Battery cell assembly, battery and electric equipment

Abstract

The utility model discloses a battery cell assembly, a battery and electric equipment. The battery cell assembly comprises a battery cell and an outer wrapping film, each outer surface of the battery cell is covered with the outer wrapping film, the outer wrapping film is provided with a windowing hole, and the windowing hole penetrates through the outer wrapping film in the thickness direction of the outer wrapping film. According to the battery core assembly disclosed by the utility model, the requirements on the coating process and the position degree of the outer coating film without the window hole on the surface of the battery core can be reduced, so that the requirements on the coating process and the position degree of the outer coating film are reduced, and the window hole can be better covered with the adhesive, and the risk of insulation failure of the battery core is further reduced.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, and in particular to a battery core assembly, a battery and an electrical device. Background Art

[0002] The outer film of the battery cell (blue film) covers the surface of the battery cell to insulate and protect the battery cell. The colloid used to bond the battery cell will cause the bonding strength and thermal conductivity to decrease when it is in direct contact with the outer film. For this reason, one surface of the battery cell in the related art is a window surface, and the window surface has a window area. A portion of the outer film of the battery cell on multiple surfaces adjacent to the window surface of the battery cell covers a portion of the window surface and encloses to form a window hole, and the portion of the window surface opposite to the window hole forms a window area. The colloid is in direct contact with the battery cell through the window hole to improve the bonding strength and thermal conductivity of the colloid.

[0003] However, the risk of battery cell insulation failure in related technologies is relatively high. Utility Model Content

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] The window opening method in the related art has high requirements on the laminating process of the battery cell outer film on multiple surfaces adjacent to the window opening surface and the positioning accuracy of the battery cell outer film. When the laminating process of the battery cell outer film on multiple surfaces adjacent to the window opening surface and the positioning accuracy of the battery cell outer film fail to meet the requirements, the window opening will be offset, making it difficult for some exposed battery cells to be covered by the colloid, and thus causing a greater risk of battery cell insulation failure.

[0006] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, an embodiment of the utility model proposes a battery cell assembly, which can reduce the requirements for the lamination process of the outer film and the positioning accuracy of the outer film, so as to reduce the risk of insulation failure of the battery cell.

[0008] The embodiment of the utility model further provides a battery including the battery cell assembly of the above embodiment.

[0009] The embodiment of the utility model also provides an electrical device including the battery of the above embodiment.

[0010] The battery cell assembly of the embodiment of the utility model comprises a battery cell and an outer film. The outer film covers each outer surface of the battery cell, and the outer film is provided with a window hole, and the window hole penetrates the outer film along the thickness direction of the outer film.

[0011] The battery cell assembly of the embodiment of the utility model has at least the following beneficial effects: the battery cell assembly of the embodiment of the utility model can reduce the requirements for the laminating process and positioning of the outer packaging film on the surface of the battery cell without window holes, so as to reduce the requirements for the laminating process and positioning of the outer packaging film, thereby enabling the adhesive to better cover the window holes, thereby reducing the risk of insulation failure of the battery cell.

[0012] In some embodiments, the window holes are square holes, and each two adjacent inner walls of the window holes are connected by chamfers.

[0013] In some embodiments, the window hole is a circular hole or an elliptical hole.

[0014] In some embodiments, a plurality of the window holes are provided, and the plurality of the window holes are spaced apart along a preset direction.

[0015] In some embodiments, the plurality of window openings are evenly spaced apart.

[0016] In some embodiments, the outer envelope includes a plurality of film bodies, the plurality of film bodies correspondingly cover the plurality of outer surfaces of the battery core one by one, and at least one of the plurality of film bodies has the window hole.

[0017] In some embodiments, at least two of the plurality of membranes have the window openings.

[0018] In some embodiments, the battery cell includes a first outer surface, a second outer surface, a third outer surface, a fourth outer surface, a fifth outer surface and a sixth outer surface, the first outer surface and the second outer surface are arranged opposite to each other in the length direction of the battery cell, the electrode terminals of the battery cell are arranged on the first outer surface and / or the second outer surface, the third outer surface and the fourth outer surface are arranged opposite to each other in the thickness direction of the battery cell, the fifth outer surface and the sixth outer surface are arranged opposite to each other in the width direction of the battery cell, and the surface area of ​​the third outer surface and the surface area of ​​the fourth outer surface are both greater than the surface area of ​​the fifth outer surface and the surface area of ​​the sixth outer surface; the plurality of film bodies include a first film body, a second film body, a third film body, a fourth film body, a fifth film body and a sixth film body, the first film body covers the first outer surface, the second film body covers the second outer surface, the third film body covers the third outer surface, the fourth film body covers the fourth outer surface, the fifth film body covers the fifth outer surface, and the sixth film body covers the sixth outer surface.

