Shell assembly, battery, battery pack and electric equipment

Abstract

The utility model provides a shell assembly, a battery, a battery pack and electric equipment, the shell assembly comprises a shell and a two-dimensional code, and the shell is provided with a first area; the two-dimensional code is arranged in the first area of the shell; the two-dimensional code comprises a secret code; the surface roughness of the first area is Ra mm, the area of the secret code is S mm < 2 >, and the Ra mm and the S mm < 2 > meet the relational expression that S / Ra is larger than 1.8 and smaller than or equal to 90000. According to the invention, the quality of the two-dimensional code can be improved, the code scanning recognition rate can be improved, and the readability and stability of the two-dimensional code can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of two-dimensional codes, in particular to a shell assembly, a battery, a battery pack and an electrical equipment. BACKGROUND

[0002] At present, the surface of a battery shell is usually provided with a two-dimensional code, which is used to bind and trace the whole process data information from the battery cell components to the whole vehicle level.

[0003] In the related art, the two-dimensional code is generally composed of a dark code and a clear code, wherein the dark code refers to a scannable pattern formed by laser etching or pasting, and the clear code refers to visible numerical or alphabetical coding, and then the information is obtained by scanning and identifying the dark code through a scanning device such as a code scanner. However, the two-dimensional code technology has the problem of poor code quality, which leads to low code scanning recognition rate and affects production tracing and after-sales management. Therefore, an optimization scheme is urgently needed to improve the readability and stability of the two-dimensional code on the battery shell. CONTENT OF THE UTILITY MODEL

[0004] Based on this, the present application provides a shell assembly, a battery, a battery pack and an electrical equipment, which can improve the quality of the two-dimensional code, thereby improving the code scanning recognition rate, and further improving the readability and stability of the two-dimensional code.

[0005] In a first aspect, the present application provides a shell assembly, comprising:

[0006] a shell, the shell having a first region thereon;

[0007] and a two-dimensional code, the two-dimensional code being arranged on the first region of the shell; the two-dimensional code comprising a dark code;

[0008] the surface roughness of the first region is Ra mm, and the area of the dark code is S mm 2 , and the relationship between Ra mm and S mm 2 satisfies the following formula:

[0009] 1.8 < S / Ra ≤ 90000.

[0010] In a possible implementation, the relationship between Ra mm and S mm 2 satisfies the following formula:

[0011] 16 < S / Ra ≤ 25600.

[0012] In a possible implementation, S mm 2 satisfies the following formula:

[0013] 9 ≤ S ≤ 900.

[0014] In a possible implementation, S mm2 The relationship is satisfied:

[0015] 16≤S≤256.

[0016] In a possible implementation, the Ra mm satisfies the relationship:

[0017] 0.01≤Ra≤5.

[0018] In a possible implementation, the Ra mm satisfies the relationship:

[0019] 0.01≤Ra≤1.

[0020] In a possible implementation, the two-dimensional code further comprises: at least one bright code arranged with the dark code, and the interval distance between the dark code and any one of the bright codes is D mm, and the D mm satisfies the relationship:

[0021] 0≤D≤5.

[0022] In a possible implementation, the D mm, the Ra mm and the S mm 2 satisfy the relationship:

[0023] 1.8<S / Ra+D≤90005.

[0024] In a possible implementation, the D mm, the Ra mm and the S mm 2 satisfy the relationship:

[0025] 16<S / Ra+D≤25605.

[0026] In a possible implementation, the dark code comprises a plurality of patterns, and the plurality of patterns comprises: a dot pattern and / or a line pattern;

[0027] The dot pattern is a non-defective dot, the line pattern is a non-defective line, and the straightness of the line pattern is L mm, and the L mm satisfies the relationship:

[0028] 0≤L≤3.

[0029] In a possible implementation, each of the patterns corresponds to a sub-region on the first region, and the absolute value of the roughness difference between any two sub-regions satisfies:

[0030] 0≤|ΔRa|≤3.

