Battery device

Abstract

The battery device comprises a first battery pack, a second battery pack, a first collection assembly and a second collection assembly, the first battery pack and the second battery pack are arranged in the first direction, the first collection assembly is provided with a first collection face, and the first collection face faces the first battery pack; the first acquisition assembly is provided with a first acquisition surface which is connected to the surface of the electrode output end of the first battery pack, and the second acquisition assembly is provided with a second acquisition surface which faces the second battery pack and is connected to the surface of the electrode output end of the second battery pack; the first acquisition assembly and the second acquisition assembly are connected end to end along a first direction, and one end of the first acquisition assembly away from the second acquisition assembly is provided with an output port; the first acquisition assembly is of a composite layer structure, and the second acquisition assembly is of a single-layer structure. According to the battery device provided by the invention, the material of the wire harness group is saved, the internal structure of the battery device is compact, the acquisition components are convenient to assemble, the production cost is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery package data acquisition, in particular to a battery device. BACKGROUND

[0002] When collecting data of multiple battery packs, each battery pack is usually connected with a signal output end to collect and transmit the data of the multiple battery packs to a management system. Since each battery pack needs to be connected with the output end through a wire harness group, the space utilization, installation time and production cost are increased to some extent. In the existing lithium ion battery products, how to reduce the volume and production cost of the battery products becomes a problem to be solved. CONTENT OF THE INVENTION

[0003] The battery device provided by the present application saves materials, has a compact structure, is easy to install, reduces production cost and improves production efficiency.

[0004] The battery device provided by the embodiment of the present application comprises a first battery pack, a second battery pack, a first acquisition assembly and a second acquisition assembly, wherein the first battery pack and the second battery pack are arranged along a first direction, the first acquisition assembly has a first acquisition surface, the first acquisition surface faces the first battery pack, the first acquisition surface is connected to the surface of the electrode output end of the first battery pack, the second acquisition assembly has a second acquisition surface, the second acquisition surface faces the second battery pack, and the second acquisition surface is connected to the surface of the electrode output end of the second battery pack.

[0005] The first acquisition assembly and the second acquisition assembly are connected head to tail along the first direction, and one end of the first acquisition assembly away from the second acquisition assembly is provided with an output port.

[0006] The first acquisition assembly has a composite layer structure, and the second acquisition assembly has a single layer structure. The first acquisition assembly is used for collecting data of the first battery pack and transmitting the data of the second acquisition assembly to the output port. The second acquisition assembly is used for collecting data of the second battery pack and transmitting the data to the first acquisition assembly.

[0007] In the above embodiment, the first acquisition assembly and the second acquisition assembly are connected to each other for data collection, and the data is output from the output port on the first acquisition assembly. The battery device of the present application has a compact layout, occupies a small space and has high assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 FIG. 1 is a structural schematic view of a battery device provided by an embodiment of the present application;

[0009] Figure 2An assembly view of the first collection component, the second collection component, the connection harness group, the positive electrode output end and the negative electrode output end is provided for an embodiment of the present application.

[0010] Figure 3 A partial enlarged view of the battery device is provided for an embodiment of the present application.

[0011] Reference signs:

[0012] 100 - first battery pack; 200 - second battery pack; 1 - first collection component; 2 - second collection component; A - first direction; B - second direction; C - third direction; 3 - output port; 11 - first harness group; 12 - second harness group; 21 - third harness group; 0 - collection terminal; 121 - first edge; 122 - second edge; 101 - positive electrode output end; 102 - negative electrode output end; 4 - connection harness group; 5 - first plug-in port; 6 - second plug-in port; 7 - reinforcing plate; 8 - avoiding hole; 9 - first output port; 10 - second output port; 111 - third edge; 112 - fourth edge. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical scheme and advantages of the present application clearer, the following further describes the present application with examples in connection with the drawings.

[0014] The terms used in the following examples are only for the purpose of describing specific examples, and are not intended to be limiting on the present application. As used in the specification and the appended claims of the application, the singular forms "a," "an" and "the" are intended to include both the singular and plural forms, unless the context clearly indicates otherwise.

[0015] In the present specification, the reference to "one embodiment" or "a specific embodiment" or the like means that a specific feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. The terms "include", "contain", "have" and their variants mean "including but not limited to", unless otherwise specifically emphasized.

[0016] In some related technologies, new energy vehicles need to go through various complex working conditions during operation, and the use environment of lithium batteries is also changing. In order to ensure that the lithium battery can operate stably and safely, the working mode of the lithium battery is scientifically controlled. Usually, lithium battery data collection covers battery voltage, current, temperature and high interlock data, and transmits the collected data information to the battery management system, and then analyzes the battery working condition.

