Optical fiber mounting assembly, battery cell assembly and battery pack

Abstract

The utility model relates to an optical fiber mounting assembly, a battery cell assembly and a battery pack, the optical fiber mounting assembly is applied to a battery cell, and the optical fiber mounting assembly comprises: an insulating layer, the first surface of which is provided with an optical fiber groove for accommodating an optical fiber; and the bonding layer is arranged on the first surface of the insulating layer and exposes the optical fiber groove, and the bonding layer is used for connecting the battery cell. The position of the optical fiber groove is preset, the optical fiber is placed in the optical fiber groove, the optical fiber assembly is bonded to the battery cell (or in the battery cell) through the bonding layer, the position of the optical fiber is limited through the optical fiber groove and the battery cell, and installation of the optical fiber is achieved for measurement. The optical fiber mounting device has the effects of higher optical fiber mounting efficiency and more accurate position.

Description

Technical Field

[0001] The present application relates to the technical field of optical fiber temperature measurement, and in particular to an optical fiber installation assembly, a battery core assembly and a battery pack. Background Art

[0002] At present, the power battery in electric vehicles has high requirements for the temperature of the working environment during operation. Long-term high or low temperature operation of the battery will affect the life and performance of the power battery, and in severe cases, heat diffusion will occur, leading to accidents. In order to facilitate the detection of the temperature of the power battery, the related technology will use the bonding fiber Bragg grating method to collect and detect the temperature of the battery cell.

[0003] In the related art, the optical fiber is often manually bonded to the battery core by means of high-temperature adhesive tape, which is a cumbersome task and it is difficult to ensure that the optical fiber is accurately bonded to the position. Utility Model Content

[0004] The present application is proposed to solve the above-mentioned problems. According to one aspect of the present application, a fiber optic installation assembly is provided, comprising: an insulating layer, a first surface of the insulating layer is provided with a fiber optic groove for accommodating an optical fiber; an adhesive layer, the adhesive layer is provided on the first surface of the insulating layer and exposes the fiber optic groove, and the adhesive layer is used to connect the electrical core.

[0005] Exemplarily, a plurality of the optical fiber grooves are provided on the first surface of the insulating layer, and the plurality of the optical fiber grooves are arranged in an array along a first direction, and the end openings of the optical fiber grooves are located at the ends of the insulating layer; wherein the first direction is the width direction or the length direction of the insulating layer.

[0006] Exemplarily, the optical fiber grooves located at the edges on both sides of the first direction are at a distance of 0-30 mm from the edge of the insulating layer in the first direction.

[0007] Exemplarily, the optical fiber groove includes a plurality of strip grooves and arc grooves, the strip grooves are arranged in an array along a first direction, the arc groove is arranged between two adjacent strip grooves, and the ends of the arc grooves are connected to the ends of the strip grooves; wherein the first direction is the width direction or the length direction of the insulating layer.

[0008] Exemplarily, the strip grooves located on both sides of the first direction are at a distance of 0-30 mm from the edge of the insulating layer in the first direction, and the bending radius of the arc groove is greater than 8 mm.

[0009] Exemplarily, the thickness of the insulating layer is 0.2-0.5 mm, and the thickness of the adhesive layer is 0.1-2 mm.

[0010] Exemplarily, the optical fiber includes an optical fiber body and a plurality of gratings, wherein the plurality of gratings are connected to the optical fiber body and are arranged at intervals in the optical fiber groove.

[0011] According to another aspect of the present application, a battery core assembly is provided, which includes a battery core, an optical fiber, and the above-mentioned optical fiber installation assembly, wherein the optical fiber is accommodated in the optical fiber installation assembly, and the optical fiber installation assembly is arranged on the battery core.

[0012] Exemplarily, the optical fiber installation assembly is located between the pole core and the outer shell of the battery core, the adhesive layer is bonded to the pole core, and the optical fiber in the optical fiber groove is fitted with the pole core; and / or, the adhesive layer is bonded to the inner side wall of the outer shell, and the optical fiber is fitted with the inner side wall of the outer shell.

