Metro vehicle storage battery box device based on drag chain type structure
By adopting a cable chain-type battery box, the problems of poor contact and cumbersome maintenance caused by disconnecting connectors were solved, enabling continuous cable connection, simplifying the maintenance process, and reducing costs.
Patent Information
- Application Number
- CN202511538025.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-01-23
AI Technical Summary
Existing pull-out battery boxes rely on disconnect connectors, which leads to poor contact, insulation aging, and cumbersome maintenance, as well as high manufacturing costs.
The cable chain structure enables continuous cable connection without interruption through cable chain components, eliminating the need for plugging and unplugging, simplifying the maintenance process, and reducing costs by using standardized cable chain components.
It improves the power supply reliability of the battery box, simplifies the maintenance process, and reduces the workload of operators and manufacturing costs.
Smart Images
Figure CN121394751A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of rail vehicles, and relates to a metro vehicle battery box, in particular to a metro vehicle battery box device based on a tow chain structure. BACKGROUND
[0002] Urban rail transit has become the first choice for the public to travel due to its fast speed and large passenger capacity. The battery box is an important part of the urban rail transit vehicle and provides power for the vehicle in emergency situations.
[0003] The current mainstream battery box generally adopts a pull-out type inner box design. During daily maintenance or maintenance work of the battery, the inner box assembled with the battery needs to be pulled out of the box body along the guide rail. In order to adapt to the pulling action of the battery inner box, the cable connected to the positive and negative poles of the battery in the prior art needs to be reserved with a certain length of movement to realize follow-up, but due to the limitation of the structure design, the disconnection of the cable usually needs to be realized through a disconnecting connector, that is, the inner box side cable and the box side cable are separated by plugging in and out through the connector, and after the disconnecting connector is disconnected, the inner box can be pulled out, and after the maintenance is completed, it is recombined (as shown in Figure 4 , in order to clearly show the structure of the disconnecting connector, Figure 4 , the parts hidden in the middle).
[0004] The above existing battery box has the following problems: (1) the disconnecting connector is prone to connection failure problems such as poor contact and insulation aging after long-term repeated plugging and unplugging operation; (2) the disconnecting connector needs plugging steps, and the disassembly and assembly process of the electrical components during maintenance is complicated, resulting in high work intensity of the operator; (3) the disconnecting connector needs customized parts such as plugs, sockets, installation modules and special connection terminals, resulting in high overall manufacturing cost. SUMMARY
[0005] In view of the core pain points caused by the existing pull-out type battery box relying on the disconnecting connector, the purpose of the present application is to provide a metro vehicle battery box device based on a tow chain structure. The present application solves the problem that the disconnecting connector is prone to connection failure problems such as poor contact and insulation aging after long-term repeated plugging and unplugging operation, and improves the power supply reliability of the battery box; the plugging step of the disconnecting connector is cancelled, the battery inner box is directly pulled out, the disassembly and assembly process of the electrical components during maintenance is reduced, and the work intensity of the operator is reduced; the customized parts such as plugs, sockets, installation modules and special connection terminals required by the disconnecting connector are abandoned, and standardized tow chain components are adopted, the production and assembly process is simplified, and the overall manufacturing cost is reduced.
[0006] In order to achieve the above-mentioned or other purposes, the technical solutions of the present application are as follows: A kind of metro vehicle battery box device based on tow chain structure, including battery outer box, battery inner box and tow chain assembly;Battery outer box is built-in battery inner box and both ends of battery outer box can pull out a battery inner box;Tow chain assembly is placed between battery inner box and battery outer box, one end of tow chain assembly is fixed with the inner side of battery outer box, the other end of tow chain assembly is fixed with the outer side of battery inner box;Tow chain assembly includes the end mounting plate of both ends and a plurality of chain links located in the middle, chain link is hollow inside, and is communicated with each other to form internal passage between chain link and with end mounting plate;The positive and negative electrode connection cable of battery inner box is inserted into the internal passage and extends to the outer side of battery outer box along the direction of tow chain assembly, to realize the continuous connection of cable without breaking.
[0007] Further, the length of the tow chain assembly is designed according to the principle that there is no stretching margin for the cable when the battery inner box is completely pulled out, and the length should meet the maximum pulling stroke of the battery inner box.
[0008] Further, the bending radius of the tow chain assembly is greater than the minimum bending radius of the cable.
[0009] Further, a safety gap is reserved between the inner wall of the battery outer box and the tow chain assembly within the reciprocating motion trajectory of the tow chain assembly.
[0010] Further, a bracket is fixed to the outer side of the battery inner box, an installation plate is fixed to the inner side of the battery outer box, one end of the tow chain assembly is connected to the bracket through bolts, and the other end of the tow chain assembly is connected to the installation plate through bolts.
[0011] Further, mounting holes are reserved on the end mounting plate, and the bracket and the installation plate are connected through bolts, respectively.
