Sampling wire harness, battery cell, battery cell group, battery device and power utilization device

Abstract

The utility model discloses a sampling wire harness, electrical core, electrical core group, battery device and power utilization device, the sampling wire harness comprises a wire harness body, the two ends of the wire harness body in the length direction are respectively a sampling plugging end and a sampling collection end, the sampling collection end comprises a plurality of sampling collection end parts, and the sampling collection end parts are connected with the sampling plugging end and the sampling collection end parts. And the plurality of sampling and collecting end parts are suitable for being electrically connected with a plurality of battery cell layers of the battery cell respectively. According to the sampling wire harness disclosed by the utility model, data acquisition can be carried out on each battery cell layer of the battery cell, and the acquisition accuracy is improved, so that the use condition of the battery cell can be better checked.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a sampling harness, a battery cell, a battery cell group, a battery device and an electric device. Background Art

[0002] In order to achieve real-time monitoring and protection of voltage and temperature during the use or charging and discharging process of the battery pack, voltage sampling segments are set at the positions where the battery pack needs to be detected, and connected through FPC sampling lines. This method requires the FPC to be molded and cut into a certain shape to match each detection point, and then installed and welded. In the related art, the FPC sampling line is used to sample each battery cell in the battery pack, and the sampling accuracy is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a sampling harness that can collect data on each layer of a battery cell, thereby improving the accuracy of the collection and facilitating a better viewing of the usage of the battery cell.

[0004] The second objective of the utility model is to provide a battery cell using the above-mentioned sampling harness.

[0005] The third objective of the present utility model is to provide a battery cell assembly using the above-mentioned battery cell.

[0006] The fourth objective of the present invention is to provide a battery device using the above-mentioned battery cell or the above-mentioned battery cell group.

[0007] The fifth object of the present utility model is to provide an electrical device using the above-mentioned battery cell, battery cell group or battery device.

[0008] According to the sampling harness of the first aspect of the present invention, the sampling harness comprises a harness body, wherein the two ends of the harness body in the length direction are respectively a sampling connector end and a sampling collection end, wherein the sampling collection end comprises a plurality of sampling collection ends, and the plurality of sampling collection ends are suitable for being electrically connected to a plurality of battery core layers of a battery core respectively.

[0009] According to the sampling harness of the utility model, each layer of the battery cell can be sampled, thereby improving the sampling accuracy, and thus making it easier to check the usage of the battery cell. In addition, through the joint action of the sampling connector and the sampling collection end, it is beneficial to transmit the collected signal of the battery cell layer, thereby improving the performance of the sampling harness.

[0010] According to some embodiments of the present utility model, the plurality of sampling and collecting ends are divided into a plurality of sampling and collecting groups, each of the sampling and collecting groups comprising a first sampling and collecting end and a second sampling and collecting end, the first sampling and collecting end of the one of the plurality of sampling and collecting groups farthest from the sampling plug end is suitable for being electrically connected to the topmost positive electrode collector of the plurality of battery core layers, the second sampling and collecting end of the one of the plurality of sampling and collecting groups closest to the sampling plug end is suitable for being electrically connected to the bottommost negative electrode collector of the plurality of battery core layers, and the first sampling and collecting end and the second sampling and collecting end located between the first sampling and collecting end of the one farthest from the sampling plug end and the second sampling and collecting end of the one closest to the sampling plug end are respectively suitable for being electrically connected to the positive electrode collector and the negative electrode collector of two adjacent battery core layers at the same time.

[0011] According to some embodiments of the present invention, the first sampling and collecting end portion and the second sampling and collecting end portion extend along two sides perpendicular to the length direction of the wiring harness body respectively.

[0012] According to some embodiments of the present invention, the first sampling and collecting end portion and the second sampling and collecting end portion are staggered along the length direction of the wiring harness body.

[0013] According to some embodiments of the present invention, the first sampling and collecting ends of the multiple sampling and collecting groups are located on the same side of the wiring harness body perpendicular to the length direction of the wiring harness body, and the first sampling and collecting ends of the multiple sampling and collecting groups are spaced apart along the length direction of the wiring harness body; the second sampling and collecting ends of the multiple sampling and collecting groups are located on the other side of the wiring harness body perpendicular to the length direction of the wiring harness body, and the second sampling and collecting ends of the multiple sampling and collecting groups are spaced apart along the length direction of the wiring harness body.

[0014] According to some embodiments of the present invention, along the length direction of the wire harness body, the second sampling and collecting end portion is located between two adjacent first sampling and collecting ends of the plurality of sampling and collecting groups.

[0015] According to some embodiments of the present invention, along the direction toward the sampling connector, the distance between the free ends of the plurality of first sampling and collecting ends and the center line in the length direction of the sampling bundle gradually decreases; and / or the distance between the free ends of the plurality of second sampling and collecting ends and the center line in the length direction of the sampling bundle gradually decreases.

[0016] According to some embodiments of the utility model, the wiring harness body includes: a wire body, the two ends of the wire body in the length direction are respectively the sampling connector end and the sampling collection end; an insulating film, the insulating film is wrapped outside the wire body, at least a portion of the sampling connector end and at least a portion of the sampling collection end are respectively exposed outside the insulating film.

[0017] According to some embodiments of the present invention, along the direction toward the sampling connector, the length of the insulating film covering the plurality of first sampling and collecting ends gradually decreases; and / or the length of the insulating film covering the plurality of second sampling and collecting ends gradually decreases.

