Battery collecting device

Abstract

According to the battery collection device provided by the invention, the wire harness collection assembly and the circuit board in the battery collection device are in plug-in fit and can be detached, so that the wire harness collection assembly and the circuit board can be transported independently, the phenomenon that the whole transported wire harness collection assembly is damaged is avoided, and the transfer cost can be reduced. Meanwhile, the wire harness collection assembly is in plug-in fit with the circuit board, so that installation is convenient, and certain labor cost can be saved. And the circuit board and the connecting wire harness of the battery management system are fixed in a welding manner, which is simple and reliable.

Description

Technical Field

[0001] This utility model relates to the field of electric energy technology, specifically to a battery data collection device. Background Technology

[0002] With the continuous development of science and technology, battery devices are being used more and more widely, especially in the field of electric vehicles.

[0003] Currently, battery devices include a housing containing at least one row of battery cells. Each battery cell row comprises several cells arranged in a predetermined direction, and multiple battery rows are connected in series and parallel to provide power. The battery device also includes a Flexible Flat Cable (FFC) for collecting operating parameters such as temperature from each battery cell. Typically, one battery cell row corresponds to one FFC. The FFC includes a flexible plate with several parallel wires inside. One end of each wire extends out of the flexible plate for electrical connection to a signal acquisition component. The other ends of all wires are integrated into a common connector at one end of the flexible plate for electrical connection to the battery device's circuit board. Currently, the flexible flat cable is soldered to the circuit board. As the energy density of battery devices increases, the length of a row of battery cells also increases, consequently, the length of the flexible flat cable also increases. Pre-soldering multiple flexible flat cables to the circuit board makes overall transport difficult, easily leading to cable breakage or cracking of the solder joints.

[0004] Therefore, how to solve the problem of FFC transport damage is a technical solution that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a battery collection device that is less likely to damage the FFC during transport.

[0006] This application provides a battery acquisition device, including:

[0007] At least two acquisition units are provided, one of which is used to acquire signals from the cells in a cell group; the acquisition unit includes at least one wire harness acquisition assembly, each of the wire harness acquisition assemblies includes a board body, a sampling part and a plug-in part, the sampling part is used to sample the cells;

[0008] The circuit board is provided with plug terminals that correspond one-to-one with the plug-in parts, and the plug-in parts and plug terminals are plugged in and engaged. The circuit board also has a soldering area for soldering the connection harness that is electrically connected to the battery management system.

[0009] In the embodiment of the present application, the circuit board is provided with a plurality of plug-in ends corresponding to the plug-in parts, and the plug-in ends are in plug-in cooperation with the plug-in parts to realize the transmission of signals collected by the wire harness collection assembly to the circuit board. The wire harness collection assembly and the circuit board are in plug-in cooperation and can be detached. Compared with the prior art that the wire harness collection assembly and the circuit board are welded, the electrical connection end of the wire harness collection assembly and the circuit board in the present application can be detached, so that the two can be transported separately, avoiding the damage of the wire harness collection assembly during overall transportation, and reducing the transportation cost. At the same time, the wire harness collection assembly and the circuit board are in plug-in cooperation, which is convenient to install and can save certain labor cost.

[0010] In the embodiment of the present application, the circuit board also has a welding area for welding a connection wire harness electrically connected with the battery management system. The connection wire harness mainly functions as electrical communication between the circuit board and the battery management system. The connection wire harness can also be a flexible flat cable, a flexible printed circuit board, or other conductive wires. The connection wire harness between the circuit board and the battery management system in the present application is fixed by welding, which is simple and reliable.

[0011] In an example, the plug-in end and the welding area are located on the same side of the circuit board.

[0012] In an example, the plug-in direction of the plug-in part and the plug-in end is perpendicular to the surface of the circuit board.

[0013] In an example, the projection of the plug-in end and the welding area in a first plane is at least partially non-overlapping, and the first plane is a plane perpendicular to the extension direction of the board body.