[0031] In a possible implementation, the shell further has a second region, and the second region is provided with a liquid injection hole;

[0032] The surface roughness of the first region is greater than or less than the roughness around the second region.

[0033] In a second aspect, the application provides a battery, comprising: a cell and the shell assembly as described above; the cell is arranged in the interior of the shell assembly.

[0034] In a possible implementation, the shell comprises: a shell body and a cover plate, one end of the shell body has an opening, and the cover plate covers the opening;

[0035] The two-dimensional code is arranged on the cover plate.

[0036] In a third aspect, the application provides a battery pack, comprising: the battery as described above.

[0037] In a fourth aspect, the application provides an electrical equipment, comprising: the battery as described above or the battery pack as described above.

[0038] The shell assembly, the battery, the battery pack and the electrical equipment provided by the application, in the shell assembly, the two-dimensional code is arranged on the first region of the shell, the two-dimensional code comprises a secret code, the surface roughness Ra mm of the first region and the area S mm of the secret code satisfy the relationship: 1.8 < S / Ra ≤ 90000, the inventors of the application find through experiments that the surface roughness Ra mm of the first region and the area S mm of the secret code 2 satisfy the optimal matching relationship, which can ensure the readability of the two-dimensional code. By limiting 1.8 < S / Ra ≤ 90000, the area S mm of the secret code 2 can be adapted to the surface roughness Ra mm of the first region. In this way, the quality of the two-dimensional code can be improved, and then the code recognition rate can be improved, and then the readability and stability of the two-dimensional code can be improved. 2 BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0040] Figure 1 A structural schematic diagram of the shell assembly provided by the embodiments of the application;

[0041] Figure 2 A structural schematic diagram of the cover plate in the shell assembly provided by the embodiments of the application;

[0042] ​Figure 3 A structural schematic diagram of a two-dimensional code in a shell assembly provided by an embodiment of the present application.

[0043] Explanation of reference signs:

[0044] 100 - shell assembly;

[0045] 110 - shell;

[0046] 111 - shell body;

[0047] 112 - cover plate;

[0048] 1121 - first area;

[0049] 1122 - second area;

[0050] 120 - two-dimensional code;

[0051] 121 - dark code;

[0052] 1211 - dot pattern;

[0053] 1212 - line pattern;

[0054] 122 - bright code;

[0055] 130 - liquid injection hole;

[0056] D - interval distance. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiments of the present application will be described in more detail below in combination with the drawings of the preferred embodiments of the present application. In the drawings, the same or similar reference signs represent the same or similar components or components with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0058] In the description of the present application, it should be noted that unless explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or indirect connection through an intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0060] The terms "first", "second", "third" (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a particular order or sequence.

[0061] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or display that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or displays.

[0062] At present, the surface of the battery shell is usually provided with a two-dimensional code, which is used to bind and trace the whole process data information from the cell parts to the whole vehicle level.

[0063] In the related art, the two-dimensional code is generally composed of a dark code and a clear code, wherein the dark code refers to a scannable pattern formed by laser etching or pasting, and the clear code refers to visible numerical or alphabetical coding, and then the information is obtained by scanning and identifying the dark code through a scanning device such as a code scanner. However, the two-dimensional code technology has the problem of poor code quality, which leads to low code scanning recognition rate and affects production tracing and after-sales management.

[0064] Therefore, there is an urgent need for a new optimization scheme to improve the readability and stability of the two-dimensional code on the battery shell.

[0065] After repeated thinking and verification, the present application inventors designed a new shell assembly, battery, battery pack and electric equipment to solve the problems of the related art.

[0066] The technical solutions of the new shell assembly, battery, battery pack and electric equipment provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0067] Figure 1 A structural schematic diagram of the shell assembly provided by the embodiments of the present application. Figure 2 A structural schematic diagram of the cover plate in the shell assembly provided by the embodiments of the present application.

[0068] Reference Figure 1and Figure 2 As shown, this application embodiment provides a housing assembly 100, which may include a housing 110 and a QR code 120, wherein the housing 110 may have a first region 1121, and the QR code 120 may be disposed in the first region 1121 of the housing 110.

