Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack. The battery pack can comprise a box main body, a battery pack, a pouring sealant part, a cover plate and an isolation part, the box body is provided with a containing cavity and an opening part, and the containing cavity is defined by a bottom plate and a side frame; the battery pack is arranged in the accommodating cavity; the containing cavity is filled with the pouring sealant part; the cover plate covers the opening part, the isolation part is at least arranged between the pouring sealant part and the cover plate, and the isolation part is detachably connected with the cover plate and / or the pouring sealant part. The subsequent maintainability of the battery pack is better.

Description

Technical Field

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

[0002] The battery pack in the battery group needs to be adhesively fixed in the battery box through a potting glue part, and the potting glue part is likely to adhere to the cover plate of the battery box, making it difficult to open the battery box subsequently. However, electronic devices are prone to damage and need to open the battery box to replace the damaged electronic devices. Therefore, the current battery pack has poor maintainability in the future.

[0003] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0004] The purpose of the present disclosure is to overcome the deficiencies of the above related technologies and provide a battery pack.

[0005] According to one aspect of the present disclosure, there is provided a battery pack, including:

[0006] A box body main body having a receiving cavity and an opening part, the receiving cavity being surrounded by a bottom plate and side frames;

[0007] A battery group disposed in the receiving cavity;

[0008] A potting glue part filled in the receiving cavity;

[0009] A cover plate covering the opening part;

[0010] An isolation part, the isolation part being at least disposed between the potting glue part and the cover plate, and the isolation part being detachably connected to the cover plate and / or the potting glue part.

[0011] The battery box body of the present disclosure can isolate the potting glue part from the cover plate through the isolation part, avoiding the adhesion between the potting glue part and the cover plate, so that the cover plate can be opened to replace the damaged electronic devices, ensuring the subsequent maintainability of the battery pack.

[0012] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Brief Description of the Drawings

[0013] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic perspective exploded view of an exemplary embodiment of the battery box body of the present disclosure.

[0015] Figure 2 It is a schematic structural diagram of a cover plate in another exemplary embodiment of the battery box body of the present disclosure.

[0016] Figure 3 It is a schematic structural diagram of an exemplary embodiment of the battery pack of the present disclosure.

[0017] Description of reference numerals:

[0018] 1. Box body main body; 11. Bottom plate; 12. Side frame; 12a. First side frame; 12b. Second side frame; 13. Isolation component; 14. Accommodation cavity; 141. Electrical compartment; 142. Battery compartment; 15. Opening part;

[0019] 21. Cover plate; 211. First part; 212. Second part; 213. Fixing part; 22. Isolation part; 23. Adhesive layer;

[0020] 3. Battery pack; 4. Potting glue part; 5. Electronic device; 6. Sealing ring;

[0021] X. First direction; Y. Second direction. Detailed implementation manners

[0022] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0023] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the directions of the examples described in the accompanying drawings. It can be understood that if the device of the icon is turned upside down, the component described as "upper" will become the component described as "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" disposed on another structure, or that a structure is "indirectly" disposed on another structure through another structure.

[0024] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.; the terms "first", "second", "third", etc. are used only as labels and are not a limitation on the quantity of their objects.

[0025] In this application, unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium. "And / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0026] The exemplary embodiments of the present disclosure provide a battery pack. Referring to Figures 1 - 3 as shown, Figure 1 the first part 211 and the second part 212 in Figure 3 are not two physically distinct and separated parts, so they are divided into the first part 211 and the second part 212 by a dashed line;

[0027] For the battery pack of the present disclosure, the isolation part 22 can isolate the potting glue part 4 from the cover plate 21, preventing the potting glue part 4 from bonding to the cover plate 21, so that the cover plate 21 can be opened to replace the damaged electronic device 5, ensuring the subsequent maintainability of the battery pack.

