A vibration-resistant modular BMS resistor assembly

Abstract

This utility model relates to the technical field of modular BMS resistor components, and discloses a vibration-resistant modular BMS resistor component, including a fixed body, a resistor body slidably connected inside the fixed body, a buffer mechanism on the top of the fixed body, and a connecting mechanism inside the fixed body. The buffer mechanism includes a fixed plate, a fixed ring fixedly connected to the top of the fixed plate, and a limit post fixedly connected to the top of the fixed body. An anti-vibration component for buffering is provided outside the limit post. In this utility model, in the vertical direction, a buffer spring cooperates with the limit post to convert high-frequency vibration energy into spring deformation energy. Simultaneously, the annular limiting structure of the sliding ring and the fixed ring controls the lateral displacement of the circuit board, reducing the risk of solder joint fatigue failure. During horizontal vibration, the sliding ring assembly absorbs frequency energy through frictional loss, reducing the shear stress borne by the resistor body.

Description

Technical Field

[0001] This utility model relates to the technical field of modular BMS resistor components, and in particular to a vibration-resistant modular BMS resistor component. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems, and industrial equipment globally, the battery management system (BMS), as a core component for energy control, directly impacts equipment safety and lifespan. In complex environments such as automotive engine compartments and industrial machinery vibration platforms, BMS resistor components must withstand long-term broadband vibrations. Vibration-induced solder joint failures and component breakages in traditional resistor components have become key bottlenecks restricting system stability. Against this backdrop, the development of modular resistor components with high vibration resistance is urgently needed. The core objective is to achieve efficient vibration energy dissipation, precise displacement control, and convenient modular maintenance through structural innovation, thereby meeting the stringent industrial-grade reliability requirements of harsh environments.

[0003] Vibration-resistant BMS resistor assemblies typically employ resistive elements, fixed to a metal substrate by epoxy resin potting. Helical springs or rubber pads are installed at the substrate edges to absorb vertical vibration energy. The circuit board and resistive element are connected via soldering or pin-type interfaces, with an external encapsulation housing providing mechanical protection. During operation, vertical vibration loads are converted into elastic deformation energy by the buffer element, while horizontal vibrations rely on the rigid support of the encapsulation housing to disperse stress. However, this structure has significant drawbacks: unidirectional buffering cannot handle complex vibration scenarios, the potting material is prone to cracking under long-term vibration, and the soldered interfaces are susceptible to fatigue fracture under multi-directional forces, leading to resistance drift or short circuits, especially in the mid-to-high frequency vibration range, increasing the risk of component failure.

[0004] In the prior art, some devices have their resistive elements directly connected to the circuit board via solder joints. The shear stress generated during horizontal vibration acts directly on the connection interface, which can easily lead to solder joint detachment or cracking of the resistive film layer. To address this issue, a vibration-resistant modular BMS resistor assembly is proposed. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a vibration-resistant modular BMS resistor assembly, which aims to improve the problem of mechanical damage to components caused by multi-directional vibration in some existing devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A vibration-resistant modular BMS resistor assembly includes a fixed body, a resistor body slidably connected inside the fixed body, a buffer mechanism on the top of the fixed body, a connecting mechanism inside the fixed body, a fixed plate on the bottom of the fixed plate fixedly connected inside the fixed body, a fixed ring fixedly connected to the top of the fixed plate, a limit post fixedly connected to the top of the fixed body, and a shock-resistant component for buffering on the outside of the limit post.

[0008] As a further description of the above technical solution:

[0009] The connecting mechanism includes a quick-change button, the quick-change button is externally slidably connected to the inside of the fixed body, a limit ring is fixedly connected inside the fixed body, a spring is provided inside the limit ring, and the bottom of the spring is fixedly connected to the inside of the fixed body.

[0010] As a further description of the above technical solution:

[0011] The anti-seismic component includes a buffer spring, which is sleeved on the outside of the limiting post. The bottom of the buffer spring is fixedly connected to the top of the fixed body, and a sliding ring is fixedly connected to the top of the buffer spring.

[0012] As a further description of the above technical solution:

[0013] The outer side of the first sliding ring is slidably connected to the outside of the fixed ring, the top of the first sliding ring is slidably connected to the second sliding ring, and the top of the second sliding ring is fixedly connected to a circuit board.

[0014] As a further description of the above technical solution:

[0015] The bottom of the circuit board is slidably connected to the fixing ring, and the outside of the circuit board is slidably connected to the inside of the resistor body;

[0016] As a further description of the above technical solution:

[0017] The fixed body is provided with a limiting strip inside, and the two sides of the quick change button are slidably connected to the outside of the external limiting strip of the fixed body. A transmission plate is slidably connected to the outside of the quick change button.

[0018] As a further description of the above technical solution:

[0019] The transmission plate is slidably connected to a fixed hook, and a buffer spring is sleeved on the outside of the protruding strip of the fixed hook. One end of the buffer spring is fixedly connected to a limit plate.

