Combined battery cell module and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a combined battery cell module and a battery pack, and the combined battery cell module comprises a plurality of first battery cells arranged at intervals along a first direction; the first battery cell is provided with a first end and a second end which are distributed along a second direction; the plurality of second battery cells are arranged at intervals along the first direction, and one first battery cell is arranged between any two adjacent second battery cells; the second battery cell is provided with a third end and a fourth end which are distributed along a second direction; the first anti-explosion valve is arranged at the second end, and the second anti-explosion valve is arranged at the fourth end. According to the combined battery cell module provided by the invention, the plurality of first battery cells and the plurality of second battery cells are arranged according to the preset rule to form the battery cell module, and the first anti-explosion valve and the second anti-explosion valve are arranged at the same end of the battery cell module, so that a control area of spraying of the anti-explosion valve after thermal runaway can be effectively limited; and the risk of serious consequences caused by unordered spreading range of thermal runaway in the battery pack and difficulty in control is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a combined battery cell module and a battery pack. Background Art

[0002] At present, the existing battery packaging uses battery cells of the same type, which is relatively simple. At the same time, the locations of explosion-proof valves are also distributed in different areas. Most of them adopt the method of separating the explosion-proof valves on both sides after the battery cells are assembled. Once thermal runaway occurs, the diffusion area of ​​the thermal runaway is large and difficult to control, which can easily lead to serious consequences. Utility Model Content

[0003] The purpose of the present application is to provide a combined battery cell module and battery pack, so as to solve to a certain extent the technical problem that the existing battery packs in the prior art mostly use the same type of battery cells, and the explosion-proof valves are set in different areas. Once thermal runaway occurs in individual battery cells, the thermal runaway will spread over a large area.

[0004] The present application provides a combined battery cell module, comprising:

[0005] A first battery cell, wherein the number of the first battery cells is multiple; the multiple first battery cells are spaced apart along a first direction; the first battery cell has a first end and a second end distributed along a second direction different from the first direction;

[0006] a second battery cell, wherein the number of the second battery cells is multiple, the multiple second battery cells are arranged at intervals along the first direction, and one first battery cell is arranged between any two adjacent second battery cells; the second battery cell has a third end and a fourth end distributed along the second direction; the multiple first ends and the multiple third ends are arranged at intervals along the first direction;

[0007] A first explosion-proof valve and a second explosion-proof valve, wherein the first explosion-proof valve is arranged at the first end, and the second explosion-proof valve is arranged at the third end; or, the first explosion-proof valve is arranged at the second end, and the second explosion-proof valve is arranged at the fourth end.

[0008] In the above technical solution, further, the first battery cell includes a first positive electrode column and a first negative electrode column, the first positive electrode column is arranged at the second end, and the first negative electrode column is arranged at the first end;

[0009] The second battery cell includes a second positive electrode column and a second negative electrode column, the second positive electrode column is arranged at the third end, and the second negative electrode column is arranged at the fourth end;

[0010] The first end and the third end are arranged at intervals along the first direction, and the second end and the fourth end are arranged at intervals along the first direction.

[0011] In any of the above technical solutions, further, the second positive electrode column includes a first fixing portion and a first extending portion, the first fixing portion is fixed to the third end, and the first extending portion extends along the first direction toward the adjacent first negative electrode column;

[0012] The second negative electrode column includes a second fixing portion and a second extending portion, the second fixing portion is fixed to the fourth end, and the second extending portion extends along the first direction toward the adjacent first positive electrode column.

[0013] In any of the above technical solutions, further, a first step portion is provided between the first fixing portion and the first extending portion; and a second step portion is provided between the second fixing portion and the second extending portion.

[0014] In any of the above technical solutions, further, the first battery cell further includes a first shell, the first shell has a rectangular parallelepiped structure, the length L1 of the first shell is 200 mm to 800 mm, the height H1 of the first shell is 60 mm to 100 mm, and the width W1 of the first shell is 12 mm to 20 mm;

[0015] The second battery cell further includes a second shell, the second shell has a rectangular parallelepiped structure, a length L2 of the second shell is 200 mm to 800 mm, a height H2 of the second shell is 60 mm to 100 mm, and a width W2 of the second shell is 12 mm to 20 mm.