[0028] In the present exemplary embodiment, referring to Figure 1 As shown, the battery box body can be configured as a cuboid structure. Specifically, the battery box body can include a box body main body 1 and a cover plate 21. The box body main body 1 can include a bottom plate 11 and four side frames 12. The four side frames 12 can include two first side frames 12a and two second side frames 12b. The bottom plate 11 and the cover plate 21 can be configured as rectangles. Two first side frames 12a and two second side frames 12b are arranged around the periphery of the bottom plate 11. The two first side frames 12a and the two second side frames 12b are connected end to end to form a rectangular frame. The first side frame 12a extends along the first direction X, and the second side frame 12b extends along the second direction Y. A cover plate 21 is arranged on the other side of the two first side frames 12a and the two second side frames 12b opposite to the bottom plate 11, such that the cover plate 21 is arranged opposite to the bottom plate 11. The two first side frames 12a and the two second side frames 12b are connected between the cover plate 21 and the bottom plate 11. The accommodation cavity 14 is surrounded by the bottom plate 11 and the side frames 12, that is, the bottom plate 11, the two first side frames 12a and the two second side frames 12b surround to form the accommodation cavity 14 of the box body main body 1. An opening 15 of the box body main body 1 is formed on the side of the accommodation cavity 14 opposite to the bottom plate 11, such that the box body main body 1 has the accommodation cavity 14 and the opening 15; the cover plate 21 covers the opening 15.

[0029] It should be noted that both the first direction X and the second direction Y are parallel to the bottom plate 11, and the first direction X intersects with the second direction Y. For example, the first direction X is perpendicular to the second direction Y.

[0030] Of course, in some other exemplary embodiments of the present disclosure, the bottom plate 11 and the cover plate 21 can be configured as circular, elliptical, trapezoidal, etc. The side frames 12 can be provided as one or more and surround to form circular, elliptical, trapezoidal, etc., such that the battery box body is formed into a cylindrical, elliptical cylindrical, prismatic, etc. shape. The battery box body can also be of other shapes, which will not be elaborated here one by one.

[0031] Referring to Figure 3As shown, the accommodation cavity 14 is at least used to accommodate the battery pack 3 and the potting glue part 4, that is, at least the battery pack 3 and the potting glue part 4 are arranged in the accommodation cavity 14. The battery pack 3 can include multiple columns of battery rows, and each battery row can include multiple single cells. The potting glue part 4 is filled between adjacent single cells and between the single cells and the battery box body, so as to fix the multiple single cells in the accommodation cavity 14, prevent the single cells from moving in the accommodation cavity 14, and ensure the strength and stability of the battery pack; moreover, the insulation performance between adjacent single cells can be ensured through the potting glue part 4.

[0032] After the battery pack 3 is installed in the accommodation cavity 14, potting glue is potted into the accommodation cavity 14, and then the cover plate 21 is covered. After the potting glue is cured, the potting glue part 4 is formed. The potting glue can be a foaming glue, which is composed of filling a polyurethane prepolymer, a foaming agent, a catalyst, a crosslinking agent, etc. into a high-pressure resistant iron can and filling gases such as propane. When the material is ejected from the aerosol can, the foamed polyurethane material will quickly expand and react with water in the air or in the contacted matrix to form a foam; the cured foaming glue foam has various effects such as caulking, bonding, sealing, heat insulation, and sound absorption; however, the potting glue part 4 will also bond with the cover plate 21, resulting in the subsequent difficulty in opening the battery box body and poor subsequent maintainability.

[0033] In the present exemplary embodiment, refer to Figures 1 - 3 As shown, the isolation part 22 is at least arranged between the potting glue part 4 and the cover plate 21, and the isolation part 22 is detachably connected to the cover plate 21 and / or the potting glue part 4. For example, the isolation part 22 can be detachably connected to the cover plate 21, or the isolation part 22 can be detachably connected to the potting glue part 4, or the isolation part 22 can be detachably connected to both the cover plate 21 and the potting glue part 4; through the isolation part 22, the potting glue part 4 can be isolated from the cover plate 21, avoiding the bonding between the potting glue part 4 and the cover plate 21, so that the cover plate 21 can be opened to replace the damaged electronic device 5, ensuring the subsequent maintainability of the battery pack.