[0013] Exemplarily, the optical fiber installation assembly is located outside the battery core, the adhesive layer is bonded to the outer shell of the battery core, and the optical fiber in the optical fiber groove is in contact with the outer wall of the outer shell; wherein the outer shell is a metal shell or an aluminum-plastic film.

[0014] According to another aspect of the present application, a battery pack is provided, comprising the above-mentioned battery cell assembly.

[0015] The optical fiber installation assembly in the present application includes an insulating layer and an adhesive layer. The optical fiber groove on the insulating layer can be used to accommodate and place the optical fiber. The optical fiber is placed in the optical fiber groove. The optical fiber assembly is bonded to the battery core (or inside the battery core) through the adhesive layer. The position of the optical fiber is limited by the optical fiber groove and the battery core to achieve the installation of the optical fiber for measurement. The position of the optical fiber groove in the present application is pre-set. Compared with manual installation using high-temperature tape, the optical fiber installation is more efficient and the position is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0017] Figure 1 A schematic diagram of optical fiber arrangement in the related art is shown.

[0018] Figure 2 A schematic structural diagram of an optical fiber installation assembly in an embodiment of the present application is shown.

[0019] Figure 3 A cross-sectional view of an optical fiber installation assembly in an embodiment of the present application is shown.

[0020] Figure 4 A schematic diagram showing a first arrangement of optical fiber grooves in an embodiment of the present application is shown.

[0021] Figure 5 A schematic diagram showing a second arrangement of optical fiber grooves in an embodiment of the present application is shown.

[0022] Figure 6 A schematic diagram of a first installation method of an optical fiber installation assembly in an embodiment of the present application is shown.

[0023] Figure 7 A schematic diagram showing a second installation method of the optical fiber installation assembly in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present application more obvious, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments of the present application described in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0025] like Figure 1 As shown in the figure, it is a schematic diagram of the optical fiber arrangement in the related art. In the related art, the optical fiber and the grating connected to the optical fiber are bonded and installed by means of high temperature tape. Because the installation is carried out manually, the installation process is cumbersome, the efficiency is low, and the installation position is prone to errors.

[0026] like Figure 2 As shown, an embodiment of the present application provides a fiber optic installation assembly, which includes: an insulation layer 1 and an adhesive layer 2.

[0027] Among them, the first surface of the insulating layer 1 is provided with a fiber optic groove 3 for accommodating the optical fiber, and the adhesive layer 2 is used to connect the battery core. The adhesive layer 2 is arranged on the first surface of the insulating layer 1 and exposes the fiber optic groove 3, that is, a gap corresponding to the fiber optic groove 3 is reserved on the adhesive layer 2, and the fiber optic groove 3 is used to accommodate the optical fiber. After the adhesive layer 2 exposes the fiber optic groove 3, it is convenient for the optical fiber and the battery core with measurement to be bonded together.

[0028] The optical fiber installation assembly in the embodiment of the present application includes an insulating layer 1 and an adhesive layer 2. The optical fiber groove 3 on the insulating layer 1 can be used to accommodate and place the optical fiber. The optical fiber is placed in the optical fiber groove 3, and the optical fiber assembly is bonded to the battery core (or in the battery core) through the adhesive layer. The position of the optical fiber is limited by the optical fiber groove and the battery core to achieve the installation of the optical fiber for measurement. The position of the optical fiber groove 3 in the present application is pre-set. Compared with manual installation using high-temperature tape, the optical fiber installation is more efficient and the position is more accurate.

[0029] Exemplarily, the insulating layer 1 is used for installing the optical fiber and also has an insulating function. The insulating layer 1 is preferably a resin material. Exemplarily, the material of the insulating layer 1 is a polyimide resin (also known as PI, and the insulating layer 1 is also known as a PI film). The adhesive layer 2 can be formed by coating an adhesive on the insulating layer 1. The type of the appropriate adhesive can be selected according to actual needs.

