Power battery pack with anti-condensation effect

Abstract

The utility model relates to the technical field of power battery packs, in particular to a power battery pack with an anti-condensation effect, which comprises a battery box and a plurality of battery modules mounted in the battery box, an insulated top cover is mounted above the battery modules, and the outer surface of the top cover is an arc-shaped surface; a cavity is formed between the battery module and the battery box, and the cavity is filled with a moisture absorption sheet; the anti-condensation effect is improved, and the risks of short circuit and electric leakage caused by the fact that electricity-related parts make contact with water drops are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a power battery pack with an anti-condensation effect. Background Art

[0002] With the continuous development of new energy technology, new energy batteries are widely used, especially new energy power batteries. During the use of power batteries, their charge and discharge currents are large, so their reliable electrical environment is very important. Once leakage occurs, it may cause safety accidents.

[0003] The battery pack of a power battery is often installed on power equipment. For example, when used in engineering equipment, it is easily affected by the external environment in outdoor scenes. Due to the presence of moisture in the air, condensation may form at low temperatures.

[0004] The main factor causing condensation is that water vapor in the air liquefies when it comes into contact with an object whose temperature is lower than the dew point. The specific phenomena causing condensation include:

[0005] 1. The air contains a certain amount of water vapor, and the content is affected by the current temperature. The higher the temperature, the greater the water vapor content (i.e. absolute humidity) the air can hold.

[0006] 2. At night or on rainy days, the temperature of the ground and objects near the ground will drop due to radiation cooling. When the temperature of the surface of these objects drops to a certain level, making its temperature lower than the dew point temperature of the surrounding air (dew point temperature refers to the temperature at which the water vapor in the air reaches saturation and begins to condense into liquid water under a certain air pressure. When the ambient temperature is lower than the dew point temperature, condensation will occur), the water vapor in the air will condense into small water droplets on the low temperature surface, forming dewdrops.

[0007] When condensation gathers to a certain extent, it will form water droplets. If the water droplets fall onto the electrical parts of the battery pack, it may cause risks such as short circuit and leakage. Therefore, the electrical parts of the battery pack need to be condensation-proof to improve the safety of the battery pack. Utility Model Content

[0008] 1. Technical issues

[0009] The utility model aims to provide a power battery pack with anti-condensation effect, so as to solve the problem of condensation generated in the electrical parts inside the battery pack.

[0010] (II) Technical solution

[0011] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0012] A power battery pack with anti-condensation effect comprises a battery box and a plurality of battery modules installed in the battery box, an insulating top cover is installed above the battery module, and the outer surface of the top cover is an arc-shaped surface; a cavity is formed between the battery module and the battery box, and the cavity is filled with a moisture-absorbing sheet.

[0013] Preferably, the number of the top cover is at least one, and a first guide groove and a second guide groove are respectively provided on both sides along the width direction of the top cover, and the opening directions of the first guide groove and the second guide groove are opposite.

[0014] Preferably, the first guide groove and the second guide groove of two adjacent top covers are buckled together.

[0015] Preferably, two side portions along the length direction of the top cover are respectively provided with outwardly extending guide portions.

[0016] Preferably, the top cover is made of soft insulating material.

[0017] Preferably, the battery box includes a lower box body and an upper cover, the opening edge of the lower box body is provided with a bending portion folded inward, and the edge of the bending portion is bent upward to form a stop portion; the upper cover is provided with a positioning portion cooperating with the stop portion, and a sealing edge cooperating with the bending portion; a first sealing gasket is provided between the bending portion and the sealing edge, and the first sealing gasket is sleeved on the stop portion; the sealing edge and the bending portion are locked by a plurality of fasteners.

[0018] Preferably, a maintenance window is provided on the battery box, and a protrusion extending outward from the maintenance window is also provided on the battery box; an inspection cover is covered on the protrusion, a second sealing gasket is provided between the protrusion and the inspection cover, and the inspection cover and the protrusion are locked by a plurality of fasteners.

[0019] Preferably, a mounting frame is provided in the battery box, a circuit board is mounted on the mounting frame, and a surface of the circuit board is coated with a waterproof material layer.

