Power lithium battery BMS protection plate

Abstract

The utility model relates to the technical field of power batteries, and discloses a power lithium battery BMS (battery management system) protection plate, which comprises a lower shell, an upper shell and a circuit board assembly, elastic clamping blocks are fixedly connected to two sides of the lower shell, clamping grooves matched with the elastic clamping blocks are formed in two sides of the upper shell, an elastic sealing ring is fixedly connected to the top of the lower shell, and the elastic sealing ring is fixedly connected to the top of the upper shell. An insertion block is slidably connected to the interior of the lower shell, an insertion groove is formed in the middle of the insertion block and matched with the circuit board assembly, limiting assemblies are fixedly connected to the two sides of the upper shell, and ejection assemblies are fixedly connected to the four corners of the interior of the lower shell. When the power lithium battery BMS protection plate is disassembled and maintained, only the upper end of the elastic clamping block needs to be poked in the direction away from the upper shell, so that the elastic clamping block is separated from the clamping groove, then the upper shell is pulled out upwards, and the whole disassembling process is simple, convenient and easy to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely is a kind of power lithium battery BMS protection plate. BACKGROUND

[0002] BMS (Battery Management System, battery management system) is the core control system in battery pack, it prevents overcharge, overdischarge and other potential risks by accurately monitoring the state of each battery unit, while optimizing the working performance of battery, main responsibilities include voltage monitoring, temperature control, power balance, current detection, state estimation and safety management etc., provide reliable power support for user and guarantee the overall safety of system.

[0003] In prior art, such as patent authorized announcement No.CN219269242U discloses a kind of novel BMS shell, including detachably connected upper shell cover and base, the cavity for installing circuit board is equipped between the base and the upper shell cover, the first installation part and the second installation part are provided on the upper shell cover, the first installation part is set to the upper shell cover, the first installation part is used to the upper shell cover with the base fixed, the second installation part includes at least two installation seat that are arranged at the top corner of the upper shell cover, the installation sleeve is nested in the installation seat, by the fastener through the installation sleeve is realized with other equipment fixed.The position of first installation part and second installation part is reasonably arranged, fastening and installation are realized in the structure of BMS shell body, the space position of upper shell cover is reasonably utilized, smaller in size, more lightweight.

[0004] The above-mentioned BMS shell still has certain defects: BMS protection plate generally adopts the way of pouring glue and bolt combination to connect and fix, although this method makes BMS protection plate have good sealing performance, effectively resists the invasion of external environment, but at the same time, it also brings a problem that cannot be ignored, that is, when the protection plate needs to be disassembled to maintain the internal circuit board, the operation process is relatively complex, which is not conducive to improving the maintenance efficiency. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of prior art, the utility model provides a kind of power lithium battery BMS protection plate, so that lower shell and upper shell are more simple and convenient when disassembling.

[0006] To achieve the above object, the utility model provides the following technical scheme: a power lithium cell BMS protection board, including lower casing, upper casing and circuit board component, the both sides of lower casing are all fixed with elastic clamping block, the both sides of upper casing are all provided with the clamping groove that matches with elastic clamping block, the top of lower casing is fixed with elastic sealing ring, the inside of lower casing is slidably connected with the plug-in block, the middle position of plug-in block is provided with the slot, and the slot is matched with circuit board component, the both sides of upper casing are all fixed with limiting component, and the four corners in the inside of lower casing are all fixed with ejection component.

[0007] Further, the limiting component includes a cylinder, a reset elastic member, a rotating block and a limiting block, the cylinder is fixed to the inner wall of the clamping groove, the cylinder has the rotating block slidably connected to the end away from the upper casing, the cylinder has the reset elastic member inside, one end of the reset elastic member is fixed to the upper casing, the other end of the reset elastic member is fixed to the rotating block, the limiting block is fixed to the end of the rotating block away from the upper casing, and the sliding groove matched with the cylinder is formed in the middle position of the upper end of the elastic clamping block.

[0008] Further, the sliding groove has the limiting groove communicated therewith on both sides, and the limiting groove is matched with the limiting block.

[0009] Further, the ejection component includes a positioning column and an upward pushing elastic member, the four corners of the plug-in block are slidably connected with the positioning column, the bottom of the positioning column is fixed to the lower casing, the lower end of the positioning column is sleeved with the upward pushing elastic member, the upper end of the upward pushing elastic member is fixed to the plug-in block, and the lower end of the upward pushing elastic member is fixed to the lower casing.