[0030] like Figure 3 FIG. 2 is a cross-sectional schematic diagram of the optical fiber installation assembly in the embodiment of the present application. For example, after the optical fiber is installed in the optical fiber groove 3, the surface of the optical fiber and the adhesive layer 2 are flush. After being connected to the battery core through the adhesive layer 2, the optical fiber and the battery core are bonded to detect the temperature of the battery core.

[0031] Among them, the optical fiber includes an optical fiber body and a plurality of gratings, and the plurality of gratings are connected to the optical fiber body and arranged at intervals in the optical fiber groove 3. The grating is an optical device composed of a large number of parallel slits with regularly changing spacing. Exemplarily, the grating in the embodiment of the present application is an equally spaced grating with the same spacing width of the parallel slits. A large number of parallel slits with regularly changing spacing are written on the core of the optical fiber using the photosensitivity of the optical fiber material to form a fiber grating. The flexible use of the fiber grating is that it can realize multi-point sensing, and countless fiber gratings of different wavelengths can be written in one sensor to realize distributed monitoring of the same or multiple physical parameters. Among them, the optical fiber with multiple fiber gratings is called a fiber grating string. By accurately matching the distance between the two reflection points, the light wave signal that meets the conditions is reflected by the grating, while other wavelength signals are basically not reflected. By connecting a fiber grating demodulator, the wavelength of the light wave of the independent emission wave can be measured. Once the fiber grating is affected by changes in temperature or stress field, the grating pitch will change, the wavelength of the reflected wave will also change accordingly, and different wavelengths will be emitted. These changes can be measured by an optical detector and converted into electrical signals to obtain temperature information.

[0032] Before arranging the optical fiber grooves 3 on the insulating layer 1, measurements are performed at the temperature points that need to be detected, and the positions of the measured temperature points in the entire insulating layer 1 are recorded. The positions of the various measured points are connected in series in sequence to design a reasonable path.

[0033] like Figure 4 As shown, it is the first arrangement mode of the optical fiber groove 3 in the embodiment of the present application. A plurality of optical fiber grooves 3 are provided on the first surface of the insulating layer 1, and the plurality of optical fiber grooves 3 are arranged in an array along a first direction, and the end openings of the optical fiber grooves 3 are located at the ends of the insulating layer 1; wherein, the first direction is the width direction or the length direction of the insulating layer 1. Preferably, the first direction is the width direction of the insulating layer 1, that is, the optical fiber grooves 3 are uniformly arranged in an array along the width direction of the insulating layer 1. Exemplarily, three optical fiber grooves 3 are provided on the insulating layer 1, and the two ends of the optical fiber grooves 3 are flush with the two ends of the insulating layer 1.

[0034] Optical fibers are arranged in the three optical fiber grooves 3 mentioned above. For example, after being matched with the battery cell of the power battery, the three optical fibers correspond to the upper, middle and lower positions of the battery cell respectively. Thus, the temperature information at different positions can be collected. For the battery cell, the heating of the battery cell is regular. Specifically, because the different positions of the battery cell are at different distances from the cooling structure in the battery, the temperature close to the cooling structure is lower, and the temperature far from the cooling structure is higher. According to the heating characteristics of the battery cell, the upper, middle and lower positions can cover the temperatures of all positions in the battery cell, and it is only necessary to arrange optical fibers at the upper, middle and lower positions of the battery cell. Normally, it is not necessary to arrange more optical fibers and optical fiber grooves 3. However, in actual use, more optical fibers can also be arranged on this basis, and optical fibers and optical fiber grooves 3 can be added according to actual use requirements.