[0020] Preferably, a plug-in connector is integrated on the circuit board, and a plug-in end of the plug-in connector is arranged downward.

[0021] Preferably, a plug-in connector is integrated on the circuit board, a plug-in end of the plug-in connector is arranged upward, and a protective cap or a protective cover is provided on the plug-in end of the plug-in connector.

[0022] (III) Beneficial effects

[0023] The battery module is covered by a battery box with a sealing function, so that water droplets formed by external condensation will not enter the battery box, thereby preventing condensation on the outside; at the same time, by arranging a top cover on the battery module and designing the outer surface of the top cover as an arc surface, after condensation occurs, the collected water droplets can flow along the arc surface to both sides, and avoid falling directly onto the battery module, effectively preventing the electrical parts from contacting the water droplets; by filling a moisture-absorbing sheet in the cavity between the battery box and the battery module, the water droplets flowing to both sides can be effectively adsorbed, further preventing the electrical parts from contacting the water droplets;

[0024] Thereby, the anti-condensation effect of the entire power battery pack is improved and the safety performance of use is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the battery module in the embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of the top cover in the embodiment of the utility model from a first viewing angle;

[0028] Figure 4 A schematic diagram of the third perspective structure of the top cover in the embodiment of the utility model;

[0029] Figure 5 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0030] exist Figures 1 to 5 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0031] Battery box 1, battery module 2, top cover 3, outer surface 31, inner surface 32, first guide groove 4, second guide groove 5, guide part 6, lower box body 7, bending part 71, stopper part 72, upper cover 8, positioning part 81, sealing edge 82, first sealing gasket 9, maintenance window 10, raised part 11, inspection cover 12, second sealing gasket 13, mounting frame 14, circuit board 15, connector 16. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, in the embodiment of the utility model, a power battery pack with anti-condensation effect is proposed, including a battery box 1 and a plurality of battery modules 2 installed in the battery box 1. The battery box 1 has a sealing effect and adopts a high-strength sheet metal structure. The battery modules 2 and related electrical components are integrated and installed to form a power battery pack. The specific number of battery modules 2 can be arranged and installed according to the actual power demand. For power battery packs, there are many outdoor scenes in actual use. If condensation occurs, it may affect the electrical parts. Therefore, the entire power battery pack needs to be designed to prevent condensation to improve the outdoor adaptability and safety of the power battery pack.

[0034] Specifically, firstly, the sealing performance of the battery box 1 is utilized, so that even if condensation occurs on the battery box 1, water droplets can be prevented from entering the interior and affecting the battery module 2. In addition, an insulating top cover 3 is installed above the battery module 2, and the outer surface 31 of the top cover 3 is an arc surface. The arc surface proposed here can be a line with a cross section of a circular arc or an oblique line or other line with a slope, and the top position of the top cover 3 is mainly considered to be higher than the two ends. In this way, the top cover 3 can be used to control the internal rising water vapor or diffused water vapor to flow to both sides when it touches the water droplets generated by condensation, thereby preventing it from falling on the battery module 2 and isolating it from the electrical parts. At the same time, a cavity is formed between the battery module 2 and the battery box 1, and the cavity is filled with a hygroscopic sheet. In addition to using the hygroscopic sheet to absorb the internal diffused water vapor, it also absorbs the water droplets flowing from the top cover 3 to both sides, further preventing the water droplets from gathering and flowing to the electrical parts. Among them, the filling amount of the desiccant sheet is based on the remaining space after the battery module 2 is installed in the battery box 1. Specifically, the desiccant sheet can be adhered to the inner wall of the battery box 1. In order to ensure the moisture absorption effect of the desiccant sheet, a commonly used synthetic fiber highly absorbent material can be used. The specific filling amount can be selected according to the internal space of each power battery pack.

[0035] In addition, a curved surface is provided on the top cover 3 to facilitate pressing when installing the top cover 3, and the resulting deformation facilitates the disassembly and assembly operations.