[0020] As a further description of the above technical solution:

[0021] The limiting plate is fixedly connected to the outside of the fixing body, and the fixing hook is slidably connected to the outside of the resistor body through the external hole.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, in the vertical direction, the buffer spring and the limiting post cooperate to convert high-frequency vibration energy into spring deformation energy. At the same time, the annular limiting structure of the sliding ring and the fixed ring controls the lateral displacement of the circuit board, reducing the risk of solder joint fatigue failure. During horizontal vibration, the sliding ring group absorbs frequency energy through friction loss, and the residual vibration is evenly dispersed through the metal frame, which reduces the shear stress borne by the resistor body.

[0024] 2. In this utility model, the fixing hook automatically engages with the hole of the resistor body under the pre-tightening force of the buffer spring, forming a gapless rigid lock that can withstand the axial load under vibration acceleration. The elastic spring pushes the quick replacement button to the initial position through the limit ring, avoiding loosening of the connection mechanism due to vibration and ensuring the connection stability under long-term vibration environment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a vibration-resistant modular BMS resistor assembly proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the resistor body of a vibration-resistant modular BMS resistor assembly proposed in this utility model.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the fixing ring structure of a vibration-resistant modular BMS resistor assembly proposed in this utility model.

[0029] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0030] Legend:

[0031] 1. Fixed body; 2. Resistor body; 3. Quick change button; 4. Limiting post; 5. Buffer spring one; 6. Sliding ring one; 7. Circuit board; 8. Fixing ring; 9. Fixing plate; 10. Sliding ring two; 11. Limiting ring; 12. Elastic spring; 13. Transmission plate; 14. Limiting plate; 15. Fixing hook; 16. Buffer spring two. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1 to 3 This utility model provides an embodiment of a vibration-resistant modular BMS resistor assembly, including a fixed body 1, which is made of high-strength aluminum alloy with anodized surface treatment. A resistor body 2 is slidably connected inside the fixed body 1. The resistor body 2 has a built-in power resistor array, which can be configured with different resistance values ​​and rated power according to BMS requirements. The outside is wrapped with insulating and fireproof material. The resistor pins are welded to the circuit board 7. A buffer mechanism is provided on the top of the fixed body 1. The buffer mechanism is used to attenuate the impact of external vibration on the circuit board 7 and the resistor body 2 through elastic elements. A connecting mechanism is provided inside the fixed body 1. The connecting mechanism is used to realize the rapid locking and separation of the resistor body 2 and the fixed body 1.

[0034] The buffer mechanism includes a fixed plate 9, which is fixed to the top of the fixed body 1 by countersunk bolts. The plate surface has through holes for the limiting post 4 to pass through, providing a mounting base for the buffer assembly. The bottom of the fixed plate 9 is fixedly connected to the inside of the fixed body 1. The top of the fixed plate 9 is fixedly connected to a fixed ring 8. The top of the fixed body 1 is fixedly connected to a limiting post 4. The limiting post 4 is used to provide a vertical guide rail for the buffer spring and the sliding ring. The outside of the limiting post 4 is provided with a shock-absorbing component for buffering.

[0035] The anti-vibration component includes a buffer spring 5, which is used to attenuate vibration energy. The buffer spring 5 is sleeved on the outside of the limiting post 4. The bottom of the buffer spring 5 is fixedly connected to the top of the fixed body 1. A sliding ring 6 is fixedly connected to the top of the buffer spring 5. The sliding ring 6 is used to slide up and down along the limiting post 4. Its outer diameter is the same as the inner diameter of the fixed ring 8. A flange is provided in the middle of the ring and fixed to the top of the buffer spring to evenly transmit the spring force to the circuit board 7. The outside of the sliding ring 6 is slidably connected to the outside of the fixed ring 8. The top of the sliding ring 6 is slidably connected to a second sliding ring 10. The top of the second sliding ring 10 is fixedly connected to the circuit board 7. The circuit board 7 is double-sided printed and integrates the control circuit and signal transmission line of the resistor body 2. The bottom of the circuit board 7 is slidably connected to the fixed ring 8. The fixed ring 8 uses the limiting step at the top of the fixed ring 8 to limit the downward displacement of the circuit board 7. With the elastic floating of the sliding ring, the circuit board 7 maintains a horizontal posture when tilted and vibrating. The outside of the circuit board 7 is slidably connected to the inside of the resistor body 2.

[0036] Reference Figure 1 , Figure 4 and Figure 5 The connecting mechanism includes a quick-change button 3, which allows for one-handed unlocking of the resistor body 2, improving on-site maintenance efficiency. The quick-change button 3 is externally slidably connected to the inside of the fixed body 1. A limit ring 11 is fixedly connected inside the fixed body 1, limiting the axial displacement range of the button to prevent damage from excessive pressing. A through hole in the middle of the ring allows a spring 12 to pass through. The spring 12 is housed inside the limit ring 11, with its bottom fixedly connected to the inside of the fixed body 1. A limit strip is located inside the fixed body 1, engaging with grooves on both sides of the quick-change button 3 to guide the button's linear sliding and prevent jamming during vibration. The two sides of the quick-change button 3 are slidably connected to the outside of the external limiting strip of the fixed body 1. The external sliding connection of the quick-change button 3 is a transmission plate 13. The external sliding connection of the transmission plate 13 is a fixing hook 15. The surface of the fixing hook 15 is nickel plated and is aligned with the slot on the side of the resistor body 2 for easy automatic alignment when inserted into the slot. The external protrusion of the fixing hook 15 is fitted with a buffer spring 16. One end of the buffer spring 16 is fixedly connected to a limiting plate 14. The limiting plate 14 is used to limit the compression stroke of the buffer spring to prevent the spring from overload and failure. An elongated hole is opened on the plate surface for the tail of the fixing hook 15 to pass through. The external fixed connection of the limiting plate 14 is to the outside of the fixed body 1. The external sliding connection of the fixing hook 15 is to the external hole of the resistor body 2.

