal frame surrounding the battery cell. Usually, an insulating member is set inside the metal frame (the side of the metal frame facing the battery cell) to provide insulation protection between the metal frame and the battery cell tabs. At the same time, the insulating member can also ensure the electrical safety of the metal frame and the high-voltage output pole.

[0003] In the related art, the above-mentioned insulating parts are usually injection-molded parts prepared by the injection molding process. However, the injection molding process determines that the thickness of the injection-molded parts is relatively thick, more materials are used, and the material cost is relatively high. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a battery module and a battery pack.

[0005] Based on the above-mentioned purpose, the first aspect of the present application provides a battery module, including: an end plate; at least two battery cell tabs, located on one side of the end plate along the thickness direction of the end plate; an output pole piece, at least a portion of the output pole piece and the battery cell tab are arranged on the same side of the end plate, and the output pole piece includes an output part; a blister insulation structure, an insulating partition between the end plate and the battery cell tab; an output pole insulation structure, an insulating partition between the end plate and the output part.

[0006] Optionally, along the thickness direction of the end plate, the orthographic projection of the vacuum absorbing insulation structure on the battery cell tab covers all of the battery cell tab.

[0007] Optionally, along the height direction of the end plate, the upper surface of the output pole insulation structure is not lower than the lower surface of the output part.

[0008] Optionally, the output pole insulation structure is a vacuum forming structure.

[0009] Optionally, a protruding structure is formed on the side wall of the vacuum-molded insulating structure facing the end plate, and the protruding structure is configured as the output pole insulating structure.

[0010] Optionally, the output pole insulation structure is an injection molded structure.

[0011] Optionally, the output pole insulation structure is fixedly connected or detachably connected to the end plate.

[0012] Optionally, the end plate is provided with a plug-in structure, and the output pole insulation structure is plug-in-matched with the end plate through the plug-in structure.

[0013] Optionally, the output pole insulation structure is located above the edge of the end plate.

[0014] Optionally, along the thickness direction of the end plate, the end of the output portion does not protrude outwardly from the outer side wall of the output pole insulation structure.

[0015] Based on the same inventive concept, the second aspect of the present application also provides a battery pack, comprising the battery module as described in the first aspect.

[0016] From the above description, it can be seen that the battery module and battery pack provided by the present application at least design the blister insulation structure as a blister part formed by a blister process, so that the thickness of the blister insulation structure can be designed to be thinner. Compared with the injection molded part formed by the injection molding process, the amount of material used in the blister insulation structure will be greatly reduced, which can effectively reduce the preparation cost.

[0017] In addition, the output pole insulation structure is used to ensure that there is a creepage distance and electrical clearance between the end plate and the output part of the output pole piece that meet the design requirements, which helps to ensure the electrical safety of the end plate and the output pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are 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 these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of an explosion of an existing battery module;

[0020] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0021] Figure 3 is a schematic diagram of an existing battery module;

[0022] Figure 4 An exploded schematic diagram of a battery module of the first structure according to an embodiment of the present application;

[0023] Figure 5 A schematic diagram of a battery module of a first structure according to an embodiment of the present application;

[0024] Figure 6 A front view schematic diagram of a blister insulation structure and an end plate of a battery module of the first structure of an embodiment of the present application;

[0025] Figure 7A rear view schematic diagram of a blister insulation structure and an end plate of a battery module of the first structure of an embodiment of the present application;

[0026] Figure 8 A schematic diagram of a battery module of a second structure according to an embodiment of the present application;

[0027] Fig. 9 An exploded schematic diagram of a battery module of the second structure of an embodiment of the present application;

[0028] Fig.10 A front view schematic diagram of an output electrode insulation structure and an end plate of a battery module of a second structure in an embodiment of the present application;

[0029] Fig.11 A rear view schematic diagram of a second structure of a battery module, an output electrode insulation structure and an end plate of the embodiment of the present application;

