Insulating patch, battery monomer, battery and electric device

Abstract

The utility model relates to the technical field of batteries, in particular to an insulating patch, a battery monomer, a battery and an electric device. The insulating patch comprises a patch body and an electrode identifier, the electrode identifier is used for identifying the polarity of a single battery, the electrode identifier is a sunken part which is formed by inwards sinking an end surface of the patch body, the sunken part is formed by processing through a laser engraving process, and the electrode identifier is formed by processing through the laser engraving process. The problem of poor waste discharge at the hole position when the positive electrode mark and the negative electrode mark are formed in a die cutting mode is avoided, and the qualification rate of insulation patch production is improved. The battery monomer has high qualified rate and production efficiency by applying the insulating patch. By applying the battery monomer, the battery has relatively high qualified rate and production efficiency. By applying the battery, the power utilization device has relatively high qualified rate and production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an insulating patch, a battery cell, a battery and an electrical device. Background Art

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric bicycles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy planes, and power tools. During the production process, the sides and bottom surfaces of the battery cell housings must be coated or sprayed with insulating material, and the end caps of the battery cells must be affixed with insulating patches to ensure the insulation performance of the battery cells.

[0003] In order to facilitate staff to distinguish the positive and negative poles of the battery cells, a positive electrode mark "+" and / or a negative electrode mark "-" are usually set on the insulating patch to indicate the positive and negative electrode marks of the battery cells, wherein the electrode mark is a through hole passing through the insulating patch. In the prior art, the positive electrode mark and the negative electrode mark are usually formed on the insulating patch by die-cutting.

[0004] Since the end cap generally integrates multiple functional areas such as electrode terminals, explosion-proof mechanisms, and liquid injection holes, the insulating patch also needs to have electrode terminal avoidance holes, explosion-proof mechanism avoidance holes, etc., which makes the spatial layout of the insulating patch very compact. In order to ensure the insulation effect, the size of the positive and negative electrode logos will be minimized as much as possible. Generally, the size of the positive and negative electrode logo holes are controlled at 3mm in height / width directions. During the production process of the insulating patch, the positive or negative electrode logo hole position is often not completely cut off, and the waste discharge is poor, which affects the production yield.

[0005] Therefore, there is an urgent need for an insulating patch, a battery cell, a battery and an electrical device to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide an insulating patch, a battery cell, a battery and an electrical device, which form electrode markings through laser engraving technology, thereby solving the problem of poor waste discharge at the hole position of the electrode marking in the prior art and improving the yield rate of insulating patch production.

[0007] To achieve the above objectives, the following technical solutions are provided:

[0008] Insulation patch, including:

[0009] the patch body; and

[0010] The electrode marker is used to identify the polarity of the battery cell. The electrode marker is a recessed portion recessed inward from the end surface of the patch body, and the recessed portion is formed by laser engraving.

[0011] As an optional solution, the depth of the recessed portion is d, and the thickness of the patch body is D, wherein d / D is greater than or equal to 0.1 and less than 1.

[0012] As an optional solution, the d is greater than or equal to 0.01 mm and less than or equal to 0.15 mm.

[0013] As an optional solution, D is greater than or equal to 0.1 mm or less than or equal to 0.15 mm.

[0014] As an optional solution, the electrode identification includes:

[0015] A positive electrode marker includes a first line and a second line arranged crosswise, the first line extending along a first direction, the second line extending along a second direction, the first direction being perpendicular to the second direction, the dimension of the first line along the first direction being a first dimension L1, and the dimension of the second line along the second direction being a second dimension L2; wherein L1 is greater than or equal to 4 mm and less than or equal to 7 mm, and / or L2 is greater than or equal to 4 mm and less than or equal to 7 mm.

[0016] As an optional solution, the electrode identification includes:

[0017] The negative electrode mark extends along the first direction. The dimension of the negative electrode mark along the first direction is a third dimension L3, and L3 is greater than or equal to 4 mm and less than or equal to 7 mm.

[0018] As an optional solution, the insulating patch further includes:

[0019] An adhesive layer, one side of which is in contact with the patch body, and the other side of which is used to connect with the end cover.

[0020] A battery cell includes a shell, an end cover arranged thereon, and the above-mentioned insulating patch, wherein the shell has a accommodating cavity and an opening connected to the accommodating cavity; the end cover covers the opening, and the electrode assembly is located in the accommodating cavity; the insulating patch is affixed to the outer surfaces of all the end covers.

[0021] A battery comprises the above-mentioned battery cell or the above-mentioned insulating patch.

[0022] The electrical device includes the above-mentioned battery or the above-mentioned battery cell or the above-mentioned insulating patch.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The insulating patch provided by the utility model includes a patch body and an electrode marker. The electrode marker is used to identify the polarity of the battery cell. The electrode marker is a recessed portion recessed inward from the end surface of the patch body. The recessed portion is formed by a laser engraving process. The electrode marker is formed by the laser engraving process, which solves the problem of poor waste discharge at the position of the hole of the electrode marker in the prior art and improves the qualified rate of the insulating patch production.

