Battery cell module and battery pack

Abstract

The utility model discloses a battery cell module and a battery pack. The battery cell module comprises a battery cell assembly, a circuit protection board and a limiting part, wherein the top of the battery cell assembly is provided with a first welding part, the circuit protection plate covers the battery cell assembly, the circuit protection plate is provided with a second welding part corresponding to the first welding part, and the second welding part is in welding connection with the first welding part. And the limiting part is arranged on the circuit protection plate and is used for limiting the circuit protection plate on the battery cell assembly. According to the battery cell module and the battery pack, the problem of relatively low assembly efficiency of the battery cell module in the prior art is solved.

Description

TECHNICAL FIELD

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

[0002] In the prior art, when welding the battery cell assembly and the circuit protection plate, the circuit protection plate or the battery cell assembly is subjected to external force, which causes the battery cell assembly or the circuit protection plate to easily deviate during welding, thereby reducing the assembly efficiency of the battery cell module. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a battery cell module and a battery pack to at least solve the problem of low assembly efficiency of the battery cell module in the prior art.

[0004] According to one aspect of the present application, a battery cell module is provided, comprising:

[0005] a battery cell assembly, a first welding portion being arranged on the top of the battery cell assembly;

[0006] a circuit protection plate, the circuit protection plate being arranged on the battery cell assembly, a second welding portion corresponding to the first welding portion being arranged on the circuit protection plate, the second welding portion being welded to the first welding portion;

[0007] a limiting portion, the limiting portion being arranged on the circuit protection plate, the limiting portion being used to limit the circuit protection plate to the battery cell assembly.

[0008] Further, the limiting portion comprises at least two limiting flanges, the at least two limiting flanges being arranged on the edges of the opposite sides of the circuit protection plate respectively, and the at least two limiting flanges abutting against at least the opposite sides of the battery cell assembly.

[0009] Further, the limiting flange comprises:

[0010] a straight section, the straight section being connected to the edge of the circuit protection plate, the straight section extending along the bottom of the battery cell module and being arranged abutting against the battery cell assembly;

[0011] a guide section, the guide section being connected to one end of the straight section away from the circuit protection plate, the guide section extending in a direction away from the battery cell assembly.

[0012] Further, a first chamfer is arranged at the connection between the straight section and the circuit protection plate, and a second chamfer is arranged at the connection between the straight section and the guide section.

[0013] Further, the battery cell module further comprises a first end plate and a second end plate, the first end plate and the second end plate are respectively arranged on two sides of the battery cell assembly along a first direction, and the first end plate and the second end plate are used for fixing the battery cell module.

[0014] The limiting flanges comprise two, and the two limiting flanges are respectively arranged on two sides of the circuit protection plate along a second direction perpendicular to the first direction.

[0015] Further, the battery cell module further comprises a first adhesive plate and a second adhesive plate, the first adhesive plate is adhered between the first end plate and the battery cell assembly, and the second adhesive plate is adhered between the second end plate and the battery cell assembly.

[0016] Among them, the first adhesive plate and the second adhesive plate both extend along the height direction of the battery cell module and are respectively stopped on two opposite side walls of the circuit protection plate.

[0017] Further, the battery cell module further comprises an insulating cover, the insulating cover is arranged on the circuit protection plate, and the outer periphery of the insulating cover has an outer flange.

[0018] Among them, the outer flange is respectively abutted on the first end plate and the second end plate; and / or,

[0019] The outer flange and the first end plate have a first gap therebetween, and the outer flange and the second end plate have a second gap therebetween.

[0020] Further, one of the insulating cover and the circuit protection plate is provided with a connecting protrusion, and the other one is provided with a connecting groove matched with the connecting protrusion, and the insulating cover and the circuit protection plate are fixedly connected through the connecting protrusion and the connecting groove; and / or,

[0021] The insulating cover is provided with a first connecting hole, the circuit protection plate is provided with a second connecting hole corresponding to the first connecting hole, and the insulating cover and the circuit protection plate are fixed through a fixing member in sequence through the first connecting hole and the second connecting hole.

[0022] Further, the first welding portion is provided with a first welding hole, and the second welding portion is provided with a second welding hole corresponding to the first welding hole, and the first welding portion and the second welding portion are welded and fixed through the first welding hole and the second welding hole.