[0036] After the battery module 2 is covered with the top cover 3, the condensed water droplets can be effectively discharged outward. Specifically, the number of the top cover 3 is at least 1, and the top cover 3 can completely cover the entire area of ​​the battery module 2, or the entire battery module 2 can be covered by splicing multiple top covers 3. In order to guide the water droplets on the curved surface, it is also convenient to splice multiple top covers 3, such as Figure 3 , Figure 4As shown, a first guide groove 4 and a second guide groove 5 are respectively provided on both sides along the width direction of the top cover 3, and the opening directions of the first guide groove 4 and the second guide groove 5 are opposite; thereby, the water droplets generated on the inner surface 32 and the outer surface 31 can be guided and discharged through the first guide groove 4 and the second guide groove 5, and at the same time, the two adjacent top covers 3 can be snapped together to form a splicing connection through the first guide groove 4 and the second guide groove 5.

[0037] The battery module 2 is covered by the top cover 3 and has a detachable structure, so that a larger operating space is provided when assembling the battery module 2 .

[0038] When the water droplets guided outward by the first guide groove 4 and the second guide groove 5 flow to the edge, they need to be further guided to the outside of the battery module 2 to be absorbed by the moisture absorbent sheet as soon as possible. Therefore, guide portions 6 extending outward are provided on both sides along the length direction of the top cover 3.

[0039] The top cover 3 can guide the water droplets generated by condensation, and it needs to have an insulating effect and be able to adapt to pressure deformation. Therefore, the material of the top cover 3 is a soft insulating material, specifically PC material or ABS material, etc. In addition, the arc surface can be formed at the same time during the molding process, considering the space utilization, to avoid the top cover 3 protruding upward, the radius of the arc surface can be about 1570mm. Of course, if there is enough space, the radius size of the arc surface can be not specifically limited.

[0040] In addition to effectively absorbing moisture and guiding condensation droplets inside the battery box 1, the entire battery box 1 is exposed to a greater amount of water vapor in the external air, which will form condensation on the surface of the battery box 1. Therefore, the battery box 1 needs to form a good seal to prevent water droplets from entering the interior.

[0041] Specifically, Figure 1As shown, the battery box 1 includes a lower box body 7 and an upper cover 8, the opening edge of the lower box body 7 is provided with a bending portion 71 folded inwardly, the edge of the bending portion 71 is bent upwardly to form a stopper 72, the bending portion 71 and the stopper 72 form an inwardly folded structure, and the stopper 72 can block water droplets that may flow into the interior to prevent them from flowing into the interior from the opening; at the same time, a positioning portion 81 cooperating with the stopper 72 and a sealing edge 82 cooperating with the bending portion 71 are provided on the upper cover 8, and the bending portion 71 and the stopper 72 are connected to each other. A first sealing gasket 9 is provided between the sealing edges 82. The first sealing gasket 9 is sleeved on the stop portion 72, and cooperates with the stop portion 72 through the positioning portion 81 to form a fitting sealing surface, which can prevent water droplets from flowing when the upper cover 8 is in the closed state; at the same time, the first sealing gasket 9 is used to form a seal between the sealing edge 82 and the bending portion 71, thereby forming a blocking effect at two positions to ensure that water droplets do not flow into the battery box 1, and the sealing edge 82 and the bending portion 71 are locked by a plurality of fasteners, and the fasteners can be densely arranged to ensure uniform locking.

[0042] In order to facilitate the maintenance of internal devices, a maintenance window 10 is provided on the battery box 1. The maintenance window 10 is used to facilitate the maintenance of internal devices. At the same time, the maintenance window 10 can also be used to dehumidify the interior through a dehumidifier. The maintenance window 10 needs to be well sealed to prevent external condensation water droplets from entering the interior. Therefore, a protrusion 11 extending outward from the maintenance window 10 is also provided on the battery box 1. At the same time, an inspection cover 12 is provided on the cover 8 of the protrusion 11. A second sealing gasket 13 is provided between the protrusion 11 and the inspection cover 12. The inspection cover 12 and the protrusion 11 are locked by a number of fasteners. After the protrusion 11 protruding outward is covered by the inspection cover 12 and effectively sealed by the second sealing gasket 13, the maintenance window 10 can be effectively sealed and waterproofed, and the external water vapor can be prevented from entering through the maintenance window 10.

