Slave support mounting structure of power battery

Abstract

The utility model discloses a slave support mounting structure of a power battery, and belongs to the technical field of power batteries. Comprising a switching structure which is mounted on a battery box body; the slave support assembly comprises a slave, a first slave support and a second slave support, the first slave support and the second slave support are arranged on the two sides of the slave, the side edge of the first slave support is turned outwards to form a first turned edge, a ribbon hole is formed in the first turned edge, and the second slave support is connected with the side face of the switching structure. The technical scheme has the beneficial effects that a switching structure is designed by utilizing the hole site on the battery box body, the installation requirement of a novel slave machine is met, a communication line penetrates through the ribbon hole, the distance between the communication line and a copper bar is increased, and interference of large-current charging and discharging on communication line signal transmission is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a slave bracket mounting structure of a power battery. Background Art

[0002] With the rapid development of new energy vehicles, the power battery systems used to power the entire vehicle are gaining increasing attention. For commercial vehicles such as buses and coaches, the power batteries used are often in standard packs. Standard packs are typically smaller in size and can meet the needs of different commercial vehicle customers by flexibly configuring the number of series and parallel connections at the battery pack level. When standard packs are promoted, internal configuration changes are typically made to meet customer needs, including whether to match the heating film and iterative replacement of the slave models within the standard pack.

[0003] A BMS (Battery Management System) is an electronic device that monitors and manages power batteries. It is generally divided into two modules: a master and a slave. The slave is responsible for monitoring voltage, current, temperature, and other parameters; the master is responsible for calculating the SOC (State of Charge), opening and closing relays, and thus controlling the charge and discharge functions of the power battery. The master and slave work together to protect the battery and improve its overall performance. The master and slave are typically fixed to the interior of the power battery via a set of sheet metal brackets, requiring installation using certain mounting holes on the battery case.

[0004] The existing technical solution is to modify the power battery that has been frozen in design: replace the slave inside the standard package. Due to the lengthening of the slave size, the normal installation method is to install the BMS slave bracket assembly without the adapter structure. Figure 1 As shown in the figure, the BMS is obstructing installation. The bracket mounting holes on the original battery box are blocked by the slave unit, preventing installation of the new slave unit. The in-box communication harness connecting to the BMS is secured with cable ties through the fixing holes on the side panel. The low-voltage harness is too close to the high-voltage copper busbar. When the high-voltage copper busbar draws excessive current, it will cause electromagnetic interference to the signal transmission of the attached low-voltage harness. Utility Model Content

[0005] The purpose of this utility model is to provide a slave bracket mounting structure for a power battery to solve the above technical problems;

[0006] A power battery slave bracket mounting structure, comprising:

[0007] The transfer structure is installed on the battery box;

[0008] The slave bracket assembly includes a slave and a first slave bracket and a second slave bracket arranged on both sides of the slave. The side of the first slave bracket is folded outward to form a first flange, and a tie hole is provided on the first flange. The second slave bracket is connected to the side of the adapter structure.

[0009] Preferably, the switching structure includes:

[0010] Install the bottom surface;

[0011] a bent surface, located above the mounting bottom surface;

[0012] A partition plate, one side of which is connected to the bent surface, and the other side of which is connected to the mounting bottom surface.

[0013] Preferably, the bending surface is divided into a first fixing area and a second fixing area with the partition plate as a boundary.

[0014] Preferably, a first through hole is provided on the first fixing area, and the adapter structure is connected to the battery box by a first fixing bolt passing through the first through hole.

[0015] Preferably, a crimping hole is provided on the second fixing area, and a rivet nut is provided in the crimping hole.

[0016] Preferably, slave fixing holes are respectively provided on both sides of the slave, and the slave is connected to the first slave bracket and the second slave bracket respectively by second fixing bolts passing through the slave fixing holes.

[0017] Preferably, it further comprises a third fixing bolt, and the transition structure is connected to the second slave bracket via the third fixing bolt passing through the rivet nut.

[0018] Preferably, a bracket fixing hole is provided on the battery box, and the mounting bottom surface is adapted to the base of the bracket fixing hole.

[0019] Preferably, a communication line connected to a battery management system is passed through the cable tie hole.

[0020] Preferably, an end of a side edge of the first slave bracket away from the first flange is folded inward to form a second flange, and a second through hole is formed in the second flange.