[0023] On the other hand, the application also provides a battery pack, which comprises the above-mentioned battery cell module.

[0024] Compared with the prior art, the limiting portion is arranged on the circuit protection plate, and the limiting portion is used for limiting the circuit protection plate to the battery cell assembly, that is, the circuit protection plate is difficult to relatively move with the battery cell assembly under the action of an external force, so that the circuit protection plate and the battery cell assembly can be welded after the circuit protection plate is installed on the battery cell assembly, and the assembly efficiency of the battery cell assembly and the circuit protection plate is improved to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 An explosion structure schematic view of the battery pack disclosed in the present application;

[0027] Figure 2 An explosion structure schematic view of the battery cell module disclosed in the present application;

[0028] Figure 3 A structure schematic view of the battery cell module disclosed in the present application;

[0029] Figure 4 A structure schematic view of the battery cell module disclosed in the present application; Figure 2 An enlarged schematic view of the I area in the middle;

[0030] Figure 5 An enlarged schematic view of the II area in the middle; Figure 3 An enlarged schematic view of the III area in the middle;

[0031] Figure 6 An enlarged schematic view of the III area in the middle; Figure 3 An enlarged schematic view of the III area in the middle;

[0032] Figure 7 A structure schematic view of the insulating cover disclosed in the present application.

[0033] In the above drawings, the following reference signs are included:

[0034] 10, box body; 11, main body; 12, cover body; 20, battery cell module; 21, battery cell assembly; 22, circuit protection plate; 23, insulating cover; 31, first end plate; 32, second end plate; 33, first adhesive plate; 34, second adhesive plate; 41, first gap; 42, second gap; 51, fixing piece; 211, first welding portion; 221, limiting flange; 222, connecting protrusion; 223, second welding portion; 224, first connecting hole; 231, connecting groove; 232, outer flange; 233, second connecting hole; 2111, first welding hole; 2231, second welding hole; 2211, flat section; 2212, guide section; 2213, first chamfer; 2214, second chamfer. DETAILED DESCRIPTION

[0035] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it will be further understood that the terms "comprise" and / or "include" when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof.

[0037] The relative arrangement of the components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized specification, if appropriate. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as limiting. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0038] Reference Figures 1 to 7 As shown, according to the embodiments of the present application, a battery pack is provided, which includes a battery cell module 20, the battery cell module 20 including a battery cell assembly 21, a circuit protection plate 22, and a limiting portion.

[0039] The top of the battery cell assembly 21 is provided with a first welding portion 211, the circuit protection plate 22 is provided on the battery cell assembly 21, the circuit protection plate 22 is provided with a second welding portion 223 corresponding to the first welding portion 211, and the second welding portion 223 is welded to the first welding portion 211. The limiting portion is provided on the circuit protection plate 22, and the limiting portion is used to limit the circuit protection plate 22 to the battery cell assembly 21.

[0040] Specifically, when welding the battery cell assembly 21 and the circuit protection cover, the circuit protection plate 22 is usually susceptible to external force, which can cause the second welding portion 223 on the circuit protection plate 22 to deviate from the position of the first welding portion 211 on the battery cell assembly 21, so that the battery cell assembly 21 cannot be welded to the corresponding position of the circuit protection plate 22. Therefore, the embodiment provides a limiting portion on the circuit protection plate 22, which limits the circuit protection plate 22 to the battery cell assembly 21, that is, the circuit protection plate 22 is difficult to move relative to the battery cell assembly 21 under the action of external force, so that the circuit protection plate 22 and the battery cell assembly 21 can be welded after the circuit protection plate 22 is installed on the battery cell assembly 21, which improves the assembly efficiency of the battery cell assembly 21 and the circuit protection plate 22 to a certain extent.

[0041] Further, the limiting portion includes at least two limiting flanges 221, and the at least two limiting flanges 221 are arranged at the edges of the opposite sides of the circuit protection plate 22, respectively, and abut against at least opposite sides of the battery cell assembly 21.

