Battery pack box body with heat insulation and heat preservation functions

Abstract

The invention discloses a battery pack box body with heat insulation and heat preservation functions, which comprises a battery box outer shell, a battery box inner shell and an electromagnetic relay, and the battery box inner shell and the electromagnetic relay are fixedly arranged in the battery box outer shell. First heat exchange plates which are uniformly distributed are integrally formed on the inner side of the battery box outer shell and the outer side of the battery box inner shell, and second heat exchange plates which are uniformly distributed are arranged in a gap between the battery box outer shell and the battery box inner shell. According to the invention, when the battery pack is in a working state, the first heat exchange plate is in contact with the second heat exchange plate, high heat generated by working of the battery pack can be dissipated outwards, and when the battery pack is in a placement state, the first heat exchange plate is separated from the second heat exchange plate, and residual heat generated by working of the battery pack is stored in the battery box inner shell; and the heat transfer effect between the battery box outer shell and the battery box inner shell is poor, so that a good heat insulation effect is achieved, and a suitable storage environment of the battery pack is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack boxes, and more particularly to a battery pack box with heat insulation functions. Background Art

[0002] Too high or too low a temperature of the battery case will have a negative impact on the life of the battery. Take lithium-ion batteries as an example. In a high temperature environment, the electrolyte inside the battery will decompose faster, causing the battery capacity to decay faster; in a low temperature environment, the electrode material inside the battery may shrink and expand, causing damage to the internal structure of the battery and shortening the battery life. Thermal insulation can prevent the battery pack from working in extreme temperature environments and extend the battery life. For example, in electric vehicles, the battery life can be extended by several years by designing a good thermal insulation design for the battery case.

[0003] At present, in order to ensure the thermal insulation effect of the battery box, the thermal insulation effect of the box is often unilaterally improved. However, it is ignored that the battery itself will generate a lot of heat during normal operation. Due to the thermal insulation function of the box, the heat of the battery pack cannot be dissipated. The battery works in a high temperature environment for a long time, which accelerates the battery capacity decay and reduces the battery life. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a battery pack box with heat insulation function to solve the background technology problems.

[0005] To achieve the above object, the present invention adopts the following technical solution: A battery pack box with heat insulation function comprises a battery box outer shell, a battery box inner shell fixedly installed inside the battery box outer shell, and an electromagnetic relay, there is a gap between the battery box outer shell and the battery box inner shell, the inner side of the battery box outer shell and the outer side of the battery box inner shell are both integrally formed with uniformly distributed first heat exchange plates, and the gap between the battery box outer shell and the battery box inner shell is provided with uniformly distributed second heat exchange plates, both sides of the second heat exchange plates are respectively in contact with the adjacent first heat exchange plates on the battery box outer shell and the battery box inner shell, a synchronization plate is provided at the bottom of the battery box outer shell, uniformly distributed pull rods are fixedly installed on the top of the synchronization plate, the second heat exchange plates are connected to adjacent pull rods, an electric push rod is fixedly installed between the synchronization plate and the battery box outer shell, the normally open contact of the electromagnetic relay is electrically connected to the electric push rod through a wire, and the electromagnetic coil of the electromagnetic relay is installed at the negative end of the battery pack in one of a series connection and a parallel connection.

[0006] As a further description of the above technical solution: The sides of the first heat exchange plate and the second heat exchange plate that are close to each other are both arranged as inclined surfaces that match each other, and the inclined surfaces of the first heat exchange plate and the second heat exchange plate are both arranged smoothly.

[0007] As a further description of the above technical solution: The second heat exchange plate is provided with a connecting groove, and the pull rod is integrally formed with connecting balls arranged at equal distances. The connecting balls are located at the inner side of the connecting groove and are in smooth contact with the inner wall of the connecting groove.

[0008] As a further description of the above technical solution: The first heat exchange plate and the second heat exchange plate at the four corners of the battery box outer shell and the battery box inner shell are both L-shaped. A triangular plate is fixedly installed at the bottom of the L-shaped second heat exchange plate, and the triangular plate is fixedly connected to the adjacent battery box outer shell or battery box inner shell.