[0069] In this embodiment, the connection between the surface of the housing 110 and the QR code 120 is laser engraving or pasting, meaning that the QR code 120 may or may not have depth on the surface of the housing 110.

[0070] It is understood that in the embodiments of this application, the housing 110 may include a housing body 111 and a cover plate 112. The housing body 111 may be made of aluminum or aluminum alloy, and may have an opening. The cover plate 112 may be disposed on the housing body 111 and cover the opening.

[0071] In some embodiments, the QR code 120 may be disposed on the shell body 111, or in some other embodiments, the QR code 120 may be disposed on the cover plate 112. This application does not limit the specific embodiment in this regard.

[0072] For example, continue to refer to Figure 1 and Figure 2 As shown, the QR code 120 can be disposed on the cover plate 112. For example, the QR code 120 can be disposed on the surface of the cover plate 112 opposite to the shell body 111, and the QR code 120 is used for information binding and traceability.

[0073] It should be noted that, in this embodiment of the application, the number of QR codes 120 on the same housing component 100 can be one, two, three, or more, and this embodiment of the application does not limit this. For example, Figure 1 and Figure 2 In the text, the number of QR codes 120 is one.

[0074] In this embodiment, the QR code 120 may be exposed or covered by other components on the housing assembly 100, and this embodiment does not limit this.

[0075] Figure 3 This is a schematic diagram of a structure of the QR code 120 in the housing assembly 100 provided in an embodiment of this application.

[0076] Specifically, see Figure 3 As shown in this embodiment, the QR code 120 may include a coded message 121, wherein the surface roughness of the first region 1121 is Ra mm, and the area of ​​the coded message 121 is S mm. 2The surface roughness Ra mm of the first region 1121 and the area S mm of the cipher 121 2 The relationship between them can satisfy the following formula: 1.8 < S / Ra ≤ 90000.

[0077] The inventors of this application discovered that the surface roughness Ra mm of the first region 1121 is related to the area S mm of the code 121. 2 There exists an optimal matching relationship, which can improve the quality of QR code 120, thereby increasing the scanning yield and ensuring the readability of QR code 120.

[0078] By limiting 1.8 < S / Ra ≤ 90000, it is possible to make the area S mm of the cipher 121. 2 This is adapted to the surface roughness Ra mm of the first region 1121. For example, if the surface roughness Ra mm of the first region 1121 is large (i.e., the first region 1121 is relatively rough), a larger area S mm of the cipher is required. 2 To enhance light reflection contrast, when the surface roughness Ra mm of the first region 1121 is small (i.e., the first region 1121 is relatively smooth), the area S mm of the cipher can be reduced simultaneously. 2 To avoid energy scattering, the S / Ra value is used to quantize the area S mm of cipher 121. 2 The compatibility between the surface roughness Ra mm of the first region 1121 and the surface roughness Ra mm.

[0079] Specifically, in the embodiments of this application, the surface roughness Ra mm of the first region 1121 and the area S mm of the code 121 are... 2 The relationship between them can satisfy the formula: 16 < S / Ra ≤ 25600.

[0080] For example, in the embodiments of this application, the value of S / Ra can be 16, 50, 100, 200, 500, 1000, 5000, 10000, 20000 or 25600, etc. The embodiments of this application do not limit this value, nor are they limited to the above examples.

[0081] It should be noted that the numerical values ​​and ranges involved in this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0082] It should be noted that, in the embodiments of this application, the area S mm of the cipher 121 is... 2 The following relationship must be satisfied: 9 ≤ S ≤ 900. The area S mm of the cipher 121 is... 2 Too small a size will result in insufficient contrast, increasing the area of ​​cipher code 121 by S mm. 2The light signal receiving intensity of the code scanning device can be improved, and signal attenuation can be avoided on a rough surface. The area S of the dark code 121 is mm 2 Excessive area S will cause edge blur, and limit the area S of the dark code 121 to mm 2 The laser etching energy can be prevented from being dispersed, and the edge of the dark code 121 pattern can be ensured to be sharp.