[0014] In an example, the plug-in end is a plug-in seat fixed on the circuit board, and the plug-in seat is provided with a plug-in port, and the plug-in part is inserted into the plug-in port.

[0015] In an example, the board body includes a first plate part and a second plate part connected together, the sampling part is arranged on the first plate part, the second plate part is bent towards the side where the circuit board is located relative to the first plate part, the plug-in part is arranged on the second plate part, and the distance between the bending position of the first plate part and the second plate part and the plug-in port of the plug-in seat is greater than or equal to 10 mm.

[0016] In an example, the number of wire harness collection assemblies in one collection unit is two, which are a first wire harness collection assembly and a second wire harness collection assembly, and the board body of the first wire harness collection assembly and the board body of the second wire harness collection assembly are at least partially overlapped.

[0017] In an example, the first harness collecting assembly has a length greater than the second harness collecting assembly, the plate body of the second harness collecting assembly is located on a side of the first harness collecting assembly away from the battery cell, the plate body of the second harness collecting assembly and the plate body of the first harness collecting assembly each include a first plate part and a second plate part connected to each other, the second plate part is bent towards the side of the circuit board relative to the first plate part, the second plate part is provided with the plug-in part, and the plug-in part of the second harness collecting assembly and the plug-in part of the first harness collecting assembly are arranged in parallel in a first direction.

[0018] In an example, the first plate part of the first harness collecting assembly further includes a first segment and a second segment connected to each other, the second plate part is connected to a side of the second segment away from the first segment, the first segment is in contact with the plate body of the second harness collecting assembly, and the second segment has a predetermined distance from the plate body of the second harness collecting assembly, the distance being greater than or equal to 10 mm.

[0019] In an example, the first segment and the second segment are connected by an inclined segment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a structural schematic diagram of a battery device according to an example of the present application;

[0021] Figure 2 FIG. 2 is a structural schematic diagram of a battery collecting device according to an example of the present application; Figure 1

[0022] FIG. 3 is a partial enlarged view of a dashed box in the structure shown in FIG. 2; Figure 3 Figure 2 FIG. 4 is a partial enlarged view of a dashed box in the structure shown in FIG. 2;

[0023] Figure 4 FIG. 5 is a partial enlarged view of a dashed box in the structure shown in FIG. 2; Figure 3 FIG. 6 is a partial enlarged view of a dashed box in the structure shown in FIG. 2;

[0024] Figures 1 to 4 FIG. 7 is a one-to-one correspondence between each reference sign and component name in the structure shown in FIG. 2;

[0025] 100 box body; 110 beam body; 200 battery cell group; 201 battery cell; 300 battery collecting device; 30A collecting unit; 310 first harness collecting assembly; 320 second harness collecting assembly; 301 plate body; 302 sampling part; 303 plug-in part; 31 first plate part; 32 second plate part; 330 circuit board; 331 welding area; 332 plate surface; 311 first segment; 312 second segment; 313 inclined segment; 340 connecting harness; 350 plug-in support; 360 bus bar; 400 battery management system. DETAILED DESCRIPTION

[0026] ​​In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0027] The embodiment of the present application provides a technical solution for transporting FFC without easy damage. In order for those skilled in the art to better understand the technical solutions of the embodiment of the present application, the embodiment of the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0028] Please refer to Figures 1 to 4 , Figure 1 for a structural schematic diagram of a battery device in an embodiment provided by the present application; Figure 2 for Figure 1 a structural schematic diagram of a battery collection device in an embodiment provided by the present application; Figure 3 for Figure 2 an enlarged view of the dashed box in the structure shown in the figure; Figure 4 for Figure 3 a partial enlarged view of A in the structure shown in the figure.