[0030] Fig.12 It is a partial cross-sectional schematic diagram of a battery module according to an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 100. Existing battery module; 110. Insulating member; 111. Insulating member body; 112. Insulating member protrusion;

[0033] 1. End plate; 2. Battery cell tab; 3. Output pole piece; 31. Output part;

[0034] 200, battery module; 210, blister insulation structure; 220, output pole insulation structure; 221, groove; 230, plug-in structure. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0036] It should be noted that the relative arrangement of the components, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0037] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0039] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] Figure 1 is an exploded schematic diagram of a conventional battery module 100. Figure 1 The structure shown is used as an example for explanation.

[0041] The cell tab 2 of the existing battery module 100 or the bus connected to the cell tab 2 will be arranged close to the end plate 1 of the existing battery module 100. The end plate 1 of the existing battery module 100 is made of metal material and is arranged on the outside of the cell tab 2. The insulating part 110 is arranged between the end plate 1 and the cell tab 2.

[0042] Figure 2 for Figure 1 The enlarged schematic diagram of part A in Figure 2 The structure shown is further used to illustrate the existing battery module 100 .

[0043] An output pole piece 3 is also provided at the end of the existing battery module 100. The output pole piece 3 can be used as a high-voltage output pole of the existing battery module 100. The output pole piece 3 includes an exposed output portion 31. Considering the electrical safety of the high-voltage output pole, the insulating member body 111 needs to be provided with an insulating member protrusion 112 near the output portion 31. Figure 3 is a schematic diagram of a conventional battery module 100, Figure 3 It can be seen that the insulating member protrusion 112 is arranged between the output portion 31 and the end plate 1 to increase the creepage distance and electrical clearance between the output pole piece 3 and the end plate 1 .

[0044] In order to make the insulating member protrusion 112 have a larger surface size, the insulating member protrusion 112 is designed to have a structure with a relatively complex appearance. For the structure with a relatively complex appearance, an injection molding process is usually selected for preparation.

[0045] The injection molding process is a process in which the injection molding material (such as plastic) is heated to a molten state and then injected into the mold, the injection molding material is pressed into the mold cavity by a high-pressure injection machine, and the finished product is taken out after cooling. In order to ensure that the molten injection molding material can flow smoothly in the mold cavity, the cross-sectional area of ​​the mold cavity is usually designed to be larger, which will result in the thickness of the injection molded part formed by the injection molding process being correspondingly thicker, and the material cost is higher.

[0046] Generally, the insulating member 110 is an integrally formed structure, that is, not only the insulating member protrusion 112 is prepared by injection molding, but also the insulating member body 111 is prepared by injection molding, which makes the thickness of the insulating member body 111 thicker. At the same time, the applicant has found that if the thickness of the insulating member body 111 is reduced without considering the injection molding process requirements, its electrical performance requirements can also be met.

[0047] In view of this, the present application embodiment provides a battery module 200, Figure 4 is an exploded schematic diagram of the battery module 200, such as Figure 4 The battery module 200 includes: an end plate 1; at least two battery cell tabs 2, along the thickness direction of the end plate 1 (such as Figure 4 The output pole piece 3 and the battery cell tab 2 are arranged on the same side of the end plate 1, and the output pole piece 3 includes an output portion 31; a vacuum-formed insulating structure 210, which is insulated and separated between the end plate 1 and the battery cell tab 2; an output pole insulating structure 220, which is insulated and separated between the end plate 1 and the output portion 31.

[0048] For example, Figure 4 , along the height direction of the battery module 200 (such as Figure 4 In the Z direction), at least a portion of the output pole piece 3 is located above the battery cell pole ear 2.

[0049] Exemplarily, the blister insulation structure 210 is a plate-like or sheet-like structure formed by an insulation material.

