A power battery with external PTC structure and use method thereof

Abstract

The present invention relates to the technical field of power batteries, and in particular to a power battery with an external PTC structure and a method of using the same. The technical solution includes: a power battery pack, a PTC structure is arranged outside the power battery pack, the PTC structure includes a heat dissipation base plate and an external frame, a PTC thermal conductive silicone gasket is arranged on the upper surface of the heat dissipation base plate and below the power battery pack, a plug-in strip is fixedly connected to the bottom of the external frame, the heat dissipation base plate is provided with a through hole for the plug-in strip to vertically penetrate, and the plug-in strip is fixedly connected by a limiting screw after vertically penetrating the through hole; a positioning strip for centering the PTC thermal conductive silicone gasket is horizontally slidably connected to the upper surface of the heat dissipation base plate. The present invention first assembles the power battery into a power battery pack and then adds external PTC structures such as a PTC thermal conductive silicone gasket and a heat dissipation base plate, so that the external PTC structure and the power battery are independent of each other, which facilitates their independent operation and is more flexible to use.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a power battery with an external PTC structure and a use method thereof. Background Art

[0002] The power battery is the power source that provides power for tools, mostly referring to the batteries that power electric vehicles, electric trains, electric bicycles, and golf carts.

[0003] The power battery is composed of multiple batteries to form a battery pack. A thermal conductive silicone gasket is installed under the battery pack to conduct heat. This built-in connection method that directly contacts each battery of the battery pack with the gasket not only affects the flexible disassembly and assembly of the gasket, but also makes it difficult to handle the battery pack separately. To this end, the present invention proposes a power battery with an external PTC structure and a method of use. The external connection method makes it easier for the PTC thermal conductive silicone gasket and the battery pack to operate independently. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the background technology and to provide a power battery with an external PTC structure and a method of using the same.

[0005] The technical solution of the present invention is as follows: a power battery with an external PTC structure and a method of using the power battery pack, comprising a power battery pack, a PTC structure being arranged on the outside of the power battery pack, the PTC structure comprising a heat dissipation base plate and an external frame, a PTC thermal conductive silicone gasket being arranged on the upper surface of the heat dissipation base plate and located below the power battery pack, an insertion strip being fixedly connected to the bottom of the external frame, the heat dissipation base plate being provided with a through hole for the insertion strip to vertically penetrate, and the insertion strip being fixedly connected by a limiting screw after vertically penetrating the through hole; a positioning strip for centering the PTC thermal conductive silicone gasket being horizontally slidably connected to the upper surface of the heat dissipation base plate, the positioning strip comprising two opposite first positioning strips and two opposite second positioning strips.

[0006] Preferably, the heat dissipation base plate is provided with a first positioning component for adjusting the distance between the two first positioning strips, the first positioning component includes a first screw shaft rotatably connected to the inside of the heat dissipation base plate, the bottom of the first positioning strip is fixedly connected with a first screw sleeve, and the first screw sleeve is spirally sleeved with the first screw shaft.

[0007] Preferably, a first slide groove is formed on the upper surface of the heat dissipation base plate, and a first sliding block matching the first slide groove is fixedly connected to the lower surface of the first positioning strip.

[0008] Preferably, the heat dissipation base plate is provided with a second positioning assembly for adjusting the distance between the two second positioning strips, the second positioning assembly includes a pair of second screw shafts rotatably connected to the inside of the heat dissipation base plate, the bottom of the second positioning strip is fixedly connected with a second screw sleeve, the second screw sleeve is spirally sleeved with one end of a single second screw shaft at a corresponding position, the other end of the second screw shaft is fixedly connected with a gear A, and the bottom of the heat dissipation base plate is rotatably connected with a gear coupling that can mesh with gear A.

[0009] Preferably, the gear coupling includes two gears B rotatably connected to the heat dissipation base plate via a rotating shaft and a connecting shaft that fixedly connects the two gears B, and the two gears B are respectively meshed and connected with gears A at corresponding positions.

[0010] Preferably, a rotation groove for the connecting shaft to rotate and snap into is opened on the lower surface of the heat dissipation base plate, so as to provide a larger rotation angle for the gear connecting shaft, so that the second positioning strip can translate a greater distance.

[0011] Preferably, a second slide groove is formed on the upper surface of the heat dissipation base plate, and a second sliding block matching the second slide groove is fixedly connected to the lower surface of the second positioning strip.

[0012] Preferably, a positioning convex strip is fixedly connected to the bottom of the external frame, and a positioning groove into which the positioning convex strip can be vertically inserted is formed on the upper surface of the heat dissipation base plate.

[0013] Preferably, each vertical plate of the external frame is provided with a plurality of heat dissipation holes near the lower edge.