[0083] Specifically, in the embodiment of the present application, the area S of the dark code 121 is mm 2 The relationship 16≤S≤256 can be met.

[0084] Specifically, in the embodiment of the present application, the area S of the dark code 121 is mm 2 may be 16mm 2 , 50mm 2 , 100mm 2 , 150mm 2 , 200mm 2 , 250mm 2 or 256mm 2 , etc. The present application is not limited thereto and is not limited to the above examples.

[0085] In the embodiment of the present application, the surface roughness Ra of the first area 1121 is mm, which can meet the relationship 0.01≤Ra≤5.

[0086] Specifically, in the embodiment of the present application, the surface roughness Ra of the first area 1121 is mm, which can meet the relationship 0.01≤Ra≤1.

[0087] Specifically, in the embodiment of the present application, the surface roughness Ra of the first area 1121 is mm, which can meet the relationship 0.01≤Ra≤1.

[0088] For example Figure 3As shown, in the embodiment of the present application, the two-dimensional code 120 can further include at least one bright code 122 arranged at intervals with the dark code 121, and the interval distance between the dark code 121 and any one of the bright codes 122 is D mm, which can satisfy the relationship: 0≤D≤5. By limiting the interval distance between the dark code 121 and the bright code 122, it can avoid that when the interval distance between the dark code 121 and the bright code 122 is too small, the reflected light of the bright code 122 easily interferes with the identification of the dark code 121 (such as reflection overlap), affecting the scanning code yield, and also avoid that when the interval distance between the dark code 121 and the bright code 122 is too large, the scanning code is difficult, which also affects the scanning code yield. In addition, it also allows no gap design between the dark code 121 and the bright code 122, which can further save space.

[0089] Exemplarily, in the embodiment of the present application, the interval distance D mm can be 0, 0.01 mm, 0.1 mm, 0.2 mm, 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, etc., which is not limited in the embodiment of the present application and is not limited to the above examples.

[0090] It should be noted that, in the embodiment of the present application, the bright code 122 can include at least one of numbers and letters. For example, the bright code 122 can be a pure number, a pure letter, or a combination of numbers and letters. For example, Figure 3 In the embodiment of the present application, the bright code 122 is a combination of numbers and letters.

[0091] In the embodiment of the present application, the interval distance D mm, the surface roughness Ra mm of the first area 1121, and the area S mm of the dark code 121 2 may satisfy the relationship: 1.8<S / Ra+D≤90005. By quantifying the synergistic relationship between the area S mm of the dark code 121, the surface roughness Ra mm of the first area 1121, and the interval distance D mm, the recognition rate of the two-dimensional code 120 can be improved. 2

[0092] Specifically, in some embodiments, the interval distance D mm, the surface roughness Ra mm of the first area 1121, and the area S mm of the dark code 121 2 may satisfy the relationship: 16<S / Ra+D≤25605.

[0093] Exemplarily, in the embodiment of the present application, the value of S / Ra+D can be 16, 50, 100, 200, 500, 1000, 5000, 10000, 20000, 25600, or 25605, etc., which is not limited in the embodiment of the present application and is not limited to the above examples.

[0094] ​It should be noted that in the embodiments of the present application, the area S mm of the code 121 2 The size of the code 121 can be measured by a two-dimensional measuring instrument, and the area S mm of the code 121 is the product of the length of the code 121 and the width of the code 121. 2 .

[0095] The surface roughness Ra mm of the first area 1121 can be measured by a roughness tester. The interval distance D mm between the code 122 and the code 121 can be measured by a two-dimensional measuring instrument, and if there are multiple codes 122, there will be multiple interval distances D mm.

[0096] The characterization method of the two-dimensional code 120 can be the scanning code yield, and a scanning code device such as SR700 of Keyence can be used to scan the two-dimensional code 120, and then the ratio of the number of two-dimensional codes 120 that can be normally recognized to the total number is calculated, that is, the scanning code yield of the two-dimensional code 120.

