Insulating protective equipment

Abstract

This application provides an insulating protective fixture, belonging to the field of battery technology. The insulating protective fixture is used to protect battery cell packs, which include multiple battery cells stacked in the same direction. Adjacent battery cells are connected by connecting tabs located on top of the battery cells, with a first gap between the connecting tabs and the top surface of the battery cells. The insulating protective fixture includes: a main body and at least one engaging portion. The main body covers the top of at least one battery cell in the battery cell pack and is located on the side of the connecting tabs facing away from the battery cells. The engaging portion is connected to the main body and is bent relative to the main body to form a receiving cavity together with the main body. The receiving cavity has an opening facing the battery cells, and the engaging portion engages within the first gap so that at least a portion of the connecting tabs is located within the receiving cavity. The insulating protection provided by this application embodiment can improve the maintenance efficiency of battery cell packs.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to an insulating protective tooling. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable social development. Rechargeable batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage systems, and are an important component in promoting energy transition and sustainable development. For the new energy industry, battery technology is a crucial factor in its development.

[0003] During battery repair, to reduce the risk of high-voltage short circuits caused by dropped tools / tools or accidental contact, and thus minimize the probability of injury to repair personnel and battery damage, insulating protective fixtures are used to protect the individual battery cells that do not require repair. However, current insulating protective fixtures suffer from low repair efficiency and are prone to secondary contamination. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one objective of this application is to provide an insulating protective fixture to improve the maintenance efficiency of battery cell packs.

[0005] An embodiment of the first aspect of this application provides an insulating protective fixture for protecting a battery cell assembly. The battery cell assembly includes multiple battery cells stacked in the same direction, adjacent battery cells being connected by a connecting piece located on top of the battery cells. A first gap exists between the connecting piece and the top surface of the battery cells. The insulating protective fixture includes: a main body and at least one engaging portion. The main body is used to cover the top of at least one battery cell in the battery cell assembly, and the main body is located on the side of the connecting piece facing away from the battery cells. The engaging portion is connected to the main body and is bent relative to the main body to form a receiving cavity together with the main body. The receiving cavity has an opening facing the battery cells, and the engaging portion is used to engage within the first gap so that at least a portion of the connecting piece is located within the receiving cavity.

[0006] In the technical solution of this application embodiment, the main body covers the top of the battery cell and is located on the side of the connecting piece away from the battery cell. That is, the main body can be used to provide insulation protection for the top of the battery cell and the connecting piece located on the top of the battery cell. The engaging part is bent to engage within the first gap, so that the insulation protection fixture as a whole is not easily displaced, providing stable and reliable protection for the battery cell assembly. At the same time, the connecting piece can enter and exit through the opening of the receiving cavity. This structure enables a quick and detachable connection between the insulation protection fixture and the battery cell, which not only improves the reusability and maintenance efficiency of the insulation protection fixture, but also reduces the risk of secondary contamination of the battery cell caused by the difficulty in assembling and disassembling the insulation protection fixture and the battery cell.

[0007] In some embodiments, the angle between the engaging portion and the main body is less than or equal to 90°. This allows the engaging portion to have a better clamping effect, making the insulating protective fixture less prone to loosening and falling off during use.

[0008] In some embodiments, the engaging portion includes: a first portion and a second portion, the first portion being connected to the main body portion and bent relative to the main body portion; the second portion being connected to the side of the first portion away from the main body portion and bent relative to the first portion, and the second portion being disposed opposite to the main body portion. This causes the engaging portion to form an inner hook structure, thereby enabling the engaging portion to engage more stably within the first gap, making the insulating protective tooling less prone to loosening and falling off during use.

[0009] In some embodiments, the included angle between the first part and the main body is less than or equal to 90°. This allows the inner hook structure formed by the first and second parts to have a better clamping effect, making the insulating protective fixture less prone to loosening and falling off during use.

[0010] In some embodiments, the plane containing the second part can be parallel to the plane containing the main part. This makes it easier for the second part to fit into the first gap.

[0011] In some embodiments, the engaging portion further includes a third portion, which connects to the side of the second portion away from the first portion. The third portion is bent relative to the second portion and is disposed opposite to the first portion. Thus, after the third portion extends into the first gap, it can abut against the connecting piece, thereby improving the stability of the engaging portion and the first gap, making the insulating protective fixture less prone to loosening and falling off during use.

[0012] In some embodiments, the plane containing the second part may also form an angle with the plane containing the main part, and the second part may be bent toward the side containing the main part. Thus, after the second part is engaged with the first gap, it can abut against the connecting piece, improving the stability of the engagement between the engaging part and the first gap, making the insulating protective fixture less prone to loosening or falling off during use.

[0013] In some embodiments, the second part is made of an elastic material. Thus, when the second part is engaged in the first gap, its elastic deformation pulls it away from the main body, increasing the distance between the second part and the main body. After the second part is engaged in the first gap, it springs back to abut against the connecting piece, allowing the entire insulating protective fixture to be more stably engaged in the first gap.