[0025] The battery cell provided by the utility model has a high qualification rate and production efficiency by applying the above-mentioned insulating patch.

[0026] The battery provided by the utility model has a high qualification rate and production efficiency by applying the above-mentioned battery monomer.

[0027] The power-consuming device provided by the utility model has a high qualification rate and production efficiency by applying the above-mentioned battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 A schematic structural diagram of a vehicle provided in an embodiment of the present utility model;

[0030] Figure 2 An exploded view of a battery cell provided in an embodiment of the present utility model;

[0031] Figure 3 An exploded view of an insulating patch provided in an embodiment of the present utility model;

[0032] Figure 4 A cross-sectional view of an insulating patch provided in an embodiment of the present utility model.

[0033] Reference numerals:

[0034] 1000. Vehicle;

[0035] 100, battery; 200, controller; 300, motor;

[0036] 10. Insulating patch; 11. First avoidance space; 12. Second avoidance space; 13. Positive electrode mark; 131. First line; 132. Second line; 14. Negative electrode mark; 15. Patch body; 151. End face; 16. Adhesive layer;

[0037] 20. Battery cell; 21. Housing; 22. End cap; 221. Outer surface; 23. Insulating film; 24. Electrode terminal; 25. Liquid injection hole; 26. Explosion-proof mechanism. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0040] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0041] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0042] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0044] This embodiment provides an electric device, which includes a battery 100 and an electric mechanism. The battery 100 can provide electric energy to the electric mechanism, thereby enabling the electric mechanism to automatically complete preset actions through electric energy, thereby ensuring good performance of the electric mechanism.

[0045] Specifically, the power-consuming mechanism may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, or an electric tool. A vehicle may be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle; a new energy vehicle may be a pure electric vehicle or a hybrid vehicle; a spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft; an electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy; and an electric tool may include a metal cutting power tool, a grinding power tool, an assembly power tool, and a railway power tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, or an electric planer. This embodiment does not limit the above-mentioned power-consuming mechanisms.

[0046] The following examples are for convenience of description. Figure 1As shown, an electric device according to an embodiment of the present application is taken as an example of a vehicle 1000 for description. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements of the vehicle 1000 during startup, navigation, and driving.

[0047] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0048] The battery 100 provided in this embodiment includes at least two battery cells 20 and a battery management system, which is used to manage the battery cells 20 to improve the utilization of the battery cells 20 and extend the service life of the battery 100. It should be noted that the battery management system is a prior art and will not be described in detail in this embodiment.

[0049] It is understood that the battery 100 mentioned in this embodiment refers to a single physical module including at least two battery cells 20 to provide higher voltage and capacity. For example, the battery 100 mentioned in this application may include a battery module or a battery pack.

[0050] The battery 100 may also include other structures. For example, the battery 100 may include a busbar component for electrically connecting the multiple battery cells 20. Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cells 20 may be cylindrical, flat, rectangular, or other shapes.

[0051] like Figure 2 As shown, the battery cell 20 provided in this embodiment includes a housing 21, an end cap 22, and an electrode assembly. The housing 21 has a receiving cavity and an opening communicating with the receiving cavity; the end cap 22 covers the opening to form a sealed space for accommodating the electrode assembly and electrolytes. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell 20 primarily operates by the movement of metal ions between the positive and negative electrode sheets.

[0052] In this embodiment, the housing 21 is provided with two openings, and the end caps 22 are also provided with two corresponding openings, which are respectively located at both ends along the length direction of the housing 21. In other embodiments, the opening can also be provided with one, three, or more, which can be adaptively selected according to actual needs.

[0053] like Figure 2 As shown, the battery cell 20 further includes an electrode terminal 24 , which is disposed on the end cap 22 . The electrode terminal 24 is connected to the electrode assembly and can be connected to an electrical device to realize the power supply function of the electrode assembly to the electrical device.

[0054] In this embodiment, there are two electrode terminals 24 , one of which is a positive electrode column and the other is a negative electrode column. The positive electrode column and the negative electrode column are correspondingly arranged on the end caps 22 located at both ends of the shell 21 in the length direction.

[0055] At least one end cover 22 is provided with a liquid injection hole 25 , through which electrolyte is injected into the accommodating cavity of the housing 21 .

[0056] like Figure 2 As shown, the battery cell 20 further includes an explosion-proof mechanism 26 , which is disposed on at least one end cover 22 . When the internal pressure of the battery cell 20 reaches a predetermined threshold, the internal pressure is released through the explosion-proof mechanism 26 , thereby improving the safety of the battery cell 20 .