[0016] In any of the above technical solutions, further, a predetermined spacing S is formed between the second battery cell and the adjacent first battery cell, wherein 0.3 mm ≤ S ≤ 1 mm.

[0017] In any of the above technical solutions, further, the second shell further includes a side wall, and the first protruding portion and the second protruding portion protrude relative to the side wall by a predetermined width F along the first direction, wherein F=S+W2 / 2.

[0018] In any of the above technical solutions, further, the combined battery cell module also includes a first traceability component and a second traceability component;

[0019] The first traceability component is arranged at the first end, and the second traceability component is arranged at the third end; or the first traceability component is arranged at the second end, and the second traceability component is arranged at the fourth end.

[0020] In any of the above technical solutions, further, the first direction and the second direction are perpendicular to each other;

[0021] The first direction is a width direction of the first battery cell and the second battery cell, and the second direction is a length direction of the first battery cell and the second battery cell.

[0022] The present application also provides a battery pack, comprising the combined battery cell module described in any of the above technical solutions, and thus having all the beneficial technical effects of the combined battery cell module, which will not be repeated here.

[0023] Compared with the prior art, the beneficial effects of this application are:

[0024] The combined battery cell module provided in the present application includes: a first battery cell, wherein the number of the first battery cells is multiple; the multiple first battery cells are arranged at intervals along the first direction; the first battery cell has a first end and a second end distributed along a second direction different from the first direction; a second battery cell, wherein the number of the second battery cells is multiple, the multiple second battery cells are arranged at intervals along the first direction, and a first battery cell is arranged between any two adjacent second battery cells; the second battery cell has a third end and a fourth end distributed along the second direction; the multiple first ends and the multiple third ends are arranged at intervals along the first direction; a first explosion-proof valve and a second explosion-proof valve, wherein the first explosion-proof valve is arranged at the first end, and the second explosion-proof valve is arranged at the third end; or, the first explosion-proof valve is arranged at the second end, and the second explosion-proof valve is arranged at the fourth end.

[0025] The combined battery cell module provided in the present application arranges multiple first battery cells and multiple second battery cells according to a predetermined rule to form a battery cell module, and sets the first explosion-proof valve and the second explosion-proof valve at the same end of the battery cell module, so that the pressure relief directions of the multiple first explosion-proof valves and the multiple second explosion-proof valves are toward the same side of the battery cell module, which can effectively limit the control area of ​​the explosion-proof valve spray after thermal runaway occurs, and reduce the scope of disorderly spread of thermal runaway in the battery pack, which is difficult to control and leads to the risk of serious consequences.

[0026] The battery pack provided in the present application includes the combined battery cell module described above. Therefore, the location of the explosion-proof valve is reasonably planned through the combined battery cell module to limit the radiation area after thermal runaway occurs, thereby avoiding very serious consequences caused by the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of the structure of a combined battery cell module provided in an embodiment of the present application;

[0029] Figure 2 Another structural schematic diagram of the combined battery cell module provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of the structure of a second battery cell of the combined battery cell module provided in an embodiment of the present application;

[0031] Figure 4 A schematic diagram of the structure of a first battery cell of a combined battery cell module provided in an embodiment of the present application;

[0032] Figure 5 This is another structural schematic diagram of the first battery cell of the combined battery cell module provided in an embodiment of the present application.

[0033] Reference numerals:

[0034] 1-first battery cell, 101-first end, 102-second end, 103-first negative electrode column, 104-first positive electrode column, 2-second battery cell, 201-third end, 202-fourth end, 203-second positive electrode column, 2031-first fixing portion, 2032-first extending portion, 204-second negative electrode column, 2041-second fixing portion, 2042-second extending portion, 3-first explosion-proof valve, 4-second explosion-proof valve, 5-first traceability component, 6-second traceability component, a-first direction, b-second direction. DETAILED DESCRIPTION

[0035] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0036] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0037] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0038] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] Refer to the following Figures 1 to 5 Describe the combined battery cell module and battery pack described in the embodiments of the present application.

