Multi-string lithium battery pack protection plate

Abstract

The utility model provides a multi-string lithium battery pack protection plate, which relates to the technical field of lithium batteries and comprises a protection plate, a shell is movably arranged on one side of the protection plate, an L-shaped plate is movably arranged on one side of the shell, and a fixing structure is fixedly arranged between the shell and the L-shaped plate. When a worker needs to detect and maintain a plurality of strings of battery pack protection plates, the worker drives a concave block to move downwards, the concave block moves to drive two inclined blocks to move in opposite directions, the two inclined blocks synchronously drive extending blocks connected with the inclined blocks to move relatively, the two extending blocks release fixation of an L-shaped plate, and then the L-shaped plate is fixed. Therefore, one side of the L-shaped plate is separated from the shell, the shell of the protection plate is detached, detection and maintenance of the protection plate are facilitated, and the detection and maintenance efficiency of the protection plate is improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a multi-string lithium battery pack protection board. Background Art

[0002] A multi-string lithium battery pack protection board is an electronic device used to monitor and protect multiple series-connected lithium-ion battery packs. It monitors the voltage and temperature of battery cells, balances charging and discharging, and prevents abnormal conditions such as overcharging, over-discharging, and short circuits. Its main components include battery management chips, protection chips, balancing circuits, etc., which can ensure the safe and reliable operation of the battery pack.

[0003] The existing multi-string battery pack protection board usually consists of a protection board and a housing. The housing is generally fixed outside the protection board by screws, etc. The protection board leads out a wiring harness from the housing to connect with the battery pack, so as to achieve the effect of battery protection and balancing. When the staff needs to detect and maintain the multi-string battery pack protection board, the staff needs to use tools to rotate and remove the screws, so as to remove the housing from the protection board for detecting and maintaining the protection board. However, it is too cumbersome for the staff to remove the screws with tools, which reduces the efficiency of detecting and maintaining the multi-string battery pack protection board.

[0004] Therefore, it is necessary to provide a new multi-string lithium battery pack protection board to solve the above technical problems. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a multi-string lithium battery pack protection board.

[0006] The multi-string lithium battery pack protection board provided by the utility model includes a protection board. A housing is movably arranged on one side of the protection board, and an L-shaped plate is movably arranged on one side of the housing. A fixing structure is fixedly arranged between the housing and the L-shaped plate;

[0007] The fixing structure includes a concave block. The concave block is movably arranged inside the housing. A trapezoidal groove is formed at the bottom of the concave block. Two inclined blocks are movably arranged at the bottom of the concave block. The opposite sides of the tops of the two inclined blocks are inclined. The tops of the two inclined blocks are fitted with the trapezoidal groove. A spring is fixedly arranged on the opposite sides of the two inclined blocks. An extending block is fixedly arranged on one side of each of the two inclined blocks. One side of each of the two extending blocks extends into the L-shaped plate, and the outer surfaces of the two extending blocks are movably connected with the inside of the L-shaped plate.

[0008] Preferably, an empty groove is formed inside the housing, a through groove communicating with the empty groove is formed at the top of the housing, a button is movably arranged inside the empty groove, the top of the button movably extends out of the through groove, the concave block is movably arranged inside the empty groove, and the bottom of the button is fixedly connected with the top of the concave block.

[0009] Preferably, a sliding groove and a strip-shaped groove communicating with the empty groove are formed inside the housing. A sliding plate is movably arranged inside the sliding groove. The sliding plate passes through two inclined blocks and extends out of the strip-shaped groove movably. A sliding block is fixedly arranged at one end of the sliding plate away from the inclined blocks. A spring is slidably sleeved on the outer surface of the sliding plate. Two ends of the spring are respectively fixedly connected to the opposite sides of the two inclined blocks. A limiting ring is fixedly sleeved on one side of the sliding plate close to the sliding block.

[0010] Preferably, a limiting groove communicating with the empty groove is formed inside the housing. Two limiting columns are movably arranged inside the limiting groove. The two limiting columns respectively extend into the two inclined blocks fixedly.

[0011] Preferably, a square groove is formed on one side of the L-shaped plate close to the protruding block. Two engaging grooves communicating with the square groove are formed on the inner side wall of the square groove. The two protruding blocks are movably arranged inside the square groove. The opposite sides of the two protruding blocks extend into the engaging grooves movably.