[0050] For example, Figure 6 FIG. 2 is a front view schematic diagram of the connection between the blister insulation structure 210 and the end plate 1. Figure 6 The blister insulation structure 210 is connected to the end plate 1 by gluing or hot melting.

[0051] It should be noted that the blister insulation structure 210 is a structural member formed by a blister process. The blister process is to adsorb a heated and softened plastic sheet or film to the surface of an object, and apply vacuum suction to form it while heating. Since the blister process is formed by a softened plastic sheet or film, the thickness of the blister can be made thinner than that of an injection molded part, and the amount of material used can be lower.

[0052] In this embodiment, the output pole insulation structure 220 and the blister insulation structure 210 can be formed separately. Compared with the above-mentioned solution in which the insulation body 111 and the insulation protrusion 112 are constructed as an integrally molded injection molded part, the molding process of the output pole insulation structure 220 will not have a decisive influence on the molding process of the blister insulation structure 210. In other words, the molding process of the output pole insulation structure 220 and the molding process of the blister insulation structure 210 can be the same or different. This is also one of the reasons why the blister insulation structure 210 can be molded by the blister process in this embodiment.

[0053] In this embodiment, the blister insulation structure 210 is used to insulate between the battery cell tab 2 and the end plate 1. When the blister insulation structure 210 is designed as a blister structure formed by a blister process, the thickness design of the blister insulation structure 210 can be mainly influenced by electrical performance, and the process requirements are no longer considered. Therefore, the thickness of the blister insulation structure 210 can be designed to be thinner. Compared with the insulating body 111 formed by the injection molding process, the amount of material used will be reduced, which can effectively reduce the preparation cost.

[0054] In addition, the output pole insulation structure 220 is used to ensure that there is a creepage distance and electrical clearance between the end plate 1 and the output pole piece 3 that meet the design requirements, which helps to ensure the electrical safety of the end plate 1 and the output pole piece 3.

[0055] like Figure 4 In some embodiments, along the thickness direction of the end plate 1 , the positive projection of the blister insulation structure 210 on the cell tab 2 covers the entire cell tab 2 .

[0056] When the blister insulation structure 210 covers all the cell tabs 2 in the thickness direction of the end plate 1 , the possibility of any cell tab 2 coming into contact with the end plate 1 can be avoided, further improving the insulation effect of the blister insulation structure 210 between the cell tabs 2 and the end plate 1 .

[0057] Combination Figure 4 It is also due to the above reasons that the side surface area of ​​the blister insulation structure 210 along its thickness direction is larger. When the thickness of the blister insulation structure 210 is thinner, compared with the insulation body 111 formed by injection molding, the amount of material used will be greatly reduced, and the effect of reducing the manufacturing cost is more obvious.

[0058] Figure 5 is a schematic diagram of the structure of the battery module 200, such as Figure 5 In some embodiments, along the height direction of the end plate 1 (eg Figure 5 In the Z direction), the upper surface of the output pole insulation structure 220 is not lower than the lower surface of the output portion 31.

[0059] Reference Fig.12 Along the height direction of the end plate 1, the output pole insulation structure 220 at least partially blocks the output part 31, which can more reliably ensure that the creepage distance between the end plate 1 and the output pole piece 3 meets the design requirements, and helps to further improve the electrical safety performance of the end plate 1 and the output pole piece 3.

[0060] For the blister formed by the blister process, it is difficult to form a structural part with a complex appearance. For the blister insulation structure 210, based on its electrical performance requirements, it can be designed as a structural part with a relatively simple structure. Except for the possible bending structure at the edge, most of the area is a flat structure. Therefore, the blister process can meet the molding requirements of the blister insulation structure 210.

[0061] The applicant has discovered that for the output pole insulation structure 220, if it is used in a battery module 200 that has lower requirements for the creepage distance and electrical clearance between the output pole bar 3 and the end plate 1, then the structure of the output pole insulation structure 220 can be simplified while satisfying the electrical performance of the output pole insulation structure 220, so that the output pole insulation structure 220 can also be prepared by the vacuum forming process.