[0037] Working principle: The resistor body 2 is inserted along the guide structure of the fixed body 1 until its bottom contacts the fixed plate 9. At this time, the external hole of the resistor body 2 is aligned with the protrusion of the fixed hook 15. The fixed hook 15 is locked into the hole under the pre-tightening force of the buffer spring 16. The elastic spring 12 supports the limiting ring 11 to push the quick change button 3 to the initial position to ensure stable connection. The bottom of the circuit board 7 is embedded in the groove of the fixed ring 8, and the external part is connected to the conductive interface of the resistor body 2 to complete the electrical connection. The sliding ring 6 and the sliding ring 10 are respectively sleeved on the fixed ring 8 and the limiting post 4 and are in a stationary state.

[0038] During external vibration, the load is transmitted to the sliding ring 10 through the circuit board 7, causing the sliding ring 6 to slide axially along the limiting post 4. The buffer spring 5 absorbs vertical vibration energy through compression and tension. The sliding ring 6 cooperates with the fixed ring 8 to limit lateral displacement and avoid stress concentration at the solder joint. The fixed hook 15, combined with the buffer spring 16, provides elastic support, allowing slight displacement of the resistor body 2 and avoiding stress concentration in the rigid connection. The limiting strip limits the lateral displacement of the quick change button 3 and prevents the fixed hook 15 from disengaging. Pressing the quick change button 3 downward causes it to slide along the limiting strip and push the transmission plate 13 downward. The inclined structure causes the fixed hook 15 to retract to both sides and compress the buffer spring 16. The protrusion exits the hole of the resistor body 2 and is unlocked. The resistor body 2 is pulled upward, and the electrical interface between the circuit board 7 and the resistor body 2 is separated.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vibration-resistant modular BMS resistor assembly, comprising a fixed body (1), characterized in that: The fixed body (1) is internally slidably connected to a resistor body (2), the top of the fixed body (1) is provided with a buffer mechanism, and the interior of the fixed body (1) is provided with a connecting mechanism; The buffer mechanism includes a fixed plate (9), the bottom of which is fixedly connected to the inside of the fixed body (1), a fixed ring (8) is fixedly connected to the top of the fixed plate (9), a limit post (4) is fixedly connected to the top of the fixed body (1), and an anti-vibration component for buffering is provided on the outside of the limit post (4).

2. The vibration-resistant modular BMS resistor assembly according to claim 1, characterized in that: The connecting mechanism includes a quick-change button (3), which is externally slidably connected to the inside of the fixed body (1). A limit ring (11) is fixedly connected inside the fixed body (1), and a spring spring (12) is provided inside the limit ring (11). The bottom of the spring spring (12) is fixedly connected to the inside of the fixed body (1).

3. The vibration-resistant modular BMS resistor assembly according to claim 1, characterized in that: The anti-seismic component includes a buffer spring (5), which is sleeved on the outside of the limiting post (4). The bottom of the buffer spring (5) is fixedly connected to the top of the fixed body (1), and a sliding ring (6) is fixedly connected to the top of the buffer spring (5).

4. The vibration-resistant modular BMS resistor assembly according to claim 3, characterized in that: The outer side of the sliding ring one (6) is slidably connected to the outside of the fixed ring (8), the top of the sliding ring one (6) is slidably connected to the sliding ring two (10), and the top of the sliding ring two (10) is fixedly connected to the circuit board (7).

5. The vibration-resistant modular BMS resistor assembly according to claim 4, characterized in that: The bottom of the circuit board (7) is slidably connected to the fixing ring (8), and the outside of the circuit board (7) is slidably connected to the inside of the resistor body (2).

6. The vibration-resistant modular BMS resistor assembly according to claim 2, characterized in that: The fixed body (1) is provided with a limiting strip inside, and the two sides of the quick change button (3) are slidably connected to the outside of the external limiting strip of the fixed body (1). The quick change button (3) is slidably connected to the outside of the transmission plate (13).

7. The vibration-resistant modular BMS resistor assembly according to claim 6, characterized in that: The transmission plate (13) is slidably connected to a fixed hook (15), and a buffer spring (16) is sleeved on the outside of the outer protrusion of the fixed hook (15). One end of the buffer spring (16) is fixedly connected to a limit plate (14).

8. The vibration-resistant modular BMS resistor assembly according to claim 7, characterized in that: The limiting plate (14) is fixedly connected to the outside of the fixing body (1), and the fixing hook (15) is slidably connected to the outside of the external hole of the resistor body (2).

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