A protective housing for a multi-cell integrated spot-welded battery pack

Abstract

This utility model discloses a protective housing for a multi-cell integrated spot-welded battery pack, including upper and lower housing assemblies covering the battery pack, with locking components mounted on one side of each. The upper housing has a connecting block with a connecting hole on one side and a moving groove on the other side, with a mating plate at the bottom of the groove. The lower housing has a mating block matching the connecting block on one side and a mating plate on the other side, with locking components mounted on the upper and lower sides of the mating plates. The locking components include a push plate connected to the moving groove, a locking pin connected to the bottom of the plate, and a compression spring installed between the pin and the top of the mating plate. A fixed shaft is located at the bottom of the mating plate on one side of the lower housing, with a rotating locking plate connected to the shaft, and a locking rod matching the locking pin at the end of the plate. This housing is quickly positioned by the connecting block and the mating block, and locking and unlocking are achieved through the push plate, compression spring, and locking pin. The rotating locking plate enhances the locking effect, making operation simple and maintenance easy. Furthermore, the T-shaped moving block prevents the push plate from detaching, and the arc-shaped rotating locking plate is equipped with a bushing and a limiting ring, improving structural reliability.

Description

Technical Field

[0001] This utility model specifically relates to a protective housing for a multi-cell integrated spot-welded battery pack. Background Technology

[0002] With the rapid development of new energy technologies, multi-cell integrated battery packs have been widely used in electric vehicles, portable electronic devices, energy storage systems, and other fields. To meet the demand for high energy density, spot welding has become the mainstream technology for the integrated assembly of multiple cells. This process can effectively reduce the connection resistance between cells and improve the overall performance of the battery pack. The safety and reliability of the battery pack under complex operating conditions such as charge-discharge cycles, vibration and shock, and temperature changes depend heavily on the structural design of the protective casing.

[0003] Traditional multi-cell protective housings often adopt a modular design, which involves assembling and connecting the frame and the cover plate, and then fixing them with external bolts. When inspecting the internal batteries, the bolts need to be unscrewed, which is time-consuming, affects inspection time, and delays use. Furthermore, without specialized disassembly equipment, it is difficult to disassemble the housing, which seriously affects maintenance efficiency.

[0004] Therefore, it is necessary to invent a protective casing for multi-cell integrated spot-welded battery packs to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes a protective shell for a multi-cell integrated spot-welded battery pack, which can quickly disassemble the shell and inspect internal components.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a protective housing for a multi-cell integrated spot-welded battery pack, comprising an upper housing assembly and a lower housing assembly disposed outside the battery pack, wherein a locking assembly is installed on one side of the upper housing assembly and the lower housing assembly; The upper housing assembly includes an upper housing, with multiple connecting blocks on one side of the upper housing, each connecting block having a connecting hole, and multiple moving slots on the other side of the upper housing, with docking plates at the bottom of the multiple moving slots; The lower housing assembly includes a lower housing. On one side of the lower housing, there are multiple mating blocks that match the connecting blocks. A connecting rod is provided between the multiple mating blocks. The multiple connecting rods are disposed in the connecting holes. On the other side of the lower housing, there are also multiple mating plates, and the upper and lower multiple mating plates are positioned correspondingly. The locking components are installed on the upper and lower sides of the mating plates. The locking assembly includes a push plate connected in the moving slot, a plurality of locking pins connected to the bottom of the push plate, the plurality of locking pins being installed in the docking plate, a compression spring being installed between the outside of the locking pins and the top of the docking plate, and a fixed shaft being provided on one side of the lower housing at the bottom of the docking plate, a rotating locking plate being connected to the fixed shaft, and a locking rod matching the locking pins being provided at the end of the rotating locking plate, the locking rod being locked in the locking pins.

[0007] Preferably, the docking plate has a locking hole, the multiple locking pins are sized to match the locking hole, and an L-shaped locking groove is formed on one side of the bottom of the locking pin. The pushing plate pushes the multiple locking pins out of the locking hole to the bottom, the rotating locking plate rotates the locking rod into the L-shaped locking groove, and the locking pin locks the locking rod at the bottom of the docking plate.