[0018] According to some embodiments of the present invention, the insulating film includes: two insulating film layers, and the two insulating film layers are respectively located on both sides of the wire body.

[0019] According to some embodiments of the utility model, there are multiple wire bodies, and the multiple wire bodies are arranged side by side and spaced apart, one end of the multiple wire bodies constitutes the sampling plug end, and the other end of the multiple wire bodies is the multiple sampling collection end portions.

[0020] According to some embodiments of the present invention, the wire body is a copper wire, and the insulating film is a PI film.

[0021] The battery cell according to the second aspect of the present invention comprises: a battery cell body; a sampling harness, wherein the sampling harness is the sampling harness according to the first aspect of the present invention, and the multiple sampling and collecting ends of the sampling harness are electrically connected to the multiple battery layers of the battery cell body respectively.

[0022] According to some embodiments of the present invention, the plurality of sampling and collecting ends are electrically connected to the side surfaces of the plurality of battery core layers respectively.

[0023] According to some embodiments of the present invention, the plurality of sampling and collecting ends are welded to the plurality of battery core layers respectively.

[0024] According to some embodiments of the present invention, the battery cell body includes a pole ear, which is electrically connected to the outermost edge of the battery cell layer along the thickness direction of the battery cell layer among the plurality of battery cell layers, and the sampling harness is spaced apart from the pole ear.

[0025] According to some embodiments of the present utility model, the battery cell further comprises: a packaging film, the packaging film is coated on the periphery of the battery cell body, and an insulating member is provided between the packaging film, the sampling wire harness and the pole lug.

[0026] The battery cell group according to the third aspect of the present invention comprises: a plurality of battery cells, wherein the battery cells are the battery cells according to the second aspect of the present invention, and the sampling connector ends of the sampling harnesses of the plurality of battery cells are connected.

[0027] According to some embodiments of the present utility model, the battery cell further comprises: a lead wire, and the plurality of sampling connectors of the plurality of sampling wire bundles of the plurality of battery cells are connected to the lead wire.

[0028] According to some embodiments of the present invention, the lead wire and the sampling harness of the plurality of battery cells are an integrated piece.

[0029] The battery device according to the fourth aspect of the present invention comprises the battery cell according to the second aspect of the present invention, or the battery cell group according to the third aspect of the present invention.

[0030] The electrical device according to the fifth aspect of the utility model comprises the battery cell according to the second aspect of the utility model, or the battery cell group according to the third aspect of the utility model, or the battery device according to the fourth aspect of the utility model.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] Figure 1 is a schematic diagram of a sampling harness according to an embodiment of the utility model;

[0034] Figure 2 is a schematic diagram of a battery cell according to an embodiment of the utility model, wherein the packaging film is not shown;

[0035] Figure 3 yes Figure 2 The enlarged view of the A part shown in the middle circle;

[0036] Figure 4 is a schematic diagram of a battery cell according to an embodiment of the utility model;

[0037] Figure 5 is a cross-sectional view of a battery cell according to an embodiment of the utility model;

[0038] Figure 6 It is a schematic diagram of a battery cell group according to an embodiment of the utility model.

[0039] Reference numerals:

[0040] 100. Sampling harness;

[0041] 1. Wire harness body; 11. Sampling connector; 12. Sampling collection end; 121. Sampling collection end;

[0042] 1211, sampling and collecting group; 1211a, first sampling and collecting end; 1211b, second sampling and collecting end;

[0043] 13. Line body; 14. Insulating film; 141. Insulating film layer;

[0044] 200, battery cell;

[0045] 201, battery cell body; 2011, battery cell layer; 2011a, positive electrode current collector;

[0046] 2011b, positive electrode active material layer; 2011c, electrolyte; 2011d, negative electrode active material layer;

[0047] 2011e, negative electrode current collector; 2012, sealant; 2013, tab;

[0048] 202, packaging film; 203, insulating member;

[0049] 300, battery cell group;

[0050] 301, lead wire; 3011, connector. DETAILED DESCRIPTION

[0051] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 3 The sampling harness 100 according to the first aspect of the embodiment of the utility model is described. The sampling harness 100 can be applied to the battery cell 200, and the present application takes the application to the battery cell 200 as an example for detailed description.

[0052] like Figure 1 , Figure 2 and Figure 3 As shown, the sampling harness 100 according to the first embodiment of the utility model includes a harness body 1 .

[0053] Specifically, the length direction of the wire harness body 1 (for example Figure 1 The two ends of the battery 200 (in the vertical direction shown in FIG. 1 ) are respectively a sampling plug end 11 and a sampling collection end 12, and the sampling collection end 12 includes a plurality of sampling collection ends 121, and the plurality of sampling collection ends 121 are suitable for being electrically connected to a plurality of battery layers 2011 of the battery 200. In the description of the present utility model, the meaning of "plurality" is two or more.

[0054] For example, in Figure 1 , Figure 2 and Figure 3 In the example, the sampling collection end 12 is located at the upper end of the harness body 1, and the sampling plug end 11 is located at the lower end of the harness body 1. Thus, information can be collected for each cell layer 2011 of the battery cell 200 through multiple sampling collection ends 121, thereby improving the accuracy of sampling so as to better view the usage of the battery cell 200. In addition, after the sampling collection end 121 collects the information, the information can flow along the harness body 1 to the sampling plug end 11 so as to transmit the information and process the information. It should be noted that the sampling harness 100 can be an FPC (Flexible Printed Circuit) harness. But not limited to this. The battery cell 200 is formed by stacking multiple cell layers 2011 along the thickness direction (i.e., the up and down direction) of the cell layer 2011. Among them, each cell layer 2011 contains a corresponding positive electrode and a negative electrode respectively.