[0097] The following Table 1 shows the experimental data of the present inventor in the research process.

[0098] Table 1

[0099] Example Area S of the code 121 Surface roughness Ra of the first area 1121 S / Ra Separation distance D between the code 121 and the clear code 122 S / Ra+D Code scanning yield Example 1 9 0.01 900 0 900 98.82% Example 2 9 0.01 900 5 905 99.01% Example 3 9 4.99 1.804 0 1.804 98.03% Example 4 9 4.99 1.804 5 6.804 98.44% Example 5 900 0.01 90000 0 90000 98.47% Example 6 900 0.01 90000 5 90005 98.77% Example 7 900 4.99 180.4 0 180.4 98.01% Example 8 900 4.99 180.4 5 185.4 98.22% Example 9 16 0.01 1600 0 1600 99.12% Example 10 16 0.01 1600 5 1605 99.11% Example 11 16 0.99 16.16 0 16.16 99.34% Example 12 16 0.99 16.16 5 21.16 99.53% Example 13 256 0.01 25600 0 25600 99.29% Example 14 256 0.01 25600 5 25605 99.48% Example 15 256 0.99 258.59 0 258.59 99.25% Example 16 256 0.99 258.59 5 263.59 99.32% Example 17 36 0.2 180 2 182 99.72% Example 18 81 0.1 810 0.5 810.5 99.64% Example 19 100 0.4 250 1 251 99.52% Comparative Example 1 4 10 0.4 -2 0.5 48.21% Comparative Example 2 1200 0.001 1200000 11 1200011 Unable to manufacture

[0100] From the above table, it can be seen that by limiting 1.8 < S / Ra ≤ 90000, the area S mm of the code 121 2 is matched with the surface roughness Ra mm of the first area 1121, and the scanning code yield of the two-dimensional code 120 is high. In Comparative Example 1, the value of S / Ra is too small, which does not satisfy the above range, and the scanning code yield is only 48.21%. In Comparative Example 2, the value of S / Ra is too large, which does not satisfy the above range, and the two-dimensional code 120 cannot be manufactured.

[0101] In addition, if the interval distance between the code 121 and the code 122 is too small (for example, Comparative Example 1), the reflected light of the code 122 can easily interfere with the recognition of the code 121 (for example, reflection overlap), which can affect the scanning code yield. If the interval distance between the code 121 and the code 122 is too large, the scanning code is difficult, which also affects the scanning code yield.

[0102] Continuing to refer to Figure 3 In the embodiments of the present application, the code 121 can include multiple patterns, wherein the multiple patterns can include one or more dot patterns 1211, or the multiple patterns can include one or more line patterns 1212, or the multiple patterns can include one or more dot patterns 1211 and one or more line patterns 1212, which are not limited in the embodiments of the present application.

[0103] Specifically, in the embodiments of the present application, Figure 3 In the embodiments of the present application, the code 121 includes a plurality of dot patterns 1211 and a plurality of line patterns 1212.

[0104] It should be noted that, in the embodiments of the present application, the dot patterns 1211 can be non-defective dots, and the line patterns 1212 can be non-defective lines. The dot patterns 1211 and the line patterns 1212 of the code 121 are non-defective, the laser etching energy and focal length are optimized, and the continuity of the etching marks is ensured, so that the misjudgment of code scanning can be reduced. In this way, the quality of the dot patterns 1211 and the quality of the line patterns 1212 can be ensured, and thus the overall quality of the two-dimensional code 120 can be ensured.

[0105] In some embodiments, the straightness of the line pattern 1212 is L mm, and the straightness L mm of the line pattern 1212 can satisfy the relationship: 0≤L≤3. By limiting the straightness of the line pattern 1212, the linear precision of the laser etching path can be controlled, and bending or shaking can be avoided, thereby improving the positioning accuracy of the code scanning device.

[0106] It can be understood that the straightness L mm of the line pattern 1212 can be measured by three-dimensional measurement or other means, and the embodiments of the present application do not limit this.