[0041] See also Figures 1 to 5 As shown, an embodiment of the present application provides a combined battery cell module, which includes: a first battery cell 1, a second battery cell 2, a first explosion-proof valve 3 and a second explosion-proof valve 4. The number of first battery cells 1, the number of second battery cells 2, the number of first explosion-proof valves 3 and the number of second explosion-proof valves 4 are all multiple, and the multiple first battery cells 1 are arranged in sequence along the first direction a at intervals, and the multiple second battery cells 2 are also arranged in sequence along the first direction a at intervals, and a first battery cell 1 is arranged between any two adjacent second battery cells 2, and a second battery cell 2 is arranged between any two adjacent first battery cells 1. The multiple first battery cells 1 and the multiple second battery cells 2 are arranged in sequence along the first direction a in an alternating arrangement order of second battery cell 2-first battery cell 1-second battery cell 2... Preferably, each first battery cell 1 is spaced apart from the adjacent second battery cell 2, and correspondingly, each second battery cell 2 is also spaced apart from the adjacent first battery cell 1.

[0042] The number of first explosion-proof valves 3 is not less than the number of first battery cells 1. Preferably, the number of first explosion-proof valves 3 is the same as the number of first battery cells 1, and each first battery cell 1 is provided with a first explosion-proof valve 3. The number of second explosion-proof valves 4 is not less than the number of second battery cells 2. Preferably, the number of second explosion-proof valves 4 is the same as the number of second battery cells 2, and each second battery cell 2 is provided with a second explosion-proof valve 4.

[0043] Taking one of the first battery cells 1 and one of the second battery cells 2 as examples, the first battery cell 1 has a first end 101 and a second end 102 distributed along the second direction b, and the second battery cell 2 has an end and a fourth end 202 distributed along the second direction b, wherein the first end 101 and the third end 201 are arranged in sequence along the first direction a, and the second end 102 and the fourth end 202 are arranged in sequence along the first direction a, and multiple first battery cells 1 and multiple second battery cells 2 are arranged in this way, and the second end 102 of each first battery cell 1 is provided with a first explosion-proof valve 3, and the fourth end 202 of each second battery cell 2 is provided with a second explosion-proof valve 4; or, the first end 101 of each first battery cell 1 is provided with a first explosion-proof valve 3, and the third end 201 of each second battery cell 2 is provided with a second explosion-proof valve 4, so that multiple first explosion-proof valves 3 and multiple second explosion-proof valves 4 are arranged alternately in sequence along the first direction a. Preferably, in this embodiment, the first explosion-proof valve 3 is provided at the second end 102, and the second explosion-proof valve 4 is provided at the second end 102.

[0044] It should be noted that the first direction a and the second direction b are two directions perpendicular to each other.

[0045] It can be seen that the combined battery cell module provided in the present application arranges multiple first battery cells 1 and multiple second battery cells 2 according to a predetermined rule to form a battery cell module, and sets the first explosion-proof valve 3 and the second explosion-proof valve 4 at the same end of the battery cell module, so that the pressure relief directions of the multiple first explosion-proof valves 3 and the multiple second explosion-proof valves 4 are toward the same side of the battery cell module, which can effectively limit the control area of ​​the explosion-proof valve spray after thermal runaway occurs, and reduce the scope of disorderly spread of thermal runaway in the battery pack, which is difficult to control and leads to the risk of serious consequences.

[0046] Furthermore, the first battery cell 1 includes a first shell, which has a rectangular structure, including four side walls and two end faces, the four side walls include two large faces with the same area and the largest area, the two large faces are arranged facing the second battery cell 2, and the other two of the four side walls are side faces. The length of the first shell extends along the second direction b, the two large faces are distributed along the first direction a, and the first direction a corresponds to the width direction of the first shell, and the two end faces of the first shell are distributed along the first direction a, and the two end faces correspond to the first end 101 and the second end 102 of the first battery cell 1.