[0034] The isolation part 22 can be a release film. Specifically, the isolation part 22 can be a release agent coated on the surface of the cover plate 21, and the release agent forms a release film after curing. For example, the release agent can be polyvinyl alcohol, silicone oil, silicone grease, liquid or emulsified paraffin, etc. In this case, the release film formed after the curing of the release agent is directly attached to the cover plate 21, and there is no need to bond the isolation part 22 through an adhesive layer. Moreover, the bonding force between the isolation part 22 and the cover plate 21 is an adhesion force.

[0035] The isolation part 22 can also be a pre-formed release film. In this case, the battery pack can further include an adhesive layer 23 that adhesively bonds at least part of the area between the isolation part 22 and the cover plate 21, that is, the isolation part 22 is adhesively bonded to the cover plate 21 through the adhesive layer 23. For example, the adhesive layer 23 can be adhesively bonded to all the mutually contacting surfaces between the isolation part 22 and the cover plate 21, or the adhesive layer 23 can be adhesively bonded to a part of the mutually contacting surfaces between the isolation part 22 and the cover plate 21. In this case, the bonding force between the isolation part 22 and the cover plate 21 is an adhesive force.

[0036] Of course, in some other exemplary embodiments of the present disclosure, the adhesive layer 23 may not be provided between the isolation part 22 and the cover plate 21, and only the isolation part 22 is attached to the surface of the cover plate 21, so that the adhesive force between the isolation part 22 and the cover plate 21 is relatively small, facilitating the subsequent separation of the isolation part 22 from the cover plate 21.

[0037] The material of the release film can be selected from plastic films such as PET (polyethylene terephthalate), PC (polycarbonate), PI (polyimide), and PE (polyethylene). In order to increase the release force of the plastic film, the plastic film is subjected to plasma treatment, fluorine coating treatment, or silicon release agent coating on the surface layer of the plastic film.

[0038] The release force of the release film can be changed by adjusting the "grammage" of the release film. The release force refers to the ease of separation. The "grammage" of the release film refers to the force required to peel off the release film under specific conditions (usually a sample with a width of 25 mm), and an approximate value obtained after unit conversion, which is vividly expressed in "grams" to represent the magnitude of this force. For example, the "grammage" of a lightly peeled release film is about 15 grams (i.e., 0.15 N / 25 mm), which means that under the test conditions, the force required to peel off the release film from the substrate is equivalent to a force of about 15 grams. The smaller the release force, the easier it is for the release film to separate from the bonding surface, which is considered to have better release performance. Conversely, a larger release force indicates more difficult separation, and such a release film belongs to the heavy peel type.

[0039] In this exemplary embodiment, the bonding force between the isolation part 22 and the cover plate 21 can be greater than the adhesive force between the isolation part 22 and the potting glue part 4, so that when the cover plate 21 is opened, the isolation part 22 can be separated from the potting glue part 4, and the isolation part 22 can be opened together with the cover plate 21, thereby separating the cover plate 21 and the isolation part 22 as a whole from the potting glue part 4, and the damaged electronic device 5 can be replaced to ensure the subsequent maintainability of the battery pack.

[0040] Of course, in some other exemplary embodiments of the present disclosure, the bonding force between the isolation part 22 and the cover plate 21 may be less than the adhesion force between the isolation part 22 and the potting glue part 4, so that when the cover plate 21 is opened, the isolation part 22 can be separated from the cover plate 21, the cover plate 21 can be opened, and the isolation part 22 is bonded to the potting glue part 4, thereby separating and opening the cover plate 21 from the potting glue part 4, and the damaged electronic device 5 can also be replaced to ensure the subsequent maintainability of the battery pack.