[0055] According to the sampling harness 100 of the utility model, each cell layer 2011 of the cell 200 can be sampled, thereby improving the sampling accuracy, and further facilitating better viewing of the usage of the cell 200. In addition, through the joint action of the sampling connector 11 and the sampling collection end 12, it is beneficial to transmit the collected signal of the cell layer 2011, thereby improving the performance of the sampling harness 100.

[0056] According to some embodiments of the present invention, referring to Figure 1 , Figure 2 and Figure 3 The plurality of sampling and collecting ends 121 are divided into a plurality of sampling and collecting groups 1211 , and each sampling and collecting group 1211 includes a first sampling and collecting end 1211 a and a second sampling and collecting end 1211 b . The first sampling and collecting end 1211a of the one farthest from the sampling plug terminal 11 among the multiple sampling and collecting groups 1211 is suitable for being electrically connected to the topmost positive electrode current collector 2011a of the multiple battery core layers 2011, and the second sampling and collecting end 1211b of the one closest to the sampling plug terminal 11 among the multiple sampling and collecting groups 1211 is suitable for being electrically connected to the bottommost negative electrode current collector 2011e of the multiple battery core layers 2011, and the first sampling and collecting end 1211a and the second sampling and collecting end 1211b located between the first sampling and collecting end 1211a farthest from the sampling plug terminal 11 and the second sampling and collecting end 1211b closest to the sampling plug terminal 11 are respectively suitable for being electrically connected to the positive electrode current collector 2011a and the negative electrode current collector 2011e of two adjacent battery core layers 2011 at the same time.

[0057] For example, in Figure 1 , Figure 2 and Figure 3In the example, the top first sampling and collecting end 1211a is electrically connected to the positive electrode current collector 2011a of the topmost cell layer 2011 of the cell 200, and the bottom second sampling and collecting end 1211b is electrically connected to the negative electrode current collector 2011e of the bottommost cell layer 2011 of the cell 200. The first sampling and collecting end 1211a between the top first sampling and collecting end 1211a and the bottom second sampling and collecting end 1211b is electrically connected to the negative electrode collective and the positive electrode current collector 2011a of two adjacent cell layers 2011 at the same time. The second sampling and collecting end 1211b between the top first sampling and collecting end 1211a and the bottom second sampling and collecting end 1211b is electrically connected to the negative electrode collective 2011d and the positive electrode current collector 2011a of two adjacent cell layers 2011 at the same time. For example, the top first sampling and collecting end 1211a and the second sampling and collecting end 1211b are used together to collect information of the top battery cell layer 2011, and the top second sampling and collecting end 1211b and the first sampling and collecting end 1211a adjacent thereto are used together to collect information of the battery cell layers adjacent to the top battery cell layer 2011, and so on from top to bottom. The information collection logic of other battery cell layers 1211 is similar to the above.

[0058] With such a configuration, the first sampling and collecting end 1211a and the second sampling and collecting end 1211b are arranged reasonably, and through a plurality of sampling and collecting groups 1211, it is effectively ensured that each cell layer 2011 of the cell 200 can be collected, thereby effectively ensuring the integrity of the collected data of the cell 200, so as to better view the usage of the cell 200. In addition, the cell layer 2011 of the cell 200 is relatively thin, and through the configuration of the sampling and collecting group 1211, it is convenient for the first sampling and collecting end 1211a and the second sampling and collecting end 1211b to be connected to the cell layer 2011, thereby helping to improve the installation efficiency of the sampling harness 100 and the cell 200.

[0059] Further, refer to Figure 1 The first sampling and collecting end 1211a and the second sampling and collecting end 1211b extend along two sides perpendicular to the length direction of the wire harness body 1. Figure 1In the example, the first sampling and collecting end 1211a extends to the right in a direction perpendicular to the length direction of the harness body 1, that is, the first sampling and collecting end 1211a extends from left to right. The second sampling and collecting end 1211b extends to the left in a direction perpendicular to the length direction of the harness body 1, that is, the second sampling and collecting end 1211b extends from right to left. In this way, the first sampling and collecting end 1211a and the second sampling and collecting end 1211b extend in different directions, thereby avoiding the first sampling and collecting end 1211a and the second sampling and collecting end 1211b from contacting and short-circuiting, thereby facilitating the normal use of the sampling harness 100 for a long time. In addition, it is also convenient to distinguish the first sampling and collecting end 1211a and the second sampling and collecting end 1211b, so that it is easy to select the first sampling and collecting end 1211a and the second sampling and collecting end 1211b during the installation process, thereby facilitating the installation of the sampling and collecting group 1211 and the battery layer 2011.