[0021] The beneficial effects of the present invention are as follows: the hole position on the battery box is used to design a transfer structure to meet the installation requirements of the new model slave machine; the communication line passes through the tie hole to increase the distance between the communication line and the copper busbar, thereby avoiding interference of large current charging and discharging on the communication line signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a schematic diagram of the installation of a slave bracket in the prior art;

[0023] Figure 2 This is a schematic diagram of the installation structure of the slave bracket of the utility model;

[0024] Figure 3 This is a structural diagram of the slave support assembly and the adapter structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the mounting hole of the box support of the present utility model.

[0026] In the accompanying drawings: 1. Transfer structure; 11. Installation bottom surface; 12. Bending surface; 13. Partition plate; 2. Slave bracket assembly; 21. First slave bracket; 22. Second slave bracket; 23. First flange; 24. Tie hole; 25. Slave; 251. Second fixing bolt; 26. Second flange; 27. Second through hole; 3. Battery case; 4. First through hole; 5. First fixing bolt; 6. Rivet nut; 7. Third fixing bolt; 8. Bracket fixing hole; 9. Communication line; 10. Copper busbar. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0030] A power battery slave bracket mounting structure, such as Figures 2 to 4 Shown, including,

[0031] The adapter structure 1 is installed on the battery box 3;

[0032] The slave bracket assembly 2 includes a slave 25 and a first slave bracket 21 and a second slave bracket 22 arranged on both sides of the slave 25. The side of the first slave bracket 21 is folded outward to form a first flange 23. A tie hole 24 is provided on the first flange 23. The second slave bracket 22 is connected to the side of the adapter structure 1.

[0033] Specifically, the utility model provides a slave bracket mounting structure for a power battery, which utilizes the hole positions on the existing battery box 3 to design a transfer structure 1. The transfer structure 1 connects the battery box 3 and the slave bracket assembly 2 to meet the installation requirements of the new model slave 25; through the design of the tie hole 24, the copper bus 10 is prevented from interfering with the nearby signal transmission when charging and discharging with excessive current.

[0034] In a preferred embodiment, referring to Figure 3 , the transfer structure 1 includes,

[0035] Installation bottom surface 11;

[0036] The bending surface 12 is located above the mounting bottom surface 11;

[0037] A partition plate 13, one side of the partition plate 13 is connected to the bent surface 12, and the other side of the partition plate 13 is connected to the mounting bottom surface 11;

[0038] The bending surface 12 is divided into a first fixing area and a second fixing area by a partition plate 13;

[0039] A first through hole 4 is provided on the first fixing area, and the adapter structure 1 is connected to the battery box 3 by a first fixing bolt 5 passing through the first through hole 4;

[0040] A crimping hole is provided on the second fixing area, and a rivet nut 6 is provided in the crimping hole.

[0041] Specifically, the adapter structure 1 is formed by bending and welding sheet metal. The mounting bottom surface 11 is connected to the pre-bent bent surface 12 by welding. The first through hole 4 is a circular hole with a diameter of 7 mm, matching the diameter of the first fixing bolt 5, and is pre-installed on the battery box 3.

[0042] An M6 rivet nut 6 is also crimped onto the second fixing area for connecting to the second slave bracket 22 to form a pre-assembled adapter structure 1 .

[0043] In a preferred embodiment, slave fixing holes are respectively provided on both sides of the slave 25, and the slave 25 is connected to the first slave bracket 21 and the second slave bracket 22 respectively by passing the second fixing bolts 251 through the slave fixing holes;

[0044] It also includes a third fixing bolt 7, and the adapter structure 1 is connected to the second slave bracket 22 through the third fixing bolt 7 passing through the rivet nut 6;

[0045] One end of the side of the first slave bracket 21 away from the first flange 23 is folded inward to form a second flange 26 , and a second through hole 27 is formed on the second flange 26 ;

[0046] A communication line 9 connected to the battery management system is passed through the tie hole 24 .

[0047] Specifically, the slave 25, the first slave bracket 21, and the second slave bracket 22 are pre-assembled into the slave bracket assembly 2 using four M5 second fixing bolts 251. Then, two third fixing bolts 7 are used to secure the slave 25 to the rivet nuts 6 crimped onto the pre-assembled adapter structure 1, completing the securement of the entire slave 25.