[0107] Exemplarily, in the embodiments of the present application, the straightness L mm of the line pattern 1212 can be 0, 0.01, 0.1, 0.5, 1, 1.5, 2, 2.5 or 3, and the embodiments of the present application do not limit this and are not limited to the above examples.

[0108] It can be understood that, in some embodiments, the dot pattern 1211 also appears as a line frame under a magnifying glass. At this time, the straightness L mm of the line frame can satisfy the relationship: 0≤L≤3. Similarly, by limiting the straightness of the line frame, the linear precision of the laser etching path can be controlled, and bending or shaking can be avoided, thereby improving the positioning accuracy of the code scanning device.

[0109] It can be understood that, in the embodiments of the present application, each pattern can correspond to a sub-region on the first region 1121, and the absolute value of the roughness difference between any two sub-regions can satisfy: 0≤|ΔRa|≤3. By limiting the roughness difference, the uniformity of the laser energy distribution can be ensured, the etching mark depth is consistent, and the identification fluctuation caused by the reflectivity difference of the same code 121 is avoided.

[0110] Exemplarily, the absolute value |ΔRa| of the roughness difference between any two sub-regions can be 0, 0.01, 0.1, 0.5, 1, 1.5, 2, 2.5 or 3, and the embodiments of the present application do not limit this and are not limited to the above examples.

[0111] Of course, in some embodiments, for the same dot pattern 1211 or the same line pattern 1212, the absolute value of the roughness difference at each point in the sub-region corresponding to the dot pattern 1211 or the line pattern 1212 on the first region 1121 can satisfy: 0≤|ΔRa|≤3. Similarly, by limiting the roughness difference, the laser energy distribution can be homogenized, ensuring consistent scratch depth and avoiding recognition fluctuations caused by differences in reflectivity in the same dot pattern 1211 or line pattern 1212.

[0112] like Figure 2 As shown in this embodiment, the housing 110 may also have a second region 1122, which may be provided with a liquid injection hole 130. The surface roughness of the first region 1121 may be greater than or less than the roughness around the second region 1122. That is, in this embodiment, the roughness of the region where the QR code 120 is located is different from the roughness of the region where the liquid injection hole 130 is located.

[0113] The housing assembly 100 provided in this application has a QR code 120 disposed on a first region 1121 of the housing 110. The QR code 120 may include a hidden code 121. The surface roughness Ra mm of the first region 1121 is equal to the area S mm of the hidden code 121. 2 The relationship between them is: 1.8 < S / Ra ≤ 90000. The inventors of this application discovered through experiments that the surface roughness Ra mm of the first region 1121 is related to the area S mm of the code 121. 2 An optimal matching relationship exists, ensuring the readability of QR code 120. By limiting 1.8 < S / Ra ≤ 90000, the area S mm of cipher code 121 can be made larger. 2 It is adapted to the surface roughness Ra mm of the first region 1121. This improves the quality of the QR code 120, thereby increasing the scanning recognition rate, and further improving the readability and stability of the QR code 120.

[0114] This application embodiment also provides a battery, which may include: a battery cell and the aforementioned housing assembly 100, wherein the battery cell is disposed inside the housing assembly 100.

[0115] By incorporating the aforementioned housing assembly 100 into the battery, this embodiment of the application enables accurate binding and tracing of data information throughout the entire process from the housing 110 to the battery level.

[0116] This application also provides a battery pack, which may include the battery described above.

[0117] The embodiment of the present application can realize the accuracy of binding and tracing the whole-process data information from the shell 110 to the battery pack level.

[0118] The embodiment of the present application also provides a power consumption device, which can include the battery or the battery pack.

[0119] The power consumption device in the embodiment of the present application can be a conventional power consumption device in the field, for example, a power device (such as an electric vehicle), an electronic device (such as a computer, a mobile phone, a digital camera, a printer, a fax machine, etc.), a wearable device (such as a watch, a bracelet, VR glasses, etc.), a household appliance (such as an air conditioner, a refrigerator, a washing machine, a microwave oven, etc.), etc., which is not particularly limited.