[0060] According to some embodiments of the present invention, referring to Figure 1 The first sampling and collecting end 1211a and the second sampling and collecting end 1211b are staggered along the length direction (ie, the up-down direction) of the wire harness body 1. Figure 1 In the example, a plurality of first sampling and collecting ends 12 and a plurality of second sampling and collecting ends 12 are arranged alternately from left to right in the vertical direction, and two adjacent first sampling and collecting ends 1211a and second sampling and collecting ends 1211b are not on the same plane in the left-right direction. In this way, the distance between the first sampling and collecting end 1211a and the adjacent second sampling and collecting end 1211b is increased, thereby further avoiding the contact between the two adjacent first sampling and collecting ends 1211a and the second sampling and collecting end 1211b, thereby effectively ensuring that the sampling harness 100 can be used normally for a long time. In addition, the first sampling and collecting end 1211a and the second sampling and collecting end 1211b have simple structures and are easy to produce, thereby improving the production efficiency of the sampling harness 100. It should be noted that the spacing between the first sampling and collecting end 1211a and the adjacent second sampling and collecting end 1211b can be set according to the actual situation of the battery cell 200 to better meet the actual application.

[0061] According to some embodiments of the present invention, referring to Figure 1 The first sampling and collecting ends 1211a of the plurality of sampling and collecting groups 1211 are located on the same side of the harness body 1 perpendicular to the length direction (i.e., the up-down direction) of the harness body 1, and the first sampling and collecting ends 1211a of the plurality of sampling and collecting groups 1211 are arranged at intervals along the length direction (i.e., the up-down direction) of the harness body 1. For example, Figure 1In the example, the first sampling and collecting ends 1211a of the plurality of sampling and collecting groups 1211 are all located on the right side of the harness body 1, and the plurality of first sampling and collecting ends 1211a are spaced apart in the up-down direction. Thus, the contact between the two adjacent first sampling and collecting ends 1211a is avoided, thereby avoiding the short circuit between the two adjacent first sampling and collecting ends 1211a, reducing the signal interference of different first sampling and collecting ends 1211a, thereby extending the service life of the sampling harness 100, improving the accuracy of the signal transmission of the sampling harness 100, and improving the performance of the sampling harness 100. In addition, it is also beneficial to connect the plurality of first sampling and collecting ends 1211a with the corresponding battery layer 2011, thereby improving the installation efficiency of the sampling harness 100. It should be noted that the interval between the two adjacent first sampling and collecting ends 1211a in the plurality of sampling and collecting groups 1211 can be equidistant or unequal, and can be specifically set according to the actual situation of the battery 200.

[0062] Combination Figure 1 The second sampling and collecting ends 1211b of the plurality of sampling and collecting groups 1211 are located on the other side of the harness body 1 perpendicular to the length direction (i.e., the up-down direction) of the harness body 1, and the second sampling and collecting ends 1211b of the plurality of sampling and collecting groups 1211 are arranged at intervals along the length direction (i.e., the up-down direction) of the harness body 1. For example, Figure 1 In the example, the second sampling and collecting ends 1211b of the plurality of sampling and collecting groups 1211 are all located on the left side of the harness body 1, and the plurality of sampling and collecting ends 121 are spaced apart from each other in a direction from top to bottom. Thus, the contact between two adjacent second sampling and collecting ends 1211b is avoided, thereby avoiding a short circuit between two adjacent second sampling and collecting ends 1211b, reducing the signal interference of different second sampling and collecting ends 1211b, thereby extending the service life of the sampling harness 100, improving the accuracy of signal transmission of the sampling harness 100, and improving the performance of the sampling harness 100. In addition, it is also beneficial to connect the plurality of second sampling and collecting ends 1211b to the corresponding battery layer 2011, respectively, thereby improving the installation efficiency of the sampling harness 100. It should be noted that the interval between two adjacent second sampling and collecting ends 1211b in the plurality of sampling and collecting groups 1211 can be equidistant or unequal, and can be specifically set according to the actual situation of the battery 200.

[0063] According to some embodiments of the present invention, referring to Figure 1 , along the length direction (ie, the up-down direction) of the wire harness body 1, the second sampling and collecting end portion 1211b is located between two adjacent first sampling and collecting end portions 1211a of the plurality of sampling and collecting groups 1211. Figure 1In the example, there is a second sampling and collecting end 1211b on the left side between two adjacent first sampling and collecting ends 1211a, and there is a first sampling and collecting end 1211a on the right side between two adjacent second sampling and collecting ends 1211b. As a result, the first sampling and collecting ends 1211a and the second sampling and collecting ends 1211b are arranged neatly, thereby improving the aesthetics of the sampling harness 100. In addition, it also avoids the contact between the first sampling and collecting end 1211a and the second sampling and collecting end 1211b on each battery layer 2011, thereby facilitating the sampling harness 100 to normally collect information on each battery layer 2011. In addition, it also facilitates the connection between the first sampling and collecting ends 1211a and the second sampling and collecting ends 1211b of the plurality of sampling and collecting groups 1211 and the battery layer 2011, thereby improving the assembly efficiency of the sampling and collecting groups 1211 and the battery 200.

[0064] According to some embodiments of the present invention, referring to Figure 1 , along the direction toward the sampling plug end 11, the distance between the free ends of the plurality of first sampling collection ends 1211a and the center line of the sampling harness 100 in the length direction (i.e., the up-down direction) gradually decreases. And / or, the distance between the free ends of the plurality of second sampling collection ends 1211b and the center line of the sampling harness 100 in the length direction (i.e., the up-down direction) gradually decreases. For example, the arrangement of the plurality of first sampling collection ends 1211a and the plurality of second sampling collection ends 1211b includes the following situations: First, along the direction toward the sampling plug end 11, only the distance between the free ends of the plurality of first sampling collection ends 1211a and the center line of the sampling harness 100 in the length direction gradually decreases. Second, along the direction toward the sampling plug end 11, only the distance between the free ends of the plurality of second sampling collection ends 1211b and the center line of the sampling harness 100 in the length direction gradually decreases. Third, along the direction toward the sampling plug end 11, the distance between the free ends of the plurality of first sampling collection ends 1211a and the center line of the sampling harness 100 in the length direction gradually decreases. At the same time, the distance between the free ends of the plurality of second sampling and collecting ends 1211b and the center line in the length direction of the sampling line bundle 100 gradually decreases (eg Figure 1 shown).