[0017] A battery pack typically comprises multiple battery modules, each independently configured and equipped with a data acquisition device. These data acquisition devices are connected to signal output terminals via wiring harnesses. This necessitates the inclusion of multiple wiring harnesses within the battery pack. While multiple wiring harnesses increase space utilization within the battery pack, they also raise production costs to some extent.

[0018] To address the aforementioned issues, this application provides a battery device that saves on wiring harness materials, makes the internal structure of the battery device compact, facilitates the assembly of various data acquisition components, reduces production costs, and improves production efficiency.

[0019] Figure 1 A schematic diagram of the structure of a battery device provided for an embodiment of the application, such as... Figure 1 As shown, an embodiment of this application provides a battery device comprising: a first battery pack 100, a second battery pack 200, a first acquisition component 1, and a second acquisition component 2. The first battery pack 100 and the second battery pack 200 are arranged side-by-side along a first direction A. The surface of the first acquisition component 1 facing the first battery pack 100 is a first acquisition surface, and the electrode output terminals of the first battery pack 100 are connected to the first acquisition surface. The surface of the second acquisition component 2 facing the second battery pack 200 is a second acquisition surface, and the electrode output terminals of the second battery pack 200 are connected to the second acquisition surface. The first acquisition component 1 and the second acquisition component 2 are connected end-to-end along the first direction A. An output port 3 is provided at the end of the first acquisition component 1 away from the second acquisition component 2. The first acquisition component 1 has a composite layer structure, and the second acquisition component 2 has a single layer structure. The second acquisition component 2 is used to acquire data from the second battery pack 200 and transmit it to the first acquisition component 1. The first acquisition component 1 is used to acquire data from the first battery pack 100 and transmit the data acquired by the second acquisition component 2 to the output port 3.

[0020] In the above embodiments, the first acquisition component 1 and the second acquisition component 2 are interconnected, and the acquired data can be aggregated and output to the output port 3 on the first acquisition component 1, reducing the number of output ports. The battery device of this application has a compact layout, occupies less space, and has high assembly efficiency.

[0021] Figure 2 An assembly diagram of a first acquisition component, a second acquisition component, a connecting harness group, a positive electrode output terminal, and a negative electrode output terminal, provided for one embodiment of this application, is shown below. Figure 2As shown, in an embodiment, the first collecting assembly 1 includes a first wire harness group 11 and a second wire harness group 12 stacked along the second direction B, and the second collecting assembly 2 includes a third wire harness group 21 connected with the first wire harness group 11. The surface of the electrode output end, the first collecting surface and the second collecting surface are all perpendicular to the second direction B. The first wire harness group 11 and the second wire harness group 12 are combined together to form the first collecting assembly 1, wherein the first wire harness group 11 only serves as a transmission function. The second wire harness group 12 and the third wire harness group 21 can have the same structure and serve as functions of collecting data of the battery pack and transmitting data. The first wire harness group 11, the second wire harness group 12 and the third wire harness group 21 are all in a flat strip structure. The first wire harness group 11 and the second wire harness group 12 stacked together occupy a smaller space, which can reduce the volume of the first collecting assembly 1, thereby reducing the volume of the battery device.

[0022] The second wire harness group 12 and the third wire harness group 21 are both provided with a plurality of collecting terminals 0 for connecting with the electrode output end of the battery pack. Taking the assembly relationship of the first collecting assembly 1 and the first battery pack 100 as an example, specifically, the second wire harness group 12 includes a first edge 121 and a second edge 122 arranged in parallel and extending along the first direction A, and the first edge 121 and the second edge 122 are arranged along the third direction C, and the first direction A, the second direction B and the third direction C are perpendicular to each other. The first edge 121 and the second edge 122 are respectively provided with a plurality of collecting terminals 0. Along the third direction C, the collecting terminals 0 on the first edge 121 and the collecting terminals 0 on the second edge 122 are arranged alternately. The first battery pack 100 includes a plurality of battery packs, each of which has a positive electrode output end 101 and a negative electrode output end 102. Each collecting terminal 0 located on the first edge 121 can be welded with a positive electrode output end 101, and each collecting terminal 0 located on the second edge 122 can be welded with a negative electrode output end, thereby realizing the electrical connection between the first wire harness group 11 and the first battery pack 100 to collect the data of the first battery pack 100. The assembly relationship between the third wire harness group 21 and the second battery pack 200 is the same as that between the second wire harness group 12 and the first battery pack 100, which will not be described herein. The first wire harness group 11 is only used for transmitting data, and therefore is not provided with collecting terminals 0. The first wire harness group 11 can be arranged on the side of the second wire harness group 12 away from the first battery pack 100.