[0019] In some embodiments, one of the third film body, the fourth film body, the fifth film body and the sixth film body is provided with the window hole.

[0020] In some embodiments, the third film body and the fourth film body are both provided with the window holes, or the fifth film body and the sixth film body are both provided with the window holes.

[0021] The battery of the embodiment of the utility model comprises a shell and a battery core assembly as described in the above embodiment, wherein the battery core assembly is bonded into the shell by bonding colloid.

[0022] The battery of the embodiment of the utility model has at least the following beneficial effects: the battery of the embodiment of the utility model can reduce the risk of insulation failure of the battery cell, thereby reducing the risk of insulation failure of the battery of the embodiment of the utility model, and improving the operating stability of the battery of the embodiment of the utility model. In addition, because the adhesive can better cover the window hole, the battery cell can be more firmly bonded to the shell through the adhesive, thereby preventing the battery cell from detaching from the shell, and further improving the operating stability of the battery.

[0023] In some embodiments, the shell includes a first shell and a second shell, the first shell and the second shell are arranged relatively to each other along the width direction or the thickness direction of the battery cell, the adhesive colloid includes a first colloid and a second colloid, the battery cell is bonded to one of the first shell and the second shell through the first colloid, and the battery cell is bonded to the other of the first shell and the second shell through the second colloid.

[0024] The electric device of the embodiment of the utility model comprises an electric device and the battery as described in the above embodiment, and the battery cooperates with the electric device to supply power to the electric device.

[0025] The electrical equipment of the embodiments of the utility model has at least the following beneficial effects: the electrical equipment of the embodiments of the utility model, including the battery of the above embodiments, has a lower risk of insulation failure and a higher operational stability, thereby reducing the failure risk of the electrical components of the embodiments of the utility model and improving the operational stability of the electrical components of the embodiments of the utility model, thereby reducing the failure risk of the electrical equipment of the embodiments of the utility model and improving the operational stability of the electrical equipment of the embodiments of the utility model.

[0026] In some embodiments, the electrical device is a vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a battery core assembly according to an embodiment of the utility model.

[0028] Figure 2 It is a schematic diagram of the battery cell assembly from another perspective of an embodiment of the utility model.

[0029] Figure 3 It is a schematic diagram of the battery cell assembly from another perspective of an embodiment of the utility model.

[0030] Figure 4 It is a partial schematic diagram of a battery core assembly according to an embodiment of the utility model.

[0031] Figure 5 It is a schematic diagram of a battery core assembly according to another embodiment of the utility model.

[0032] Reference numerals:

[0033] 100. Battery cell assembly;

[0034] 1. Battery cell; 11. Positive electrode column; 12. Negative electrode column; 13. Electrode terminal;

[0035] 2. Outer membrane; 21. Membrane body; 22. First membrane body; 23. Second membrane body; 24. Third membrane body; 25. Fourth membrane body; 26. Fifth membrane body; 27. Sixth membrane body; 28. Window hole. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0037] The battery cell assembly 100, the battery and the electrical equipment according to the embodiment of the utility model are described below with reference to the accompanying drawings.

[0038] like Figure 1 and Figure 3 As shown, the battery cell assembly 100 of the embodiment of the utility model comprises a battery cell 1 and an outer film 2. The outer film 2 covers each outer surface of the battery cell 1, and the outer film 2 is provided with a window hole 28, which penetrates the outer film 2 along the thickness direction of the outer film 2 so as to expose a part of the surface of the battery cell 1. The adhesive colloid used for bonding the battery cell 1 directly contacts the battery cell 1 through the window hole 28 to improve the bonding strength and / or thermal conductivity of the adhesive colloid.

[0039] It should be noted that the window hole 28 is formed in the outer film 2 , which means that a portion of the outer film 2 is removed to form the window hole 28 on the outer film 28 .

[0040] In the related art, when the laminating process and positioning accuracy of one of the battery cell outer films on multiple surfaces adjacent to the window opening of the battery cell do not meet the requirements, the window will be offset, making it difficult for the partially exposed battery cell to be covered by the colloid. Therefore, the related art has higher requirements for the laminating process and positioning accuracy of the battery cell outer film on each surface adjacent to the window opening.