[0048] A first flange 23 is bent above the first slave bracket 21, and a tie hole 24 is provided for securing the low-voltage communication harness (i.e., the communication line 9). The low-voltage communication harness can be secured to the top of the slave bracket assembly 2, keeping it away from the high-voltage copper bus 10 to prevent electromagnetic interference during high current charging and discharging.

[0049] Based on the rivet nut 6 crimped on the adapter structure 1, the slave bracket assembly 2 is connected with the rivet nut 6 by means of bolts to avoid vibration or displacement problems caused by unstable brackets.

[0050] In a preferred embodiment, referring to Figure 4 The battery box 3 is provided with a bracket fixing hole 8, and the installation bottom surface 11 is adapted to the base of the bracket fixing hole 8.

[0051] Specifically, the mounting bottom surface 11 of the adapter structure 1 is contoured, and the mounting bottom surface 11 matches the outer contour of the base of the bracket fixing hole 8 , which can prevent the parts from rotating when a fixed torque is applied.

[0052] When standard boxes are promoted, a new generation of slave units with longer and thicker dimensions can be used. The present invention solves the problem of traditional installation and fixation, avoiding the substantial costs associated with changing the box design. It also increases the distance between the low-voltage wiring harness and the high-voltage copper busbar 10 within the box, improving the overall EMC (electromagnetic compatibility) test passability of the power battery.

[0053] In summary, the present application provides a slave bracket mounting structure for a power battery, which utilizes an adapter structure 1 to connect a battery case 3 and a slave bracket assembly 2, including a contoured bottom portion of the adapter structure 1 that can prevent rotation at a constant torque. This solves the problem that the BMS slave 25 is too long to be fixedly installed. When the sheet metal of the slave bracket is bent and formed, a flange structure is made on the top and a hole is opened, so that the low-voltage communication harness can be fixed to the top of the bracket assembly, keeping a distance from the high-voltage copper bus 10, preventing electromagnetic interference during high-current charging and discharging, and solving the problem that the slave harness has no suitable fixing point.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A power battery slave bracket mounting structure, characterized in that: include, The transfer structure (1) is mounted on the battery box (3); The slave bracket assembly (2) comprises a slave (25) and a first slave bracket (21) and a second slave bracket (22) arranged on both sides of the slave (25), wherein the side edge of the first slave bracket (21) is folded outward to form a first flange (23), and a tie hole (24) is provided on the first flange (23), and the second slave bracket (22) is connected to the side of the adapter structure (1).

2. The power battery slave bracket mounting structure according to claim 1, characterized in that: The switching structure (1) comprises: Mounting bottom surface (11); A bending surface (12) is located above the mounting bottom surface (11); A partition plate (13), one side of the partition plate (13) is connected to the bending surface (12), and the other side of the partition plate (13) is connected to the installation bottom surface (11).

3. The power battery slave bracket mounting structure according to claim 2, characterized in that: The bending surface (12) is divided into a first fixing area and a second fixing area by the partition plate (13).

4. The power battery slave bracket mounting structure according to claim 3, characterized in that: A first through hole (4) is provided on the first fixing area, and the adapter structure (1) is connected to the battery box (3) via a first fixing bolt (5) passing through the first through hole (4).

5. The power battery slave bracket mounting structure according to claim 3, characterized in that: A crimping hole is provided on the second fixing area, and a rivet nut (6) is provided in the crimping hole.

6. The power battery slave bracket mounting structure according to claim 1, characterized in that: Slave fixing holes are respectively provided on both sides of the slave (25), and the slave (25) is respectively connected to the first slave bracket (21) and the second slave bracket (22) via second fixing bolts (251) passing through the slave fixing holes.

7. The power battery slave bracket mounting structure according to claim 5, characterized in that: It also includes a third fixing bolt (7), and the transition structure (1) is connected to the second slave bracket (22) via the third fixing bolt (7) passing through the rivet nut (6).

8. The power battery slave bracket mounting structure according to claim 2, characterized in that: The battery box (3) is provided with a bracket fixing hole (8), and the mounting bottom surface (11) is adapted to the base of the bracket fixing hole (8).

9. The power battery slave bracket mounting structure according to claim 1, characterized in that: A communication line (9) connected to a battery management system is passed through the tie hole (24).

10. The power battery slave bracket mounting structure according to claim 1, characterized in that: One end of the side of the first slave bracket (21) away from the first flange (23) is folded inward to form a second flange (26), and a second through hole (27) is provided on the second flange (26).

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