[0029] As shown in Figure 1 , the embodiment of the present application provides a battery device, which comprises a box body 100, a battery cell 201, a bus bar 360 and a battery collection device 300. The number of the battery cell 201 is several, each battery cell 201 is located inside the box body 100, the battery cell 201 is stacked along the x direction to form a column of battery cell groups 200, and the number of the battery cell 201 in the column of battery cell groups 200 is determined according to the specific product. The box body 100 can have a column of battery cell groups 200 inside, and of course can also have at least two columns of battery cell groups 200 arranged along the y direction. One battery cell 201 has a positive pole and a negative pole, and the poles of all battery cells 201 can be connected in series or / and in parallel according to the rules through the bus bar 360 to form a whole. The battery cell groups 200 inside the box body 100 are also connected in series or / and in parallel through the bus bar to form a whole to form an external power supply. The materials of the positive pole and the negative pole of the battery cell 201 can use single-component materials, such as copper materials, aluminum materials and other materials with good conductivity, or can use composite materials composed of different components, such as composite materials formed by copper and aluminum materials with good conductivity, as long as they can achieve good conductivity.

[0030] The bus bar in the embodiment of the present application can use metals with good conductivity, such as aluminum or copper.

[0031] The battery cell 201 can be a primary battery or a secondary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery. The type of the battery cell 201 is not limited to the description in the present application. The battery cell 201 can be a cuboid, a flat body, a cylinder or other shapes.

[0032] In the embodiment of the present application, the battery acquisition device 300 comprises at least one acquisition unit 30A and a circuit board 330. One acquisition unit 30A is used for acquiring signals of the battery cell 201 in one battery cell group 200. In the figure, the battery acquisition device 300 comprises three acquisition units 30A, which are used for acquiring working signals of the battery cells 201 in three rows of battery cell groups 200. The working signals include but are not limited to temperature signals and pressure signals. Of course, the acquisition units 30A in the battery acquisition device 300 correspond to the battery cell groups 200 one by one, and the number of the acquisition units 30A is not limited to four as described herein, but can be determined according to the specific number of the battery cell groups 200. Two or more acquisition units 30A can be arranged along a direction perpendicular to the arrangement direction of the battery cells 201.

[0033] In the embodiment of the present application, the circuit board 330 is usually located at one end of the battery box along the arrangement direction of the battery cells 201. The circuit board 330 can be mounted on the beam body 110 or the wall of the box body 100 inside the battery box by a fixing member.

[0034] In the embodiment of the present application, each acquisition unit 30A comprises at least one wire harness acquisition assembly, which has a sampling part 302, a board body 301 and a plug-in part 303. The sampling part 302 is mainly used for acquiring working state signals such as temperature signals and pressure signals of the battery cell 201. The board body 301 has a conductive line inside, which is used for transmitting the temperature signals or pressure signals acquired by the sampling part 302 to the circuit board 330. The circuit board 330 processes the signals transmitted by the wire harness acquisition assembly, so that the user can know the working state of the battery cell 201. The sampling part 302 can be electrically connected with the pole of the battery cell 201 or other components.

[0035] The wire harness acquisition assembly in the embodiment of the present application can be a flexible circuit board, for example, the flexible circuit board can be a flexible flat cable (FFC), that is, the flexible circuit board is a structure in which a flat copper foil is sandwiched between two layers of insulating foil films. Of course, the flexible circuit board can also be a flexible printed circuit board 330 (FPC), which is a flexible printed circuit obtained by chemical etching. Of course, the flexible circuit board can also have other structures, as long as it can play a role in data transmission. The flexible circuit board is usually flat to reduce the space occupation.

[0036] In the embodiment of the present application, the circuit board 330 is provided with a plug-in end corresponding to the plug-in part 303. The plug-in end is plugged into the plug-in part 303 to realize the transmission of the signals collected by the wire harness collection assembly to the circuit board 330. The wire harness collection assembly and the circuit board 330 are plugged together and can be detached. Compared with the prior art that the wire harness collection assembly and the circuit board 330 are welded together, the electrical connection end of the wire harness collection assembly and the circuit board 330 in the present application can be detached, so that they can be transported separately, avoiding the damage of the wire harness collection assembly during the overall transportation, and reducing the transportation cost. At the same time, the wire harness collection assembly and the circuit board 330 are plugged together, which is convenient to install and can save certain labor cost.