[0014] In some embodiments, the first part is made of an elastic material. The first part is capable of elastic deformation, and during the process of the second part engaging with the first gap, the first part can better cooperate with the second part so that the second part can smoothly engage with the first gap.

[0015] In some embodiments, the main body and the engaging part are integrally formed. This results in high structural strength, high production efficiency, and good dimensional consistency for the insulating protective tooling.

[0016] In some embodiments, there are two engaging portions, which are arranged opposite to each other along the width direction of the main body. The two engaging portions can improve the stability of the insulating protective fixture on top of the battery cell, and the two engaging portions form a redundant structure, so that when the engaging portion on one side fails, the other side can still provide the engaging function.

[0017] In some embodiments, two engaging portions are respectively connected to both sides of the main body along the width direction. By providing engaging portions on both opposite sides of the main body along the width direction, the insulating protective tooling and the connecting piece can achieve symmetrical engagement and positioning on both sides, resulting in uniform assembly force and effectively improving assembly stability and positioning accuracy.

[0018] In some embodiments, the thickness of the main body is 0.3mm to 0.7mm. Within this range, on the one hand, the thickness of the main body is not too small, which to some extent avoids the problems of easy deformation, warping, and cracking of the main body, improves its protective capability, and makes the main body have good insulation and withstand voltage performance, reducing the risk of being broken down; on the other hand, within this range, the thickness of the main body is not too large, which can reduce the risk of the main body damaging the top of the battery cell, and can reduce the cost of insulation protection tooling.

[0019] In some embodiments, the thickness of the engaging portion is 0.3mm to 0.7mm. Within this range, on the one hand, the thickness of the engaging portion is not too small, which to some extent avoids the problems of easy deformation, warping, and cracking of the main body, allowing it to be engaged relatively stably in the first gap; on the other hand, within this range, the thickness of the engaging portion is not too large, so that the engaging portion can be easily engaged into first gaps of different thicknesses, thereby accommodating battery cells of various sizes and reducing the cost of insulation protection tooling.

[0020] In some embodiments, the surface energy of the main body is ≥30mN / m. This reliably reduces the risk of electrostatic adsorption and dust accumulation on the surface of the main body due to excessively low surface energy, reduces the adverse effects on insulation performance, and thus improves the insulation protection performance of the battery cell pack.

[0021] In some embodiments, the surface energy of the engagement portion is ≥30mN / m. This reliably reduces the risk of electrostatic adsorption and dust accumulation on the engagement portion surface due to excessively low surface energy, thus minimizing adverse effects on insulation performance.

[0022] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0023] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0024] Figure 1 This is an exploded structural diagram of a battery according to some embodiments of this application;

[0025] Figure 2 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0026] Figure 3 This is a front view of battery cell packs connected by connecting pieces in some embodiments of this application;

[0027] Figure 4 This is a side view of battery cell packs connected by connecting tabs in some embodiments of this application;

[0028] Figure 5 This is a front view of the insulating protective tooling and battery cell assembly in some embodiments of this application;

[0029] Figure 6 This is a side view of the insulating protective tooling in conjunction with a battery cell pack according to some embodiments of this application;

[0030] Figure 7 This is a perspective view of the insulating protective tooling of some embodiments of this application;

[0031] Figure 8 This is a bottom view of the insulating protective tooling according to some embodiments of this application;

[0032] Figure 9 This is one of the side views of the insulating protective tooling according to some embodiments of this application;

[0033] Figure 10 This is a second side view of an insulating protective fixture according to some embodiments of this application;

[0034] Figure 11 This is a third side view of an insulating protective fixture according to some embodiments of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] Part 1 (2021), Part 2 (2022), Part 3 (2023);

[0037] Battery 100, insulating protective tooling 200, main body 201, engaging part 202;

[0038] The enclosure includes a cavity 1, a housing 10, an upper housing 11, a lower housing 12, a battery cell 20, an end cap 21, an electrode terminal 21a, a housing 22, an electrode assembly 23, an electrode tab 23a, a connecting piece 30, a conductive body 31, a connecting part 32, and a first gap 33. Detailed Implementation

[0039] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0044] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0045] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0047] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0048] During battery repair, to reduce the risk of high-voltage short circuits caused by dropped tools / tools or accidental contact, and to minimize the probability of injury to repair personnel and battery damage, insulating covers are used to protect individual battery cells that do not require repair. However, current insulating covers are fixed structures built into the battery product and are designed as permanent insulating components, making them impossible to disassemble and reassemble. If repair is needed on a specific group of battery cells, the entire insulating cover must be removed, resulting in low repair efficiency and potentially causing secondary contamination of the battery during the removal process.

[0049] Based on the above considerations, an insulating protective fixture is designed to protect a battery cell assembly. The battery cell assembly includes multiple battery cells stacked in the same direction. Adjacent battery cells are connected by a connecting piece located on top of the battery cells. There is a first gap between the connecting piece and the top surface of the battery cell. The insulating protective fixture includes: a main body and at least one engaging part. The main body is used to cover the top of at least one battery cell in the battery cell assembly, and the main body is located on the side of the connecting piece away from the battery cell. The engaging part is connected to the main body and is bent relative to the main body to form a receiving cavity together with the main body. The receiving cavity has an opening facing the battery cell. The engaging part is used to engage within the first gap so that at least a portion of the connecting piece is located within the receiving cavity.

