Flexible package polymer lithium battery pack structure

Abstract

The utility model discloses a flexible package polymer lithium battery pack structure, which belongs to the technical field of lithium batteries and comprises a lithium battery assembly, a lower box seat is mounted above the lithium battery assembly, an upper box seat is mounted above the lower box seat, and a cathode wire inlet is arranged between the lower box seat and the upper box seat. A wire outlet is formed between the lower box base and the upper box base and located on one side of the negative wire inlet, a cooling fin is installed above the upper box base, and a buffer sealing device is arranged on the outer side of the lithium battery assembly; according to the utility model, the buffer sealing device is arranged, so that the structure can reduce the influence caused by external vibration through the cooperation of the small damper and the elastic rubber frame, and can drive the air around the cooling fins to flow through the fan, thereby ensuring the normal operation of the cooling work; and external impurities and moisture can be prevented from entering the cathode wire inlet and the cathode wire outlet through the sealing sleeve when the structure does not work, so that the working capability of the structure is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a soft-packaged polymer lithium battery group structure. Background Art

[0002] Lithium battery is a primary battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. It is different from rechargeable lithium-ion batteries and lithium-ion polymer batteries.

[0003] Chinese patent application No. 201922119846.8 discloses a soft-package polymer lithium battery pack with an improved structure, including a fixing frame, a lithium battery, a junction box seat and a heat sink. The fixing frame includes a silicone plate, a base, and an aluminum-plastic film. The base is a rectangular plate with evenly distributed square grids. The material of the base is PPS engineering plastic. The width of the square grid of the base is greater than the diameter of the lithium battery. A circular hole is opened in the middle of the square grid of the base and the holes are smaller than the diameter of the lithium battery. By using the silicone plate as a separator for the lithium battery, the lithium battery pack has the functions of shock resistance, insulation and heat conduction, so that the problem of one battery will not affect other batteries. The upper box seat and the lower box seat are filled with rubber seals and thermal grease to make the whole have good sealing properties, and the temperature on the circuit board will be transferred to the heat sink by the thermal grease, thereby dissipating the temperature of the PCB board well.

[0004] 1. The above-mentioned public patent has the problem that it is easily affected by external vibrations, the heat sink is difficult to dissipate heat effectively when the surrounding air is not flowing, and external impurities and moisture are easy to enter the negative electrode inlet and outlet when not working, thereby reducing the working capacity of the lithium battery pack; 2. The above-mentioned public patent has the problem that it cannot assist in fixing its own position when needed, thereby reducing the practicality of the lithium battery pack. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a soft-package polymer lithium battery pack structure, which has the characteristics of high working capacity and strong practicality.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a soft-package polymer lithium battery pack structure, including a lithium battery assembly, a lower box seat is installed above the lithium battery assembly, an upper box seat is installed above the lower box seat, a negative electrode line inlet is arranged between the lower box seat and the upper box seat, a line outlet is arranged between the lower box seat and the upper box seat and at a position located on the side of the negative electrode line inlet, a heat sink is installed above the upper box seat, a buffer sealing device is arranged on the outside of the lithium battery assembly, and an auxiliary fixing device is installed on the outside of the bottom of the buffer sealing device.

[0007] Preferably, the buffer sealing device includes a support frame, a connecting plate, a small damper, an elastic rubber frame and a sealing assembly, a connecting plate is installed below the lithium battery assembly, a support frame is arranged on the outside of the connecting plate, an elastic rubber frame is installed between the outer bottom surface of the connecting plate and the inner bottom surface of the support frame, a plurality of small dampers are installed between the outer bottom surface of the connecting plate and the inner bottom surface of the support frame and at a position inside the elastic rubber frame, and a sealing assembly is installed on the connecting plate and at a position outside the heat sink.

[0008] Preferably, the buffer sealing device further comprises a fan, and the fan is arranged on the support frame and at a position on one side of the heat sink.

[0009] Preferably, the buffer sealing device further comprises a mesh cylinder, and the mesh cylinder is installed between the support frame and the fan and at a position outside the fan.

[0010] Preferably, the closing assembly includes a screw, a lifting plate, a knob and a closing sleeve, a screw is installed through a bearing above the connecting plate and at a position on one side of the lithium battery assembly, a knob is installed above the screw, a lifting plate is installed through a thread on the outside of the screw, and a closing sleeve is installed on the lifting plate and at a position outside the heat sink.

[0011] Preferably, the closure assembly further comprises a guide rod, which is mounted on the connecting plate and located at a position on the side of the screw rod away from the lithium battery assembly.