[0065] For example, in Figure 1 In the example, the line connecting the right ends of the multiple first sampling and collecting ends 1211a is inclined from top to bottom toward the above-mentioned center line, and the line connecting the left ends of the multiple second sampling and collecting ends 1211b is inclined from top to bottom toward the above-mentioned center line, and the arrangement of the right ends of the multiple first sampling and collecting ends 1211a and the left ends of the multiple second sampling and collecting ends 1211b is roughly "V" shaped.

[0066] With such a configuration, the right ends of two adjacent first sampling and collecting ends 1211a can be staggered, and the left ends of two adjacent second sampling and collecting ends 1211b can be staggered, so as to facilitate the connection between the first sampling and collecting end 1211a and the battery layer 2011, and also facilitate the connection between the second sampling and collecting end 1211b and the battery layer 2011, and further facilitate the connection between the sampling and collecting group 1211 and the battery layer 2011, thereby improving the installation efficiency of the battery 200. In addition, it also avoids the wrong connection of the right ends of the two adjacent first sampling and collecting ends 1211a during the installation process, and also avoids the wrong connection of the left ends of the two adjacent second sampling and collecting ends 1211b during the installation process, so that the sampling harness 100 can be used normally for a long time.

[0067] According to some embodiments of the present invention, referring to Figure 1 The wire harness body 1 includes a wire body 13 and an insulating film 14 .

[0068] Specifically, the two ends of the wire body 13 in the length direction (i.e., the up-down direction) are respectively the sampling plug end 11 and the sampling collection end 12, the insulating film 14 is wrapped around the wire body 13, and at least a portion of the sampling plug end 11 and at least a portion of the sampling collection end 12 are respectively exposed outside the insulating film 14. Figure 1 In the example, the upper end of the wire body 13 is the sampling collection end 12, the lower end of the wire body 13 is the sampling plug end 11, a part of the upper end of the sampling collection end 12 is exposed outside the insulating film 14, and a part of the lower end of the sampling plug end 11 is exposed outside the insulating film 14. Therefore, by setting the insulating film 14, the remaining part of the wire body 13 (for example, the part between the sampling plug end 11 and the sampling collection end 12 in the wire body 13) is prevented from contacting the contact cell 200, preventing accidental contact, thereby avoiding mutual influence when the sampling harness 100 samples each layer of the cell layer 2011, thereby facilitating improving the accuracy of the sampling harness 100 in sampling each layer of the cell layer 2011. In addition, it is also convenient to electrically connect the exposed sampling connector 11 and the sampling collection terminal 12 to other components (for example, the sampling collection terminal 12 is electrically connected to the battery layer 2011), thereby effectively ensuring that the sampling harness 100 can normally collect information of the battery cell 200, thereby improving the performance of the sampling harness 100.

[0069] Further, refer to Figure 1, along the direction toward the sampling connector 11, the length of the insulating film 14 covering the multiple first sampling collection ends 1211a gradually decreases. And / or, the length of the insulating film 14 covering the multiple second sampling collection ends 1211b gradually decreases. For example, the setting of the insulating film 14 includes the following situations: First, the length of the insulating film 14 covering the multiple first sampling collection ends 1211a gradually decreases. Second, the length of the insulating film 14 covering the multiple second sampling collection ends 1211b gradually decreases. Third, the length of the insulating film 14 covering the multiple first sampling collection ends 1211a gradually decreases. At the same time, the length of the insulating film 14 covering the multiple second sampling collection ends 1211b gradually decreases (such as Figure 1 shown).

[0070] For example, in Figure 1 In the example, the right side of the insulating film 14 covering the plurality of first sampling and collecting ends 1211a is tilted toward the direction of the above-mentioned center line, and the tilt direction of the above-mentioned right side of the insulating film 14 is substantially the same as the tilt direction of the right end of the plurality of first sampling and collecting ends 1211a, and the left side of the insulating film 14 covering the plurality of second sampling and collecting ends 1211b is tilted toward the direction of the above-mentioned center line, and the tilt direction of the above-mentioned left side of the insulating film 14 is substantially the same as the tilt direction of the left end of the plurality of second sampling and collecting ends 1211b, and the shape of the insulating film 14 covering the sampling and collecting group 1211 is substantially "V"-shaped. Such a configuration effectively ensures that at least a portion of the plurality of first sampling and collecting ends 1211a leaks to the outside, and also effectively ensures that at least a portion of the plurality of second sampling and collecting ends 1211b leaks to the outside, thereby facilitating the normal electrical connection of the plurality of sampling and collecting groups 1211 and the battery layer 2011, thereby ensuring that the sampling harness 100 can be used normally for a long time.

[0071] According to some embodiments of the present invention, referring to Figure 3 The insulating film 14 includes two insulating film layers 141, and the two insulating film layers 141 are respectively located on both sides of the line body 13. Figure 3 In the example, the two insulating film layers 141 are respectively located on the front side and the rear side of the wire body 13, that is, the two insulating film layers 141 are respectively located on both sides of the thickness direction of the wire body 13. In this way, the insulating film 14 has a simple structure and is easy to wrap the wire body 13, which helps to improve the production efficiency of the wire harness body 1 and reduce the production cost of the wire harness body 1.