[0041] Specifically, the bonding force between the isolation part 22 and the cover plate 21 is the first bonding force, and the adhesion force between the isolation part 22 and the potting glue part 4 is the second adhesion force. At least one of the first bonding force and the second adhesion force is less than or equal to 1 N / 25 mm. For example, the first bonding force may be less than or equal to 1 N / 25 mm, while the second adhesion force is greater than 1 N / 25 mm; or the first bonding force may be greater than 1 N / 25 mm, while the second adhesion force is less than or equal to 1 N / 25 mm; or both the first bonding force and the second adhesion force may be less than or equal to 1 N / 25 mm.

[0042] When the first bonding force is less than or equal to 1 N / 25 mm and the second adhesion force is greater than 1 N / 25 mm, when the cover plate 21 is opened, the isolation part 22 is separated from the cover plate 21, thereby opening the cover plate 21.

[0043] When the first bonding force is greater than 1 N / 25 mm and the second adhesion force is less than or equal to 1 N / 25 mm, when the cover plate 21 is opened, the isolation part 22 is separated from the potting glue part 4, thereby opening the cover plate 21 together with the isolation part 22.

[0044] When both the first bonding force and the second adhesion force are less than or equal to 1 N / 25 mm, when the cover plate 21 is opened, the isolation part 22 may be separated from the cover plate 21 or may be separated from the potting glue part 4, and the cover plate 21 can also be opened.

[0045] In the exemplary embodiment, the orthographic projection of the potting glue part 4 on the cover plate 21 is located within the orthographic projection of the isolation part 22 on the cover plate 21. For example, the edge line of the orthographic projection of the potting glue part 4 on the cover plate 21 may coincide with the edge line of the orthographic projection of the isolation part 22 on the cover plate 21, or the orthographic projection of the isolation part 22 on the cover plate 21 may cover and be larger than the orthographic projection of the potting glue part 4 on the cover plate 21. With such a setting, the isolation part 22 is provided between the potting glue part 4 and the cover plate 21, that is, the isolation part 22 completely covers the potting glue part 4, avoiding the bonding between the potting glue part 4 and the cover plate 21, avoiding affecting the opening of the cover plate 21, ensuring that when the cover plate 21 is opened, the isolation part 22 can be separated from the potting glue part 4, or the isolation part 22 can be separated from the cover plate 21, thereby smoothly opening the cover plate 21, and the damaged electronic device 5 can be replaced to ensure the subsequent maintainability of the battery pack.

[0046] In the present exemplary embodiment, with reference to Figure 2 and Figure 3 as shown, one side of the cover plate 21 close to the box body 1 includes a fixing portion 213. The fixing portion 213 is fixedly connected to the box body 1, and an isolation portion 22 is not provided on the side of the fixing portion 213 close to the box body 1.

[0047] Specifically, a part of the side of the cover plate 21 close to the box body 1 is the fixing portion 213. The fixing portion 213 can be set as a rectangular ring adapted to the four side frames 12 of the box body 1. A sealing ring 6 can be provided between the fixing portion 213 and the box body 1. The sealing ring 6 can be set as a rectangular ring adapted to the four side frames 12 of the box body 1. The sealing between the fixing portion 213 and the box body 1 is achieved through the sealing ring 6. Moreover, threaded holes can be provided on the four side frames 12 of the box body 1, and through holes can be provided on the cover plate 21. The fixing bolts pass through the through holes and are threadedly engaged with the threaded holes to realize the connection between the fixing portion 213 and the box body 1, so as to realize the sealed connection between the fixing portion 213 and the box body 1 through the sealing ring 6 and the fixing bolts.

[0048] The isolation portion 22 is not provided on the side of the fixing portion 213 close to the box body 1, that is, the isolation portion 22 does not cover the fixing portion 213, or it can be said that the orthographic projection of the isolation portion 22 on the cover plate 21 does not overlap with the fixing portion 213, so as to avoid the isolation portion 22 affecting the sealed connection between the fixing portion 213 and the box body 1, thereby ensuring the sealing performance between the cover plate 21 and the box body 1, that is, ensuring the sealing performance of the battery box.