[0012] Preferably, the auxiliary fixing device includes a base box, a rotating plate, a screw, a suction cup and a movable plate. The base box is installed below the support frame, a screw is installed on the base box at a position on one side of the support frame through a thread, a rotating plate is installed above the screw, a movable plate is installed below the screw and at a position inside the base box through a bearing, and a plurality of suction cups are installed below the movable plate.

[0013] Preferably, the shape and size of the inner cross section of the bottom box are the same as the shape and size of the outer cross section of the movable plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model provides a buffer sealing device, so that the structure can reduce the impact of external vibration through the cooperation of a small damper and an elastic rubber frame, and can drive the air flow around the heat sink through a fan, thereby ensuring the normal heat dissipation work, and can prevent external impurities and moisture from entering the negative electrode inlet and outlet through a sealing sleeve when not working, thereby improving the working capacity of the structure.

[0016] 2. The utility model provides an auxiliary fixing device so that the structure can be auxiliary fixed to its own position when needed through the cooperation of structures such as suction cups and movable plates, so as to better meet the working needs in different situations and thus improve the practicality of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a three-dimensional cutaway view of the utility model;

[0019] Figure 3 It is a three-dimensional cutaway view of the buffer sealing device of the utility model;

[0020] Figure 4 It is a three-dimensional cutaway view of the auxiliary fixing device of the utility model.

[0021] In the figure: 1. lithium battery assembly; 2. lower box seat; 3. wire outlet; 4. upper box seat; 5. heat sink; 6. buffer sealing device; 61. support frame; 62. connecting plate; 63. small damper; 64. elastic rubber frame; 65. sealing assembly; 651. screw rod; 652. lifting plate; 653. guide rod; 654. knob; 655. sealing sleeve; 66. mesh tube; 67. fan; 7. auxiliary fixing device; 71. bottom box; 72. rotating plate; 73. screw rod; 74. suction cup; 75. moving plate; 8. negative electrode inlet. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1

[0024] See also Figure 1-4 The utility model provides the following technical solutions: a soft-package polymer lithium battery pack structure, including a lithium battery assembly 1, a lower box seat 2 is installed above the lithium battery assembly 1, an upper box seat 4 is installed above the lower box seat 2, a negative electrode line inlet 8 is arranged between the lower box seat 2 and the upper box seat 4, an outlet 3 is arranged between the lower box seat 2 and the upper box seat 4 and at a position on one side of the negative electrode line inlet 8, a heat sink 5 is installed above the upper box seat 4, a buffer sealing device 6 is arranged on the outside of the lithium battery assembly 1, and an auxiliary fixing device 7 is installed on the outside of the bottom of the buffer sealing device 6.

[0025] Specifically, the buffer sealing device 6 includes a support frame 61, a connecting plate 62, a small damper 63, an elastic rubber frame 64 and a sealing component 65. The connecting plate 62 is installed below the lithium battery assembly 1, and the support frame 61 is arranged on the outer side of the connecting plate 62. The elastic rubber frame 64 is installed between the outer bottom surface of the connecting plate 62 and the inner bottom surface of the support frame 61. A plurality of small dampers 63 are installed between the outer bottom surface of the connecting plate 62 and the inner bottom surface of the support frame 61 and at a position inside the elastic rubber frame 64. The sealing component 65 is installed on the connecting plate 62 and at a position outside the heat sink 5.

[0026] By adopting the above technical solution, the structure can buffer external vibration to a certain extent through the cooperation of the small damper 63 and the elastic rubber frame 64, thereby reducing the possibility of adverse effects of external vibration on work.

[0027] Specifically, the buffer sealing device 6 further includes a fan 67 , and the fan 67 is disposed on the support frame 61 and at a position on one side of the heat sink 5 .

[0028] By adopting the above technical solution, the structure can drive the air around the heat sink 5 to flow through the fan 67 when needed, thereby taking away the heat on the heat sink 5, thereby ensuring the normal heat dissipation work.

[0029] Specifically, the buffer sealing device 6 further includes a net tube 66 , and the net tube 66 is installed between the support frame 61 and the fan 67 and at a position outside the fan 67 .

[0030] By adopting the above technical solution, the structure can prevent surrounding personnel from accidentally touching the fan 67 through the net tube 66, thereby reducing the possibility of surrounding personnel being injured by the fan 67 and better meeting the needs of the staff.