[0041] The battery cell assembly 100 of the embodiment of the utility model has higher requirements for the laminating process and position accuracy of the outer film 2 with the window hole 28, while the laminating process and position accuracy of the outer film 2 on other surfaces are relatively low. Compared with the related art, the battery cell assembly 100 of the embodiment of the utility model can reduce the laminating process and position accuracy requirements of the outer film 2 without the window hole 28, thereby reducing the laminating process and position accuracy requirements of the outer film 2, so that the adhesive can better cover the window hole 28, thereby reducing the risk of insulation failure of the battery cell 1.

[0042] The battery cell assembly 100 of the embodiment of the utility model can reduce the requirements for the laminating process and positioning of the outer film 2 on the surface of the battery cell 1 without the window hole 28, so as to reduce the requirements for the laminating process and positioning of the outer film 2, so that the adhesive can better cover the window hole 28, thereby reducing the risk of insulation failure of the battery cell 1.

[0043] The battery of the embodiment of the utility model comprises a shell and a battery cell assembly 100 as in the above embodiment. The battery cell assembly 100 is bonded into the shell by an adhesive colloid so as to bond and fix the battery cell assembly 100 into the shell.

[0044] The battery of the embodiment of the utility model is bonded to the housing by bonding the battery cell assembly 100 of the above embodiment, and the bonding adhesive can better cover the window hole 28 to reduce the risk of insulation failure of the battery cell 1, thereby further improving the operating stability of the battery of the embodiment of the utility model. Moreover, because the bonding adhesive can better cover the window hole 28, the battery cell 1 can be more firmly bonded to the housing by the bonding adhesive, thereby preventing the battery cell 1 from detaching from the housing, thereby further improving the operating stability of the battery.

[0045] The battery of the embodiment of the utility model can reduce the risk of insulation failure of the battery 1, thereby reducing the risk of insulation failure of the battery of the embodiment of the utility model, and improving the operating stability of the battery of the embodiment of the utility model. In addition, because the adhesive can better cover the window hole 28, the battery 1 can be more firmly bonded to the shell through the adhesive, thereby preventing the battery 1 from detaching from the shell, and further improving the operating stability of the battery.

[0046] In some embodiments, the shell includes a first shell and a second shell, the first shell and the second shell are arranged relatively to each other along the width direction or the thickness direction of the battery cell, the adhesive colloid includes a first colloid and a second colloid, the battery cell 1 is bonded to one of the first shell and the second shell through the first colloid, and the battery cell 1 is bonded to the other of the first shell and the second shell through the second colloid, so as to fix the battery cell 1 through the first colloid and the second colloid.

[0047] Optionally, the first colloid is a structural adhesive or a thermally conductive adhesive, and the second colloid is a structural adhesive or a thermally conductive adhesive. The battery cell 1 can be fixed by the structural adhesive and the thermally conductive adhesive.

[0048] When the ambient temperature is too low, the heat can be conducted to the battery cell 1 through the thermal conductive adhesive to increase the temperature of the battery cell 1, thereby avoiding reducing the life and endurance of the battery of the embodiment of the utility model when the temperature is too low.

[0049] When the temperature of the battery core 1 is too high, the heat of the battery core 1 can be conducted away through the thermal conductive adhesive, thereby preventing the excessive temperature from affecting the life and endurance of the battery of the embodiment of the utility model.

[0050] The electric device of the embodiment of the utility model comprises an electric device and a battery as in the above embodiment, and the battery cooperates with the electric device to supply power to the electric device.

[0051] The electrical equipment of the embodiment of the utility model, including the battery of the above embodiment, has a lower risk of insulation failure and a higher operational stability, thereby reducing the failure risk of the electrical components of the embodiment of the utility model and improving the operational stability of the electrical components of the embodiment of the utility model, thereby reducing the failure risk of the electrical equipment of the embodiment of the utility model and improving the operational stability of the electrical equipment of the embodiment of the utility model.

[0052] In some embodiments, the electric device is a vehicle.

[0053] The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, etc.

[0054] The vehicle of the embodiment of the utility model, including the battery of the above embodiment, can reduce the failure risk and operation stability of electrical equipment.