[0035] Based on the above description, it is better to arrange the optical fiber grooves 3 on the insulating layer 1 evenly. Moreover, among the multiple optical fibers, the closer the distance between the optical fiber located at the edge and the edge of the core is, the more representative the detected temperature is. Therefore, when arranging the optical fiber grooves 3, the distance between the optical fiber grooves 3 on both sides and the edge of the insulating layer 1 in the first direction should also be as close as possible. Exemplarily, the distance between the optical fiber grooves 3 located at the edges on both sides of the first direction and the edge of the insulating layer 1 in the first direction is 0-30mm. Figure 4 In the figure, d1 represents the distance between the fiber slots 3 on both sides and the edge of the insulating layer 1 in the first direction. That is, the value of d1 is 0-30 mm. d2 represents the interval between two adjacent fiber slots 3. Because the width of the fiber slot 3 itself is very small (the size of the fiber slot 3 itself is enlarged in the figure for convenience of representation). The value of the interval between two adjacent fiber slots 3 (that is, d2) is (d3-2*d1) / 2, where d3 represents the width of the entire insulating layer 1.

[0036] Similarly, in some embodiments, the first direction above represents the length direction of the insulating layer 1, and d3 represents the length of the insulating layer 1. The optical fiber grooves 3 are evenly arranged along the length direction of the insulating layer 1. It should be noted that the arrangement of the optical fiber grooves 3 is still adjusted according to the corresponding battery core, and for different battery cores, the arrangement positions of the optical fiber grooves 3 and the corresponding optical fibers can be adjusted according to actual conditions.

[0037] like Figure 5 As shown, it is a second arrangement of the optical fiber groove 3 in the embodiment of the present application. The optical fiber groove 3 includes a plurality of strip grooves 31 and arc grooves 32, the strip grooves 31 are arranged in an array along the first direction, the arc groove 32 is arranged between two adjacent strip grooves 31, and the end of the arc groove 32 is connected to the end of the strip groove 31. The first direction is the width direction or the length direction of the insulating layer 1. Preferably, the first direction is the width direction, that is, the strip grooves 31 are evenly spaced along the width direction of the insulating layer 1. One end of the strip groove 31 is flush with the end of the insulating layer 1. The arc groove 32 is used to connect two adjacent strip grooves 31. Exemplarily, the number of the strip grooves 31 is three, and the number of the arc grooves 32 is two.

[0038] Similar to the optical fiber groove 3 described above, the strip grooves 31 on both sides should also be as close to the edge of the insulating layer 1 as possible. The strip grooves 31 on both sides of the first direction are 0-30 mm away from the edge of the insulating layer 1 in the first direction. It should be noted that in this arrangement, the arc groove 32 is mainly used to connect two adjacent strip grooves 31, and the gratings in the optical fiber are not arranged in the arc groove 32, but are all arranged in the strip groove 31, corresponding to the upper, middle and lower positions on the battery core. Among them, the bending radius on the inner side of the arc groove 32 is greater than 8 mm.

[0039] The embodiment of the present application also provides a battery core assembly, which includes a battery core, an optical fiber and the above-mentioned optical fiber installation assembly, wherein the optical fiber is contained in the optical fiber installation assembly, and the optical fiber installation assembly is arranged on the battery core. Installing the optical fiber on the battery core through the optical fiber installation assembly can be used to measure the temperature at different positions on the battery core. Among them, the battery core and the optical fiber installation assembly can be located between the pole core and the shell of the battery core. It can also be located outside the shell.

[0040] like Figure 6 The figure shows a schematic diagram of the first installation method of the optical fiber installation assembly on the battery core. When installing the optical fiber 4, the insulating layer 1 and the bonding layer 2 are located between the pole core 5 and the shell (not shown in the figure) of the battery core, the bonding layer 2 is bonded to the pole core, and the optical fiber 4 in the optical fiber groove 3 is in contact with the pole core 5. Thus, the optical fiber 4 can collect the temperature of the battery core at the corresponding position. The end of the optical fiber 4 extends to the outside of the battery core and is used to connect to the optical fiber demodulator, so as to collect and read the temperature of the corresponding position inside the battery core.