[0057] Specifically, the explosion-proof mechanism 26 includes an explosion-proof valve and a protective sheet. The end cap 22 is provided with an explosion-proof hole, and the explosion-proof valve is welded into the explosion-proof hole. During use, when gas is generated within the housing 21 and the air pressure within the housing 21 reaches the explosion-proof threshold of the explosion-proof valve, the explosion-proof valve ruptures, and the gas is discharged from the explosion-proof hole, releasing the internal pressure of the housing 21 and thus preventing the housing 21 from bursting. The protective sheet is disposed within the explosion-proof hole and is located on the side of the explosion-proof valve away from the electrode assembly. The protective sheet is used to protect the explosion-proof valve and prevent it from rupturing and failing due to external pressure from the battery cell 20.

[0058] Optionally, the shell 21 of the battery cell 20 is coated with an insulating film 23 or sprayed with insulating material, and an insulating patch 10 is provided on the outer surface 221 of the end cover 22 of the battery cell 20 to ensure the insulation performance of the battery cell 20 .

[0059] In order to facilitate staff to distinguish the positive and negative poles of the battery 100, an electrode mark is usually set on the insulating patch 10, wherein the electrode mark is a through hole passing through the insulating patch 10. In the prior art, the electrode mark is usually formed on the insulating patch 10 by die-cutting.

[0060] Since the end cap 22 is integrated with multiple functional areas such as the electrode terminal 24, the explosion-proof mechanism 26, the liquid injection hole 25, etc., the insulating patch 10 also needs to have an electrode terminal avoidance hole, an explosion-proof mechanism avoidance hole, etc., so that the spatial layout of the insulating patch 10 is very compact. In order to ensure the insulation effect, the size of the positive electrode mark 13 and the negative electrode mark 14 will be reduced as much as possible. Generally, the size of the positive electrode mark 13 and the negative electrode mark 14 are controlled to 3mm in the height / width direction. During the production process of the insulating patch 10, problems such as the hole position of the positive electrode mark 13 or the negative electrode mark 14 is not completely cut off and the waste discharge is poor will often occur, affecting the production yield.

[0061] In order to solve the above problems, Figure 2-Figure 4 As shown, the insulating patch 10 provided in this embodiment includes a patch body 15 and an electrode marker. The electrode marker is used to identify the polarity of the battery cell 20. The electrode marker is a recessed portion recessed inward from the end face 151 of the patch body 15. The recessed portion is formed by a laser engraving process. The electrode marker is formed by the laser engraving process, which solves the problem of poor waste discharge at the position of the hole of the electrode marker in the prior art and improves the production yield of the insulating patch 10.

[0062] like Figure 4 As shown, the depth of the recessed portion is d, and the thickness of the patch body 15 is D, wherein d / D is greater than or equal to 0.1 and less than 1. By controlling the value of d / D within the range of greater than or equal to 0.2 and less than 1, the electrode marking is clearer, which is convenient for staff to identify, and at the same time can ensure a better insulation effect of the insulating patch 10.

[0063] In an optional embodiment, the value of d / D may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9.

[0064] Optionally, the depth d of the recessed portion is greater than or equal to 0.01 mm and less than or equal to 0.15 mm, so that the electrode mark has a certain depth, thereby preventing the electrode mark from being too shallow and inconvenient for staff to identify.

[0065] In an optional embodiment, the depth d of the recess may be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm or 0.15 mm.

[0066] Optionally, the thickness D of the patch body 15 is greater than or equal to 0.1 mm or less than or equal to 0.15 mm, so that the insulating sheet 10 can ensure a good insulation effect while preventing the patch body 15 from being too thick, thereby saving the material cost of the insulating patch 10 .

[0067] In an optional embodiment, the thickness D of the patch body 15 may be 0.11 mm, 0.12 mm, 0.13 mm, or 0.15 mm.

[0068] like Figure 2 As shown, the electrode marker includes a negative electrode marker 14, which extends along the first direction. The size of the negative electrode marker 14 along the first direction is a third size L3, which is greater than or equal to 4 mm and less than or equal to 7 mm. This can prevent the size of the negative electrode marker 14 from being too small and inconvenient to identify; and can prevent the size of the negative electrode marker 14 from being too large, causing interference with the part of the insulating patch 10 that avoids the functional area.

[0069] In an optional embodiment, the value of the third dimension L3 of the negative electrode mark 14 along the first direction may be 4 mm, 5 mm, 6 mm or 7 mm.