[0072] According to some embodiments of the present invention, referring to Figure 1 There are multiple wire bodies 13, and the multiple wire bodies 13 are arranged side by side and spaced apart. One end of the multiple wire bodies 13 constitutes a sampling plug end 11, and the other end of the multiple wire bodies 13 is a plurality of sampling collection ends 121. For example, in Figure 1In the example, multiple wire bodies 13 are arranged at intervals along the left-right direction, and the multiple wire bodies 13 are separated by an insulating film 14. The upper ends of the multiple wire bodies 13 are sampling plug ends 11, and the lower ends of the multiple wire bodies 13 are sampling collection ends 121. In this way, the multiple wire bodies 13 are arranged in the same side plane, so that the multiple wire bodies 13 are electrically connected to the same side of the battery cell 200, and the flatness of the electrical connection between the multiple wire bodies 13 and the battery cell 200 is improved, which helps to improve the effect of the electrical connection between the multiple wire bodies 13 and the battery cell 200, and improves the use stability of the sampling harness 100.

[0073] According to some embodiments of the utility model, the wire body 13 is a copper wire, and the insulating film 14 is a PI film. The copper wire has good conductivity and plasticity, thereby improving the conductive performance of the wire body 13, and also making the wire body 13 easy to shape, thereby improving the use performance of the sampling wire harness 100, and also improving the production efficiency of the wire body 13. The PI film has good insulation, thereby improving the insulation effect of the insulating film 14, thereby avoiding the short circuit of the sampling wire harness 100, and improving the use performance of the sampling wire harness 100.

[0074] According to the battery cell 200 of the second embodiment of the utility model, refer to Figure 2 and Figure 3 , including a battery body 201 and a sampling harness 100, wherein the sampling harness 100 is the sampling harness 100 according to the first embodiment of the utility model, and the plurality of sampling collection ends 121 of the sampling harness 100 are electrically connected to the plurality of battery layers 2011 of the battery body 201. For example, in Figure 2 and Figure 3 In the example, each sampling and collecting end 121 is electrically connected to each corresponding battery layer 2011. Thus, the sampling harness 100 can collect information of the battery cell 200, thereby facilitating the collection of information of the battery cell 200 so as to view relevant information of the battery cell 200.

[0075] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the plurality of sampling and collecting ends 121 are electrically connected to the sides of the plurality of battery core layers 2011 respectively. Figure 2 and Figure 3In the example, multiple battery cell layers 2011 are arranged in sequence from top to bottom, and the rear side of each sampling and collecting end 121 is electrically connected to the front side of each corresponding battery cell layer 2011. Such a configuration effectively ensures that each sampling and collecting end 121 can be electrically connected to each battery cell layer 2011, and also facilitates the electrical connection between each sampling and collecting end 121 and each battery cell layer 2011, thereby improving the performance of the battery cell 200 and improving the installation efficiency of the battery cell 200. In addition, the sampling and collecting end 121 is connected to the side of the battery cell layer 2011, which is conducive to the connection operation. At the same time, the layout of the sampling harness 100 and the battery cell 200 is more reasonable, which is conducive to the assembly of the battery cell 200.

[0076] According to some embodiments of the present invention, multiple sampling and collecting ends 121 are respectively welded to multiple battery core layers 2011. As a result, welding is easy to operate, thereby reducing the difficulty of connecting the sampling and collecting ends 121 and the battery core layers 2011, thereby improving the assembly efficiency of the sampling and collecting ends 121 and the battery core layers 2011. In addition, the connection strength between the sampling and collecting ends 121 and the battery core layers 2011 is also improved, thereby improving the use stability of the battery core 200.

[0077] According to some embodiments of the present invention, referring to Figure 2 The cell body 201 includes a tab 2013, and the tab 2013 is connected to a plurality of cell layers 2011 along the thickness direction of the cell layers 2011 (eg Figure 2 The outermost edge of the core layer 2011 (in the vertical direction shown in FIG. 1 ) is electrically connected, and the sampling harness 100 is spaced apart from the tab 2013. For example, Figure 2In the example, two tabs 2013 are provided (for example, a positive tab and a negative tab), one end of the two tabs 2013 is respectively located at the upper and lower sides of the battery body 1, and the other ends of the two tabs 2013 are respectively located at the front and rear sides of the battery body 201 after being bent, and the front tab 2013 and the sampling harness 100 are arranged at intervals along the left and right directions. Multiple battery layers 2011 are arranged in series, one of the two tabs 2013 is electrically connected to the battery layer 2011 at the uppermost edge of the multiple battery layers 2011 along the thickness direction of the battery layer 2011, and the other of the two tabs 2013 is electrically connected to the battery layer 2011 at the lowermost edge of the multiple battery layers 2011 along the thickness direction of the battery layer 2011. With such a configuration, the current on the multiple cell layers 2011 of the cell body 201 can be led out through the tabs 2013, so that the cell 200 can be used normally for a long time. In addition, with such a configuration, interference between high and low voltage currents caused by the sampling harness 100 and the tabs 2013 being too close or in contact with each other is avoided, thereby facilitating the normal use of the cell 200 during sampling. Moreover, contact between the sampling harness 100 and the tabs 2013 is also avoided, thereby avoiding a short circuit in the cell 200 during use, thereby facilitating the normal use of the cell 200 for a long time.