[0041] For example, the gap between the pole core 5 of the battery cell and the outer shell is very small, and the second surface of the insulating layer 1 (i.e., the side where the optical fiber groove 3 is not provided) abuts against the outer shell of the battery cell. The thickness of the insulating layer 1 is 0.2-0.5 mm, and the thickness of the adhesive layer 2 is 0.1-2 mm. The insulating layer 1 and the adhesive layer 2 are set to a smaller thickness, so as to facilitate the installation of the optical fiber installation assembly into the interior of the battery cell.

[0042] Exemplarily, when the optical fiber installation assembly is located between the outer shell and the pole core 5, in addition to bonding the optical fiber installation assembly to the surface of the pole core 5, the optical fiber installation assembly can also be bonded to the inner wall of the outer shell through the adhesive layer 2, so that the optical fiber 4 in the optical fiber groove 3 can fit with the inner wall of the outer shell, thereby collecting the temperature of the battery core at the corresponding position.

[0043] like Figure 7 As shown, it is a schematic diagram of the second installation method of the optical fiber installation assembly. During installation, the insulating layer 1 and the adhesive layer 2 are located outside the battery core, the adhesive layer 2 is bonded to the outer shell 6 of the battery core, and the optical fiber 4 in the optical fiber groove 3 is in contact with the outer shell 6. Because the interval between the pole core and the outer shell 6 in the battery core is very small, and the outer shell 6 generally has good conductivity. The optical fiber 4 and the optical fiber installation assembly can be directly bonded to the outer shell 6 to detect the temperature of the corresponding position. Similarly, the end of the optical fiber 4 extends to the outside of the battery core and the optical fiber installation assembly, and is used to connect to the optical fiber demodulator to collect and read the temperature of the corresponding position inside the battery core.

[0044] For example, the shell 6 of the battery cell may be a metal shell or an aluminum-plastic film, and a suitable material is selected according to the type of the battery cell.

[0045] Figure 6 and Figure 7 As shown in the figure, a battery core extends to the outside of the battery core. When multiple optical fibers 4 are installed in the optical fiber installation assembly, the end of each optical fiber will extend to the outside of the battery core and the optical fiber installation assembly, thereby connecting (or connecting through a wiring harness) to the optical fiber demodulator.

[0046] For example, because a battery pack generally uses multiple cells together and the intervals between the cells are not too large, the thickness of the optical fiber installation assembly still needs to be limited, as described above: the thickness of the insulating layer 1 is 0.2-0.5 mm, and the thickness of the adhesive layer 2 is 0.1-2 mm. In some embodiments, the thicknesses of the insulating layer 1 and the adhesive layer 2 can be 0.3 mm and 0.1 mm, respectively.

[0047] The optical fiber installation assembly in the embodiment of the present application includes an insulating layer 1 and an adhesive layer 2. The optical fiber groove 3 on the insulating layer 1 can be used to accommodate and place the optical fiber. The optical fiber assembly is bonded to the battery core (or inside the battery core) through the adhesive layer. The position of the optical fiber is limited by the optical fiber groove and the battery core to achieve the installation of the optical fiber for measurement. The position of the optical fiber groove 3 in the present application is pre-set. Compared with manual installation using high-temperature tape, the optical fiber installation is more efficient and the position is more accurate. In addition, the grooving method of the optical fiber groove 3 of the optical fiber installation assembly in the embodiment of the present application, as well as the installation method of the optical fiber installation assembly can be selected according to actual needs. Different methods, the installation process is more flexible and has wider applicability.

[0048] An embodiment of the present application further provides a battery pack, which includes the above-mentioned battery cell assembly, that is, the optical fiber is installed on the battery cell through the optical fiber installation assembly, and the temperature of the battery cell is measured through the installed optical fiber.