[0008] Preferably, the bottom of the rotating locking plate is provided with a bushing, the bushing is sleeved outside the fixed shaft, the locking rod at the end of the rotating locking plate is positioned to match the L-shaped locking groove, and the other end of the locking rod is also provided with a limiting ring.

[0009] Preferably, the rotating locking plate is arc-shaped.

[0010] Preferably, the push plate has a moving block on one side that matches the moving groove, and the moving block and the moving groove have the same internal shape, both being T-shaped.

[0011] Preferably, the two ends of the compression spring are fixed to the bottom of the push plate and the top of the docking plate, respectively, and are placed outside the locking post. The overall length of the locking post should at least exceed the thickness of the docking plates on the upper and lower sides.

[0012] Preferably, the upper housing and the lower housing are provided with matching mounting ports at their ends, and a connector is installed at the mounting port.

[0013] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are: 1. The connecting block of the upper shell and the docking block of the lower shell of this utility model are connected by a connecting rod, which can quickly achieve the initial positioning of the upper and lower shells. At the same time, the push plate in the locking assembly can move in the moving groove. Through the cooperation of the compression spring and the locking pin, the upper and lower shells can be easily locked and unlocked. The setting of the rotating locking plate further enhances the locking effect, and the operation is relatively simple, which facilitates the assembly of the battery pack and the subsequent maintenance and disassembly. 2. The moving block on one side of the push plate of this utility model is T-shaped and matched with the moving groove, which can prevent the push plate from falling out of the moving groove and ensure the normal operation of the locking component. The rotating locking plate is designed as an arc, and the bottom is provided with a bushing sleeve on the fixed shaft, and the end is provided with a limiting ring. These designs not only facilitate the rotation operation of the rotating locking plate, but also limit its movement, so that it can better cooperate with the locking post and improve the reliability of the overall structure. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the open structure of the upper and lower shells of this utility model; Figure 3 This is a schematic diagram of the upper locking component structure of this utility model; Figure 4 This is a schematic diagram of the distribution structure of the upper and lower shells of this utility model; Figure 5 This is a schematic diagram of the lower locking component structure of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Upper housing assembly; 11. Upper housing; 12. Connecting block; 13. Connecting hole; 14. Moving groove; 2. Lower housing assembly; 21. Lower housing; 22. Docking block; 23. Connecting rod; 3. Locking assembly; 31. Push plate; 311. Moving block; 32. Locking post; 33. Compression spring; 34. Fixed shaft; 35. Rotary locking plate; 351. Bushing; 36. Locking rod; 361. Limiting ring; 37. L-shaped locking groove; 4. Docking plate; 41. Locking hole; 5. Mounting port; 6. Connector. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model provides, for example Figure 1-5 The protective housing of a multi-cell integrated spot-welded battery pack shown includes an upper housing assembly 1 and a lower housing assembly 2 disposed outside the battery pack, and a locking assembly 3 is installed on one side of the upper housing assembly 1 and the lower housing assembly 2. Specifically, the upper housing assembly 1 includes an upper housing 11, with a plurality of connecting blocks 12 on one side of the upper housing 11, and connecting holes 13 inside the connecting blocks 12. On the other side of the upper housing 11, a plurality of moving grooves 14 are provided, and docking plates 4 are provided at the bottom of the plurality of moving grooves 14. Specifically, the lower housing assembly 2 includes a lower housing 21. On one side of the lower housing 21, there are multiple mating blocks 22 that match the connecting blocks 12. A connecting rod 23 is provided between the multiple mating blocks 22. The multiple connecting rods 23 are set in the connecting holes 13. On the other side of the lower housing 21, there are also multiple mating plates 4. The upper and lower multiple mating plates 4 are in corresponding positions. Locking components 3 are installed on the upper and lower sides of the mating plates 4. Specifically, the locking assembly 3 includes a push plate 31 connected in the moving groove 14. The bottom of the push plate 31 is connected to a plurality of locking pins 32. The plurality of locking pins 32 are installed in the docking plate 4. A compression spring 33 is installed between the outside of the locking pins 32 and the top of the docking plate 4. A fixed shaft 34 is also provided on one side of the lower housing 21 at the bottom of the docking plate 4. A rotating locking plate 35 is connected to the fixed shaft 34. The end of the rotating locking plate 35 is provided with a locking rod 36 that matches the locking pins 32. The locking rod 36 is locked in the locking pins 32.