[0050] The main body covers the top of the battery cell and is located on the side of the connecting piece opposite to the battery cell. That is, the main body can be used to provide insulation protection for the top of the battery cell and the connecting piece located on top of the battery cell. The engaging portion is bent to engage within the first gap, so that the insulation protection fixture as a whole is not easily displaced, providing stable and reliable protection for the battery cell assembly. At the same time, this structure allows for quick and detachable connection between the insulation protection fixture and the battery cell, which not only improves the reusability and maintenance efficiency of the insulation protection fixture but also reduces the risk of secondary contamination of the battery cell caused by difficulties in assembling and disassembling the insulation protection fixture.

[0051] The battery cells disclosed in this application can be used, but are not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. A power system comprising the battery cells and batteries disclosed in this application can be used to construct such an electrical device or energy storage device.

[0052] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0053] In some embodiments of this application, the battery can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0054] This application also provides an energy storage device that uses a battery as a power source. The energy storage device can be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0055] Please refer to Figure 1 , Figure 1 This is an exploded structural diagram of a battery provided in some embodiments of this application. The battery 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20 and can employ various structures. In some embodiments, the housing 10 may include an upper housing 11 and a lower housing 12, which overlap each other, collectively defining a space for accommodating the battery cell 20. The lower housing 12 may be a hollow structure with an opening at one end, and the upper housing 11 may be a plate-like structure, covering the opening side of the lower housing 12 so that the upper housing 11 and lower housing 12 collectively define the space. Alternatively, both the upper housing 11 and lower housing 12 may be hollow structures with openings on one side, with the opening side of the upper housing 11 overlapping the opening side of the lower housing 12. Of course, the box 10 formed by the upper box 11 and the lower box 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0056] In battery 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, battery 100 can also be composed of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 10. Battery 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0057] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0058] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery cell provided in some embodiments of this application. The battery cell 20 refers to the smallest unit that makes up the battery. For example... Figure 3 The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0059] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. Functional components such as electrode terminals 21a may be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold.

[0060] The housing 22 is an assembly used to fit the end cap 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte and other components.

[0061] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode plates without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals to form a current loop.

[0062] This application provides an insulating protective fixture for protecting battery cell packs, such as... Figures 3 to 6 As shown, the battery cell assembly includes multiple battery cells 20 stacked in the same direction. Adjacent battery cells 20 are connected by a connecting piece 30 located on top of the battery cell 20. A first gap 33 exists between the connecting piece 30 and the top surface of the battery cell 20. The insulating protective fixture 200 includes a main body 201 and at least one engaging part 202. The main body 201 is used to cover the top of at least one battery cell 20 in the battery cell assembly, and the main body 201 is located on the side of the connecting piece 30 away from the battery cell 20. The engaging part 202 is connected to the main body 201 and is bent relative to the main body 201 to form a receiving cavity 1 together with the main body 201. The receiving cavity 1 has an opening facing the battery cell 20. The engaging part 202 is used to engage within the first gap 33 so that at least a portion of the connecting piece 30 is located within the receiving cavity 1.

[0063] In some embodiments, each battery cell 20 is provided with electrode terminals, which are electrically connected to an electrode assembly. There can be two electrode terminals, connected to a positive electrode tab and a negative electrode tab respectively. A connecting piece 30 can connect to the electrode terminals of adjacent battery cells 20. Exemplarily, the electrode terminals can be posts, and each battery cell 20 can include a positive post connected to the positive electrode tab and a negative post connected to the negative electrode tab. The connecting piece 30 can connect the positive post of one battery cell 20 and the negative post of another adjacent battery cell 20. Each post of the battery cell 20 is connected to a connecting piece 30; that is, one battery cell 20 is connected to two connecting pieces 30. The positive post of the current battery cell 20 is connected to the negative post of the previous battery cell 20 via the connecting piece 30, and the negative post of the current battery cell 20 is connected to the positive post of the next battery cell 20 via the connecting piece 30.

[0064] In some embodiments, such as Figure 3 as well as Figure 4As shown, the connecting piece 30 may include a conductive main body portion 31 and two connecting portions 32. The connecting portions 32 are connected to the surface of the conductive main body portion 31 and protrude from the surface of the conductive main body portion 31. The conductive main body portion 31 includes a first region and a second region, which are respectively located on the top of two adjacent battery cells 20. The two connecting portions 32 are respectively connected to the first region and the second region. The connecting portion 32 in the first region is used to connect the terminal of one of the two adjacent battery cells 20, and the connecting portion 32 in the second region is used to connect the terminal of the other battery cell 20. Because the connecting portion 32 protrudes from the surface of the conductive main body portion 31, a first gap 33 is formed between the connecting portion 32 and the top surface of the battery cell 20 and the conductive main body portion 31.

[0065] In some embodiments, the connecting piece 30 can be welded to the pole post.

[0066] In some embodiments, the connecting piece 30 may be a bar plate.