[0009] As a further description of the above technical solution: The battery box outer shell, the battery box inner shell, the first heat exchange plate and the second heat exchange plate are all made of metal, and a heat insulation plate is fixedly connected between the battery box outer shell and the battery box inner shell.

[0010] As a further description of the above technical solution: The gap between the battery box outer shell and the battery box inner shell is evacuated to a vacuum.

[0011] As a further description of the above technical solution: A sliding tube is integrally formed on the inner side of the battery box shell, and the pull rod is slidably installed on the inner side of the sliding tube. The pull rod is in smooth and close contact with the inner wall of the sliding tube.

[0012] As a further description of the above technical solution: A power source is connected in series in the normally open contact circuit of the electromagnetic relay.

[0013] Compared with the prior art, the advantages of the present invention are: In this solution, when the battery pack is in working condition, the first heat exchange plate is in contact with the second heat exchange plate, and the high heat generated by the battery pack can be dissipated to the outside. When the battery pack is in a placed state, the first heat exchange plate is separated from the second heat exchange plate, and the residual heat from the battery pack is stored in the inner shell of the battery box. The heat transfer effect between the outer shell of the battery box and the inner shell of the battery box is poor, thereby achieving a good heat insulation effect to ensure a suitable storage environment for the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view cross-sectional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the connection structure between the second heat exchange plate and the tie rod of the present invention; Figure 3 This is a schematic diagram of the structure of the first heat exchange plate at the four corners of the inner side of the battery box shell of the present invention; Figure 4 The figure is a circuit diagram of the working principle of the electric push rod of the present invention.

[0015] Description of the numbers in the figure: 1. Battery box shell; 11. Sliding tube; 2. Battery box inner shell; 3. First heat exchange plate; 4. Second heat exchange plate; 41. Connecting groove; 5. Synchronous plate; 6. Pull rod; 61. Connecting ball; 7. Electric push rod; 8. Electromagnetic relay; 9. Heat insulation plate; 10. Triangle plate. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0017] See also Figure 1-4 In the present invention, a battery pack box with heat insulation function includes a battery box shell 1, a battery box inner shell 2 fixedly installed inside the battery box shell 1, and an electromagnetic relay 8. There is a gap between the battery box shell 1 and the battery box inner shell 2. The inner side of the battery box shell 1 and the outer side of the battery box inner shell 2 are integrally formed with uniformly distributed first heat exchange plates 3. Uniformly distributed second heat exchange plates 4 are arranged in the gap between the battery box shell 1 and the battery box inner shell 2. Both sides of the second heat exchange plates 4 are respectively in contact with the adjacent first heat exchange plates 3 on the battery box shell 1 and the battery box inner shell 2. A synchronization plate 5 is arranged at the bottom of the battery box shell 1. Uniformly distributed pull rods 6 are fixedly installed on the top of the synchronization plate 5. The second heat exchange plates 4 are all connected to the adjacent pull rods 6. An electric push rod 7 is fixedly installed between the synchronization plate 5 and the battery box shell 1. The normally open contact of the electromagnetic relay 8 is electrically connected to the electric push rod 7 through a wire. The electromagnetic coil of the electromagnetic relay 8 is installed at the negative end of the battery pack in either a series connection or a parallel connection.

[0018] In the present invention, by installing the battery pack on the inner side of the battery box inner shell 2, when the battery is placed normally and needs to be isolated from the influence of external extreme weather on the battery pack, the electric push rod 7 is normally shortened, and the pull rod 6 is at the upper end at this time. The second heat exchange plate 4 and the first heat exchange plate 3 are in a separated state, and there is no good heat conductive medium between the battery box outer shell 1 and the battery box inner shell 2. The temperature of the external environment of the battery box outer shell 1 cannot directly affect the battery pack in the battery box inner shell 2. When the battery needs to work, it also means that the positive and negative electrodes of the battery form a path. At this time, current appears at the negative end of the battery pack, and the current flows through the electromagnetic coil of the electromagnetic relay 8 to generate magnetism, which adsorbs the contacts of the electromagnetic relay 8 to close. , let the electric push rod 7 be energized to work, the electric push rod 7 pushes the synchronous plate 5 to move downward, driving the pull rod 6 and the second heat exchange plate 4 on it to move downward, so that the second heat exchange plate 4 contacts the first heat exchange plate 3 at its bottom, and the battery box outer shell 1 and the battery box inner shell 2 are used as heat exchange media to perform heat exchange work, which is convenient for the heat dissipation of the battery pack, ensures the timely dissipation of heat when the battery pack is in a working state, and prolongs the service life of the battery pack. It can selectively change the thermal insulation effect of the battery pack box according to the working state of the battery pack, which not only ensures the power of the battery pack but also avoids the accelerated attenuation of the battery pack life, and has good practicality and functionality.