[0037] In the embodiment of the present application, the circuit board 330 also has a welding area 331 for welding a connection wire harness 340 electrically connected to the battery management system 400. The connection wire harness 340 mainly functions as the electrical communication between the circuit board 330 and the battery management system 400. The connection wire harness 340 can also be a flexible flat cable, a flexible printed circuit board 330, or other conductive wires. The connection wire harness 340 of the circuit board 330 and the battery management system 400 is fixed by welding, which is simple and reliable.

[0038] The main function of the battery management system 400 is to intelligently manage and maintain each battery cell 201, monitor the state of the battery device, and prevent the battery device from being overcharged or over-discharged. The specific structure of the battery management system 400 can refer to the prior art, which will not be described in detail herein.

[0039] In the embodiment of the present application, the plug-in end and the welding area 331 can be located on the same side of the circuit board 330. In the figure, they are arranged on the upper surface of the circuit board 330, which can facilitate their installation and improve the efficiency of plugging and welding. The plug-in end and the welding area 331 located on the same side of the circuit board 330 can also minimize the overall space occupied by the battery collection device 300 and improve the space utilization, providing as much space as possible for the installation of other components.

[0040] In a specific example, the plug-in direction of the plug-in part 303 and the plug-in end can be perpendicular to the board surface 332 of the circuit board 330. For example, the side of the circuit board 330 is parallel to the arrangement direction of the battery cell 201. The socket of the plug-in end is perpendicular to the side of the circuit board 330 and upward. The plug-in part 303 is vertically inserted into the socket of the plug-in end.

[0041] In this embodiment, the plug-in direction of the plug-in part 303 is perpendicular to the board surface of the circuit board 330, avoiding the movement of the circuit board 330 driven by the force generated during the plugging process, and improving the positional accuracy of the welding area 331.

[0042] In the embodiment of the present application, the projection of the plug-in end and the welding area 331 in the first plane is at least partially non-overlapping, the first plane is a plane perpendicular to the extension direction of the plate body 301, and the extension direction of the plate body 301 is parallel to the arrangement direction of the battery cell 201. In other words, the plug-in end and the welding area 331 are arranged staggered in the arrangement direction of the battery cell 201, so that the welding of the wire harness 340 and the plug-in of the wire harness collecting assembly are relatively staggered in space, and the mutual influence is small, and the plug-in and the wire harness welding do not affect each other.

[0043] In the embodiment of the present application, the plug-in end is a plug-in support 350 fixed on the circuit board 330, and the plug-in support 350 is provided with a plug-in port, and the plug-in part 303 is inserted into the plug-in port. The plug-in part 303 can realize the electrical connection between the wire harness collecting assembly and the circuit board 330 by inserting into the plug-in port of the plug-in support 350, which is convenient for plug-in cooperation.

[0044] In the embodiment of the present application, the plate body 301 includes a first plate part 31 and a second plate part 32 connected together, the sampling part 302 is arranged on the first plate part 31, the first plate part 31 is substantially parallel to the arrangement direction of the battery cell 201, and during installation, the first plate part 31 is located at the top of the battery cell 201. The second plate part 32 is bent towards the side where the circuit board 330 is located relative to the first plate part 31, the plug-in part 303 is arranged on the second plate part 32, and the distance between the bending positions of the first plate part 31 and the second plate part 32 and the plug-in port of the plug-in support 350 is greater than or equal to 10 mm.