[0019] Specifically, the docking plate 4 has a locking hole 41, and multiple locking pins 32 are sized to match the locking hole 41. An L-shaped locking groove 37 is provided on one side of the bottom of the locking pin 32. The pushing plate 31 pushes the multiple locking pins 32 out of the locking hole 41 to the bottom. The rotating locking plate 35 rotates the locking rod 36 into the L-shaped locking groove 37, and the locking pin 32 locks the locking rod 36 at the bottom of the docking plate 4.

[0020] Specifically, the bottom of the rotating locking plate 35 is provided with a bushing 351, which is sleeved on the outside of the fixed shaft 34. The locking rod 36 at the end of the rotating locking plate 35 is positioned to match the position of the L-shaped locking groove 37, and the other end of the locking rod 36 is also provided with a limiting ring 361.

[0021] Specifically, the rotating locking plate 35 is curved as a whole.

[0022] Specifically, a moving block 311 matching the moving groove 14 is provided on one side of the push plate 31. The moving block 311 and the moving groove 14 have matching internal shapes, both being T-shaped.

[0023] Specifically, the two ends of the compression spring 33 are fixed to the bottom of the push plate 31 and the top of the docking plate 4, respectively, and are placed outside the locking post 32. The overall length of the locking post 32 should at least exceed the thickness of the upper and lower docking plates 4.

[0024] Specifically, the upper housing 11 and the lower housing 21 are provided with matching mounting ports 5 at their ends, and a connector 6 is installed at the mounting port 5.

[0025] In this embodiment, the battery pack after multi-cell integrated spot welding is placed inside the lower housing 21, so that the connecting block 12 of the upper housing 11 is aligned with the docking block 22 of the lower housing 21, and the connecting rod 23 between the docking blocks 22 is inserted into the connecting hole 13 of the connecting block 12 to complete the initial positioning of the upper and lower housing components; at this time, the docking plate 4 on the other side of the upper housing 11 and the lower housing 21 are vertically aligned, and the locking hole 41 on the docking plate 4 is in a coaxial state.

[0026] Specifically, pressing the push plate 31 causes it to slide downwards along the moving groove 14 via the T-shaped moving block 311, compressing the locking pin 32, which is externally fitted with a compression spring 33. This causes the locking pin 32 to pass through the locking hole 41 of the vertically aligned docking plate 4, with its bottom extending below the lower docking plate 4. Subsequently, rotating the arc-shaped rotating locking plate 35 causes its bottom bushing 351 to rotate along the fixed shaft 34, screwing the locking rod 36 at its end into the L-shaped locking groove 37 at the bottom of the locking pin 32. The limiting ring 361 prevents the locking rod 36 from dislodging from the L-shaped locking groove 37, thus completing the locking process.

[0027] Specifically, a connector 6 is installed at the matching mounting port 5 at the ends of the upper and lower housings to achieve electrical connection between the battery pack and external equipment. For disassembly and maintenance, the locking plate 35 is rotated in the opposite direction to disengage the locking rod 36 from the L-shaped locking groove 37. The compression spring 33 returns to its original position and pushes the push plate 31 upward, causing the locking pin 32 to disengage from the locking hole 41. Then, the connecting rod 23 can be pulled out to separate the upper and lower housings.

[0028] In this embodiment, rapid positioning is achieved by the cooperation of the connecting block and the docking block through the rod holes. The combination of pressing the push plate and rotating the locking plate completes the locking and unlocking. No complicated tools are required, which greatly improves the efficiency of battery pack assembly and the convenience of subsequent maintenance, and solves the problem of cumbersome disassembly of traditional housings.

[0029] In this embodiment, the T-shaped moving block and the moving groove cooperate to prevent the push plate from falling off. After the locking post passes through the double docking plate, it forms a double lock with the locking rod through the L-shaped locking groove. The matching of the arc-shaped rotating locking plate with the bushing and the limiting ring further enhances the limiting effect, which can resist external forces such as vibration and impact and prevent the housing from loosening.