[0010] Further, the four corners in the inside of the upper casing are fixed with the extrusion fixing ring, and the inner diameter of the extrusion fixing ring is equal to the outer diameter of the upper end of the positioning column.

[0011] Further, the front end of the lower casing is fixed with a plurality of end supporting blocks.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The power lithium cell BMS protection board only needs to push the upper end of the elastic clamping block away from the upper casing to make the elastic clamping block separate from the clamping groove, and then pull out the upper casing upward to achieve the disassembly and maintenance, so that the whole disassembly process is simple, convenient and easy to operate. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the overall structural schematic view of the utility model;

[0015] Figure 2 It is the partial sectional view when the utility model is unfolded;

[0016] Figure 3 It is the utility model Figure 2A local enlarged structure schematic view at the middle A;

[0017] Figure 4 For the utility model Figure 2 A local enlarged structure schematic view at the middle B;

[0018] Figure 5 For the utility model lower shell structure schematic view;

[0019] Figure 6 For the utility model upper shell bottom structure schematic view;

[0020] Figure 7 For the utility model plug block structure schematic view.

[0021] In the figure: 1, lower shell; 2, upper shell; 3, circuit board assembly; 4, clamping groove; 5, elastic clamping block; 6, elastic sealing ring; 7, plug block; 8, plug slot; 9, sliding slot; 10, limiting slot; 11, cylinder; 12, reset elastic member; 13, rotating block; 14, limiting block; 15, positioning column; 16, push elastic member; 17, extrusion fixing ring; 18, end support block. Specific embodiments

[0022] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Please refer to Figures 1-7 A power lithium battery BMS protection board, including lower shell 1, upper shell 2 and circuit board assembly 3, the both sides of lower shell 1 are fixed with elastic clamping block 5, the both sides of upper shell 2 are provided with clamping groove 4 matched with elastic clamping block 5, the top of lower shell 1 is fixed with elastic sealing ring 6, the inside of lower shell 1 is slidably connected with plug block 7, the middle position of plug block 7 is provided with plug slot 8, plug slot 8 is matched with circuit board assembly 3, the both sides of upper shell 2 are fixed with limiting assembly, the four corners in the inside of lower shell 1 are fixed with ejection assembly.

[0024] The power lithium battery BMS protection plate in the utility model, when disassembling and maintaining, only need to push the upper end of the elastic clamping block 5 to the direction of moving away from the upper shell 2, make the elastic clamping block 5 separate from the clamping groove 4, then pull out the upper shell 2, then the plug 7 will lose the restriction of the upper shell 2, and will move up under the push of the ejection assembly, thereby exposing the circuit board assembly 3, so that the operator can maintain or maintain, and after the maintenance or maintenance is completed, only need to insert the circuit board assembly 3 into the insertion slot 8 again, then align the upper shell 2 with the lower shell 1, then press the upper shell 2, until the elastic clamping block 5 is inserted into the clamping groove 4, the whole disassembling process is simple, convenient and easy to operate, effectively improves the maintenance or maintenance efficiency, and the sealing property between the lower shell 1 and the upper shell 2 is good after being closed, in addition, the structure of the lower shell 1, the upper shell 2 and the circuit board assembly 3 in the utility model is similar to the novel BMS shell structure disclosed in the patent with the patent authorization announcement No.

[0025] As Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 , the limiting assembly includes a cylinder 11, a reset elastic piece 12, a rotating block 13 and a limiting block 14, the cylinder 11 is fixedly connected with the inner wall of the clamping groove 4, the end, away from the upper shell 2, of the cylinder 11 is slidably connected with the rotating block 13, the inside of the cylinder 11 is provided with the reset elastic piece 12, one end of the reset elastic piece 12 is fixedly connected with the upper shell 2, the other end of the reset elastic piece 12 is fixedly connected with the rotating block 13, the limiting block 14 is fixedly connected with the end, away from the upper shell 2, of the rotating block 13, and the middle position of the upper end of the elastic clamping block 5 is provided with a sliding groove 9 matched with the cylinder 11.

[0026] As Figure 5 indicated, the two sides of the sliding groove 9 are provided with limiting grooves 10 in communication with the sliding groove 9, and the limiting grooves 10 are matched with the limiting block 14.

[0027] Specifically, after the elastic clamping block 5 is inserted into the clamping groove 4, the limiting block 14 can be pulled away from the upper shell 2, so that the limiting block 14 is separated from the sliding groove 9, then the limiting block 14 is rotated, so that the limiting block 14 is aligned with the limiting groove 10, then the limiting block 14 is loosened, under the pull of the reset elastic piece 12, the limiting block 14 will enter the limiting groove 10, thereby avoiding the self-moving of the elastic clamping block 5, so that the upper shell 2 and the lower shell 1 lose the restriction.