[0047] Preferably, if Figure 4 As shown, the length L1 of the first shell is 200 mm to 800 mm, the height H1 of the first shell is 60 mm to 100 mm, and the width W1 of the first shell is 12 mm to 20 mm.

[0048] The first battery cell 1 also includes a first positive electrode column 104, a first negative electrode column 103 and a first electrode group, wherein the first electrode group is arranged in the first shell, the first positive electrode column 104 and the second negative electrode column 204 are electrically connected to the electrode group respectively, the first positive electrode column 104 and the first negative electrode column 103 are distributed at both ends of the first shell, the first positive electrode column 104 is arranged on the second end 102, and the first negative electrode column 103 is arranged on the first end 101.

[0049] Furthermore, the second battery cell 2 includes a second shell, which has a rectangular structure, including four side walls and two end faces. The four side walls include two large faces with the same area and the largest area. The two large faces are arranged facing the first battery cell 1, and the other two of the four side walls are side faces. The length of the second shell extends along the second direction b, and the two large faces are distributed along the first direction a, and the first direction a corresponds to the width direction of the second shell. The two end faces of the second shell are distributed along the first direction a, and the two end faces correspond to the third end 201 and the fourth end 202 of the second battery cell 2.

[0050] Preferably, if Figure 3 As shown, the length L2 of the second shell is 200mm-800mm, the height H2 of the second shell is 60mm-100mm, and the width W2 of the second shell is 12mm-20mm. It can be seen that the second shell has the same shape and size as the first shell, which facilitates the assembly of multiple first battery cells 1 and multiple second battery cells 2 and the assembly to the battery pack shell.

[0051] The second battery cell 2 also includes a second positive electrode column 203, a second negative electrode column 204 and a second electrode group, wherein the second electrode group is arranged in the second shell, the second positive electrode column 203 and the second negative electrode column 204 are electrically connected to the electrode group respectively, the second positive electrode column 203 is arranged at the third end 201 of the second battery cell 2, and the second negative electrode column 204 is arranged at the fourth end 202 of the second battery cell 2. Such an arrangement makes it possible for the first battery cells 1 and the second battery cells 2 to be arranged alternately, the first positive electrode column 104 and the second negative electrode column 204 to be located at the same end and arranged adjacently, and the first negative electrode column 103 and the second positive electrode column 203 to be located at the same end and arranged adjacently, so that two adjacent second battery cells 2 are connected in series with the first battery cell 1, and the second battery cells 2 and the first battery cells 1 are connected in series one by one in sequence.

[0052] Further, the second positive electrode column 203 includes a first fixing portion 2031 and a first extending portion 2032, wherein the first fixing portion 2031 is fixed to the third end 201, preferably, the first fixing portion 2031 is fixed to the second battery cell 2 during the processing stage of the second battery cell 2, and the fixing method can be welding, riveting, or a combination of the two methods. The first extending portion 2032 is connected to the first fixing portion 2031, preferably, the first extending portion 2032 and the first fixing portion 2031 have an integral structure, and the first extending portion 2032 extends and connects along the first direction a toward the first negative electrode column 103 of the next first battery cell 1, so as to connect the two adjacent second positive electrode columns 203 and the first negative electrode column 103 in series, and the connection method between the first extending portion 2032 and the first negative electrode column 103 can be welding, riveting, or a combination of the two methods.