[0078] According to some embodiments of the present invention, referring to Figure 4 The battery cell 200 further includes a packaging film 202, which is coated on the outer periphery of the battery cell body 201, and an insulating member 203 is provided between the packaging film 202, the sampling harness 100 and the tab 2013. Figure 4 In the example, the insulating member 203 wraps the sampling harness 100 and the tab 2013 to separate the sampling harness 100 and the tab 2013 from the packaging film 202. As a result, the packaging film 202 can protect the battery body 201, thereby preventing the battery body 201 from being damaged, which is beneficial to extending the service life of the battery 200. In addition, the packaging film 202 is insulated from the sampling harness 100 and the tab 2013 by the insulating member 203, thereby preventing the packaging film 202 from being electrically connected to the sampling harness 100 and the tab 2013 and causing a short circuit, so that the battery 200 can be used normally for a long time. Moreover, the insulating member 203 can achieve a sealing effect on the interior of the battery 200, thereby preventing the electrolyte of the battery 200 from leaking out, so that the battery 200 can be used normally.

[0079] Optionally, refer to Figure 5Each battery layer 2011 includes a positive electrode current collector 2011a, a positive electrode active material layer 2011b, an electrolyte 2011c, a negative electrode active material layer 2011d, and a negative electrode current collector 2011e. The positive electrode current collector 2011a, the positive electrode active material layer 2011b, the electrolyte 2011c, the negative electrode active material layer 2011d, and the negative electrode current collector 2011e are arranged in sequence from top to bottom. The outer peripheral edge of the upper side of the battery layer 2011 and the outer peripheral side of the battery layer 2011 are both provided with a sealant 2012. During the installation of the battery cell 200, the sampling and collecting end 121 is first connected to the battery layer 2011, and then the sealant 2012 is applied. In this way, the sealant 2012 can seal the battery layer 2011, thereby preventing the battery layer 2011 from leaking and flowing to the surrounding battery layers 2011, thereby preventing the battery 200 from short-circuiting, and helping the battery 200 to be used normally for a long time. It should be noted that the positive electrode current collector 2011a can be an aluminum foil, and the negative electrode current collector 2011e can be a copper foil.

[0080] According to the battery pack 300 of the third aspect of the present utility model, refer to Figure 6 , comprising a plurality of battery cells 200, wherein the battery cells 200 are the battery cells 200 according to the second embodiment of the utility model, and the sampling connectors 11 of the sampling harness 100 of the plurality of battery cells 200 are connected. For example, in Figure 6 In the example, the multiple cells 200 are arranged at intervals along one side from top to bottom. This arrangement facilitates data collection of the multiple cells 200, thereby helping to reduce the amount of materials used for the multiple sampling harnesses 100.

[0081] According to some embodiments of the present invention, referring to Figure 6 The battery cell 200 further includes a lead 301, and the plurality of sampling connectors 11 of the plurality of sampling harnesses 100 of the plurality of battery cells 200 are connected to the lead 301. Figure 6 In the example, the multiple sampling connectors 11 of the sampling harness 100 of each battery cell 200 are connected to the lead 301, and then connected to other components through the connector 3011 of the lead 301. In this way, data can be collected from multiple battery cells 200 through the lead 301, thereby reducing the amount of materials used in the sampling process, thereby reducing the production cost of the battery assembly 300. Moreover, the space occupied by multiple sampling harnesses 100 is also reduced. It should be noted that each sampling harness 100 converges to the connector 3011 along the lead 301, and then connects to the external plug (not shown) for data collection. Multiple sampling harnesses 100 transmit signals through the lead 301, but each sampling harness 100 is conducted through different wires in the lead 301, and the signals between multiple sampling harnesses 100 will not interfere with each other.

[0082] According to some embodiments of the present invention, referring to Figure 6 The lead wire 301 and the sampling harness 100 of the plurality of battery cells 200 are integrated into one piece. Thus, the connection strength between the lead wire 301 and the sampling harness 100 of the plurality of battery cells 200 is improved, thereby improving the use stability of the battery cell group 300.

[0083] The battery device (not shown) according to the fourth embodiment of the utility model comprises the battery cell 200 according to the second embodiment of the utility model, or the battery cell group 300 according to the third embodiment of the utility model.

[0084] According to the battery device of the present invention, by adopting the upper battery cell 200 or the battery cell group 300, it is convenient to collect information of the battery device, and it is also beneficial for the battery device to be used normally for a long time.

[0085] The electrical device (not shown) according to the fifth aspect of the utility model comprises the battery cell 200 according to the second aspect of the utility model, or the battery cell group 300 according to the third aspect of the utility model, or the battery device according to the fourth aspect of the utility model.

[0086] According to the electric device of the utility model, the use performance of the electric device is improved by using the battery cell 200, battery cell group 300 or battery device. It should be noted that the electric device can be a vehicle, an aircraft, a ship, a computer or an energy storage cabinet.