[0042] Specifically, the at least two opposite edges of the circuit protection plate 22 are provided with the limiting flanges 221, and the at least two limiting flanges 221 abut against at least opposite sides of the battery cell assembly 21, so that the battery cell assembly 21 applies a supporting force to the opposite sides of the circuit protection plate 22, so that the circuit protection plate 22 is limited on the battery cell assembly 21. Of course, the remaining edges of the circuit protection plate 22 can also be provided with the limiting flanges 221, for example, when the protection plate is a rectangular plate, the opposite four edges of the rectangular plate can be provided with the limiting flanges 221; in addition, the limiting flanges 221 can also be arranged only on three edges or opposite two edges of the rectangular plate.

[0043] Further, the limiting flange 221 includes a flat section 2211 and a guide section 2212. The flat section 2211 is connected with the edge of the circuit protection plate 22, and the flat section 2211 extends along the bottom of the battery cell module 20 and is arranged in abutment with the battery cell assembly 21. The guide section 2212 is connected at an end of the flat section 2211 away from the circuit protection plate 22, and the guide section 2212 extends in a direction away from the battery cell assembly 21.

[0044] In this embodiment, the battery cell assembly 21 exerts a supporting force on the straight section 2211, thereby limiting the circuit protection board 22 through the straight section 2211. This prevents relative displacement between the circuit protection board 22 and the battery cell assembly 21 when subjected to relatively weak external forces. Furthermore, the guide section 2212 in this embodiment serves a guiding function. Specifically, when the circuit protection board 22 is fastened to the battery cell assembly 21 via the limiting flange 221, the guide section 2212 can be aligned with the edge of the battery cell assembly 21 to quickly engage the circuit protection board 22 and the battery cell assembly 21.

[0045] As attached Figure 4 As shown, a first chamfer 2213 is provided at the connection between the straight section 2211 and the circuit protection board 22, and a second chamfer 2214 is provided at the connection between the straight section 2211 and the guide section 2212. The first chamfer 2213 and the second chamfer 2214 are used to prevent interference between the circuit protection board 22 and the cell assembly 21 during assembly, thereby preventing damage to the circuit protection board 22 or the cell assembly 21.

[0046] As attached Figure 1 As shown, the battery module 20 further includes a first end plate 31 and a second end plate 32, which are respectively arranged on the battery assembly 21 along the first direction (as shown in the attached figure). Figure 1 On both sides of the Y direction), the first end plate 31 and the second end plate 32 are used to fix the battery module 20; the limiting flange 221 includes two, and the two limiting flanges 221 are respectively arranged in the second direction of the circuit protection board 22 perpendicular to the first direction (such as the attached Figure 1 on both sides of the center X direction).

[0047] Specifically, the first end plate 31 and the second end plate 32 are fixed in the box body 10 of the battery pack. The assembly sequence of the battery cell module 20 in the battery pack is as follows: first, the second end plate 32 is fixed in the box body 10 of the battery pack, then one side of the battery cell assembly 21 is fixed on the second end plate 32, then the first end plate 31 is fixed on the other side of the battery cell assembly 21, and the first end plate 31 is fixed in the box body 10 of the battery pack, so that the battery cell assembly 21 is fixed between the first end plate 31 and the second end plate 32. Then, the circuit protection plate 22 is buckled on the battery cell assembly 21; finally, the circuit protection plate 22 and the battery cell assembly 21 are welded, and the assembly of one battery cell module 20 is completed. In this embodiment, the limiting flanges 221 include two, and the two limiting flanges 221 are respectively arranged on both sides of the second direction perpendicular to the first direction, so that the circuit protection plate 22 is difficult to move relative to the battery cell assembly 21 in the second direction under the limitation of the battery cell assembly 21. In this embodiment, the box body 10 includes a body 11 and a cover 12, and the cover 12 is detachably covered on the body 11, so as to facilitate the operator to assemble and maintain the battery cell assembly 21 in the battery pack.