[0049] Of course, in some other exemplary embodiments of the present disclosure, the sealing ring 6 may not be provided between the fixing portion 213 and the box body 1, and the fixing portion 213 is only used for fixedly connecting with the box body 1.

[0050] In the present exemplary embodiment, with reference to Figure 1 and Figure 3 as shown, an isolation assembly 13 is provided in the battery box, that is, the isolation assembly 13 is disposed in the accommodation cavity 14. The isolation assembly 13 divides the accommodation cavity 14 into at least an electrical compartment 141 and a battery compartment 142. The battery compartment 142 is used for arranging the battery pack 3 and filling the potting glue portion 4, that is, single cells are arranged in the battery compartment 142, and a potting glue portion 4 is arranged in the battery compartment 142. The single cells can be fixed in the battery compartment 142 through the potting glue portion 4.

[0051] The electrical compartment 141 is used to accommodate electronic devices 5, that is, various electronic devices 5 are arranged in the electrical compartment 141. The electronic devices 5 may include a BMS (Battery Management System) and a BDU (Battery Disconnect Unit), etc.

[0052] The electronic devices 5 are prone to damage and need to be replaced when damaged. Therefore, a potting glue part 4 is not provided in the electrical compartment 141 to prevent the electronic devices 5 from being adhered, which would otherwise make it impossible to replace the electronic devices 5.

[0053] In this case, the cover plate 21 may include a first part 211 and a second part 212. The first part 211 is disposed opposite to the battery compartment 142, and at least an isolation part 22 is provided on the surface of the first part 211 close to the box body main body 1, that is, the isolation part 22 is at least provided on the surface of the first part 211 close to the box body main body 1; the second part 212 is at least disposed opposite to the electrical compartment 141, and at least a part of the surface of the second part 212 close to the box body main body 1 is not provided with the isolation part 22. Since the potting glue part 4 is not provided in the electrical compartment 141, the isolation part 22 may not be provided in the second part 212 disposed opposite to the electrical compartment 141, reducing the usage amount of the isolation part 22 and thus reducing the cost.

[0054] For example, it may be that only the isolation part 22 is provided on the surface of the first part 211 close to the box body main body 1, and the isolation part 22 is not provided on the surface of the second part 212 close to the box body main body 1; it may also be that not only the isolation part 22 is provided on the surface of the first part 211 close to the box body main body 1, but also the isolation part 22 is provided on a part of the surface of the second part 212 close to the box body main body 1, and the isolation part 22 is not provided on another part of the surface of the second part 212 close to the box body main body 1.

[0055] Since a part of the potting glue part 4 may overflow into the electrical compartment 141 through the gap between the isolation component 13 and the cover plate 21 during the foaming process of the potting glue part 4, there may be some potting glue part 4 in a part of the electrical compartment 141 close to the battery compartment 142.

[0056] Optionally, referring to Figure 3As shown, the isolation part 22 extends towards the side of the electrical compartment 141 and protrudes from the isolation component 13. That is, the isolation part 22 is not only arranged on the side of the first part 211 close to the box body 1, but also on the side of a part of the cover plate 21 opposite to the isolation component 13 close to the box body 1, and also on the side of a part of the second part 212 close to the box body 1. By setting it in this way, it can be avoided that the potting glue part 4 overflowing into the electrical compartment 141 adheres to the cover plate 21, resulting in the cover plate 21 being unable to be opened, which affects the subsequent maintainability of the battery pack. That is, the isolation part 22 protruding between the isolation component 13 and the cover plate 21 can isolate the potting glue part 4 overflowing above the isolation component 13 from the cover plate 21, and the isolation part 22 protruding into the electrical compartment 141 can isolate the potting glue part 4 overflowing into the electrical compartment 141 from the cover plate 21, ensuring that the cover plate 21 can be opened smoothly to replace the electronic device 5 and ensuring the subsequent maintainability of the battery pack.