[0012] Preferably, a connecting block is fixedly arranged on one side of the housing away from the button. A connecting column is movably sleeved inside the connecting block. Two ends of the connecting column respectively extend into the housing movably.

[0013] Compared with the related art, the multi-string lithium battery pack protection board provided by the present utility model has the following beneficial effects:

[0014] When the staff needs to detect and maintain the multi-string battery pack protection board, the staff drives the concave block to move downward. The movement of the concave block drives the two inclined blocks to move in opposite directions. The two inclined blocks synchronously drive the connected protruding blocks to move relatively. The two protruding blocks release the fixation of the L-shaped plate, so that one side of the L-shaped plate is separated from the housing, thus completing the disassembly of the housing of the protection board for the detection and maintenance of the protection board, improving the detection and maintenance efficiency of the protection board to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the complete structure of the multi-string lithium battery pack protection board provided by the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the multi-string lithium battery pack protection board in an unfolded state;

[0017] Figure 3 is Figure 2 the schematic cross-sectional structure shown in Figure 1 ;

[0018] Figure 4 is Figure 3 the enlarged schematic structure of part A shown in

[0019] Figure 5 is Figure 4Schematic diagram of the partial structure shown;

[0020] Figure 6 is Figure 5 Schematic diagram of the exploded structure shown Figure 1 ;

[0021] Figure 7 is Figure 5 Schematic diagram of the exploded structure shown Figure 2 ;

[0022] Figure 8 is Figure 7 Schematic diagram of the partial structure shown;

[0023] Figure 9 is Figure 7 Schematic diagram of the partial sectional structure shown;

[0024] Figure 10 is Figure 3 Enlarged schematic diagram of the structure at position B shown;

[0025] Figure 11 is Figure 2 Schematic diagram of the structure of the section shown Figure 2 ;

[0026] Figure 12 is Figure 11 Enlarged schematic diagram of the structure at position C shown;

[0027] Figure 13 is Figure 12 Schematic diagram of the partial structure shown;

[0028] Figure 14 is Figure 1 Schematic diagram of the structure of the partial section shown;

[0029] Figure 15 is Figure 14 Schematic diagram of the partial sectional structure shown.

[0030] Reference numerals in the figure: 1. protection plate; 2. housing; 3. L-shaped plate; 4. connecting block; 5. connecting column; 6. protruding block; 7. inclined block; 8. concave block; 9. button; 10. limiting column; 11. sliding plate; 12. spring; 13. limiting ring; 14. sliding block; 15. empty groove; 16. limiting groove; 17. sliding groove; 18. strip-shaped groove; 19. square groove; 20. engaging groove; 21. fixing block; 22. through groove; 23. trapezoidal groove. Detailed implementation manners

[0031] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Please refer to Figures 1 - 15 , wherein,Figure 1 The complete structural schematic diagram of the multi-string lithium battery pack protection board provided by the present utility model; Figure 2 The structural schematic diagram of the multi-string lithium battery pack protection board in the unfolded state;

[0033] Figure 3 is Figure 2 the schematic cross-sectional structure shown Figure 1 ; Figure 4 is Figure 3 the enlarged structural schematic diagram of the position A shown; Figure 5 is Figure 4 the partial structural schematic diagram shown; Figure 6 is Figure 5 the exploded structural schematic diagram shown Figure 1 ; Figure 7 is Figure 5 the exploded structural schematic diagram shown Figure 2 ; Figure 8 is Figure 7 the partial structural schematic diagram shown; Figure 9 is Figure 7 the partial cross-sectional structural schematic diagram shown; Figure 10 is Figure 3 the enlarged structural schematic diagram of the position B shown; Figure 11 is Figure 2 the structural schematic diagram of the cross-section shown Figure 2 ; Figure 12 is Figure 11 the enlarged structural schematic diagram of the position C shown; Figure 13 is Figure 12 the partial structural schematic diagram shown; Figure 14 is Figure 1 the partial cross-sectional structural schematic diagram shown; Figure 15 is Figure 14 the partial cross-sectional structural schematic diagram shown.