[0049] The battery pack in the embodiment of the present application uses the above-mentioned optical fiber installation assembly to install the optical fiber for detecting the temperature of the battery core. In the optical fiber installation assembly, the optical fiber groove 3 on the insulating layer 1 can be used to accommodate and place the optical fiber, and the optical fiber assembly is bonded to the battery core (or inside the battery core) through the adhesive layer. The position of the optical fiber is limited by the optical fiber groove and the battery core to achieve the installation of the optical fiber for measurement. The position of the optical fiber groove 3 in the present application is pre-set. Compared with manual installation using high-temperature tape, the optical fiber installation is more efficient and the position is more accurate. Because the installation of optical fiber is more convenient, the assembly of battery cells or battery packs is also more efficient.

[0050] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0051] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0052] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various inventive aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be interpreted as reflecting the following intention: the claimed application requires more features than the features clearly stated in each claim. More specifically, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with features less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0053] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0054] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0055] The above is only a specific implementation or description of a specific implementation of the present application, and the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An optical fiber installation assembly, characterized in that: include: An insulating layer, wherein a first surface of the insulating layer is provided with an optical fiber groove for accommodating an optical fiber; An adhesive layer is disposed on the first surface of the insulating layer and exposes the optical fiber groove, and the adhesive layer is used for connecting the electric core.

2. The optical fiber installation assembly according to claim 1, characterized in that: A plurality of optical fiber grooves are provided on the first surface of the insulating layer, and the plurality of optical fiber grooves are arranged in an array along a first direction, and end openings of the optical fiber grooves are located at the ends of the insulating layer; wherein the first direction is the width direction or the length direction of the insulating layer.

3. The optical fiber installation assembly according to claim 2, characterized in that: The optical fiber grooves located at the edges on both sides of the first direction are at a distance of 0-30 mm from the edge of the insulating layer in the first direction.

4. The optical fiber installation assembly according to claim 1, characterized in that: The optical fiber groove includes a plurality of strip grooves and arc grooves, the strip grooves are arranged in an array along a first direction, the arc groove is arranged between two adjacent strip grooves, and the ends of the arc grooves are connected to the ends of the strip grooves; wherein the first direction is the width direction or the length direction of the insulating layer.

5. The optical fiber installation assembly according to claim 4, characterized in that: The strip grooves located on both sides of the first direction are at a distance of 0-30 mm from the edge of the insulating layer in the first direction, and the bending radius of the arc groove is greater than 8 mm.

6. The optical fiber installation assembly according to any one of claims 1 to 5, characterized in that: The thickness of the insulating layer is 0.2-0.5 mm, and the thickness of the adhesive layer is 0.1-2 mm.

7. The optical fiber installation assembly according to any one of claims 1 to 5, characterized in that: The optical fiber includes an optical fiber body and a plurality of gratings, wherein the plurality of gratings are connected to the optical fiber body and are arranged in the optical fiber groove at intervals.

8. A battery cell assembly, characterized in that: The battery core assembly includes a battery core, an optical fiber, and an optical fiber installation assembly according to any one of claims 1 to 7, wherein the optical fiber is accommodated in the optical fiber installation assembly, and the optical fiber installation assembly is disposed on the battery core.

9. The battery core assembly according to claim 8, characterized in that: The optical fiber installation assembly is located between the pole core and the shell of the battery core, the adhesive layer is bonded to the pole core, and the optical fiber in the optical fiber groove is bonded to the pole core; And / or, the adhesive layer is bonded to the inner wall of the outer shell, and the optical fiber is attached to the inner wall of the outer shell.

10. The battery core assembly according to claim 8, characterized in that: The optical fiber installation assembly is located outside the battery core, the adhesive layer is bonded to the outer shell of the battery core, and the optical fiber in the optical fiber groove is in contact with the outer side wall of the outer shell; wherein the outer shell is a metal shell or an aluminum-plastic film.

11. A battery pack, characterized in that: The battery pack comprises the battery cell assembly according to any one of claims 8 to 10.

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