[0057] In this case, the distance K1 between the edge of the isolation part 22 protruding from the isolation component 13 and the isolation component 13 is greater than or equal to 20 mm and less than or equal to 100 mm. For example, the distance K1 between the edge of the isolation part 22 protruding from the isolation component 13 and the isolation component 13 can be 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, 95 mm, etc.

[0058] If the distance between the edge of the isolation part 22 protruding from the isolation component 13 and the isolation component 13 is too small, the isolation part 22 is not sufficient to isolate the potting glue part 4 overflowing into the electrical compartment 141 from the cover plate 21, resulting in the cover plate 21 adhering to the potting glue part 4 overflowing into the electrical compartment 141 and affecting the subsequent maintainability of the battery pack.

[0059] If the distance between the edge of the isolation part 22 protruding from the isolation component 13 and the isolation component 13 is too large, the use area of the isolation part 22 is too large, which is not conducive to cost reduction.

[0060] The above numerical range not only makes the isolation part 22 sufficient to isolate the potting glue part 4 overflowing into the electrical compartment 141 from the cover plate 21, avoiding the cover plate 21 adhering to the potting glue part 4 overflowing into the electrical compartment 141 and being unable to be opened to ensure the subsequent maintainability of the battery pack, but also makes the use area of the isolation part 22 not large and the cost low.

[0061] The "parallel" and "perpendicular" mentioned in this application can not only be completely parallel and perpendicular, but also have a certain error. For example, if the included angle between the two is greater than or equal to 0° and less than or equal to 5°, it is considered that the two are parallel to each other; if the included angle between the two is greater than or equal to 85° and less than or equal to 95°, it is considered that the two are perpendicular to each other.

[0062] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A battery pack, characterized in that: include: The box body has a receiving cavity and an opening, wherein the receiving cavity is surrounded by a bottom plate and side frames; A battery pack is arranged in the accommodating cavity; A potting glue portion, filled in the accommodating cavity; A cover plate, covering the opening; An isolation part, wherein the isolation part is at least arranged between the potting glue part and the cover plate, and the isolation part is detachably connected to the cover plate and / or the potting glue part.

2. The battery pack according to claim 1, characterized in that: The bonding force between the isolation part and the cover plate is smaller than the bonding force between the isolation part and the potting glue part, or the bonding force between the isolation part and the cover plate is larger than the bonding force between the isolation part and the potting glue part.

3. The battery pack according to claim 2, characterized in that: The bonding force between the isolation part and the cover plate is a first bonding force, the bonding force between the isolation part and the potting glue part is a second bonding force, and at least one of the first bonding force and the second bonding force is less than or equal to 1N / 25mm.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The orthographic projection of the potting glue portion on the cover plate is located within the orthographic projection of the isolation portion on the cover plate.

5. The battery pack according to any one of claims 1 to 3, characterized in that: The cover plate comprises a fixing portion on one side close to the box body, the fixing portion is sealedly connected to the box body, and the isolating portion is not arranged on one side close to the box body.

6. The battery pack according to any one of claims 1 to 3, characterized in that: The battery pack further comprises: An isolation component is arranged in the accommodating cavity, dividing the accommodating cavity into at least an electrical compartment and a battery compartment, the battery compartment is used to set the battery pack and fill the potting glue part, and the electrical compartment is used to set electronic devices. The cover plate includes a first part and a second part, the first part is arranged opposite to the battery compartment, and the second part is at least arranged opposite to the electrical compartment, the isolation part is at least arranged on a side of the first part close to the box body, and at least a part of a side of the second part close to the box body is not provided with the isolation part.

7. The battery pack according to claim 6, characterized in that: The isolation portion extends toward one side of the electrical compartment and protrudes from the isolation component. The distance between the edge of the isolation portion protruding from the isolation component and the isolation component is greater than or equal to 20 mm and less than or equal to 100 mm.

8. The battery pack according to any one of claims 1 to 3, characterized in that: The isolation portion is a release film.

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises: The adhesive layer is bonded to at least a portion between the release film and the cover plate.

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