[0012] Further, a pair of suspension arms are arranged at the left and right ends of the battery outer box, the suspension arms are in a foldable form, and the suspension arms are a support structure of the battery inner box and also a track for pulling the battery inner box out of the battery outer box;A roller corresponding to the track is arranged on the outer side of the battery inner box.
[0013] Further, each of the suspension arms includes a support body and a foldable body, the support body and the foldable body are connected through a hinge, the support body is fixed to the inner side of the battery outer box, and the foldable body is arranged at the end of the battery outer box.
[0014] Further, the tow chain assembly is located above the suspension arms.
[0015] The present application has the following advantages: (1) Improved safety performance The existing battery box disconnecting connector structure has limited plug-in and plug-out life, and repeated plug-in and plug-out may cause connection failure. When the drag chain structure is adopted, the cable is fixedly connected at both ends, and there is no disconnecting in the middle, which effectively avoids the risk of connector connection failure. At the same time, the drag chain also protects the cable and avoids the risk of wear and tear between the cable and the box during the dragging of the battery inner box.
[0016] (II) Maintenance performance improvement The existing battery box disconnecting connector structure requires an operator to complete 7 procedures of "power off - pull out the connector - pull out the inner box - maintenance - push the inner box - plug in the connector - power on detection", which takes about 45 minutes each time. The plug-in and plug-out steps are cancelled in the present application, and the maintenance procedure is simplified to 5 procedures of "power off - pull out the inner box - maintenance - push the inner box - power on detection", which takes less than 20 minutes each time, greatly improving the efficiency of daily maintenance and repair.
[0017] (III) Cost reduction The existing battery box disconnecting connector structure requires a plug, a socket, and installation modules and connection terminals, and needs to be made by professional personnel, which has high procurement and labor costs (especially the disconnecting connector is very expensive). The drag chain assembly in the present application is a mature industrial product (relatively cheap), which is directly purchased and installed. The cable only needs to pass through the drag chain and be simply installed, and the steps such as disconnecting connector crimping and installation are omitted. Compared with the existing technology, the manufacturing cost of the subway vehicle battery box device based on the drag chain structure can be further reduced, and the cost can be greatly saved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a schematic diagram of the battery box device (the inner box is pulled out) of the present application; Figure 2 is a schematic diagram of the battery box device (the inner box is pushed back) of the present application; Figure 3 is a schematic diagram of the drag chain assembly; Figure 4 is a schematic diagram of the disconnecting connector mentioned in the background art; Figure 5 is a position schematic diagram of the terminal row on the inner side of the battery outer box; Wherein, 1 - battery inner box, 2 - battery outer box, 3 - drag chain assembly, 4 - bracket, 5 - mounting plate, 6 - end mounting plate, 7 - chain link, 8 - terminal row; A - disconnecting connector. DETAILED DESCRIPTION
[0019] The present application will be further described in detail below in combination with the drawings and examples.
[0020] Referring toFigures 1 to 2 As shown, the subway vehicle battery box device based on the drag chain structure in this embodiment optimizes the layout design on the basis of the pull-out battery box (the battery outer box 2 houses the battery inner box 1, and the battery inner box 1 can be pulled out from the end of the battery outer box 1) (preferably, the layout design is optimized on the basis of the standardized battery box in this embodiment), and adds a drag chain assembly 3, which includes the battery outer box 2, the battery inner box 1 and the drag chain assembly 3.
[0021] Among them, such as Figure 1 and Figure 2 As shown, two inner battery cases 1 are installed inside the outer battery case 2 using a pull-out design. Figure 1 Both the left and right ends can be pulled out to reveal two battery compartments (1).
[0022] Specifically: A pair of suspension arms are provided at both ends of the outer battery casing 2. These suspension arms are designed to bend, and when the inner battery casing 1 is pulled out, the suspension arms serve as a support structure for the inner battery casing 1 and also as a track for pulling the inner battery casing 1 out of the outer battery casing 2. The battery is installed inside the inner battery casing 1.
[0023] Each suspension arm includes a support body and a bendable body. The support body is connected to the bendable body via a hinge. The support body is fixed inside the battery casing 2, and the bendable body is located at the end of the battery casing 2. Figure 1 When the inner battery case 1 is pulled out of the outer battery case 2, the bendable body opens and is aligned with the support body, forming a track for pulling out the inner battery case 1. Rollers corresponding to and matching the track are provided on the outside of the inner battery case 1. Figure 2 After the inner battery box 1 is pushed back into the outer battery box 2, the flexible body can be folded to form a "hugging arm" state, which plays a certain role in closing and locking the inner battery box 1.
[0024] The cable chain assembly 3 is positioned outside the inner battery casing 1 and inside the outer battery casing 2, meaning it is located between the inner battery casing 1 and the outer battery casing 2. The bracket 4 is part of the inner battery casing 1 and is fixed to the outside of the inner battery casing 2. The mounting plate 5 is part of the outer battery casing 2 and is fixed to the inside of the outer battery casing 2. One end of the cable chain assembly 3 is connected to the bracket 4 by bolts, and the other end of the cable chain assembly 3 is connected to the mounting plate 5 by bolts.