[0014] A method for using a power battery with an external PTC structure, wherein a single power battery is first assembled in a shell to form an integrated power battery pack, a cavity is reserved at the bottom of the shell to contact the PTC thermal conductive silicone gasket, and the generated heat is transmitted outward via the PTC thermal conductive silicone gasket and the heat dissipation base plate, and finally an external frame is assembled on the heat dissipation base plate to complete the external packaging of the power battery pack, and a terminal post is arranged on the external frame, and the terminal post is electrically connected to the internal power battery pack; this external connection method of the PTC structure makes the power battery pack and the PTC structure independent of each other, and is more flexible to use.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] (1): This application first assembles the power battery into a power battery pack and then adds external PTC structures such as PTC thermal conductive silicone gaskets and heat dissipation base plates, so that the external PTC structure and the power battery are independent of each other, which facilitates their independent operation and is more flexible to use;

[0017] (2): Through the design of the positioning strip, the present application can position the PTC thermal conductive silicone gasket and the power battery pack thereon, thereby facilitating the assembly between the power battery pack and the external PTC structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a power battery with an external PTC structure and a method of using the battery;

[0019] Figure 2 for Figure 1 Schematic diagram of the separated structure;

[0020] Figure 3 This is a connection diagram of the PTC thermal conductive silicone gasket, heat dissipation base plate and positioning strip;

[0021] Figure 4 It is a schematic diagram of the connection between the positioning strip and the heat dissipation base plate;

[0022] Figure 5 is a schematic diagram of the connection between the first positioning component, the second positioning component and the positioning bar;

[0023] Figure 6 Schematic diagram of the bottom of the heat dissipation base plate.

[0024] Reference numerals: 1. power battery pack;

[0025] 2. PTC structure;

[0026] 21. heat dissipation bottom plate; 211. through hole; 212. rotation groove; 213. positioning groove;

[0027] 22, external frame; 221, insert strip; 2211, limit through hole; 222, positioning convex strip; 223, heat dissipation hole;

[0028] 23. PTC thermal conductive silicone gasket;

[0029] 24. Limit screw pin;

[0030] 25, positioning bar; 251, first positioning bar; 252, second positioning bar;

[0031] 26, first positioning assembly; 261, first screw shaft; 262, first screw sleeve; 263, first slider; 264, first slide groove;

[0032] 27, second positioning assembly; 271, second screw shaft; 272, second screw sleeve; 273, second slider; 274, second slide groove; 275, gear A; 276, gear connecting shaft; 2761, rotating shaft; 2762, gear B; 2763, connecting shaft. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Embodiment 1

[0035] like Figure 1-2 As shown, a power battery with an external PTC structure proposed by the present invention includes a power battery pack 1. A PTC structure 2 is arranged outside the power battery pack 1, and the PTC structure 2 includes a heat dissipation bottom plate 21 and an external frame 22. The heat dissipation bottom plate 21 is made of an aluminum plate, and a heat pipe is installed on the upper surface of the aluminum plate, which can conduct heat well. A PTC thermal conductive silicone gasket 23 is provided on the upper surface of the heat dissipation base plate 21 and below the power battery pack 1. An insertion strip 221 is integrally fixedly connected to the four corners of the bottom of the external frame 22. The heat dissipation base plate 21 is provided with a through hole 211 for the insertion strip 221 to vertically penetrate. The insertion strip 221 is provided with a limiting through hole 2211. After the insertion strip 221 vertically penetrates the through hole 211, the limiting screw 24 moves horizontally through the horizontal threaded hole provided on the heat dissipation base plate 21 to be inserted into the corresponding limiting through hole 2211, thereby limiting the external frame 22 on the heat dissipation base plate 21; a positioning convex strip 222 is integrally fixedly connected to the bottom of the external frame 22, and a positioning groove 213 is provided on the upper surface of the heat dissipation base plate 21 for the positioning convex strip 222 to be vertically inserted, and the positioning groove 213 and the positioning convex strip 222 are both frame-shaped structures. Each vertical plate of the external frame 22 is provided with a plurality of heat dissipation holes 223 near the bottom edge to enhance the heat dissipation effect of the device.

[0036] The working principle of this embodiment is as follows: first, a single power battery is assembled in a shell to form an integral power battery pack 1, a cavity is left at the bottom of the shell to contact with the PTC thermal conductive silicone gasket 23, and the generated heat is transmitted outward through the PTC thermal conductive silicone gasket 23 and the heat dissipation base plate 21, and finally, an external frame 22 is assembled on the heat dissipation base plate 21 to complete the external packaging of the power battery pack 1, and a terminal is provided on the external frame 22, and the terminal is electrically connected to the internal power battery pack 1; this external connection mode of the PTC structure makes the power battery pack 1 and the PTC structure independent of each other, and the use is more flexible;

[0037] The process of assembling the external frame 22 is as follows: Figure 1-2 As shown, it is placed downward on the heat dissipation base plate 21, and the positioning convex strip 222 is inserted into the positioning groove 213. At the same time, the insert strip 221 passes through the corresponding through hole 211, and then the limiting screw pin 24 is rotated. The limiting screw pin 24 is translated through the spiral connection with the threaded hole on the heat dissipation base plate 21 to pass through the corresponding limiting through hole 2211, and the external frame 22 is limited on the heat dissipation base plate 21.