[0043] At the same time, the internal components also need to have a certain waterproof performance to improve the operation safety. Specifically, a mounting frame 14 is provided in the battery box 1, and a circuit board 15 is installed on the mounting frame 14. The surface of the circuit board 15 is coated with a waterproof material layer, which is an organic silicon coating adhesive, such as D955-NV01. The circuit board 15 is isolated and protected so that it can work normally even if it encounters water drops.

[0044] Specifically, a connector 16 is integrated on the circuit board 15, and the connector end of the connector 16 is arranged downward. If water drops are present, the water drops will not enter the connector end position, and the risk of short circuit can be effectively avoided.

[0045] Of course, another embodiment may also be adopted, in which a plug-in connector 16 is integrated on the circuit board 15, the plug-in end of the plug-in connector 16 is arranged upward, and the plug-in end of the plug-in connector 16 is provided with a protective cap or a protective cover; when the plug-in connector 16 is arranged upward, it may also be considered to protect the plug-in part by adding a protective cap or a protective cover.

[0046] Therefore, by designing the battery box 1 and the battery module 2 with anti-condensation structure, it is possible to effectively prevent the generated water droplets from contacting the electrical parts, so that the entire battery pack has good outdoor application performance and protection performance.

[0047] It should also be noted that the entire battery pack also includes connecting wires, sockets, switches and other devices, all of which can be protected. The electrical circuits not mentioned in this embodiment can directly adopt the existing circuit layout.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0050] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A power battery pack with anti-condensation effect, characterized in that: It comprises a battery box and a plurality of battery modules installed in the battery box, an insulating top cover is installed above the battery module, and the outer surface of the top cover is a curved surface; A cavity is formed between the battery module and the battery box, and the cavity is filled with a moisture-absorbing sheet.

2. A power battery pack with anti-condensation effect according to claim 1, characterized in that: The number of the top cover is at least one, and a first guide groove and a second guide groove are respectively provided on both sides along the width direction of the top cover, and the opening directions of the first guide groove and the second guide groove are opposite.

3. A power battery pack with anti-condensation effect according to claim 2, characterized in that: The first guide grooves of two adjacent top covers are buckled and matched with the second guide grooves.

4. The power battery pack with anti-condensation effect according to claim 2, characterized in that: The two sides along the length direction of the top cover are respectively provided with outwardly extending guide parts.

5. The power battery pack with anti-condensation effect according to claim 1, characterized in that: The top cover is made of soft insulating material.

6. A power battery pack with anti-condensation effect according to any one of claims 1 to 5, characterized in that: The battery box comprises a lower box body and an upper cover, the opening edge of the lower box body is provided with a bent portion folded inward, and the edge of the bent portion is bent upward to form a stopper; The upper cover is provided with a positioning portion cooperating with the stop portion, and a sealing edge cooperating with the bending portion; A first sealing gasket is provided between the bending portion and the sealing edge, and the first sealing gasket is sleeved on the stopper portion; The sealing edge and the bent portion are locked by a plurality of fasteners.

7. A power battery pack with anti-condensation effect according to claim 6, characterized in that: The battery box is provided with a maintenance window, and the battery box is also provided with a protrusion extending outward from the maintenance window; The protruding portion is covered with an inspection cover, a second sealing gasket is arranged between the protruding portion and the inspection cover, and the inspection cover and the protruding portion are locked by a plurality of fasteners.

8. The power battery pack with anti-condensation effect according to claim 7, characterized in that: A mounting frame is arranged in the battery box, a circuit board is mounted on the mounting frame, and a surface of the circuit board is coated with a waterproof material layer.

9. The power battery pack with anti-condensation effect according to claim 8, characterized in that: A plug-in connector is integrated on the circuit board, and a plug-in end of the plug-in connector is arranged downward.

10. The power battery pack with anti-condensation effect according to claim 8, characterized in that: A plug-in connector is integrated on the circuit board. The plug-in end of the plug-in connector is arranged upwards, and the plug-in end of the plug-in connector is sleeved with a protective cap or a protective cover.

Images