[0031] Specifically, the closing assembly 65 includes a screw rod 651, a lifting plate 652, a knob 654 and a closing sleeve 655. The screw rod 651 is installed through a bearing above the connecting plate 62 and at a position on one side of the lithium battery assembly 1. The knob 654 is installed above the screw rod 651. The lifting plate 652 is installed on the outer side of the screw rod 651 through a thread. The closing sleeve 655 is installed on the lifting plate 652 and at a position outside the heat sink 5.

[0032] By adopting the above technical solution, the structure can seal the negative electrode inlet 8 and the outlet 3 through the sealing sleeve 655 when not in operation, thereby preventing external impurities and moisture from entering the negative electrode inlet 8 and the outlet 3.

[0033] Specifically, the closing assembly 65 further includes a guide rod 653 , which is installed on the connecting plate 62 and at a position on the side of the screw rod 651 away from the lithium battery assembly 1 .

[0034] By adopting the above technical solution, the movement of the lifting plate 652 can be guided and limited to a certain extent by the guide rod 653, thereby preventing the movement of the lifting plate 652 from rotating and deviating, and ensuring the normal operation.

[0035] When the present embodiment is used, when the structure needs to be used, the knob 654 in the sealing component 65 of the buffer sealing device 6 is rotated, thereby driving the screw rod 651 to rotate. The screw rod 651 is threadedly connected to the lifting plate 652, and the lifting plate 652 is slidingly connected to the guide rod 653, so the screw rod 651 drives the lifting plate 652 and the sealing sleeve 655 to rise until the sealing sleeve 655 is separated from the heat sink 5 and other structures, and then the staff can use it through the outlet port 3 and the negative electrode inlet port 8 on the lower box seat 2 and the upper box seat 4. The heat sink 5 can play a role in dissipating heat for the lithium battery assembly 1. When necessary, the staff can start the fan 67 in the mesh tube 66 to speed up the heat dissipation efficiency of the heat sink 5. The small damper 63 and the elastic rubber frame 64 between the inner bottom surface of the support frame 61 and the outer bottom surface of the connecting plate 62 can buffer external vibrations.

[0036] Example 2

[0037] The difference between this embodiment and embodiment 1 is that the auxiliary fixing device 7 includes a bottom box 71, a rotating plate 72, a screw 73, a suction cup 74 and a movable plate 75, the bottom box 71 is installed below the support frame 61, the screw 73 is installed on the bottom box 71 and at a position on one side of the support frame 61 through a thread, the rotating plate 72 is installed above the screw 73, the movable plate 75 is installed below the screw 73 and at a position on the inner side of the bottom box 71 through a bearing, and a plurality of suction cups 74 are installed below the movable plate 75.

[0038] By adopting the above technical solution, the structure can assist in fixing its own position through the cooperation of structures such as the suction cup 74 and the movable plate 75 when needed, so as to better meet the working needs in different situations.

[0039] Specifically, the shape and size of the inner cross section of the bottom box 71 are the same as the shape and size of the outer cross section of the moving plate 75 .

[0040] By adopting the above technical solution, it is ensured that the inner side of the bottom box 71 and the outer side of the movable plate 75 can be closely attached to each other, thereby preventing the movable plate 75 from rotating and deviating, thereby ensuring normal operation.

[0041] When this embodiment is used, when it is necessary to assist in fixing the position of the structure, the rotating plate 72 in the auxiliary fixing device 7 is rotated, thereby driving the screw 73 to rotate. The screw 73 is threadedly connected to the bottom box 71, and the screw 73 is bearing-connected to the movable plate 75. The outer side of the movable plate 75 is in close contact with the bottom box 71, so the screw 73 drives the movable plate 75 to descend until each suction cup 74 is adsorbed on the resting plane, thereby assisting in fixing the position of the structure.

[0042] The structure and principle of the lithium battery assembly 1, the lower box seat 2 and its upper structure, the outlet port 3, the upper box seat 4, the heat sink 5, and the negative electrode inlet port 8 composed of a lithium battery, a fixing frame, a silicone plate, a pole ear, a base and an aluminum-plastic film in the utility model have been disclosed in a soft-package polymer lithium battery pack with an improved structure disclosed in Chinese patent application No. 201922119846.8. The working principle is that the lithium battery is fixed in the fixing frame by the base and the silicone plate. The silicone plate serves as a partition of the lithium battery, so that the lithium batteries can achieve shockproof insulation and heat conduction. The upper box seat and the lower box seat are sealed with rubber to make the lithium battery have good waterproof performance. The upper box seat and the lower box seat are filled with thermal conductive silicone grease. In addition to the sealing function, it can also conduct heat and transfer the temperature of the battery pack to the heat sink. The heat sink is cooled by external air to make the battery pack have good heat dissipation.