[0038] Embodiment 2

[0039] The present invention proposes a power battery with an external PTC structure, including a power battery pack 1, a PTC structure 2 is arranged outside the power battery pack 1, the PTC structure 2 includes a heat dissipation base plate 21 and an external frame 22, a PTC thermal conductive silicone gasket 23 is arranged on the upper surface of the heat dissipation base plate 21 and below the power battery pack 1, and an insertion strip 221 is integrally fixedly connected to each of the four corners of the bottom of the external frame 22, the heat dissipation base plate 21 is provided with a through hole 211 for the insertion strip 221 to vertically penetrate, and the insertion strip 221 is provided with a After the insertion strip 221 vertically penetrates the through hole 211, the limiting screw pin 24 moves horizontally through the horizontal threaded hole opened on the heat dissipation base plate 21 to be inserted into the corresponding limiting through hole 2211, thereby limiting the external frame 22 on the heat dissipation base plate 21; the bottom of the external frame 22 is integrally connected with a positioning convex strip 222, and the upper surface of the heat dissipation base plate 21 is provided with a positioning groove 213 into which the positioning convex strip 222 can be vertically inserted, and the positioning groove 213 and the positioning convex strip 222 are both frame-shaped structures. Multiple heat dissipation holes 223 are provided near the lower edge of each vertical plate of the external frame 22 to increase the heat dissipation effect of the device.

[0040] Compared with the first embodiment, this embodiment further includes:

[0041] like Figure 3-4 As shown, the upper surface of the heat dissipation base plate 21 is horizontally slidably connected with a positioning bar 25 for centering the PTC thermal conductive silicone gasket 23 , and the positioning bar 25 includes two opposite first positioning bars 251 and two opposite second positioning bars 252 .

[0042] like Figure 4-5 As shown, the heat dissipation base plate 21 is provided with a first positioning assembly 26 for adjusting the distance between the two first positioning strips 251, and the first positioning assembly 26 includes a first screw shaft 261 rotatably connected to the inside of the heat dissipation base plate 21, and a first screw sleeve 262 is fixedly connected to the bottom of the first positioning strip 251, and the first screw sleeve 262 is spirally sleeved with the end of the first screw shaft 261. A first slide groove 264 is provided on the upper surface of the heat dissipation base plate 21, and a first slider 263 matching the first slide groove 264 is fixedly connected to the lower surface of the first positioning strip 251.

[0043] like Figure 4-6As shown, the heat dissipation base plate 21 is provided with a second positioning assembly 27 for adjusting the spacing between the two second positioning strips 252, the second positioning assembly 27 includes a pair of second screw shafts 271 rotatably connected to the inside of the heat dissipation base plate 21, the bottom of the second positioning strip 252 is fixedly connected with a second screw sleeve 272, the second screw sleeve 272 is spirally sleeved with one end of a single second screw shaft 271 at a corresponding position, the other end of the second screw shaft 271 is fixedly connected with a gear A275, and the bottom of the heat dissipation base plate 21 is rotatably connected with a gear coupling 276 that can be meshed with the gear A275. The gear coupling 276 includes two gears B2762 rotatably connected to the heat dissipation base plate 21 through a rotating shaft 2761 and a connecting shaft 2763 that fixes the two gears B2762 together, and the two gears B2762 are respectively meshed with the gears A275 at the corresponding positions. The lower surface of the heat dissipation base plate 21 is provided with a rotation groove 212 for the connection shaft 2763 to rotate and engage, so as to provide a larger rotation angle of the gear connecting shaft 276, so that the second positioning bar 252 can translate a greater distance. The upper surface of the heat dissipation base plate 21 is provided with a second slide groove 274, and the lower surface of the second positioning bar 252 is fixedly connected with a second slider 273 matching the second slide groove 274.