[0048] Further, the battery cell module 20 further includes a first adhesive plate 33 and a second adhesive plate 34, the first adhesive plate 33 is adhered between the first end plate 31 and the battery cell assembly 21, and the second adhesive plate 34 is adhered between the second end plate 32 and the battery cell assembly 21; wherein the first adhesive plate 33 and the second adhesive plate 34 both extend along the height direction (such as the Z direction in the figure) of the battery cell module 20, and are respectively stopped on two opposite side walls of the circuit protection plate 22. Figure 1

[0049] Specifically, the first adhesive plate 33 and the second adhesive plate 34 both extend along the height direction of the battery cell module 20, and are respectively stopped on two opposite side walls of the circuit protection plate 22, so that the circuit protection plate 22 is limited between the first adhesive plate 33 and the second adhesive plate 34. That is to say, when the circuit protection plate 22 is subjected to an external force in the first direction, the circuit protection plate 22 is difficult to move in the first direction due to the support force of the first adhesive plate 33 and the second adhesive plate 34. In addition, in this embodiment, the first end plate 31 and the second end plate 32 both extend along the height direction of the battery cell module 20, and the projection area of the first adhesive plate 33 and the first end plate 31 in the first direction is the same, and the projection area of the second adhesive plate 34 and the second end plate 32 in the first direction is the same. In this embodiment, the first adhesive plate 33 and the second adhesive plate 34 are both epoxy plates, and the epoxy plates are double-sided adhesive, so as to be adhered between the battery cell module 20 and the first end plate 31 or the second end plate 32.

[0050] Since the circuit protection plate 22 has more conductive components, in order to prevent the external environment from affecting the circuit protection plate 22, the circuit protection plate 22 is provided with a plurality of limiting flanges 221, and the limiting flanges 221 are arranged on both sides of the second direction perpendicular to the first direction, so that the circuit protection plate 22 is difficult to move relative to the battery cell assembly 21 in the second direction under the limitation of the battery cell assembly 21. Figure 2 ​and attached Figure 7 As shown in the figure, the battery cell module 20 in the embodiment further comprises an insulating cover 23, which is arranged on the circuit protection plate 22. That is to say, the insulating cover 23 can improve the protection performance of the circuit protection plate 22, so as to avoid the influence of external water stains or dust on the circuit protection plate 22, thereby improving the service life of the battery cell module 20 to a certain extent.

[0051] In addition, in some embodiments, the outer periphery of the insulating cover 23 has an outer flange 232, which abuts against the first end plate 31 and the second end plate 32 respectively. Specifically, the arrangement of the outer flange 232 and the first end plate 31 and the second end plate 32 can make the first end plate 31 and the second end plate 32 have a limiting effect on the insulating cover 23, so as to prevent the insulating cover 23 from shaking under the action of the first direction external force when the insulating cover 23 is not fixed with the circuit protection plate 22.

[0052] Of course, in other embodiments, for example, the insulating cover 23 is arranged on the circuit protection plate 22, and the first end plate 31 and the second end plate 32 are arranged on the insulating cover 23. Figure 5 and attached Figure 6 As shown in the figure, the outer flange 232 and the first end plate 31 have a first gap 41 therebetween, and the outer flange 232 and the second end plate 32 have a second gap 42 therebetween, so as to avoid the interference between the first end plate 31 or the second end plate 32 and the insulating cover 23 when the insulating cover 23 is assembled with the circuit protection plate 22.

[0053] Further, one of the insulating cover 23 and the circuit protection plate 22 is provided with a connecting protrusion 222, and the other is provided with a connecting groove 231 matched with the connecting protrusion 222, and the insulating cover 23 and the circuit protection plate 22 are fixedly connected through the connecting protrusion 222 and the connecting groove 231.

[0054] In a specific embodiment, the insulating cover 23 is provided with the connecting groove 231, and the circuit protection plate 22 is provided with the connecting protrusion 222, which is inserted into the connecting groove 231, so as to fix the insulating cover 23 and the circuit protection plate 22. Alternatively, the circuit protection plate 22 is provided with the connecting groove 231, and the insulating cover 23 is provided with the connecting protrusion 222. In addition, in the embodiment, the connecting protrusion 222 and the connecting groove 231 each comprise a plurality of connecting protrusions 222 and a plurality of connecting grooves 231, which are arranged one by one in correspondence, and the cooperation of the connecting protrusion 222 and the connecting groove 231 not only can fix the insulating cover 23 and the circuit protection plate 22, but also can play a limiting and guiding role when the circuit protection plate 22 and the insulating cover 23 are assembled.