[0043] The structure and principle of the small and medium-sized damper 63 of the utility model have been disclosed in a micro-box device for computer network security disclosed in Chinese Patent Application No. 202020567163.9. Its working principle consists of a piston and an oil tank, which is filled with oil. When the object moves, the piston moves in the oil, thereby consuming energy and slowing down the movement of the object.

[0044] The working principle and use process of the utility model: when the structure needs to be used, the knob 654 in the closing component 65 of the buffer closing device 6 is turned, thereby driving the screw rod 651 to rotate, the screw rod 651 is threadedly connected with the lifting plate 652, and the lifting plate 652 is slidably connected with the guide rod 653, so the screw rod 651 drives the lifting plate 652 and the closing sleeve 655 to rise until the closing sleeve 655 is separated from the heat sink 5 and other structures, and then the staff can use it through the outlet 3 and the negative electrode inlet 8 on the lower box seat 2 and the upper box seat 4. The heat sink 5 can play a role in dissipating heat for the lithium battery assembly 1. When necessary, the staff can start The fan 67 in the moving net tube 66 can speed up the heat dissipation efficiency of the heat sink 5. The small damper 63 and the elastic rubber frame 64 between the inner bottom surface of the support frame 61 and the outer bottom surface of the connecting plate 62 can buffer the external vibration. When it is necessary to auxiliary fix the position of the structure, the rotating plate 72 in the auxiliary fixing device 7 is rotated to drive the screw 73 to rotate. The screw 73 is threadedly connected to the bottom box 71, and the screw 73 is bearing-connected to the movable plate 75. The outer side of the movable plate 75 is close to the bottom box 71, so the screw 73 drives the movable plate 75 to descend until each suction cup 74 is adsorbed on the base plane, thereby auxiliary fixing the position of the structure.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft-package polymer lithium battery pack structure, including a lithium battery assembly, characterized in that: A lower box seat is installed above the lithium battery assembly, an upper box seat is installed above the lower box seat, a negative electrode line inlet is arranged between the lower box seat and the upper box seat, a line outlet is arranged between the lower box seat and the upper box seat and at a position located on the side of the negative electrode line inlet, a heat sink is installed above the upper box seat, a buffer sealing device is arranged on the outside of the lithium battery assembly, and an auxiliary fixing device is installed on the outside of the bottom of the buffer sealing device.

2. The soft-package polymer lithium battery pack structure according to claim 1, characterized in that: The buffer sealing device includes a support frame, a connecting plate, a small damper, an elastic rubber frame and a sealing component. A connecting plate is installed below the lithium battery component, a support frame is arranged on the outside of the connecting plate, an elastic rubber frame is installed between the outer bottom surface of the connecting plate and the inner bottom surface of the support frame, a plurality of small dampers are installed between the outer bottom surface of the connecting plate and the inner bottom surface of the support frame and at a position inside the elastic rubber frame, and a sealing component is installed on the connecting plate and at a position outside the heat sink.

3. The soft-package polymer lithium battery pack structure according to claim 2, characterized in that: The buffer sealing device also includes a fan, and the fan is arranged on the support frame and at a position on one side of the heat sink.

4. The soft-package polymer lithium battery pack structure according to claim 3, characterized in that: The buffer sealing device also includes a net cylinder, which is installed between the support frame and the fan and at a position outside the fan.

5. The soft-package polymer lithium battery pack structure according to claim 2, characterized in that: The closing assembly includes a screw, a lifting plate, a knob and a closing sleeve. A screw is installed above the connecting plate and on one side of the lithium battery assembly through a bearing, a knob is installed above the screw, a lifting plate is installed on the outside of the screw through a thread, and a closing sleeve is installed on the lifting plate and on the outside of the heat sink.

6. The soft-package polymer lithium battery pack structure according to claim 5, characterized in that: The closure assembly also includes a guide rod, which is installed on the connecting plate and located at a position on the side of the screw rod away from the lithium battery assembly.

7. The soft-package polymer lithium battery pack structure according to claim 2, characterized in that: The auxiliary fixing device includes a bottom box, a rotating plate, a screw, a suction cup and a movable plate. The bottom box is installed below the support frame, a screw is installed on the bottom box and at a position on one side of the support frame through a thread, a rotating plate is installed above the screw, a movable plate is installed below the screw and at a position inside the bottom box through a bearing, and a plurality of suction cups are installed below the movable plate.

8. The soft-package polymer lithium battery pack structure according to claim 7, characterized in that: The shape and size of the inner cross section of the bottom box are the same as the shape and size of the outer cross section of the movable plate.

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