[0055] In some specific embodiments, the electrical device of the vehicle is a circuit system, and the battery in the above embodiment is used as an operating power source of the circuit system to supply power to the circuit system. For example, it is used for the working power demand during the start-up, navigation and operation of the vehicle. By providing the battery in the above embodiment, the operation stability of the circuit system is improved and the failure risk of the circuit system is reduced.

[0056] In other specific embodiments, the electrical device of the vehicle is a motor, and the battery of the above embodiment is used as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle. The battery of the above embodiment is provided to provide a stable driving power for the vehicle.

[0057] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the window hole 28 is a square hole, and every two adjacent inner walls of the window hole 28 are connected by chamfering.

[0058] It should be noted that the square hole can be a square hole or a rectangular hole (rectangular hole).

[0059] The chamfer of the window hole 28 can reduce the stress of the outer membrane 2 and avoid stress cracking of the outer membrane 2.

[0060] In some embodiments, the fenestration hole 28 is a circular hole or an elliptical hole.

[0061] The circular or elliptical window holes 28 can reduce the stress of the outer membrane 2 and avoid stress cracking of the outer membrane 2.

[0062] like Figure 1 and Figure 3 As shown, in some embodiments, a plurality of window holes 28 are provided, and the plurality of window holes 28 are spaced apart along a preset direction.

[0063] The window holes 28 are provided with a plurality of holes, which can reduce the size of the window holes 28 so that the adhesive colloid can easily cover the window holes 28, thereby reducing the position requirements of the outer film 2. In addition, the window holes 28 are provided with a plurality of holes, which can increase the contact points between the adhesive colloid and the battery cell 1, thereby improving the bonding strength and / or thermal conductivity of the adhesive colloid.

[0064] The plurality of window holes 28 are arranged at intervals along a preset direction, so that the position of each window hole 28 can be easily determined, thereby ensuring the position accuracy of the outer packaging film 2 when the outer packaging film 2 is applied.

[0065] Optionally, the preset direction is the length direction of the battery cell 1 .

[0066] like Figure 1 As shown, as an example, the length direction of the battery cell 1 is shown by the arrow at A.

[0067] like Figure 1 As shown, optionally, 5 to 50 window holes 28 are provided. For example, 20 window holes 28 are provided, and the 20 window holes 28 are arranged at intervals along the length direction of the battery cell 1. By reducing the size of the window holes 28, the adhesive colloid is easy to cover the window holes 28, thereby reducing the position requirements of the outer film 2. By setting 20 window holes 28, the bonding strength and thermal conductivity of the adhesive colloid are increased. The 20 window holes 28 are arranged at intervals along the preset direction to facilitate determining the position of each window hole 28, thereby facilitating ensuring the position of the outer film 2 when the outer film 2 is applied. The 20 window holes 28 can make the size of the window holes 28 and the contact area between the adhesive colloid and the battery cell 1 more reasonable, so that the position requirements of each window hole 28 are lower, and the bonding strength and / or thermal conductivity of the adhesive colloid are higher.

[0068] like Figure 1 and Figure 3As shown, in some embodiments, a plurality of window holes 28 are evenly spaced apart to further facilitate determining the position of each window hole 28 , thereby further facilitating ensuring the position of the outer envelope 2 when the outer envelope 2 is applied.

[0069] like Figure 1 As shown, in some embodiments, the outer film 2 includes a plurality of film bodies 21, and the plurality of film bodies 21 cover the plurality of outer surfaces of the battery cell 1 one by one, and at least one of the plurality of film bodies 21 has a window hole 28, so that the adhesive colloid can contact the battery cell 1 through the window hole 28, thereby improving the bonding strength and thermal conductivity of the adhesive colloid bonded to the battery cell 1.

[0070] In some embodiments, at least two of the plurality of film bodies 21 are provided with window holes 28 so that at least two surfaces of the battery cell 1 can be fixed to the housing, thereby increasing the connection strength between the battery cell 1 and the housing.

[0071] like Figure 1 and Figure 2 As shown, in some embodiments, the battery cell 1 includes a first outer surface, a second outer surface, a third outer surface, a fourth outer surface, a fifth outer surface and a sixth outer surface, the first outer surface and the second outer surface are arranged relative to each other in the length direction of the battery cell 1, the electrode terminal 13 of the battery cell 1 is arranged on the first outer surface and / or the second outer surface, the third outer surface and the fourth outer surface are arranged relative to each other in the thickness direction of the battery cell 1, the fifth outer surface and the sixth outer surface are arranged relative to each other in the width direction of the battery cell, and the surface areas of the third outer surface and the fourth outer surface are both greater than the surface areas of the fifth outer surface and the sixth outer surface.