[0045] In the embodiment of the present application, the number of wire harness collecting assemblies in the battery collecting device 300 is two, which are the first wire harness collecting assembly 310 and the second wire harness collecting assembly 320, the length of the first wire harness collecting assembly 310 is greater than that of the second wire harness collecting assembly 320, and the plate bodies 301 of the two wire harness collecting assemblies are stacked.

[0046] In the embodiment of the present application, the plate bodies 301 of the wire harness collecting assemblies in the same collecting unit 30A are at least partially stacked, so that two or more wire harness collecting assemblies can be used to collect signals from all battery cells 201 in the same battery cell group 200, the width of the wire harness collecting assembly is relatively small, the space occupied in the direction perpendicular to the arrangement direction of the battery cell 201 is reduced, interference between the wire harness collecting assembly and other components in the battery device is avoided, the wire harness collecting assembly does not block the explosion-proof valve on the battery cell 201, and the safety of the battery is improved. Similarly, a plurality of relatively independent plug-in parts 303 are plug-in matched with the circuit board 330, and the plug-in end on the circuit board 330 is arranged flexibly. In summary, the energy density of the battery device is improved, and the safety of the battery device and the convenience of installation with the circuit board 330 are considered.

[0047] In the battery collecting device 300, the length of the first wire harness collecting assembly 310 is greater than that of the second wire harness collecting assembly 320, the plate body 301 of the second wire harness collecting assembly 320 is located on the side of the first wire harness collecting assembly 310 away from the battery cell 201, and the longer first wire harness collecting assembly 310 is located below the shorter second wire harness collecting assembly 320, so that the curling of the wire harness collecting assembly can be reduced.

[0048] The plate body 301 of the second wire harness collecting assembly 320 and the plate body 301 of the first wire harness collecting assembly 310 each include a first plate portion 31 and a second plate portion 32 connected to each other, the second plate portion 32 is bent toward the side of the circuit board 330 relative to the first plate portion 31, the second plate portion 32 is provided with a plug-in portion 303, and the plug-in portion 303 of the second wire harness collecting assembly 320 and the plug-in portion 303 of the first wire harness collecting assembly 310 are arranged in parallel at intervals in the first direction. In this way, the plug-in of the wire harness collecting assembly and the circuit board 330 is facilitated, and the plug-in space is saved.

[0049] In the present application, the first plate portion 31 of the first wire harness collecting assembly 310 of the battery collecting device 300 further includes a first segment 311 and a second segment 312 connected to each other, the second plate portion 32 is connected to the side of the second segment 312 away from the first segment 311, the first segment 311 is in contact with the plate body 301 of the second wire harness collecting assembly 320, and the second segment 312 has a predetermined distance from the plate body 301 of the second wire harness collecting assembly 320, which is greater than or equal to 10 mm. There can also be a distance between the second plate portion 32 of the first wire harness collecting assembly 310 and the second plate portion 32 of the second wire harness collecting assembly 320.

[0050] In this embodiment, the second segment 312 has a distance from the second wire harness collecting assembly 320, which can provide assembly space for the bending position of the second plate portion 32, and can also avoid interference between the plug-in portions 303 of the two wire harness collecting assemblies.

[0051] In the present application, the first segment 311 and the second segment 312 can be connected by an inclined segment 313, and the first plate portion 31 is bent twice through the inclined segment 313. When the distance of the two bends is too long, the space occupied by the battery device is too large, and when the distance of the two bends is too small, the wire harness collecting assembly is prone to breakage. In order to reduce the above-mentioned phenomena as much as possible, the length of the inclined segment 313 can be reasonably set along the extension direction of the first plate portion 31, so as to meet the requirements of small space occupation and high reliability of the wire harness collecting assembly as much as possible.

[0052] Other structures of the battery device can refer to the prior art, which will not be described herein.

[0053] The term "several" as used herein refers to an indefinite number of more than one, typically two or more; and when used to indicate the number of several components, it does not indicate a relationship between the number of the components.