[0055] Alternatively, the insulating cover 23 is provided with a first connecting hole 224, and the circuit protection plate 22 is provided with a second connecting hole 233 corresponding to the first connecting hole 224, and the insulating cover 23 and the circuit protection plate 22 are fixed through the fixing member 51 passing through the first connecting hole 224 and the second connecting hole 233 in sequence.

[0056] Specifically, in this embodiment, the fixing member 51 is a plastic screw, which can prevent the circuit protection board 22 from being electrically connected to the outside through the fixing member 51, thereby affecting the circuit protection board 22. In a specific embodiment, as shown in the attached Figure 2 and attached Figure 7 As shown, a connecting groove 231 is provided on the insulating cover 23, a connecting protrusion 222 is provided on the circuit protection board 22, a first connecting hole 224 is provided on the insulating cover 23, and a second connecting hole 233 is provided on the circuit protection board 22; that is, double fixation is adopted when the insulating cover 23 and the circuit protection board 22 are connected, thereby effectively improving the fixing effect of the circuit protection board 22 and the insulating cover 23.

[0057] Furthermore, a first welding hole 2111 is formed on the first welding portion 211 , and a second welding hole 2231 corresponding to the first welding hole 2111 is formed on the second welding portion 223 . The first welding portion 211 and the second welding portion 223 are fixed by welding through the first welding hole 2111 and the second welding hole 2231 .

[0058] In this embodiment, the first welding portion 211 protrudes in a direction close to the circuit protection board 22, and the second welding portion 223 is recessed in a direction away from the battery cell assembly 21. The first welding portion 211 is inserted into the second welding portion 223, and the first welding hole 2111 corresponds to the second welding hole 2231, so as to facilitate the assembler to weld the first welding hole 2111 and the second welding hole 2231.

[0059] In summary, the present application has at least the following beneficial effects: the present application provides a limiting portion on the circuit protection board 22, that is, limiting flanges 221 are provided on at least two opposite edges of the circuit protection board 22, and the limiting flanges 221 abut against the battery assembly 21, so that the battery assembly 21 can limit the circuit protection board 22; when welding the circuit protection board 22 and the battery assembly 21, the circuit protection board 22 is not easily affected by external forces and relatively displaced from the battery assembly 21, thereby improving the welding efficiency of the battery assembly 21 and the circuit protection board 22 to a certain extent. In addition, in the present application, the first adhesive plate 33 and the second adhesive plate 34 both extend along the height direction of the battery module 20 and stop at both ends of the circuit protection board 22, so that when the circuit protection board 22 is affected by external forces in the first direction, the circuit protection board 22 will not be relatively displaced from the battery assembly 21 in the first direction under the action of the first adhesive plate 33 or the second adhesive plate 34. In addition, in the present application, the circuit protection board 22 and the insulating cover 23 are double fixed, that is, the circuit protection board 22 and the insulating cover 23 are not only fixed by the connecting flange and the connecting groove 231, but also the insulating cover 23 and the circuit protection board 22 are locked by the fixing member 51, thereby improving the connection stability between the circuit protection board 22 and the insulating cover 23.

[0060] For purposes of the description hereinafter, spatial or directional terms, for example, "above", "below", "upper", "lower", and the like, can be used, and relate to the device or feature being described with respect to the drawings in which the device or feature is illustrated. It is to be understood that the spatial or directional terms are intended to encompass different orientations of the device or feature in use or operation, in addition to the orientation depicted in the figures. For example, if the device or feature is inverted or rotated by 90°, a downward event or motion described with respect to the upward orientation will then be oriented upward. Thus, a term such as "above" can encompass both an orientation above and an orientation below. The device or feature can be otherwise oriented (rotated 90° or at other orientations) and the spatial or directional terms will be interpreted relative to the device or feature in its then-current orientation. The following description is exemplary of the aspects only and is not intended to limit the scope, applicability, or configuration of the application in any way. Rather, the following description provides a convenient mechanism for overviewing the breadth of the application.

[0061] In addition, it should be noted that the use of "first", "second", "third", etc. words to describe various components is only intended to distinguish the components from one another, and is not intended to limit the scope of the present application, unless otherwise stated. Therefore, the above words should not be interpreted as having special meaning or significance to the scope of the present application.