[0067] The main body 201 is located on the side of the connecting piece 30 away from the battery cell 20. That is, the main body 201 covers the top of the battery cell 20 and also covers the connecting piece 30 on the top of the battery cell 20.

[0068] The main body 201 can cover the entire top of the battery cell 20, or it can cover part of the top of the battery cell 20.

[0069] In some embodiments, the main body 201 covers at least two terminals of the battery cell 20 and the area between the two terminals.

[0070] In some embodiments, the main body 201 may cover the top of multiple battery cells 20 in a battery cell group, and the number of battery cells 20 covered may be adjusted according to the maintenance requirements. For example, as Figure 5 As shown, if two battery cells 20 in a battery pack require maintenance, the main body 201 can cover the top of the remaining battery cells 20. If there are unmaintained battery cells 20 on both sides of the two battery cells 20 requiring maintenance, two or more insulating protective fixtures 200 are needed to protect the remaining unmaintained battery cells 20. The size of the main body 201 can be designed according to the number and size of the battery cells 20 that need protection, so that the main body 201 can be positioned precisely on top of a set number of battery cells 20.

[0071] In some embodiments, if the number of battery cells 20 that need protection is too large, multiple insulating protective fixtures 200 can be spliced ​​together. For example, if the number of battery cells 20 that need protection is 10, and the 10 battery cells 20 are arranged continuously, then the first 5 battery cells 20 and the last 5 battery cells 20 can each be protected by two insulating protective fixtures 200.

[0072] In some embodiments, the main body 201 may be plate-shaped, that is, the two surfaces of the main body 201 that are opposite each other along the thickness direction are relatively flat.

[0073] In some embodiments, the main body 201 may also be an arc-shaped plate, that is, the two opposing surfaces of the main body 201 along the thickness direction are arc-shaped surfaces.

[0074] In some embodiments, the main body 201 may be a cover-like structure.

[0075] It is understandable that the shape of the main body 201 is not limited to the above-mentioned types, as long as the main body 201 can cover the top of the battery cell 20.

[0076] The number of locking parts 202 can be one or two.

[0077] In some embodiments, the engaging portion 202 may include a first straight segment and a second straight segment. The first straight segment connects to the main body portion 201, and the second straight segment connects to the side of the first straight segment opposite to the first straight segment. The first straight segment is bent relative to the main body portion 201, and the second straight segment is bent relative to the first straight segment, and the second straight segment is disposed opposite to the main body portion 201. The surfaces of the first and second straight segments are planar.

[0078] In some embodiments, the engaging portion 202 may also include an arc-shaped segment and a straight segment. The arc-shaped segment connects to the main body portion 201, and the straight segment connects to the side of the arc-shaped segment opposite to the main body portion 201. The straight segment is disposed opposite to the main body portion 201. The surface of the arc-shaped segment is an arc-shaped surface, and the surface of the straight segment is a plane.

[0079] In some embodiments, the engaging portion 202 may also include a first arc-shaped segment and a second arc-shaped segment. The first arc-shaped segment is connected to the main body portion 201, and the second arc-shaped segment is connected to the side of the first arc-shaped segment opposite to the main body portion 201. The second arc-shaped segment is disposed opposite to the main body portion 201. The surfaces of the first arc-shaped segment and the second arc-shaped segment are arc-shaped surfaces.

[0080] In some embodiments, the heat distortion temperature of the insulating protective fixture 200 is greater than or equal to 120°C. During insulation testing, with a 1000V voltage continuously applied for 60 seconds, the resistance of the insulating protective fixture 200 is greater than or equal to 500MΩ. During withstand voltage testing, with a 2700V voltage continuously applied for 60 seconds, the leakage current flowing through the insulating protective fixture 200 is less than or equal to 1mA.

[0081] In the above technical solution, the main body 201 covers the top of the battery cell 20 and is located on the side of the connecting piece 30 away from the battery cell 20. That is, the main body 201 can be used to provide insulation protection for the top of the battery cell 20 and the connecting piece 30 located on the top of the battery cell 20. The engaging part 202 is bent to engage within the first gap 33, so that the insulation protection fixture 200 as a whole is not easily displaced, providing stable and reliable protection for the battery cell assembly. At the same time, this structure enables quick and detachable connection between the insulation protection fixture 200 and the battery cell 20, which not only improves the reusability and maintenance efficiency of the insulation protection fixture 200, but also reduces the risk of secondary contamination of the battery cell 20 caused by the difficulty in disassembling and assembling the insulation protection fixture 200 and the battery cell 20.

[0082] According to some embodiments of this application, the included angle between the engaging portion 202 and the main body portion 201 is less than or equal to 90°.

[0083] The included angle between the engaging part 202 and the main body 201 can be the bending angle of the engaging part 202 relative to the main body 201.

[0084] In some embodiments, the engaging portion 202 includes a straight line segment, and when the straight line segment connects to the main body portion 201, the bending angle of the engaging portion 202 relative to the main body portion 201 is the angle between the plane containing the straight line segment and the plane containing the main body portion 201.