[0053] The first extension portion 2032 protrudes by a predetermined width F relative to the large surface of one side of the second battery cell 2, ensuring that the first extension portion 2032 can extend toward the adjacent first negative electrode column 103, and the first extension portion 2032 can also limit the distance between the large surfaces of the adjacent first battery cell 1 and the large surfaces of the second battery cell 2. Specifically, in the present embodiment, the large surface of the first shell and the large surface of the second shell are opposite to each other and are arranged in parallel and spaced apart, so that a predetermined spacing S is formed between any adjacent second battery cell 2 and any adjacent first battery cell 1, preferably, 0.3mm≤S≤1mm, and more preferably, F=S+W2 / 2. Such a design can maintain a spacing between each first battery cell 1 and each second battery cell 2 after the first extension portion 2032 is connected to the first negative electrode column 103, and the gap between the two battery cells will not be less than the predetermined spacing S. The predetermined spacing S can reserve expansion space for the first battery cell 1 and / or the second battery cell 2, thereby ensuring the cycle life of the first battery cell 1 and the second battery cell 2. The reserved spacing S can also be used for heat dissipation to improve the heat dissipation effect between the battery cells.

[0054] Preferably, a first step portion is provided between the first fixing portion 2031 and the first extension portion 2032, and the first step portion forms a bending step between the first fixing portion 2031 and the first extension portion 2032, so that the first extension portion 2032 can approach the first negative electrode column 103 while extending toward the first negative electrode column 103 of the adjacent first battery cell 1, so that the first extension portion 2032 can fit with the first negative electrode column 103, facilitate the connection between the two, and ensure the connection stability between the two. More preferably, the first fixing portion 2031, the first step portion and the first extension portion 2032 have an integrated structure.

[0055] Similarly, the second negative electrode column 204 includes a second fixing portion 2041, a second step portion and a second extension portion 2042. The structure of the second negative electrode column 204 and the connection method between the second negative electrode column 204 and the first positive electrode column 104 can refer to the above content, which can be fully understood by those skilled in the art and will not be repeated here.

[0056] It can be seen that the combined battery cell module provided in the present application realizes direct connection between the first battery cell 1 and the second battery cell 2 through the pole, reduces the use and connection of conductive bars between battery cells, simplifies the assembly process of the combined battery cell module, and reduces processing costs.

[0057] Furthermore, the combined battery cell module also includes a first traceability component 5 and a second traceability component 6. The first traceability component 5 and the second traceability component 6 are specifically battery cell traceability codes that record reserved information. The first traceability component 5 is arranged on the first battery cell 1, and the fixing method can be but is not limited to pasting. The second traceability component 6 is arranged on the second battery cell 2, and the fixing method can be but is not limited to pasting.

[0058] Each first battery cell 1 is provided with a first traceability component 5, and each second battery cell 2 is provided with a second traceability component 6. A total of multiple first traceability components 5 and multiple second traceability components 6 are arranged alternately along the first direction a with the first battery cell 1 and the second battery cell 2. When the first traceability component 5 is provided at the second end 102 of the first battery cell 1, the second traceability component 6 is provided at the fourth end 202 of the second battery cell 2. Preferably, in this embodiment, the first traceability component 5 is provided at the first end 101 of the first battery cell 1, and the second traceability component 6 is provided at the fourth end 202 of the second battery cell 2. The third end 201 of the second battery cell 2, on each first battery cell 1, the first traceability component 5 and the first explosion-proof valve 3 are distributed at both ends of the first shell, and on each second battery cell 2, the second traceability component 6 and the second explosion-proof valve 4 are distributed at both ends of the second shell, and multiple first explosion-proof valves 3 and multiple second explosion-proof valves 4 are arranged at the same end of the combined battery cell module, and multiple first traceability components 5 and multiple second traceability components 6 are arranged at the other end of the combined battery cell module, which ensures the uniformity of the explosion-proof valve of the combined battery cell module after assembly.

[0059] To summarize, the combined battery cell module provided in the present application arranges multiple first battery cells 1 and multiple second battery cells 2 according to a predetermined rule to form a battery cell module, and sets the first explosion-proof valve 3 and the second explosion-proof valve 4 at the same end of the battery cell module, so that the pressure relief directions of the multiple first explosion-proof valves 3 and the multiple second explosion-proof valves 4 are toward the same side of the battery cell module, which can effectively limit the control area of ​​the explosion-proof valve spray after thermal runaway occurs, and reduce the scope of disorderly spread of thermal runaway in the battery pack, which is difficult to control and leads to the risk of serious consequences.