[0072] The electrode terminal 13 of the battery cell 1 includes a positive electrode column 11 and a negative electrode column 12. The positive electrode column 11 and the negative electrode column 12 can be located on the same outer surface of the battery cell 1. For example, the positive electrode column 11 and the negative electrode column 12 are both located on the first outer surface. For another example, the positive electrode column 11 and the negative electrode column 12 are both located on the second outer surface. The positive electrode column 11 and the negative electrode column 12 can be located on different outer surfaces of the battery cell 1. For example, the positive electrode column 11 is located on the first outer surface and the negative electrode column 12 is located on the second outer surface. For another example, the positive electrode column 11 is located on the second outer surface and the negative electrode column 12 is located on the first outer surface.

[0073] The multiple film bodies 21 include a first film body 22, a second film body 23, a third film body 24, a fourth film body 25, a fifth film body 26 and a sixth film body 27. The first film body 22 covers the first outer surface, the second film body 23 covers the second outer surface, the third film body 24 covers the third outer surface, the fourth film body 25 covers the fourth outer surface, the fifth film body 26 covers the fifth outer surface, and the sixth film body 27 covers the sixth outer surface.

[0074] The first outer surface, the second outer surface, the third outer surface, the fourth outer surface, the fifth outer surface and the sixth outer surface are respectively covered by arranging the first film body 22, the second film body 23, the third film body 24, the fourth film body 25, the fifth film body 26 and the sixth film body 27 to insulate and protect the battery cell 1.

[0075] like Figure 1 As shown, as an example, the length direction of the battery cell 1 is indicated by the arrow at A, the thickness direction of the battery cell 1 is indicated by the arrow at B, and the width direction of the battery cell 1 is indicated by the arrow at C.

[0076] In some embodiments, one of the third film body 24, the fourth film body 25, the fifth film body 26 and the sixth film body 27 is provided with a window hole 28, so that the adhesive colloid can contact the battery cell 1 through the window hole 28, thereby improving the bonding strength and thermal conductivity of the adhesive colloid bonded to the battery cell 1.

[0077] like Figure 1 As shown, in some specific embodiments, the fifth film body 26 is provided with a window hole 28, a portion of the adhesive colloid covers the window hole 28 and is in direct contact with the fifth outer surface through the window hole 28, and another portion of the adhesive colloid is in direct contact with the fifth film body 26, so that the battery cell 1 can be more firmly bonded to the shell.

[0078] like Figure 5 As shown, in other specific embodiments, the sixth film body 27 is provided with a window hole 28, a portion of the adhesive colloid covers the window hole 28 and is in direct contact with the sixth outer surface through the window hole 28, and another portion of the adhesive colloid is in direct contact with the sixth film body 27, so that the battery cell 1 can be more firmly bonded to the shell.

[0079] In other specific embodiments, the third film body 24 is provided with a window hole 28, a portion of the adhesive colloid covers the window hole 28 and is in direct contact with the third outer surface through the window hole 28, and another portion of the adhesive colloid is in direct contact with the third film body 24, so that the battery cell 1 can be more firmly bonded to the shell.

[0080] In other specific embodiments, the fourth film body 25 is provided with a window hole 28, a portion of the adhesive colloid covers the window hole 28 and is in direct contact with the fourth outer surface through the window hole 28, and another portion of the adhesive colloid is in direct contact with the fourth film body 25, so that the battery cell 1 can be more firmly bonded to the shell.

[0081] In some embodiments, the third film body 24 and the fourth film body 25 are both provided with window holes 28 so that the third outer surface and the fourth outer surface of the battery cell 1 can be fixed to the shell, thereby increasing the connection strength between the battery cell 1 and the shell.

[0082] In some specific embodiments, the first shell is an upper shell, the second shell is a lower shell, the upper shell and the lower shell are arranged opposite to each other along the thickness direction of the battery cell, the third surface of the battery cell 1 is bonded to the upper shell by structural adhesive, and the fourth surface of the battery cell 1 is bonded to the lower shell by thermal conductive adhesive. A portion of the structural adhesive covers the window opening 28 and directly contacts the third outer surface through the window opening 28, another portion of the structural adhesive directly contacts the third film body 24, a portion of the thermal conductive adhesive covers the window opening 28 and directly contacts the fourth outer surface through the window opening 28, and another portion of the thermal conductive adhesive directly contacts the fourth film body 25, so as to achieve bonding and fixing of the battery cell 1.