[0019] See also Figure 1-3 , wherein: the sides of the first heat exchange plate 3 and the second heat exchange plate 4 that are close to each other are both set as inclined surfaces that match each other, and the inclined surfaces of the first heat exchange plate 3 and the second heat exchange plate 4 are both set smoothly.

[0020] In the present invention, the first heat exchange plate 3 and the second heat exchange plate 4 are arranged with inclined surfaces, so that the contact surface between the first heat exchange plate 3 and the second heat exchange plate 4 is increased as much as possible, thereby improving the efficiency of heat transfer between the two and improving the heat dissipation effect of the battery pack when working.

[0021] See also Figure 2 , wherein: a connecting groove 41 is opened on the second heat exchange plate 4, and connecting balls 61 arranged at equal distances are integrally formed on the pull rod 6. The connecting balls 61 are located on the inner side of the connecting groove 41 and are in smooth contact with the inner wall of the connecting groove 41.

[0022] In the present invention, by connecting the through groove 41 and the connecting ball 61, the second heat exchange plate 4 has a certain deflection angle on the pull rod 6. When the first heat exchange plate 3 and the second heat exchange plate 4 are tilted and deformed, the second heat exchange plate 4 can still be in contact with the first heat exchange plates 3 on both sides at the same time, thereby ensuring the heat exchange process.

[0023] See also Figure 3, wherein: the first heat exchange plate 3 and the second heat exchange plate 4 located at the four corners of the battery box outer shell 1 and the battery box inner shell 2 are both L-shaped. A triangular plate 10 is fixedly installed at the bottom of the L-shaped second heat exchange plate 4, and the triangular plate 10 is fixedly connected to the adjacent battery box outer shell 1 or battery box inner shell 2.

[0024] In the present invention, the four-corner L-shaped first heat exchange plate 3 and the second heat exchange plate 4 can stabilize the box structure of the battery box outer shell 1 and the battery box inner shell 2, and the triangular plate 10 further assists the first heat exchange plate 3 and the second heat exchange plate 4 to improve the structural strength of the battery box outer shell 1 and the battery box inner shell 2.

[0025] See also Figure 1 , wherein: the battery box outer shell 1, the battery box inner shell 2, the first heat exchange plate 3 and the second heat exchange plate 4 are all made of metal, and a heat insulation plate 9 is fixedly connected between the battery box outer shell 1 and the battery box inner shell 2.

[0026] In the present invention, metal has good thermal conductivity. The battery box outer shell 1, the battery box inner shell 2, the first heat exchange plate 3 and the second heat exchange plate 4 made of metal facilitate heat transfer and heat dissipation. When the first heat exchange plate 3 and the second heat exchange plate 4 are separated, the battery box outer shell 1 and the battery box inner shell 2 are connected only by the insulation plate 9, thereby improving the thermal insulation function of the box.

[0027] See also Figure 1 , wherein: the gap between the battery box outer shell 1 and the battery box inner shell 2 is evacuated to a vacuum.

[0028] In the present invention, the air in the gap between the battery box outer shell 1 and the battery box inner shell 2 is extracted to further reduce the presence of heat exchange medium, thereby improving the thermal insulation effect of the box when thermal insulation is required.