[0023] In an embodiment, the battery device further comprises a connecting harness group 4 for connecting the first collecting assembly 1 and the second collecting assembly 2. The first collecting assembly 1 is provided with a first plug-in port 5 at one end thereof facing the second collecting assembly 2, and the second collecting assembly 2 is provided with a second plug-in port 6 at one end thereof facing the first collecting assembly 1. The first plug-in port 5 is located at a side of the first collecting assembly 1 away from the first collecting surface, and the second plug-in port 6 is located at a side of the second collecting assembly 2 away from the second collecting surface, so as to avoid interference with the battery pack. The two ends of the connecting harness group 4 are plugged into the first plug-in port 5 and the second plug-in port 6, respectively. The connecting harness group 4 is pluggable with the first collecting assembly 1 and the second collecting assembly 2, which is conducive to the integrated assembly of the battery device on site and improves the assembly efficiency.

[0024] In a further embodiment, the first plug-in port 5 is mounted at an end of the first harness group 11, and the second plug-in port 6 is mounted at an end of the third harness group 21. The connecting harness group 4 connects the first harness group 11 and the third harness group 21 to realize the conduction of the lines.

[0025] In an embodiment, the length of the first harness group 11, the length of the second harness group 12, and the length of the third harness group 21 are all greater than the length of the connecting harness group 4. The shorter length of the connecting harness group 4 not only reduces the production cost, but also reduces the occupied space in the battery device, so that the battery device has a smaller volume.

[0026] In an embodiment, the opening of the first plug-in port 5 and the opening of the second plug-in port 6 are oppositely arranged along a first direction A, and the plug-in direction of the connecting harness group 4 is the first direction A, so as to reduce the length of the connecting harness group 4 and avoid stress caused by twisting after the fourth harness group 4 is plugged in. The connecting harness group 4 is located between the first collecting assembly 1 and the second collecting assembly 2, which facilitates assembly.

[0027] In an embodiment, the first harness group 11 can be a flexible harness group, and the second harness group 12 and the third harness group 21 are rigid harness groups. In order to avoid damage to the first harness group 11 due to the force of the connecting harness group 4 during plugging, the first collecting assembly 1 further comprises a reinforcing plate 7, which is arranged on two surfaces of the first harness group 11 away from each other and located between the first harness group 11 and the second harness group 12. The reinforcing plate 7 and the first plug-in port 5 are both rigid structures. The reinforcing plate 7 can provide a certain supporting force to the first plug-in port 5 and improve the stability of the plugging between the harness groups.

[0028] In an embodiment, the first plug-in port 5 can be completely located in the reinforcing plate 7 in the vertical projection of the reinforcing plate 7 along the second direction B. That is, the upper surface of the reinforcing plate 7 is greater than the lower surface of the first plug-in port 5. In this way, the supporting effect of the reinforcing plate 7 on the first plug-in port 5 can be improved.

[0029] In an embodiment, the first wire harness group 11 is shorter than the second wire harness group 12, and the first wire harness group 11 can be stacked in the middle region of the second wire harness group 12. The shorter length of the first wire harness group 11 can reduce the amount of material used and save costs. The output port 3 can include a first output port 9 and a second output port 10. The first output port 9 is connected to the end of the first wire harness group 11, and the second output port is connected to the end of the second wire harness group 12. Along the third direction C, the first output port 9 and the second output port 10 do not overlap, which can avoid the situation that the two output ports interfere with each other when plugging in the cable.

[0030] Figure 3 A partial enlarged view of the battery device provided for an embodiment of the present application is shown in FIG. 6. In an embodiment, the first wire harness group 11 can also be provided with a reinforcing plate 7 on the side away from the first output port 9. The reinforcing plate 7 is located between the first wire harness group 11 and the second wire harness group 12. The reinforcing plate 7 is used to support the first output port 9, avoid damaging the first wire harness group 11 when plugging in the cable, and also improve the stability of plugging. Figure 3

[0031] In an embodiment, the opening of the first output port 9 and the opening of the second output port are away from each other along the third direction C. That is, the openings of the first output port 9 and the second output port 10 can be directed to the outside of the first acquisition assembly 1. In this way, it is convenient to operate when plugging in the cable.

[0032] In an embodiment, the first output port 9 and the second output port 10 can be located at two edges of the first wire harness group 11 and the second wire harness group 12 away from each other. For example, the first output port 9 can be provided on the first edge 121 of the first wire harness group 11. The first wire harness group 11 includes a third edge 111 and a fourth edge 112, and the third edge 111 and the fourth edge 112 are arranged along the third direction C. The first edge 121 is close to the third edge 111, and the second edge 122 is close to the fourth edge 112. The second output port 10 is located on the fourth edge of the second wire harness group 12.