[0085] In some embodiments, the engaging portion 202 includes an arc-shaped segment, and when the arc-shaped segment is connected to the main body portion 201, the bending angle of the engaging portion 202 relative to the main body portion 201 can be the angle between the tangent at the connection point of the arc-shaped segment and the plane on which the main body portion 201 is located.

[0086] In some embodiments, the included angle between the engaging portion 202 and the main body portion 201 can be 30°, 45°, 60°, 75° or 90°.

[0087] In some embodiments, there are two engaging portions 202, and the two engaging portions 202 are connected to opposite sides of the main body portion 201. The included angle between the two engaging portions 202 and the main body portion 201 can be the same.

[0088] The included angle between the engaging part 202 and the main body 201 is less than or equal to 90°, which enables the engaging part 202 to have a good clamping effect, making the insulating protective fixture 200 less likely to loosen or fall off during use.

[0089] refer to Figures 7 to 9 According to some embodiments of this application, the engaging portion 202 includes: a first portion 2021 and a second portion 2022. The first portion 2021 is connected to the main body portion 201 and is bent relative to the main body portion 201. The second portion 2022 is connected to the side of the first portion 2021 away from the main body portion 201 and is bent relative to the first portion 2021. The second portion 2022 is disposed opposite to the main body portion 201.

[0090] In some embodiments, the first part 2021 can be a straight line segment, and the second part 2022 can also be a straight line segment. For example, the main body 201 is a flat plate, and the second part 2022 can be arranged parallel to the main body 201; or, the second part 2022 and the main body 201 can also have an angle, and the second part 2022 bends relative to the first part 2021 toward the side closer to the main body 201.

[0091] In some embodiments, the first part 2021 may also be an arc segment, and the second part 2022 may be a straight segment. For example, the main body 201 is a flat plate, and the second part 2022 may be arranged parallel to the main body 201; or, the second part 2022 may also have an angle with the main body 201, and the second part 2022 may be bent relative to the first part 2021 toward the side closer to the main body 201.

[0092] In some embodiments, the relative distance between the end of the first part 2021 that is away from the main body part 201 and the main body part 201 is greater than the height of the connecting piece 30.

[0093] like Figure 6 As shown, since the second part 2022 is bent relative to the first part 2021 and the second part 2022 is disposed opposite to the main body part 201, a receiving cavity is formed between the second part 2022, the first part 2021 and the main body part 201 opposite to the second part 2022, and the second part 2022 extends into the first gap 33 for engagement.

[0094] In some embodiments, there are two engaging portions 202, and the two engaging portions 202 are spaced apart along the width direction X of the main body 201. Along the relative direction of the two engaging portions 202, the minimum relative distance between the second portions 2022 of the two engaging portions 202 is less than the minimum distance between the first portions of the two engaging portions 202, so that it can be adapted to battery cells 20 of different sizes.

[0095] In some embodiments, the first part 2021 and the second part 2022 both extend along the length direction Y of the main body 201, so that the first part 2021 and the second part 2022 can simultaneously engage in the first gap 33 on the top of the stacked battery cells 20, thereby protecting the multiple battery cells 20.

[0096] In the above technical solution, the first part 2021 and the second part 2022 make the engaging part 202 form an inner hook structure, thereby making the engaging part 202 more stably engaged in the first gap 33, so that the insulating protective fixture 200 is not easy to loosen or fall off during use.

[0097] like Figure 9 As shown, according to some embodiments of this application, the included angle between the first part 2021 and the main body part 201 is less than or equal to 90°.

[0098] For example, the first part 2021 can be a straight line segment, the main body 201 can be a flat plate, and the angle between the plane where the first part 2021 is located and the plane where the main body 201 is located can be 30°, 45°, 60°, 75° or 90°.

[0099] The angle between the first part 2021 and the main body 201 is less than or equal to 90°, so that the inner hook structure formed by the first part 2021 and the second part 2022 can have a good clamping effect, making the insulating protective fixture 200 less likely to loosen or fall off during use.

[0100] like Figure 9 As shown, according to some embodiments of this application, the plane where the second part 2022 is located can be parallel to the plane where the main part 201 is located.

[0101] The second part, 2022, is a straight line segment, while the main body, 201, is plate-shaped.

[0102] In some embodiments, the angle between the plane where the first part 2021 is located and the plane where the main body 201 is located is an acute angle, and the angle between the plane where the second part 2022 is located and the plane where the first part 2021 is located is an obtuse angle.

[0103] In the above technical solution, the second part 2022 is parallel to the main part 201, making it easier for the second part 2022 to be inserted into the first gap 33.

[0104] like Figure 10 As shown, according to some embodiments of this application, the engaging part 202 further includes a third part 2023, which is connected to the side of the second part 2022 away from the first part 2021. The third part 2023 is bent relative to the second part 2022 and is disposed opposite to the first part 2021.

[0105] The third part 2023 is positioned opposite to the first part 2021. In this way, the third part 2023 is positioned closer to the main body 201 than the second part 2022, so that the third part 2023 forms an upward-curving structure compared to the second part 2022. The relative distance between the third part 2023 and the main body 201 is smaller than the relative distance between the second part 2022 and the main body 201.