[0062] like Figure 6 In some embodiments, the output pole insulating structure 220 is a blister structure.

[0063] Exemplarily, the output pole insulating structure 220 may be connected to the blister insulating structure 210 by bonding (for example, bonding by insulating glue) or hot melting.

[0064] Exemplarily, the output pole insulating structure 220 may be a shell structure, and the opening of the shell structure faces the blister insulating structure 210 .

[0065] For example, edges between adjacent surfaces of the output pole insulating structure 220 may be configured as chamfered structures.

[0066] by Figure 6 The structure shown is used as an example to illustrate that in order to simplify the structure of the output pole insulation structure 220, it is possible to avoid setting grooves on the surface of the output pole insulation structure 220 so that the output pole insulation structure 220 meets the process requirements of the vacuum forming process. The vacuum forming process is used to prepare the output pole insulation structure 220, which helps to reduce the preparation cost, thereby further reducing the overall preparation cost of the battery module 200.

[0067] In order to further reduce the preparation cost, in some embodiments, Figure 7 FIG. 2 is a schematic diagram of the rear view connection between the blister insulation structure 210 and the end plate 1, as shown in FIG. Figure 7A protruding convex structure is formed on the side wall of the blister insulation structure 210 facing the end plate 1 , and the convex structure is constructed as the output pole insulation structure 220 .

[0068] When both the output pole insulation structure 220 and the blister insulation structure 210 are formed by a blister process, the two can be constructed as an integrally formed blister part. Figure 7 The structure shown is used as an example to illustrate that a plate-like substrate can be used for a blister process. During the process of forming a blister piece from the plate-like substrate, a preset area of ​​the plate-like substrate protrudes toward one side to form a convex structure, and a position corresponding to the convex structure on the other side of the plate-like substrate forms a concave. The convex structure is formed into an output pole insulating structure 220, and the other parts of the plate-like substrate can be formed into a blister insulating structure 210.

[0069] Compared with the method of preparing the output pole insulation structure 220 and the vacuum forming insulation structure 210 separately, forming the two simultaneously through the same molding process can simplify the molding process of both on the one hand, and on the other hand, it can also simplify the overall assembly process of the battery module 200, which helps to further reduce the preparation cost of the battery module 200 and shorten the preparation time.

[0070] Figure 8 Schematic diagram of a battery module 200 having high requirements on creepage distance and electrical clearance between the output portion 31 of the output electrode sheet 3 and the end plate 1, as shown in FIG. Figure 8 When the output pole insulating structure 220 is used in the above-mentioned battery module 200, in order to make the output pole insulating structure 220 have a larger surface area, the output pole insulating structure 220 is usually designed to have a more complex appearance. For example, a protruding structure or a recessed structure is provided on the surface of the output pole insulating structure 220.

[0071] At this time, in order to meet the shape requirements of the output pole insulation structure 220, in some embodiments, the output pole insulation structure 220 is an injection molding structure.

[0072] The injection molding process can form an injection molded part with a relatively complex shape, and the process can meet the shape requirements of the output pole insulation structure 220. At the same time, since the vacuum molding insulation structure 210 and the output pole insulation structure 220 can be molded separately, the vacuum molding insulation structure 210 with a larger volume is still molded by the vacuum molding process. Although the output pole insulation structure 220 is molded by the injection molding process, due to its small volume, compared with the insulation part 110 molded as a whole by the injection molding process, this embodiment can save a certain amount of preparation cost while meeting higher electrical safety requirements.

[0073] Fig. 9 for Figure 8 The exploded schematic diagram of the battery module 200 is shown in FIG. Fig. 9In some embodiments, a groove 221 is formed on the surface of the output pole insulation structure 220 .