[0033] ​In an embodiment, the first battery pack 100 and the second battery pack 200 each include a plurality of battery packs, each of which has an explosion-proof valve (not shown in the figure) located between the positive electrode output end 101 and the negative electrode output end. The first collecting assembly 1 and the second collecting assembly 2 each have a plurality of avoiding holes 8 for avoiding the explosion-proof valves, and the plurality of avoiding holes 8 are arranged along the first direction A and correspond to the explosion-proof valves of the battery packs one by one. When the first battery pack 100 is assembled with the first collecting assembly 1, the explosion-proof valve can be arranged in the avoiding hole 8, and the positive electrode output end 101 and the negative electrode output end are located on the two sides of the first collecting assembly 1, respectively. The second battery pack 200 and the second collecting assembly 2 are assembled in the same way, and will not be described again. The first plug-in port 5, the second plug-in port 6, the first output port 9 and the second output port 10 along the second direction B do not overlap with the avoiding hole 8, so as to avoid mutual interference.

[0034] The first wire harness group 11, the second wire harness group 12, the third wire harness group 21 and the connecting wire harness group 4 can all be flexible wire harness groups or all be rigid wire harness groups. Alternatively, each of the wire harness groups can be made of flexible or rigid materials according to needs. The flexible wire harness group can be, for example, a flexible printed circuit (FPC), and the rigid wire harness group can be, for example, a PCB.

[0035] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A battery device, characterized in that, The battery data acquisition device comprises: a first battery pack, a second battery pack, a first acquisition assembly and a second acquisition assembly, wherein, the first battery pack and the second battery pack are arranged along a first direction, the first acquisition assembly has a first acquisition surface facing the first battery pack, the first acquisition surface is connected to a surface of an electrode output end of the first battery pack, the second acquisition assembly has a second acquisition surface facing the second battery pack, and the second acquisition surface is connected to a surface of an electrode output end of the second battery pack; the first acquisition assembly and the second acquisition assembly are connected head to tail along the first direction, and an output port is arranged at an end of the first acquisition assembly away from the second acquisition assembly; the first acquisition assembly has a composite layer structure, the second acquisition assembly has a single layer structure, the first acquisition assembly is used for acquiring data of the first battery pack and transmitting data of the second acquisition assembly to the output port, and the second acquisition assembly is used for acquiring data of the second battery pack and transmitting to the first acquisition assembly.

2. The battery device according to claim 1, characterized by a first plug-in port is arranged at an end of the first acquisition assembly facing the second acquisition assembly, the first plug-in port is located on a side of the first acquisition assembly away from the first acquisition surface, a second plug-in port is arranged at an end of the second acquisition assembly facing the first acquisition assembly, the second plug-in port is located on a side of the second acquisition assembly away from the second acquisition surface, and the battery data acquisition device further comprises a connection wire harness group, two ends of the connection wire harness group are respectively plugged into the first plug-in port and the second plug-in port.

3. The battery device of claim 2, wherein, The opening of the first plug-in port and the opening of the second plug-in port are oppositely arranged along the first direction.

4. The battery device of claim 2, wherein The first acquisition assembly comprises a first wire harness group and a second wire harness group arranged in a second direction, the second acquisition assembly comprises a third wire harness group, the first plug-in port is installed at an end of the first wire harness group, the second plug-in port is installed at an end of the third wire harness group, the connection wire harness group connects the third wire harness group and the first wire harness group, the surface of the electrode output end, the first acquisition surface and the second acquisition surface are all perpendicular to the second direction, and the second direction is perpendicular to the first direction.

5. The battery device of claim 4, wherein, The first acquisition assembly further comprises a reinforcing plate, the reinforcing plate and the first plug-in port are arranged on two surfaces of the first wire harness group away from each other, and the reinforcing plate is located between the first wire harness group and the second wire harness group.

6. The battery device of claim 5, wherein, The vertical projection of the first plug-in port on the reinforcing plate is completely located in the reinforcing plate.

7. The battery device of claim 4, wherein The output port comprises a first output port and a second output port, the first output port is installed on the first wire harness group, the second output port is installed on an end of the second wire harness group, the first output port and the second output port do not overlap along a third direction, and the first direction, the second direction and the third direction are all perpendicular to each other.

8. The battery device of claim 7, wherein, The opening of the first output port and the opening of the second output port are away from each other along the third direction.

9. The battery device of claim 8, wherein, The first output port and the second output port are respectively located at two edges of the first collecting assembly which are away from each other along the third direction.

10. The battery device of claim 2, wherein The first battery pack and the second battery pack each include a plurality of battery packs arranged along the first direction, each battery pack having an explosion-proof valve, the first collecting assembly and the second collecting assembly each being provided with a plurality of avoiding holes for avoiding the explosion-proof valve, the plurality of avoiding holes being arranged at intervals along the first direction, the first plug-in port and the second plug-in port each not overlapping with the avoiding holes along a second direction, the second direction being perpendicular to the first collecting surface and the second collecting surface.

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