[0025] The drag chain assembly 3 in this embodiment consists of 4 parts, such as... Figure 1 As shown.
[0026] In this embodiment, the cable chain assembly 3 is located above the suspension arm.
[0027] like Figure 3As shown, the drag chain assembly 3 includes end mounting plates 6 at both ends and a plurality of interconnected chain links 7 in the middle.
[0028] The chain links 7 are hollow inside, and the chain links 7 and the end mounting plates 6 are interconnected to form an internal passage; the number of chain links 7 is increased or decreased according to the specific cable length during use.
[0029] The end mounting plates 6 are provided with mounting holes, and are connected to the movable end bracket (i.e. the bracket 4) and the fixed end bracket (i.e. the mounting plate 5) through mounting bolts.
[0030] The positive and negative electrode cables of the battery in the box 2 are drawn out from the battery terminal post, and are then inserted into the internal passage of the drag chain assembly 3, and are extended along the drag chain assembly 3 to the pre-set terminal block 8 inside the battery out of the box 1, and are then extended to the outside of the battery out of the box 1 through the terminal block 8, so as to realize continuous connection of the cables without disconnection. Figure 5
[0031] Preferably, the entire length of the drag chain assembly 3 is designed according to the principle that there is no stretching margin of the cables when the battery in the box 1 is completely pulled out, and the specific length should meet the maximum pulling stroke of the battery in the box 1.
[0032] Preferably, the bending radius of the drag chain assembly 3 is greater than the minimum bending radius of the cables, so as to ensure that the cables are not excessively bent when the drag chain assembly 3 reciprocates. Preferably, a sufficient safety gap is reserved between the inner wall of the battery out of the box 2 and the drag chain assembly 3 within the reciprocating track of the drag chain assembly 3, so as to avoid interference between the drag chain assembly 3 and other parts of the box during movement.
[0033] The above embodiments are only used to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made on the basis of the technical solutions according to the technical idea of the present application falls within the protection scope of the present application; and the technologies not involved in the present application can be realized by using the existing technologies.
Claims
1. A battery box device for a metro vehicle based on a tow chain structure, characterized by: The battery box device comprises a battery outer box, a battery inner box and a drag chain assembly; the battery outer box houses the battery inner box and both ends of the battery outer box can pull out a battery inner box; the drag chain assembly is arranged between the battery inner box and the battery outer box, one end of the drag chain assembly is fixed to the inner side of the battery outer box, and the other end of the drag chain assembly is fixed to the outer side of the battery inner box; the drag chain assembly comprises end mounting plates at both ends and a plurality of chain links arranged in the middle, the chain links are hollow inside, and the chain links and the end mounting plates are in communication with each other to form an internal passage; the positive and negative electrode connecting cables of the battery inner box are inserted into the internal passage and extend to the outer side of the battery outer box along the direction of the drag chain assembly, so that the cables are continuously connected without breaking.
2. The battery box device for a metro vehicle based on a drag chain structure according to claim 1, characterized in that: The length of the drag chain assembly is designed according to the principle that there is no stretching margin of the cables when the battery inner box is completely pulled out, and the length should meet the maximum pulling stroke of the battery inner box.
3. A battery box device for a metro vehicle based on a drag chain structure according to claim 1 or 2, characterized in that: The bending radius of the drag chain assembly is greater than the minimum bending radius of the cables.
4. The battery box device for a metro vehicle based on a drag chain structure according to claim 1 or 2, characterized in that: In the reciprocating motion track range of the drag chain assembly, a safety gap is reserved between the inner wall of the battery outer box and the drag chain assembly.
5. A battery box device for a metro vehicle based on a drag chain structure according to claim 1 or 2, characterized in that: The outer side of the battery inner box is fixed with a bracket, the inner side of the battery outer box is fixed with a mounting plate, one end of the drag chain assembly is connected to the bracket through bolts, and the other end of the drag chain assembly is connected to the mounting plate through bolts.
6. A battery box device for a metro vehicle based on a drag chain structure according to claim 5, characterized in that: Mounting holes are reserved on the end mounting plates and connected to the bracket and the mounting plate through bolts.
7. A battery box device for a metro vehicle based on a drag chain structure according to claim 1 or 2, characterized in that: A pair of suspension arms are arranged at the left and right ends of the battery outer box, the suspension arms are in a foldable form, the suspension arms are support structures of the battery inner box and are also tracks for pulling the battery inner box out of the battery outer box, and rollers corresponding to the tracks are arranged on the outer side of the battery inner box.
8. The battery box device of a metro vehicle based on a tow chain type structure according to claim 7, characterized in that: Each suspension arm comprises a support body and a foldable body, the support body and the foldable body are connected through a hinge, the support body is fixed to the inner side of the battery outer box, and the foldable body is arranged at the end of the battery outer box.
9. The battery box device of a metro vehicle based on a tow chain type structure according to claim 7, characterized in that: The drag chain assembly is located above the suspension arms.