[0106] When the second part 2022 is parallel to the main body 201 and its thickness is less than the height of the first gap 33, the second part 2022 will not abut against the connecting piece 30 above the first gap 33 after it extends into the first gap 33. Since the third part 2023 is curved upwards compared to the second part 2022, when engaged, the second part 2022 and the third part 2023 extend into the first gap 33 together, and the third part 2023 can abut against the connecting piece 30 above the first gap 33.

[0107] In some embodiments, the third part 2023 may be perpendicular to the main part 201.

[0108] In other embodiments, the third part 2023 may also have an angle with the main part 201.

[0109] In the above technical solution, the third part 2023 can abut against the connecting piece 30 after extending into the first gap 33, thereby improving the stability of the engagement between the engaging part 202 and the first gap 33, making the insulating protective fixture 200 less prone to loosening and falling off during use.

[0110] like Figure 11 As shown, according to some embodiments of this application, the plane where the second part 2022 is located may also have an angle with the plane where the main part 201 is located, and the second part 2022 bends toward the side where the main part 201 is located.

[0111] In other words, the distance between the end of the second part 2022 connected to the first part 2021 and the main body 201 is greater than the distance between the end of the second part 2022 away from the main body 201 and the main body 201. Thus, after the second part 2022 extends into the first gap 33, the end of the second part 2022 away from the first part 2021 can abut against the connecting piece 30 above the first gap 33.

[0112] In the above technical solution, after the second part 2022 is engaged in the first gap 33, it can abut against the connecting piece 30, improve the stability of the engagement between the engaging part 202 and the first gap 33, and make the insulating protective fixture 200 less likely to loosen or fall off during use.

[0113] According to some embodiments of this application, the second part 2022 is an elastic material.

[0114] In some embodiments, the elastic material of Part 2022 may include, but is not limited to, one of polycarbonate, silicone rubber, EPDM rubber, nitrile rubber, fluororubber, thermoplastic elastomer, thermoplastic polyurethane, polypropylene elastomer, polyvinyl chloride, polypropylene, nylon, or polyurethane foam.

[0115] If the second part 2022 is made of an elastic material, the first part 2021 can also be made of an elastic material, or the first part 2021 can also be made of a rigid material.

[0116] During engagement, the main body 201 needs to be positioned above the connecting piece 30, while the second part 2022 needs to extend into the first gap 33 below the connecting piece 30. However, if the second part 2022 is bent toward the side where the main body 201 is located, the gap between the end of the second part 2022 away from the first part 2021 and the main body 201 may be smaller than the thickness of the connecting piece 30, making engagement difficult.

[0117] Based on this, the material of the second part 2022 is set to be an elastic material. Thus, when the second part 2022 is inserted into the first gap 33, its elastic deformation can pull the second part 2022 away from the main body 201, increasing the distance between the second part 2022 and the main body 201. After the second part 2022 is inserted into the first gap 33, the second part 2022 springs back to abut against the connecting piece 30, allowing the insulating protective fixture 200 as a whole to be more stably engaged in the first gap 33.

[0118] According to some embodiments of this application, the first part 2021 is an elastic material.

[0119] In some embodiments, the elastic material of the first part 2021 may be the same as the elastic material of the second part 2022.

[0120] In some other embodiments, the elastic material of the first part 2021 may also be the same as the elastic material of the second part 2022.

[0121] In some embodiments, the elastic material of the first part 2021 may include, but is not limited to, one of polycarbonate, silicone rubber, EPDM rubber, nitrile rubber, fluororubber, thermoplastic elastomer, thermoplastic polyurethane, polypropylene elastomer, polyvinyl chloride, polypropylene, nylon, or polyurethane foam.

[0122] In the above technical solution, the first part 2021 can also undergo elastic deformation. During the process of the second part 2022 being inserted into the first gap 33, the first part 2021 can better cooperate with the second part 2022 so that the second part 2022 can be smoothly inserted into the first gap 33.

[0123] According to some embodiments of this application, the main body 201 can be integrally formed with the engaging part 202.

[0124] In some embodiments, the main body 201 and the engaging portion 202 may be integrally injection molded. For example, the elastic insulating protective tooling 200 may be integrally injection molded from polycarbonate material.

[0125] In the above technical solution, the main body 201 and the engaging part 202 are integrally formed, which makes the insulating protective tooling 200 have high structural strength, high production efficiency and good dimensional consistency.

[0126] According to some embodiments of this application, there are two engaging portions 202, and the two engaging portions 202 are arranged opposite each other along the width direction X of the main body portion 201.

[0127] When the insulating protective fixture 200 is installed on the top of the battery cell 20, the width direction of the main body 201 can be parallel to the width direction of the battery cell 20. The two engaging parts 202 respectively engage with the first gap 33 corresponding to the two connecting pieces 30 on the top of the battery cell 20, thereby improving the stability of the installation of the insulating protective fixture 200.

[0128] In some embodiments, the two engaging portions 202 may connect the two sides of the main body portion 201.