[0074] In combination with the above, when the output pole insulation structure 220 is formed by injection molding, its thickness is relatively large, so it is easy to meet the electrical requirements and strength requirements such as insulation performance. In order to reduce the amount of material used for the output pole insulation structure 220, a groove 221 can be selected on the surface of the output pole insulation structure 220 to increase the surface area of ​​the output pole insulation structure 220.

[0075] Fig.10 for Figure 8 The front view schematic diagram of the connection between the output electrode insulation structure 220 and the end plate 1 in the battery module 200 is shown in FIG. Fig.10 In some embodiments, the output pole insulation structure 220 is fixedly connected or detachably connected to the end plate 1 .

[0076] When the output pole insulation structure 220 and the blister insulation structure 210 are formed separately, the output pole insulation structure 220 and the end plate 1 can be fixedly connected by gluing or hot melting, or can be detachably connected by plugging or snapping.

[0077] Fig.11 for Figure 8 The rear view diagram of the connection between the vacuum-molded insulation structure 210, the output electrode insulation structure 220 and the end plate 1 in the battery module 200 is shown in FIG. Fig.11 The blister insulation structure 210 and the end plate 1 can be fixedly connected by means of gluing or hot melting.

[0078] After the blister insulation structure 210 and the output pole insulation structure 220 are respectively connected to the end plate 1 , the blister insulation structure 210 and the output pole insulation structure 220 may contact each other, or other structural members may be disposed between them.

[0079] like Fig. 9 In some embodiments, the end plate 1 is provided with a plug-in structure 230 , and the output pole insulating structure 220 is plug-in-matched with the end plate 1 through the plug-in structure 230 .

[0080] Exemplarily, the plug-in structure 230 may protrude from the surface of the end plate 1, and the plug-in structure 230 may be inserted into the output pole insulating structure 220; or, the plug-in structure 230 may be recessed in the surface of the end plate 1 (e.g., a groove structure), and at least a portion of the output pole insulating structure 220 may be inserted into the plug-in structure 230; or, the plug-in structure 230 may pass through the end plate 1 (e.g., a through hole structure or a hollow pattern), and the output pole insulating structure 220 may be plugged into the plug-in structure 230.

[0081] In this embodiment, different end plates 1 can be plugged in and connected to the output pole insulation structure 220 by providing a plug-in structure 230. Similarly, output pole insulation structures 220 with different shapes can also be plugged in and matched with the same plug-in structure 230. In this way, the end plate 1 provided with the plug-in structure 230 can flexibly select different output pole insulation structures 220 that match the usage scenarios according to different usage scenarios of creepage distances or electrical clearances.

[0082] The plug-in connection between the end plate 1 and the output pole insulation structure 220 is achieved through the plug-in structure 230 , which helps to improve the versatility of the output pole insulation structure 220 and helps to reduce the material management cost of the output pole insulation structure 220 .

[0083] Fig.12 is a partial cross-sectional schematic diagram of the battery module 200, such as Fig.12 In some embodiments, the output pole insulation structure 220 is located above the edge of the end plate 1 .

[0084] Exemplarily, the output pole insulation structure 220 is disposed on a side of the blister insulation structure 210 facing the end plate 1 .

[0085] It can be understood that the creepage distance between the output portion 31 and the end plate 1 refers to the shortest path between the output portion 31 and the end plate 1 measured along the surface of the output pole insulation structure 220. Fig.12 As shown, when the output pole insulation structure 220 is located above the edge of the end plate 1, the creepage distance between the output part 31 and the end plate 1 includes at least a distance on the top surface of the output pole insulation structure 220 and a distance at one end of the side wall surface of the output pole insulation structure 220 away from the blister insulation structure 210, which can make it easier for the creepage distance between the output part 31 and the end plate 1 to meet higher electrical safety requirements.