[0029] See also Figure 1 , wherein: a sliding tube 11 is integrally formed on the inner side of the battery box housing 1 , the pull rod 6 is slidably installed on the inner side of the sliding tube 11 , and the pull rod 6 is in smooth and close contact with the inner wall of the sliding tube 11 .

[0030] In the present invention, the tie rod 6 and the sliding tube 11 cooperate to further seal the space between the tie rod 6 and the battery box outer shell 1, thereby maintaining a vacuum state between the battery box outer shell 1 and the battery box inner shell 2.

[0031] See also Figure 4 , wherein: a power supply is connected in series in the normally open contact circuit of the electromagnetic relay 8.

[0032] In the present invention, the power source is used as the power source of the electric push rod 7 to supply the electric push rod 7 with power to work, and a battery pack can be used as the power source depending on the situation.

[0033] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A battery pack box with heat insulation function, comprising a battery box outer shell (1), a battery box inner shell (2) fixedly mounted inside the battery box outer shell (1), and an electromagnetic relay (8), characterized in that: There is a gap between the battery box outer shell (1) and the battery box inner shell (2); the inner side of the battery box outer shell (1) and the outer side of the battery box inner shell (2) are integrally formed with uniformly distributed first heat exchange plates (3); a uniformly distributed second heat exchange plate (4) is arranged in the gap between the battery box outer shell (1) and the battery box inner shell (2); the two sides of the second heat exchange plate (4) are respectively in contact with the adjacent first heat exchange plates (3) on the battery box outer shell (1) and the battery box inner shell (2); a synchronization plate (5) is arranged at the bottom of the battery box outer shell (1); uniformly distributed pull rods (6) are fixedly installed on the top of the synchronization plate (5); the second heat exchange plates (4) are connected to adjacent pull rods (6); an electric push rod (7) is fixedly installed between the synchronization plate (5) and the battery box outer shell (1); the normally open contact of the electromagnetic relay (8) is electrically connected to the electric push rod (7) through a wire; the electromagnetic coil of the electromagnetic relay (8) is installed at the negative terminal of the battery pack in either a series connection or a parallel connection.

2. The battery pack box with heat insulation function according to claim 1, characterized in that: The sides of the first heat exchange plate (3) and the second heat exchange plate (4) that are close to each other are both arranged as mutually matching inclined surfaces, and the inclined surfaces of the first heat exchange plate (3) and the second heat exchange plate (4) are both arranged to be smooth.

3. The battery pack box with heat insulation function according to claim 1, characterized in that: The second heat exchange plate (4) is provided with a connecting groove (41), and the tie rod (6) is integrally formed with connecting balls (61) arranged at equal distances, and the connecting balls (61) are located on the inner side of the connecting groove (41) and are in smooth contact with the inner wall of the connecting groove (41).

4. The battery pack box with heat insulation function according to claim 1, characterized in that: The first heat exchange plate (3) and the second heat exchange plate (4) located at the four corners of the battery box outer shell (1) and the battery box inner shell (2) are both L-shaped. A triangular plate (10) is fixedly mounted on the bottom of each L-shaped second heat exchange plate (4), and the triangular plate (10) is fixedly connected to the adjacent battery box outer shell (1) or battery box inner shell (2).

5. The battery pack box with heat insulation function according to claim 1, characterized in that: The battery box outer shell (1), the battery box inner shell (2), the first heat exchange plate (3) and the second heat exchange plate (4) are all made of metal, and a heat insulation plate (9) is fixedly connected between the battery box outer shell (1) and the battery box inner shell (2).

6. The battery pack box with heat insulation function according to claim 1, characterized in that: The gap between the battery box outer shell (1) and the battery box inner shell (2) is evacuated to a vacuum.

7. The battery pack box with heat insulation function according to claim 1, characterized in that: A sliding tube (11) is integrally formed on the inner side of the battery box housing (1), and the pull rod (6) is slidably mounted on the inner side of the sliding tube (11), with the pull rod (6) being in smooth and tight contact with the inner wall of the sliding tube (11).

8. The battery pack box with heat insulation function according to claim 1, characterized in that: A power source is connected in series in the normally open contact circuit of the electromagnetic relay (8).

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