[0030] In this embodiment, the upper and lower housing components together form a sealed space to protect the battery pack. The matching design of the mounting port and connector ensures the stability of the electrical connection and reduces the intrusion of dust and moisture. The locking post length exceeds the thickness of the mating plate and the compression spring buffer design makes the structure more adaptable and suitable for various operating conditions.

[0031] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A protective housing for a multi-cell integrated spot-welded battery pack, characterized by: It includes an upper housing assembly (1) and a lower housing assembly (2) disposed outside the battery pack, and a locking assembly (3) is installed on one side of the upper housing assembly (1) and the lower housing assembly (2). The upper housing assembly (1) includes an upper housing (11), with a plurality of connecting blocks (12) on one side of the upper housing (11), and connecting holes (13) inside the connecting blocks (12). The upper housing (11) also has a plurality of moving slots (14) on the other side, and docking plates (4) at the bottom of the plurality of moving slots (14). The lower housing assembly (2) includes a lower housing (21). On one side of the lower housing (21) are a plurality of mating blocks (22) that match the connecting block (12). A connecting rod (23) is provided between the plurality of mating blocks (22). The plurality of connecting rods (23) are disposed in the connecting hole (13). On the other side of the lower housing (21) are also a plurality of mating plates (4), and the upper and lower plurality of mating plates (4) are positioned correspondingly. The locking assembly (3) is installed on the upper and lower sides of the mating plates (4). The locking assembly (3) includes a push plate (31) connected in the moving groove (14). The bottom of the push plate (31) is connected to a plurality of locking pins (32). The plurality of locking pins (32) are installed in the docking plate (4). A compression spring (33) is installed between the outside of the locking pin (32) and the top of the docking plate (4). A fixed shaft (34) is also provided on one side of the lower housing (21) at the bottom of the docking plate (4). A rotating locking plate (35) is connected on the fixed shaft (34). A locking rod (36) matching the locking pin (32) is provided at the end of the rotating locking plate (35). The locking rod (36) is locked in the locking pin (32).

2. A protective housing for a multi-cell integrated spot welding battery pack according to claim 1, wherein: The docking plate (4) is provided with a locking hole (41), and the size of the plurality of locking pins (32) matches the locking hole (41). An L-shaped locking groove (37) is provided on one side of the bottom of the locking pin (32). The pushing plate (31) pushes the plurality of locking pins (32) out of the locking hole (41) to the bottom. The rotating locking plate (35) rotates the locking rod (36) into the L-shaped locking groove (37). The locking pin (32) locks the locking rod (36) at the bottom of the docking plate (4).

3. The protective casing for a multi-cell integrated spot-welded battery pack according to claim 2, characterized in that: The bottom of the rotating locking plate (35) is provided with a bushing (351), which is sleeved on the outside of the fixed shaft (34). The locking rod (36) at the end of the rotating locking plate (35) is positioned to match the L-shaped locking groove (37), and the other end of the locking rod (36) is also provided with a limiting ring (361).

4. The protective casing for a multi-cell integrated spot-welded battery pack according to claim 3, characterized in that: The rotating locking plate (35) is arc-shaped.

5. The protective casing for a multi-cell integrated spot-welded battery pack according to claim 1, characterized in that: The push plate (31) has a moving block (311) on one side that matches the moving groove (14). The moving block (311) and the moving groove (14) have the same internal shape, both being T-shaped.

6. The protective casing for a multi-cell integrated spot-welded battery pack according to claim 1, characterized in that: The compression spring (33) is fixed at both ends to the bottom of the push plate (31) and the top of the docking plate (4), and is placed outside the locking post (32). The overall length of the locking post (32) should at least exceed the thickness of the docking plates (4) on the upper and lower sides.

7. The protective casing for a multi-cell integrated spot-welded battery pack according to claim 1, characterized in that: The upper housing (11) and the lower housing (21) are provided with matching mounting ports (5) at their ends, and a connector (6) is installed at the mounting port (5).

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