[0028] As Figure 2 , Figure 4 and Figure 5As shown, the ejection assembly includes positioning posts 15 and upward elastic members 16. Positioning posts 15 are slidably connected to the four corners of the insertion block 7. The bottom of the positioning posts 15 is fixedly connected to the lower housing 1. The lower end of the positioning posts 15 is fitted with the upward elastic members 16. The upper end of the upward elastic members 16 is fixedly connected to the insertion block 7, and the lower end of the upward elastic members 16 is fixedly connected to the lower housing 1.

[0029] like Figure 2 and Figure 6 As shown, each of the four corners inside the upper housing 2 is fixed with a compression fixing ring 17, and the inner diameter of the compression fixing ring 17 is equal to the outer diameter of the upper end of the positioning post 15.

[0030] Specifically, when the upper housing 2 is removed from the lower housing 1, the compression fixing ring 17 will disengage from the upper end of the positioning post 15, and the insert 7 will lose its restraint. Under the action of the upward elastic member 16, the insert 7 will move upward with the circuit board assembly 3, so that the circuit board assembly 3 is misaligned with the lower housing 1. In this way, when the operator removes the circuit board assembly 3, he / she only needs to pull it out.

[0031] like Figure 5 As shown, multiple end support blocks 18 are fixed to the front end of the lower housing 1.

[0032] Specifically, the end support block 18 supports the end of the circuit board assembly 3 to prevent the circuit board assembly 3 from being damaged due to lack of support at the end when subjected to pressure.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A power lithium battery BMS protection plate, comprising a lower shell (1), an upper shell (2) and a circuit board assembly (3), characterized in that, Both sides of the lower shell (1) are fixed with elastic clamping blocks (5), both sides of the upper shell (2) are provided with clamping grooves (4) matched with the elastic clamping blocks (5), the top of the lower shell (1) is fixed with an elastic sealing ring (6), the inside of the lower shell (1) is slidably connected with an insertion block (7), the middle position of the insertion block (7) is provided with an insertion slot (8) matched with the circuit board assembly (3), both sides of the upper shell (2) are fixed with limiting assemblies, and the four corners of the inside of the lower shell (1) are fixed with ejection assemblies.

2. The power lithium battery BMS protection board according to claim 1, characterized in that, The limiting assembly comprises a cylinder (11), a reset elastic member (12), a rotating block (13) and a limiting block (14), the cylinder (11) is fixed with the inner wall of the clamping groove (4), the end of the cylinder (11) away from the upper shell (2) is slidably connected with the rotating block (13), the inside of the cylinder (11) is provided with the reset elastic member (12), one end of the reset elastic member (12) is fixed with the upper shell (2), the other end of the reset elastic member (12) is fixed with the rotating block (13), and the limiting block (14) is fixed with the end of the rotating block (13) away from the upper shell (2), and the upper end of the elastic clamping block (5) is provided with a sliding groove (9) matched with the cylinder (11).

3. The power lithium battery BMS protection board according to claim 2, characterized in that, Both sides of the sliding groove (9) are provided with limiting grooves (10) in communication therewith, and the limiting grooves (10) are matched with the limiting block (14).

4. The power lithium battery BMS protection board according to claim 1, 2 or 3, characterized in that, The ejection assembly comprises a positioning column (15) and an upward pushing elastic member (16), the four corners of the insertion block (7) are slidably connected with the positioning columns (15), the bottom of the positioning column (15) is fixed with the lower shell (1), the lower end of the positioning column (15) is sleeved with the upward pushing elastic member (16), the upper end of the upward pushing elastic member (16) is fixed with the insertion block (7), and the lower end of the upward pushing elastic member (16) is fixed with the lower shell (1).

5. The power lithium battery BMS protection board according to claim 4, characterized in that, The four corners of the inside of the upper shell (2) are fixed with extrusion fixing rings (17), and the inner diameter of the extrusion fixing ring (17) is equal to the outer diameter of the upper end of the positioning column (15).

6. The power lithium battery BMS protection board according to claim 1, 2, 3 or 5, characterized in that, The front end of the lower shell (1) is fixed with a plurality of end supporting blocks (18).

7. The power lithium battery BMS protection board according to claim 4, characterized in that, The front end of the lower shell (1) is fixed with a plurality of end supporting blocks (18).

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