[0086] In combination with the above, the groove 221 is provided on the top surface of the output pole insulation structure 220 and the side wall surface away from the blister insulation structure 210, which can increase the creepage distance between the output portion 31 and the end plate 1. If the groove 221 is provided on the top surface of the output pole insulation structure 220, the output pole insulation structure 220 may be distorted along its thickness direction (such as Fig.12 If the size of the output electrode insulation structure 220 protruding from the end plate 1 is large, the overall size of the battery module 200 will also be large.

[0087] In order to avoid the above problems, Fig.12 In some embodiments, the groove 221 is opened on the surface of the output pole insulation structure 220 away from the blister insulation structure 210 .

[0088] like Fig.12, the creepage distance between the output portion 31 and the end plate 1 is the surface distance between the output pole insulation structure 220 and the blister insulation structure 210 close to the dotted line in the figure. It can be seen that even if the output pole insulation structure 220 is arranged along its height direction (such as Fig.12 The size of the output pole insulation structure 220 protruding from the end plate 1 is relatively small, so that the overall structure of the battery module 200 can be relatively compact.

[0089] like Figure 5 In some embodiments, along the thickness direction of the end plate 1 (eg Figure 5 The end of the output portion 31 does not protrude outward from the outer side wall of the output pole insulation structure 220.

[0090] Combination Figure 5 The structure shown in FIG. 1 is further described, the end of the output pole insulation structure 220 can be aligned with the end of the output portion 31, or along the extension direction of the output portion 31 (such as Figure 5 The end of the output pole insulation structure 220 (in the X direction) can extend beyond the end of the output portion 31, which enables the output pole insulation structure 220 to more comprehensively shield the output portion 31, thereby helping to further ensure the electrical safety of the end plate 1 and the output pole piece 3.

[0091] Based on the same inventive concept and in combination with the description of the battery modules of the above embodiments, this embodiment provides a battery pack having the corresponding technical effects of the battery modules of the above embodiments, which will not be described in detail herein.

[0092] A battery pack includes the battery module 200 according to the above embodiments.

[0093] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0094] The various embodiments in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0095] The description of the present application is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present application to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present application, and to enable those of ordinary skill in the art to understand the present application and thus design various embodiments with various modifications suitable for specific purposes.

[0096] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0097] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0098] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A battery module, characterized in that: include: End plate; At least two battery cell tabs are located on one side of the end plate along the thickness direction of the end plate; An output pole piece, at least a portion of which is disposed on the same side of the end plate as the cell pole lug, and the output pole piece includes an output portion; A blister insulation structure, with insulation partitioned between the end plate and the battery cell tab; The output pole insulation structure is insulated and separated between the end plate and the output part.

2. The battery module according to claim 1, characterized in that: Along the thickness direction of the end plate, the plastic insulation structure covers all of the battery cell tabs in the orthographic projection of the battery cell tabs.

3. The battery module according to claim 1, characterized in that: Along the height direction of the end plate, the upper surface of the output pole insulation structure is not lower than the lower surface of the output part.

4. The battery module according to claim 1, characterized in that: The output pole insulation structure is a vacuum forming structure.

5. The battery module according to claim 4, characterized in that: A protruding convex structure is formed on the side wall of the vacuum forming insulation structure facing the end plate, and the protruding structure is configured as the output pole insulation structure.

6. The battery module according to claim 1, characterized in that: The output pole insulation structure is an injection molding structure.

7. The battery module according to claim 6, characterized in that: The output pole insulation structure is fixedly connected or detachably connected to the end plate.

8. The battery module according to claim 6, characterized in that: The end plate is provided with a plug-in structure, and the output pole insulation structure is plug-in-matched with the end plate through the plug-in structure.

9. The battery module according to claim 1, characterized in that: The output pole insulation structure is located above the edge of the end plate.

10. The battery module according to claim 1, characterized in that: Along the thickness direction of the end plate, the end of the output portion does not protrude outwardly from the outer side wall of the output pole insulation structure.

11. A battery pack, characterized in that: Comprising a battery module as described in any one of claims 1-10.

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