[0129] In other embodiments, the two engaging portions 202 may also connect to the surface of the main body 201 along its thickness direction, the thickness direction of the main body 201 being perpendicular to both its width direction and its length direction Y. In other words, the distance between the two engaging portions 202 along the width direction of the main body 201 may be less than the dimension of the main body 201 along its width direction.

[0130] In the above technical solution, the two engaging parts 202 can improve the stability of the insulating protective fixture 200 located on top of the battery cell 20, and the two engaging parts 202 form a redundant structure, so that when one engaging part 202 fails, the other side can still provide the engaging function.

[0131] According to some embodiments of this application, two engaging portions 202 are respectively connected to both sides of the main body portion 201 along the width direction.

[0132] The two engaging portions 202 can extend along the length direction Y of the main body portion 201.

[0133] By providing engaging portions 202 on both sides of the main body 201 along the width direction, the insulating protective tooling 200 and the connecting piece 30 can be symmetrically engaged and positioned on both sides, resulting in uniform assembly force and effectively improving assembly stability and positioning accuracy.

[0134] According to some embodiments of this application, the thickness of the main body 201 is 0.3 mm to 0.7 mm.

[0135] For example, the thickness of the main body 201 can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, or 0.7mm. The main body 201 can be plate-shaped, so that the thickness of the main body 201 is relatively uniform.

[0136] The thickness of the main body 201 is 0.3mm to 0.7mm. On the one hand, this ensures that the thickness of the main body 201 is not too small, which to some extent avoids the problems of deformation, warping, and cracking of the main body 201, improves its protective ability, and gives the main body 201 good insulation and withstand voltage performance, reducing the risk of being broken down. On the other hand, within this range, the thickness of the main body 201 is not too large, which can reduce the risk of the main body 201 damaging the top of the battery cell 20, and can also reduce the cost of the insulation protection tooling 200.

[0137] According to some embodiments of this application, the thickness of the engaging portion 202 is 0.3 mm to 0.7 mm.

[0138] For example, the thickness of the engaging portion 202 can be 0.3mm, 0.4mm, 0.5mm, 0.6mm or 0.7mm.

[0139] In some embodiments, the thickness of the engaging portion 202 may be equal to the thickness of the main body portion 201.

[0140] In other embodiments, the thickness of the engaging portion 202 may not be equal to the thickness of the main body portion 201.

[0141] The thickness of the engaging part 202 is 0.3mm to 0.7mm. On the one hand, this ensures that the thickness of the engaging part 202 is not too small, which to some extent avoids the problems of easy deformation, warping, and cracking of the main body 201, and allows it to be engaged relatively stably in the first gap 33. On the other hand, within this range, the thickness of the engaging part 202 is not too large, so that the engaging part 202 can be easily engaged in the first gap 33 of different thicknesses and sizes, thereby accommodating a variety of battery cells 20 of different specifications and sizes, and reducing the cost of the insulation protection tooling 200.

[0142] According to some embodiments of this application, the surface energy of the main body 201 is ≥30mN / m.

[0143] Surface energy is a physical quantity that measures the energy or contractile force per unit length of a solid or liquid surface. For the main body 201, the greater the surface energy, the less likely it is to cause air gap breakdown and creepage hazards during high voltage and insulation tests.

[0144] In some embodiments, the surface energy of the main body 201 can be 30mN / m, 33mN / m, 35mN / m, 38mN / m, 40mN / m, 43mN / m, 45mN / m, 48mN / m, 50mN / m, 53mN / m, 55mN / m, 58mN / m or 60mN / m.

[0145] The surface energy of the main body 201 is ≥30mN / m, which can reliably reduce the risk of electrostatic adsorption and dust accumulation caused by the low surface energy of the main body 201, reduce the adverse effects on insulation performance, and thus improve the insulation protection performance of the battery cell pack.

[0146] According to some embodiments of this application, the surface energy of the engaging portion 202 is ≥30mN / m.

[0147] In some embodiments, the surface energy of the engaging portion 202 can be 30mN / m, 33mN / m, 35mN / m, 38mN / m, 40mN / m, 43mN / m, 45mN / m, 48mN / m, 50mN / m, 53mN / m, 55mN / m, 58mN / m or 60mN / m.

[0148] In some embodiments, the surface energy of the engaging portion 202 may be the same as the surface energy of the main body portion 201.

[0149] In other embodiments, the surface energy of the engaging portion 202 may also be different from the surface energy of the main body portion 201.

[0150] The surface energy of the locking part 202 is ≥30mN / m, which can reliably reduce the risk of electrostatic adsorption and dust accumulation caused by the low surface energy of the locking part 202, and reduce the adverse effects on insulation performance.

[0151] The technical solution of this application will be further described below with reference to a specific embodiment.