[0120] For example, the vehicle can be an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle, and any vehicle with a battery or a battery pack.

[0121] The vehicle can also include a vehicle body, an axle, and a motor, wherein the battery pack, the axle, and the motor can be arranged on the vehicle body. The battery pack can be electrically connected to the motor, the motor can be connected to the axle, and the battery pack can supply power to the motor, so that the motor can rotate and drive the axle to rotate, thereby enabling the vehicle to travel.

[0122] The vehicle body can include a vehicle chassis and a vehicle body arranged on the chassis, and the vehicle body can have a passenger compartment, in which a driver's seat, a passenger seat, etc. can be arranged, and the driver can sit on the driver's seat to operate the vehicle. For example, the vehicle body can also be provided with a steering wheel, a clutch, a brake, etc. to enable the vehicle to realize complete functions, which is not limited in the present application.

[0123] The embodiment of the present application can realize the accuracy of binding and tracing the whole-process data information from the shell 110 to the battery pack level.

[0124] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent replacements to some or all of the technical features, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A housing assembly (100) characterized by, Comprising: a shell (110) having a first area (1121) on the shell (110); and a two-dimensional code (120) disposed on the first area (1121) of the shell (110); the two-dimensional code (120) comprises: The surface roughness of the first region (1121) is Ra mm, and the area of the code (121) is S mm 2 , and the relationship between Ra mm and S mm 2 satisfies the following equation: a dark code (121); 2. The housing assembly (100) of claim 1, characterized in that Ra mm and S mm 2 satisfy the relationship: 1.8<S / Ra≤90000.

3. The housing assembly (100) of claim 1, wherein, S mm 2 satisfies the relationship: 9≤S≤900。 4. The housing assembly (100) of claim 3, characterized in that S mm 2 satisfies the relationship: 16≤S≤256。 5. The housing assembly (100) of claim 1, wherein, 16<S / Ra≤25600. Ra mm satisfies the relationship:

6. The housing assembly (100) of claim 5, characterized in that 0.01≤Ra≤5. Ra mm satisfies the relationship:

7. The housing assembly (100) of claim 1, wherein, 0.01≤Ra≤1. 0≤D≤5。 8. The housing assembly (100) of claim 7, characterized by D mm, Ra mm, and S mm 2 satisfy the relationship: The two-dimensional code (120) further comprises: at least one bright code (122) disposed at intervals with the dark code (121), the interval distance between the dark code (121) and any one of the bright codes (122) is D mm, D mm satisfies the relationship:

9. The housing assembly (100) of claim 8, characterized by D mm, Ra mm, and S mm 2 satisfy the relationship: 1.8<S / Ra+D≤90005.

10. The housing assembly (100) according to any one of claims 1-9, characterized in that, 16<S / Ra+D≤25605. The dark code (121) comprises a plurality of patterns, the plurality of patterns comprising: 0≤L≤3。 11. The housing assembly (100) of claim 10, characterized by a point pattern (1211) and / or a line pattern (1212); The point pattern (1211) is a non-defective point, the line pattern (1212) is a non-defective line, and the straightness of the line pattern (1212) is L mm, L mm satisfies the relationship:

12. The housing assembly (100) according to any one of claims 1-9, characterized in that Each of the patterns corresponds to a sub-area on the first area (1121), and the absolute value of the roughness difference between any two sub-areas satisfies: 0≤|ΔRa|≤3.

13. A battery, characterized by The shell further has a second area (1122) on the shell, the second area (1122) is provided with a liquid injection hole (130); The surface roughness of the first area (1121) is greater than or less than the roughness around the second area (1122). Comprising:

14. A battery pack, characterized by an electric core and the shell assembly (100) of any one of claims 1-12; the electric core is disposed inside the shell assembly (100), and the shell (110) comprises: a shell body (111) having an open end, and a cover plate (112) covering the open end; 15. An electrical device, characterized by The two-dimensional code (120) is disposed on the cover plate (112). Comprising: The battery of claim 13. Comprising: The battery of claim 13 or the battery pack of claim 14.

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