[0054] In the description of the present application, it should be explained that in the embodiments of the present application, the terms "first", "second" and the like are only used for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features.

[0055] In the description of the embodiments of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, "connection" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. Among them, "fixed connection" means that the relative positional relationship after connection is unchanged.

[0056] The orientation terms mentioned in the embodiments of the present application, such as "inner", "outer" and the like, are only the direction of the reference drawings, therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application. In addition, unless otherwise specified in the present application, "several" in the present application means two or more.

[0057] In the description of the embodiments of the present application, the terms "including", "containing" or any other variants thereof are intended to cover non-exclusive containing, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including a…" does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0058] In the embodiments of the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0059] The above merely preferred embodiments of the present application, it should be noted that for those of ordinary skill in the art, without departing from the principles of the present application, can make several improvements and refinements, these improvements and refinements should also be considered as the scope of protection of the present application.

Claims

1. A battery data collection device, characterized in that, include: At least two acquisition units are provided, one of which is used to acquire signals from the cells in a cell group; the acquisition unit includes at least one wire harness acquisition assembly, each of the wire harness acquisition assemblies includes a board body, a sampling part and a plug-in part, the sampling part is used to sample the cell; The circuit board is provided with plug terminals that correspond one-to-one with the plug-in parts, and the plug-in parts and plug terminals are plugged in and engaged. The circuit board also has a soldering area for soldering the connection harness that is electrically connected to the battery management system.

2. The battery acquisition device as described in claim 1, characterized in that, The plug-in terminal and the soldering area are located on the same side of the circuit board.

3. The battery acquisition device as described in claim 1, characterized in that, The insertion direction of the plug-in portion and the plug-in end is perpendicular to the surface of the circuit board.

4. The battery acquisition device as described in claim 2, characterized in that, The projections of the plug-in end and the welding area in a first plane do not overlap at least partially, and the first plane is a plane perpendicular to the extension direction of the plate body.

5. The battery acquisition device as described in claim 3, characterized in that, The plug-in end is a plug-in support fixed on the circuit board, and the plug-in support is provided with a plug interface, and the plug-in part is inserted into the plug interface.

6. The battery acquisition device as described in claim 5, characterized in that, The board body includes a first board portion and a second board portion connected together. The sampling portion is disposed on the first board portion. The second board portion is bent relative to the first board portion toward the side where the circuit board is located. The plug-in portion is disposed on the second board portion. The distance between the bending position of the first board portion and the second board portion and the plug interface of the plug-in support is greater than or equal to 10mm.

7. The battery acquisition device according to any one of claims 1 to 6, characterized in that, The number of wire harness acquisition components in one acquisition unit is two, namely a first wire harness acquisition component and a second wire harness acquisition component, wherein the board body of the first wire harness acquisition component and the board body of the second wire harness acquisition component are at least partially stacked.

8. The battery acquisition device as described in claim 7, characterized in that, The length of the first wire harness acquisition component is greater than that of the second wire harness acquisition component. The main body of the second wire harness acquisition component is located on the side of the first wire harness acquisition component away from the battery cell. Both the main body of the second wire harness acquisition component and the main body of the first wire harness acquisition component include a connected first plate portion and a second plate portion. The second plate portion is bent relative to the first plate portion toward the circuit board. The second plate portion is provided with the plug portion. The plug portion of the second wire harness acquisition component and the plug portion of the first wire harness acquisition component are arranged side by side at a distance in a first direction.

9. The battery acquisition device as described in claim 8, characterized in that, The first plate portion of the first wire harness acquisition component further includes a first segment and a second segment connected together. The second plate portion is connected to the side of the second segment away from the first segment. The first segment is in contact with the plate body of the second wire harness acquisition component. The second segment and the plate body of the second wire harness acquisition component have a predetermined distance, which is greater than or equal to 10 mm.

10. The battery acquisition device as described in claim 9, characterized in that, The first segment and the second segment are connected by an inclined segment.

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