[0152] An insulating protective fixture 200 is used to protect a battery cell assembly, which includes multiple battery cells 20 stacked in the same direction. Adjacent battery cells 20 are connected by a connecting piece 30 located on top of the battery cell 20. A first gap 33 exists between the connecting piece 30 and the top surface of the battery cell 20. The insulating protective fixture 200 includes a main body 201 and two engaging parts 202. The main body 201 is used to cover the top of at least one battery cell 20 in the battery cell assembly, and the main body 201 is located on the side of the connecting piece 30 away from the battery cell 20. The engaging parts 202 are connected to the main body 201 and are bent relative to the main body 201 to form a receiving cavity 1 together with the main body 201. The receiving cavity 1 has an opening facing the battery cell 20. The engaging parts 202 are used to engage within the first gap 33 so that at least a portion of the connecting piece 30 is located within the receiving cavity 1. Two engaging portions 202 are respectively connected to the two sides of the main body portion 201 along the width direction, and each engaging portion 202 extends along the length direction of the main body portion 201.

[0153] The heat deformation temperature of the insulating protective fixture 200 is greater than or equal to 120℃. In the insulation test, under a continuous application of 1000V voltage for 60 seconds, the resistance of the insulating protective fixture 200 is greater than or equal to 500MΩ. In the withstand voltage test, under a continuous application of 2700V voltage for 60 seconds, the leakage current flowing through the insulating protective fixture 200 is less than or equal to 1mA.

[0154] The engaging portion 202 includes a first portion 2021 and a second portion 2022. The first portion 2021 is connected to the main body portion 201 and is bent relative to the main body portion 201. The second portion 2022 is connected to the side of the first portion 2021 opposite to the main body portion 201, and is bent relative to the first portion 2021, and is disposed opposite to the main body portion 201. For example, the angle between the plane containing the first portion 2021 and the plane containing the main body portion 201 can be 75°.

[0155] For example, the plane in which the second part 2022 is located can be parallel to the plane in which the main part 201 is located.

[0156] For example, the plane where the second part 2022 is located may also have an angle with the plane where the main part 201 is located, and the second part 2022 may be bent toward the side where the main part 201 is located.

[0157] The main body 201 is plate-shaped, and the first part 2021 and the second part 2022 are both straight line segments. The angle between the first part 2021 and the main body 201 is less than 90°.

[0158] The engaging part 202 and the main body 201 are made of elastic materials. Among them, the elastic insulating protective tooling 200 can be integrally injection molded from polycarbonate material.

[0159] The thickness of the main body 201 is 0.5 mm, and the thickness of the engaging part 202 is 0.5 mm.

[0160] The surface energy of the main body 201 and the engaging part 202 is ≥30mN / m.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An insulating protective tooling, characterized in that, The insulating protective fixture is used to protect a battery cell assembly, which includes multiple battery cells stacked in the same direction. Adjacent battery cells are connected by a connecting piece located on top of the battery cells, and a first gap exists between the connecting piece and the top surface of the battery cell. The insulating protective fixture includes: The main body is used to cover the top of at least one of the battery cells in the battery cell group, and the main body is located on the side of the connecting piece opposite to the battery cell; At least one engaging portion is connected to the main body portion, the engaging portion is bent relative to the main body portion to form a receiving cavity together with the main body portion, the receiving cavity having an opening toward the battery cell, the engaging portion being used to engage within the first gap such that at least a portion of the connecting piece is located within the receiving cavity.

2. The insulating protective fixture according to claim 1, characterized in that, The angle between the engaging part and the main body is less than or equal to 90°.

3. The insulating protective fixture according to claim 1, characterized in that, The engaging portion includes: The first part is connected to the main body part, and the first part is bent relative to the main body part; The second part is connected to the side of the first part that is away from the main body part. The second part is bent relative to the first part and is disposed opposite to the main body part.

4. The insulating protective fixture according to claim 3, characterized in that, The angle between the first part and the main body part is less than or equal to 90°.

5. The insulating protective fixture according to claim 3, characterized in that, The plane containing the second part is parallel to the plane containing the main part.

6. The insulating protective fixture according to claim 5, characterized in that, The engaging portion further includes a third portion, which is connected to the side of the second portion away from the first portion. The third portion is bent relative to the second portion and is disposed opposite to the first portion.

7. The insulating protective fixture according to claim 3, characterized in that, The plane containing the second part forms an angle with the plane containing the main part, and the second part bends toward the side containing the main part.

8. The insulating protective fixture according to claim 7, characterized in that, The second part is made of elastic material.

9. The insulating protective fixture according to claim 8, characterized in that, The first part is made of elastic material.

10. The insulating protective fixture according to any one of claims 1-9, characterized in that, The main body and the engaging part are integrally formed.

11. The insulating protective fixture according to any one of claims 1-9, characterized in that, The number of the engaging parts is two, and the two engaging parts are arranged opposite each other along the width direction of the main body.

12. The insulating protective fixture according to claim 11, characterized in that, The two engaging parts are respectively connected to both sides of the main body in the width direction.

13. The insulating protective fixture according to any one of claims 1-9, characterized in that, The thickness of the main body is 0.3mm to 0.7mm.

14. The insulating protective fixture according to any one of claims 1-9, characterized in that, The thickness of the engaging part is 0.3mm to 0.7mm.

15. The insulating protective fixture according to any one of claims 1-9, characterized in that, The surface energy of the main body is ≥30mN / m.

16. The insulating protective fixture according to any one of claims 1-9, characterized in that, The surface energy of the engaging part is ≥30mN / m.

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