[0034] In the specific implementation process, such as Figures 1 - 15As shown in the figure, it includes a protection plate 1. A housing 2 is movably arranged on one side of the protection plate 1. An L-shaped plate 3 is movably arranged on one side of the housing 2. A fixing structure is fixedly arranged between the housing 2 and the L-shaped plate 3. The fixing structure includes a concave block 8. The concave block 8 is movably arranged inside the housing 2. A trapezoidal groove 23 is formed at the bottom of the concave block 8. Two inclined blocks 7 are movably arranged at the bottom of the concave block 8. The opposite sides of the tops of the two inclined blocks 7 are inclined. The tops of the two inclined blocks 7 are fitted with the trapezoidal groove 23. A spring 12 is fixedly arranged on the opposite sides of the two inclined blocks 7. An extension block 6 is fixedly arranged on one side of each of the two inclined blocks 7. One side of each of the two extension blocks 6 extends into the L-shaped plate 3. The outer surfaces of the two extension blocks 6 are movably connected to the inside of the L-shaped plate 3. An empty groove 15 is formed inside the housing 2. A through groove 22 communicating with the empty groove 15 is formed at the top of the housing 2. A button 9 is movably arranged inside the empty groove 15. The top of the button 9 extends out of the through groove 22 movably. The concave block 8 is movably arranged inside the empty groove 15. The bottom of the button 9 is fixedly connected to the top of the concave block 8. A sliding groove 17 and a strip-shaped groove 18 communicating with the empty groove 15 are formed inside the housing 2. A sliding plate 11 is movably arranged inside the sliding groove 17. The sliding plate 11 passes through the two inclined blocks 7 and extends out of the strip-shaped groove 18 movably. A sliding block 14 is fixedly arranged at the end of the sliding plate 11 away from the inclined block 7. The spring 12 is slidably sleeved on the outer surface of the sliding plate 11. The two ends of the spring 12 are fixedly connected to the opposite sides of the two inclined blocks 7 respectively. A limiting ring 13 is fixedly sleeved on the side of the sliding plate 11 close to the sliding block 14. A limiting groove 16 communicating with the empty groove 15 is formed inside the housing 2. Two limiting columns 10 are movably arranged inside the limiting groove 16. The two limiting columns 10 are fixedly extended into the two inclined blocks 7 respectively. A square groove 19 is formed on the side of the L-shaped plate 3 close to the extension block 6. Two engaging grooves 20 communicating with the square groove 19 are formed on the inner side wall of the square groove 19. The two extension blocks 6 are movably arranged inside the square groove 19. The opposite sides of the two extension blocks 6 extend into the engaging grooves 20 movably. A connecting block 4 is fixedly arranged on the side of the housing 2 away from the button 9. A connecting column 5 is movably sleeved inside the connecting block 4. The two ends of the connecting column 5 extend into the housing 2 movably, as Figure 2 and Figure 3 shown, the L-shaped plate 3 is inside the through groove 22 and rotates around the connecting column 5. The protection plate 1 is arranged inside the through groove 22 and is fixed by a fixing block 21, as Figure 10 shown, the limiting groove 16 limits the limiting column 10, and the inclined block 7 is limited by the limiting column 10. There is an extension at the end of the limiting groove 16 away from the extension block 6 to limit the contracted inclined block 7 and extension block 6, as Figure 7 and Figure 10 shown, the sliding plate 11 is limited by the sliding groove 17 and the strip-shaped groove 18, and the sliding plate 11 is limited by the limiting ring 13, and the two inclined blocks 7 are driven by the spring 12, as Figure 15As shown, the engaging groove 20 limits the protruding block 6. After the staff completes the inspection and maintenance, when the housing 2 needs to be reinstalled onto the protection plate 1, the staff can drive the button 9 to move downward. The movement of the button 9 drives the concave block 8 connected thereto to move downward, thereby exerting a squeezing effect on the two inclined blocks 7 and driving the two inclined blocks 7 to move relatively. The movement of the two inclined blocks 7 drives the connected protruding blocks 6 to move relatively. At the same time, the staff drives the sliding block 14 to move. The sliding block 14 drives the sliding plate 11 to slide, and through the sliding plate 11, the contraction movement of the inclined blocks 7 and the protruding blocks 6 is completed. At the same time, the limiting column 10 slides in the limiting groove 16 to the corner to complete the limitation of the inclined blocks 7 and the protruding blocks 6, so that the staff can install the protection plate 1 inside the housing 2. Then the staff drives the L-shaped plate 3 to rotate to the position where it coincides with the housing 2. The staff can then drive the sliding block 14 to move towards the L-shaped plate 3 and drive the retraction of the protruding block 6 through the button 9 until the protruding block 6 extends into the square groove 19, completing the limitation of the engaging groove 20 by the protruding block 6, thereby realizing the installation of the protection plate 1 and the housing 2.