[0083] In other embodiments, the fifth film body 26 and the sixth film body 27 are both provided with window holes 28 so that the fifth outer surface and the sixth outer surface of the battery cell 1 can be fixed to the shell, thereby increasing the connection strength between the battery cell 1 and the shell.

[0084] In some specific embodiments, the first shell is an upper shell, the second shell is a lower shell, the upper shell and the lower shell are arranged opposite to each other along the width direction of the battery cell, the fifth surface of the battery cell 1 is bonded to the upper shell by structural adhesive, and the sixth surface of the battery cell 1 is bonded to the lower shell by thermal conductive adhesive. A portion of the structural adhesive covers the window opening 28 and directly contacts the fifth outer surface through the window opening 28, another portion of the structural adhesive directly contacts the fifth film body 26, a portion of the thermal conductive adhesive covers the window opening 28 and directly contacts the sixth outer surface through the window opening 28, and another portion of the thermal conductive adhesive directly contacts the fifth film body 26, so as to achieve bonding and fixing of the battery cell 1.

[0085] The term "and / or" in the present invention is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0086] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0087] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0088] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0090] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0091] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A battery cell assembly, characterized in that: include: Battery cells; An outer film, the outer film covers each outer surface of the battery cell, the outer film is provided with a window hole, and the window hole penetrates the outer film along the thickness direction of the outer film; The window holes are square holes, and each two adjacent inner walls of the window holes are connected by chamfers.

2. The battery cell assembly according to claim 1, characterized in that: There are a plurality of window holes, and the plurality of window holes are spaced apart along a preset direction.

3. The battery cell assembly according to claim 2, characterized in that: The plurality of window openings are evenly spaced.

4. The battery core assembly according to claim 1, characterized in that: The outer envelope includes a plurality of film bodies, and the plurality of film bodies cover the plurality of outer surfaces of the battery core in a one-to-one correspondence, and at least one of the plurality of film bodies is provided with the window hole.

5. The battery cell assembly according to claim 4, characterized in that: At least two of the plurality of membranes have the window openings.

6. The battery cell assembly according to claim 4, characterized in that: The battery cell comprises a first outer surface, a second outer surface, a third outer surface, a fourth outer surface, a fifth outer surface and a sixth outer surface, the first outer surface and the second outer surface are arranged opposite to each other in the length direction of the battery cell, the electrode terminal of the battery cell is arranged on the first outer surface and / or the second outer surface, the third outer surface and the fourth outer surface are arranged opposite to each other in the thickness direction of the battery cell, the fifth outer surface and the sixth outer surface are arranged opposite to each other in the width direction of the battery cell, and the surface areas of the third outer surface and the fourth outer surface are both larger than the surface areas of the fifth outer surface and the sixth outer surface; The multiple film bodies include a first film body, a second film body, a third film body, a fourth film body, a fifth film body and a sixth film body, the first film body covers the first outer surface, the second film body covers the second outer surface, the third film body covers the third outer surface, the fourth film body covers the fourth outer surface, the fifth film body covers the fifth outer surface, and the sixth film body covers the sixth outer surface.

7. The battery cell assembly according to claim 6, characterized in that: The window hole is formed in one of the third film body, the fourth film body, the fifth film body and the sixth film body.

8. The battery cell assembly according to claim 6, characterized in that: The third film body and the fourth film body are both provided with the window opening, or the fifth film body and the sixth film body are both provided with the window opening.

9. A battery, characterized in that: include: case; The battery cell assembly according to any one of claims 1 to 8, wherein the battery cell assembly is bonded to the housing by an adhesive colloid.

10. The battery according to claim 9, characterized in that The shell includes a first shell and a second shell, the first shell and the second shell are arranged opposite to each other along the width direction or the thickness direction of the battery cell, the adhesive colloid includes a first colloid and a second colloid, the battery cell is adhered to one of the first shell and the second shell through the first colloid, and the battery cell is adhered to the other of the first shell and the second shell through the second colloid.

11. An electrical device, characterized in that: include: Electrical devices; The battery according to claim 9 or 10, wherein the battery cooperates with the electrical device to supply power to the electrical device.

12. The electrical equipment according to claim 11, characterized in that: The electrical equipment is a vehicle.

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