[0070] like Figure 2 As shown, the electrode identifier includes a positive electrode identifier 13, and the positive electrode identifier 13 includes a first line 131 and a second line 132 arranged crosswise. The first line 131 extends along a first direction, and the second line 132 extends along a second direction. The first direction is perpendicular to the second direction. The size of the first line 131 along the first direction is a first size L1, and the size of the second line 132 along the second direction is a second size L2; wherein, L1 is greater than or equal to 4 mm and less than or equal to 7 mm, and / or, L2 is greater than or equal to 4 mm and less than or equal to 7 mm, which can avoid the size of the positive electrode identifier 13 being too small and inconvenient to identify; and can avoid the size of the positive electrode identifier 13 being too large, causing interference with the part of the insulating patch 10 that avoids the functional area.

[0071] In an optional embodiment, the dimension L1 of the first line 131 along the first direction may be 4 mm, 5 mm, 6 mm or 7 mm.

[0072] In an optional embodiment, the dimension L2 of the second line 132 along the first direction may be 4 mm, 5 mm, 6 mm, or 7 mm.

[0073] Optionally, the insulating patch 10 is further covered with a rubber layer 16 , one side of the rubber layer 16 is in contact with the patch body 15 , and the other side of the rubber layer 16 is used to connect with the end cover 22 , so as to facilitate quick attachment of the patch body 15 to the end cover 22 .

[0074] like Figure 2 and Figure 3 As shown, the insulating patch 10 is provided with a first avoidance space 11, and at least part of the electrode terminal 24 is accommodated in the first avoidance space 11 to prevent the insulating patch 10 from interfering with the electrode terminal 24. Specifically, the first avoidance space 11 can be a notch or a through hole.

[0075] like Figure 2 and Figure 3 As shown, a second avoidance space 12 is provided on the insulating patch 10 , and at least a portion of the explosion-proof mechanism 26 is accommodated in the second avoidance space 12 to prevent the insulating patch 10 from interfering with the explosion-proof mechanism 26 .

[0076] Optionally, the patch body 15 is made of PC (Polycarbonate), PE (Polyethylen), PVC (Polyethylene), PPS (Phenylenesulfide), PET (Polyethyleneterephthalate), PP (Polypropylene), nylon and ABS (AcrylonitrileButadieneStyreneplastic). The above materials have good insulation properties and are relatively low in price, which helps to reduce production costs.

[0077] Note that throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with those embodiments or examples are included in at least one embodiment or example of the present invention. Throughout this specification, the schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be incorporated in any suitable manner in any one or more embodiments or examples.

[0078] The above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are readily apparent to those skilled in the art without departing from the scope of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include other equivalent embodiments without departing from the spirit of the present invention. The scope of the present invention is determined by the appended claims.

Claims

1. Insulation patch, characterized in that, include: Patch body (15); as well as An electrode marker is used to identify the polarity of a battery cell. The electrode marker is a recessed portion recessed inwardly from the end surface (151) of the patch body (15). The recessed portion is formed by laser engraving.

2. The insulating patch according to claim 1, characterized in that The depth of the recessed portion is d, and the thickness of the patch body (15) is D, wherein d / D is greater than or equal to 0.1 and less than 1.

3. The insulating patch according to claim 2, characterized in that: The d is greater than or equal to 0.01 mm and less than or equal to 0.15 mm.

4. The insulating patch according to claim 2, characterized in that: The D is greater than or equal to 0.1 mm or less than or equal to 0.15 mm.

5. The insulating patch according to claim 1, characterized in that: The electrode identification includes: A positive electrode marker (13) includes a first line (131) and a second line (132) arranged crosswise, wherein the first line (131) extends along a first direction, and the second line (132) extends along a second direction, the first direction is perpendicular to the second direction, the dimension of the first line (131) along the first direction is a first dimension L1, and the dimension of the second line (132) along the second direction is a second dimension L2; wherein L1 is greater than or equal to 4 mm and less than or equal to 7 mm, and / or L2 is greater than or equal to 4 mm and less than or equal to 7 mm.

6. The insulating patch according to claim 1, characterized in that The electrode identification includes: The negative electrode marker (14) extends along the first direction, and the dimension of the negative electrode marker (14) along the first direction is a third dimension L3, and L3 is greater than or equal to 4 mm and less than or equal to 7 mm.

7. The insulating patch according to any one of claims 1 to 6, characterized in that: The insulating patch also includes: Patch body (15); and An adhesive layer (16), one side of the adhesive layer (16) is bonded to the patch body (15), and the other side of the adhesive layer (16) is used to connect to the end cover (22).

8. A battery cell comprising a housing (21) and an end cover (22) disposed thereon, characterized in that: The battery cell further comprises an insulating patch according to any one of claims 1 to 7, wherein the insulating patch is attached to the outer surface (221) of all the end covers (22).

9. A battery, characterized in that The invention comprises the battery cell according to claim 8 or the insulating patch according to any one of claims 1 to 7.

10. An electrical device, characterized in that: The invention comprises the battery according to claim 9, the battery cell according to claim 8, or the insulating patch according to any one of claims 1 to 7.

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