[0035] The working principle provided by the present utility model is as follows: When the staff needs to inspect and maintain the protection plate 1, the housing 2 needs to be disassembled. The staff can drive the button 9 to move downward. The movement of the button 9 drives the concave block 8 connected thereto to move downward, thereby exerting a squeezing effect on the two inclined blocks 7 and driving the two inclined blocks 7 to move relatively. The movement of the two inclined blocks 7 drives the connected protruding blocks 6 to move relatively, releasing the limitation of the protruding block 6 on the L-shaped plate 3 and completing the disassembly of the housing 2, so as to inspect and maintain the protection plate 1.

[0036] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated here.

[0037] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present utility model.

Claims

1. A multi-string lithium battery pack protection board, characterized in that: It comprises a protection plate (1), a shell (2) is movably provided on one side of the protection plate (1), an L-shaped plate (3) is movably provided on one side of the shell (2), and a fixing structure is fixedly provided between the shell (2) and the L-shaped plate (3); The fixing structure comprises a concave block (8), the concave block (8) being movably arranged inside the shell (2), a trapezoidal groove (23) being provided at the bottom of the concave block (8), two inclined blocks (7) being movably arranged at the bottom of the concave block (8), the top ends of the two inclined blocks (7) being arranged at an angle at opposite sides, the top ends of the two inclined blocks (7) being fitted with the trapezoidal groove (23), springs (12) being fixedly arranged on opposite sides of the two inclined blocks (7), protruding blocks (6) being fixedly arranged on one side of the two inclined blocks (7), one side of the two protruding blocks (6) extending into the interior of the L-shaped plate (3), and the outer surfaces of the two protruding blocks (6) being movably connected to the interior of the L-shaped plate (3).

2. The multi-string lithium battery protection board according to claim 1, characterized in that: The housing (2) has an empty slot (15) formed inside, a through slot (22) communicating with the empty slot (15) formed at the top of the housing (2), a button (9) movably provided inside the empty slot (15), the top of the button (9) movably extending out of the through slot (22), a concave block (8) movably arranged inside the empty slot (15), and a bottom of the button (9) fixedly connected to the top of the concave block (8).

3. The multi-string lithium battery pack protection board according to claim 2, characterized in that: The housing (2) is provided with a sliding groove (17) and a strip groove (18) which are communicated with the empty groove (15); a sliding plate (11) is movably provided inside the sliding groove (17); the sliding plate (11) passes through the two inclined blocks (7) and movably extends out of the strip groove (18); a sliding block (14) is fixedly provided at one end of the sliding plate (11) away from the inclined block (7); a spring (12) is slidably sleeved on the outer surface of the sliding plate (11); two ends of the spring (12) are respectively fixedly connected to opposite sides of the two inclined blocks (7); and a limiting ring (13) is fixedly sleeved on the side of the sliding plate (11) adjacent to the sliding block (14).

4. The multi-string lithium battery pack protection board according to claim 3, characterized in that: A limiting groove (16) communicating with the empty groove (15) is provided inside the housing (2), and two limiting columns (10) are movably provided inside the limiting groove (16), and the two limiting columns (10) are respectively fixed and extend into the inside of the two inclined blocks (7).

5. The multi-string lithium battery pack protection board according to claim 4, characterized in that: The L-shaped plate (3) is provided with a square groove (19) on one side adjacent to the protruding block (6); the inner side wall of the square groove (19) is provided with two engaging grooves (20) communicating with the square groove; the two protruding blocks (6) are movably arranged inside the square groove (19); and the opposite side of the two protruding blocks (6) movably extends into the engaging groove (20).

6. The multi-string lithium battery pack protection board according to claim 5, characterized in that: A connecting block (4) is fixedly provided on a side of the housing (2) away from the button (9), a connecting column (5) is movably sleeved inside the connecting block (4), and both ends of the connecting column (5) are movably extended into the housing (2).

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