[0062] The preferred embodiments of the present application have been described above with the intent to enable those skilled in the art to make and use it. Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the true scope of the present application is defined solely by the metes of the following claims.

Claims

1. A battery cell module, characterized in that: include: A battery cell assembly (21), wherein a first welding portion (211) is provided on the top of the battery cell assembly (21); a circuit protection board (22), the circuit protection board (22) being covered on the battery core assembly (21), the circuit protection board (22) being provided with a second welding portion (223) corresponding to the first welding portion (211), the second welding portion (223) being welded to the first welding portion (211); A limiting portion is provided on the circuit protection board (22), and is used to limit the circuit protection board (22) to the battery core assembly (21).

2. The battery cell module according to claim 1, characterized in that: The limiting portion comprises at least two limiting flanges (221), the at least two limiting flanges (221) being respectively arranged on the edges of two opposite sides of the circuit protection board (22), and the at least two limiting flanges (221) being pressed against at least two opposite sides of the battery cell assembly (21).

3. The battery cell module according to claim 2, characterized in that: The limiting flange (221) comprises: a straight section (2211), the straight section (2211) being connected to the edge of the circuit protection board (22), the straight section (2211) extending along the bottom of the battery module and being arranged in close contact with the battery assembly (21); A guide section (2212), the guide section (2212) being connected to an end of the straight section (2211) away from the circuit protection board (22), and the guide section (2212) extending in a direction away from the battery cell assembly (21).

4. The battery cell module according to claim 3, characterized in that: A first chamfer (2213) is provided at the connection between the straight section (2211) and the circuit protection board (22), and a second chamfer (2214) is provided at the connection between the straight section (2211) and the guide section (2212).

5. The battery cell module according to claim 2, characterized in that: The battery module further comprises a first end plate (31) and a second end plate (32), wherein the first end plate (31) and the second end plate (32) are respectively arranged on both sides of the battery assembly (21) along a first direction, and the first end plate (31) and the second end plate (32) are used to fix the battery module; The limiting flanges (221) include two, and the two limiting flanges (221) are respectively arranged on both sides of the circuit protection board (22) in a second direction perpendicular to the first direction.

6. The battery cell module according to claim 5, characterized in that: The battery module further comprises a first adhesive plate (33) and a second adhesive plate (34), wherein the first adhesive plate (33) is bonded between the first end plate (31) and the battery assembly (21), and the second adhesive plate (34) is bonded between the second end plate (32) and the battery assembly (21); The first adhesive plate (33) and the second adhesive plate (34) both extend along the height direction of the battery module and are respectively stopped at two opposite side walls of the circuit protection plate (22).

7. The battery cell module according to claim 5, characterized in that: The battery module further includes an insulating cover (23), the insulating cover (23) being arranged on the circuit protection board (22), and the outer periphery of the insulating cover (23) having an outer flange (232); wherein the outer flange (232) abuts against the first end plate (31) and the second end plate (32) respectively; and / or, A first gap (41) is provided between the outer flange (232) and the first end plate (31), and a second gap (42) is provided between the outer flange (232) and the second end plate (32).

8. The battery cell module according to claim 7, characterized in that: A connection protrusion (222) is provided on one of the insulating cover (23) and the circuit protection board (22), and a connection groove (231) adapted to the connection protrusion (222) is provided on the other of the insulating cover (23) and the circuit protection board (22), and the insulating cover (23) and the circuit protection board (22) are fixedly connected via the connection protrusion (222) and the connection groove (231); and / or, The insulating cover (23) is provided with a first connection hole (224), the circuit protection board (22) is provided with a second connection hole (233) corresponding to the first connection hole (224), and the insulating cover (23) and the circuit protection board (22) are fixed by a fixing member (51) passing through the first connection hole (224) and the second connection hole (233) in sequence.

9. The battery cell module according to any one of claims 1 to 8, characterized in that: The first welding portion (211) is provided with a first welding hole (2111), and the second welding portion (223) is provided with a second welding hole (2231) corresponding to the first welding hole (2111). The first welding portion (211) and the second welding portion (223) are fixed by welding through the first welding hole (2111) and the second welding hole (2231).

10. A battery pack, characterized in that: The battery pack includes the battery cell module according to any one of claims 1 to 9.

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