[0044] The working principle of this embodiment is as follows: the PTC thermal conductive silicone gasket 23 and the power battery pack 1 thereon can be positioned at the center of the heat dissipation base plate 21 by means of the first positioning bar 251 and the second positioning bar 252, so as to facilitate assembly; the first positioning assembly 26 and the second positioning assembly 27 can respectively realize the translation of the first positioning bar 251 and the second positioning bar 252;

[0045] Specifically, Figure 5 As shown, by rotating the first screw shaft 261, the first screw shaft 261 can drive the two first positioning bars 251 to move in opposite directions to adjust the distance through the spiral connection between the first screw shaft 261 and the first screw sleeve 262;

[0046] like Figure 5-6 As shown, one of the second screw shafts 271 is rotated, and the second screw shaft 271 drives a single second positioning bar 252 to translate through the spiral connection between the second screw shaft 271 and the second screw sleeve 272. At the same time, the gear A275 at the end of the second screw shaft 271 drives the entire gear coupling 276 to rotate through the meshing connection with one of the gears B2762, and then drives the other second screw shaft 271 to rotate through the meshing connection between another gear B2762 and the gear A275 at the corresponding position, so as to drive the other second positioning bar 252 to translate.

[0047] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A power battery with an external PTC structure, comprising a power battery pack (1), characterized in that: A PTC structure (2) is arranged outside the power battery pack (1), the PTC structure (2) comprising a heat dissipation base plate (21) and an external frame (22), a PTC heat-conducting silicone gasket (23) is arranged on the upper surface of the heat dissipation base plate (21) and below the power battery pack (1), an insertion strip (221) is fixedly connected to the bottom of the external frame (22), the heat dissipation base plate (21) is provided with a through hole (211) for the insertion strip (221) to vertically penetrate, and the insertion strip (221) is fixedly connected through the through hole (211) after vertically penetrating the through hole (211); a positioning strip (25) for centering the PTC heat-conducting silicone gasket (23) is horizontally slidably connected to the upper surface of the heat dissipation base plate (21), the positioning strip (25) comprising two opposite first positioning strips (251) and two opposite second positioning strips (252); The heat dissipation base plate (21) is provided with a first positioning component (26) for adjusting the distance between the two first positioning strips (251), the first positioning component (26) comprising a first screw shaft (261) rotatably connected inside the heat dissipation base plate (21), a first screw sleeve (262) is fixedly connected to the bottom of the first positioning strip (251), and the first screw sleeve (262) is spirally sleeved with the first screw shaft (261); The heat dissipation base plate (21) is provided with a second positioning assembly (27) for adjusting the distance between the two second positioning strips (252), the second positioning assembly (27) comprising a pair of second screw shafts (271) rotatably connected inside the heat dissipation base plate (21), the bottom of the second positioning strip (252) is fixedly connected with a second screw sleeve (272), the second screw sleeve (272) is spirally sleeved with one end of a single second screw shaft (271) at a corresponding position, the other end of the second screw shaft (271) is fixedly connected with a gear A (275), and the bottom of the heat dissipation base plate (21) is rotatably connected with a gear shaft (276) that can mesh with the gear A (275); The gear coupling (276) comprises two gears B (2762) rotatably connected to the heat dissipation base plate (21) via a rotating shaft (2761) and a connecting shaft (2763) fixedly connecting the two gears B (2762), and the two gears B (2762) are respectively meshed and connected with the gears A (275) at corresponding positions; The lower surface of the heat dissipation bottom plate (21) is provided with a rotation groove (212) for the connection shaft (2763) to be rotated and inserted into, so as to provide the gear connection shaft (276) with a larger rotation angle, so that the second positioning bar (252) can translate a greater distance; A second slide groove (274) is provided on the upper surface of the heat dissipation base plate (21), and a second sliding block (273) matching the second slide groove (274) is fixedly connected to the lower surface of the second positioning strip (252).

2. A power battery with an external PTC structure according to claim 1, characterized in that: The upper surface of the heat dissipation base plate (21) is provided with a first sliding groove (264), and the lower surface of the first positioning strip (251) is fixedly connected with a first sliding block (263) matching the first sliding groove (264).

3. The power battery with an external PTC structure according to claim 1, characterized in that: A positioning convex strip (222) is fixedly connected to the bottom of the external frame (22), and a positioning groove (213) is provided on the upper surface of the heat dissipation base plate (21) into which the positioning convex strip (222) can be vertically inserted.

4. The power battery with an external PTC structure according to claim 1, characterized in that: Each vertical plate of the external frame (22) is provided with a plurality of heat dissipation holes (223) near the lower edge.

5. A method for using a power battery with an external PTC structure according to claims 1-4, characterized in that: First, a single power battery is assembled in a shell to form an integrated power battery pack (1), a cavity is left at the bottom of the shell to contact a PTC thermal conductive silicone gasket (23), and the generated heat is transmitted outward through the PTC thermal conductive silicone gasket (23) and the heat dissipation base plate (21), and finally an external frame (22) is assembled on the heat dissipation base plate (21) to complete the external packaging of the power battery pack (1), and a terminal is arranged on the external frame (22), and the terminal is electrically connected to the internal power battery pack (1); this connection method of the external PTC structure makes the power battery pack (1) and the PTC structure independent of each other, and is more flexible to use.

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