[0087] Other structures and operations of the battery cell 200, the battery cell group 300, the battery device and the power-consuming device according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0088] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "top", "bottom", "axial", "radial", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation on the present invention.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0090] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sampling harness, characterized in that: include: A wiring harness body, wherein the two ends of the wiring harness body in the length direction are respectively a sampling connector and a sampling collection end, the sampling collection end includes a plurality of sampling collection ends, the plurality of sampling collection ends are suitable for being electrically connected to a plurality of battery core layers of a battery core, the plurality of sampling collection ends are divided into a plurality of sampling collection groups, each of the sampling collection groups includes a first sampling collection end and a second sampling collection end, the first sampling collection end and the second sampling collection end located between the first sampling collection end which is farthest from the sampling connector and the second sampling collection end which is closest to the sampling connector are respectively suitable for being electrically connected to the positive electrode current collector and the negative electrode current collector of two adjacent battery core layers at the same time.

2. The sampling harness according to claim 1, characterized in that: The first sampling and collecting end of one of the multiple sampling and collecting groups that is farthest from the sampling connector is suitable for being electrically connected to the topmost positive electrode collector of the multiple battery core layers, and the second sampling and collecting end of one of the multiple sampling and collecting groups that is closest to the sampling connector is suitable for being electrically connected to the bottommost negative electrode collector of the multiple battery core layers.

3. The sampling harness according to claim 2, characterized in that: The first sampling and collecting end portion and the second sampling and collecting end portion extend along two sides perpendicular to the length direction of the wire harness body respectively.

4. The sampling harness according to claim 2 or 3, characterized in that: The first sampling and collecting end portion and the second sampling and collecting end portion are staggered along the length direction of the wire harness body.

5. The sampling harness according to claim 2 or 4, characterized in that: The first sampling and collecting ends of the plurality of sampling and collecting groups are located on the same side of the wire harness body perpendicular to the length direction of the wire harness body, and the first sampling and collecting ends of the plurality of sampling and collecting groups are arranged at intervals along the length direction of the wire harness body; The second sampling and collecting ends of the plurality of sampling and collecting groups are located on the other side of the wire harness body perpendicular to the length direction of the wire harness body, and the second sampling and collecting ends of the plurality of sampling and collecting groups are spaced apart along the length direction of the wire harness body.

6. The sampling harness according to claim 5, characterized in that: Along the length direction of the wire harness body, the second sampling and collecting end portion is located between two adjacent first sampling and collecting end portions of the plurality of sampling and collecting groups.

7. The sampling harness according to claim 5, characterized in that: In the direction toward the sampling plug end, The distances between the free ends of the plurality of first sampling and collecting ends and the center line of the sampling line bundle in the length direction gradually decrease; and / or The distances between the free ends of the plurality of second sampling and collecting end portions and the center line of the sampling line bundle in the length direction gradually decrease.

8. The sampling harness according to any one of claims 2 to 7, characterized in that: The wiring harness body comprises: A wire body, wherein two ends of the wire body in the length direction are respectively the sampling plug end and the sampling collection end; An insulating film is coated outside the wire body, and at least a portion of the sampling plug end and at least a portion of the sampling collection end are respectively exposed outside the insulating film.

9. The sampling harness according to claim 8, characterized in that: In the direction toward the sampling plug end, The length of the insulating film covering the first sampling and collecting ends gradually decreases; and / or The length of the insulating film covering the plurality of second sampling and collecting end portions gradually decreases.

10. The sampling harness according to claim 8, characterized in that: The insulating film comprises: Two insulating film layers, the two insulating film layers are respectively located on two sides of the wire body.

11. The sampling harness according to claim 8, characterized in that: There are multiple wire bodies, which are arranged side by side and spaced apart. One end of the multiple wire bodies constitutes the sampling plug end, and the other end of the multiple wire bodies constitutes the multiple sampling collection end portions.

12. The sampling harness according to claim 8, characterized in that: The wire body is a copper wire, and the insulating film is a PI film.

13. A battery cell, characterized in that: include: Battery cell body; A sampling harness, wherein the sampling harness is the sampling harness according to any one of claims 1 to 12, wherein a plurality of sampling and collecting ends of the sampling harness are electrically connected to a plurality of battery core layers of the battery core body, respectively.

14. The battery cell according to claim 13, characterized in that: The plurality of sampling and collecting ends are electrically connected to the side surfaces of the plurality of battery core layers respectively.

15. The battery cell according to claim 13, characterized in that: The plurality of sampling and collecting ends are welded to the plurality of battery core layers respectively.

16. The battery cell according to any one of claims 13 to 15, characterized in that: The battery cell body comprises a tab, the tab is electrically connected to the outermost edge of the battery cell layer along the thickness direction of the battery cell layers among the plurality of battery cell layers, and the sampling wire bundle is spaced apart from the tab.

17. The battery cell according to claim 16, characterized in that: Further including: A packaging film is coated on the outer periphery of the battery body, and an insulating member is provided between the packaging film, the sampling wire harness and the tab.

18. A battery cell group, characterized in that: include: A plurality of battery cells, wherein the battery cells are the battery cells according to any one of claims 13 to 17, and the sampling connectors of the sampling harnesses of the plurality of battery cells are connected.

19. The battery cell assembly according to claim 18, characterized in that: Further including: A lead wire is provided, and a plurality of sampling connectors of a plurality of sampling wire harnesses of a plurality of the battery cells are connected to the lead wire.

20. The battery cell assembly according to claim 19, characterized in that: The lead wire and the sampling harness of the plurality of battery cells are an integrated piece.

21. A battery device, characterized in that: It comprises a battery cell according to any one of claims 13-17, or a battery cell group according to any one of claims 18-20.

22. An electrical device, characterized in that: The method comprises a battery cell according to any one of claims 13 to 17, a battery cell group according to any one of claims 18 to 20, or a battery device according to claim 21.

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