[0060] In addition, the combined battery cell module provided in the present application realizes direct connection between the first battery cell 1 and the second battery cell 2 through the pole, reduces the use and connection of conductive bars between battery cells, simplifies the assembly process of the combined battery cell module, and reduces processing costs.

[0061] An embodiment of the present application also provides a battery pack, including the combined battery cell module described in any of the above embodiments, and thus has all the beneficial technical effects of the combined battery cell module, which will not be repeated here.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A combined battery cell module, characterized in that: include: A first battery cell, wherein the number of the first battery cells is multiple; the multiple first battery cells are spaced apart along a first direction; the first battery cell has a first end and a second end distributed along a second direction different from the first direction; a second battery cell, wherein the number of the second battery cells is multiple, the multiple second battery cells are arranged at intervals along the first direction, and one first battery cell is arranged between any two adjacent second battery cells; the second battery cell has a third end and a fourth end distributed along the second direction; the multiple first ends and the multiple third ends are arranged at intervals along the first direction; A first explosion-proof valve and a second explosion-proof valve, wherein the first explosion-proof valve is arranged at the first end, and the second explosion-proof valve is arranged at the third end; or, the first explosion-proof valve is arranged at the second end, and the second explosion-proof valve is arranged at the fourth end.

2. The combined battery cell module according to claim 1, characterized in that: The first battery cell includes a first positive electrode column and a first negative electrode column, the first positive electrode column is arranged at the second end, and the first negative electrode column is arranged at the first end; The second battery cell includes a second positive electrode column and a second negative electrode column, the second positive electrode column is arranged at the third end, and the second negative electrode column is arranged at the fourth end; The first end and the third end are arranged at intervals along the first direction, and the second end and the fourth end are arranged at intervals along the first direction.

3. The combined battery cell module according to claim 2, characterized in that: The second positive electrode column comprises a first fixing portion and a first extending portion, the first fixing portion is fixed to the third end, and the first extending portion extends along the first direction toward the adjacent first negative electrode column; The second negative electrode column includes a second fixing portion and a second extending portion, the second fixing portion is fixed to the fourth end, and the second extending portion extends along the first direction toward the adjacent first positive electrode column.

4. The combined battery cell module according to claim 3, characterized in that: A first step portion is provided between the first fixing portion and the first extending portion; and a second step portion is provided between the second fixing portion and the second extending portion.

5. The combined battery cell module according to claim 3, characterized in that: The first battery cell further includes a first shell, the first shell has a rectangular parallelepiped structure, the length L1 of the first shell is 200 mm to 800 mm, the height H1 of the first shell is 60 mm to 100 mm, and the width W1 of the first shell is 12 mm to 20 mm; The second battery cell further includes a second shell, the second shell has a rectangular parallelepiped structure, a length L2 of the second shell is 200 mm to 800 mm, a height H2 of the second shell is 60 mm to 100 mm, and a width W2 of the second shell is 12 mm to 20 mm.

6. The combined battery cell module according to claim 5, characterized in that: A predetermined interval S is formed between the second battery cell and the adjacent first battery cell, wherein 0.3 mm≤S≤1 mm.

7. The combined battery cell module according to claim 5, characterized in that: The second shell further includes a side wall, and the first protruding portion and the second protruding portion protrude relative to the side wall by a predetermined width F along the first direction, wherein F=S+W2 / 2.

8. The combined battery cell module according to claim 1, characterized in that: The combined battery cell module further includes a first traceability component and a second traceability component; The first traceability component is arranged at the first end, and the second traceability component is arranged at the third end; or the first traceability component is arranged at the second end, and the second traceability component is arranged at the fourth end.

9. The combined battery cell module according to any one of claims 1 to 8, characterized in that: The first direction and the second direction are perpendicular to each other; The first direction is a width direction of the first battery cell and the second battery cell, and the second direction is a length direction of the first battery cell and the second battery cell.

10. A battery pack, characterized in that: A combined battery cell module comprising any one of claims 1 to 9.

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