Waterproof battery with water inlet detection function

Abstract

The utility model relates to the technical field of batteries, in particular to a waterproof battery with a water inlet detection function, which comprises a battery shell, a battery pack and a water inlet detection device, the battery shell comprises an upper shell arranged at the top end and a lower shell arranged at the bottom end, the water inlet detection device comprises a first metal layer arranged on the inner wall of the upper shell and a second metal layer arranged on the inner wall of the lower shell, the first metal layer and the second metal layer are spaced by a certain distance and can be conducted through water, the first metal layer is grounded, and the second metal layer is electrically connected with a power supply. According to the utility model, the water inlet detection device is arranged at the joint of the battery shell, so that the water inlet event of the battery can be timely identified. And if the water inlet accident occurs, the first metal layer and the second metal layer are conducted by water, the voltage of the second metal layer is lowered, and the water inlet accident is judged based on the voltage change.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a waterproof battery with a water ingress detection function. Background Art

[0002] As the core component of new energy vehicles, power batteries will short-circuit and spontaneously ignite in a short period of time if water enters them, which will have serious consequences for the safety of life and property of the driver. Water ingress into batteries is an issue that needs to be taken seriously. Once water enters the battery, we should take timely measures to deal with it to avoid causing greater damage to the equipment and the environment. Therefore, we need a waterproof battery with water ingress detection function.

[0003] For example, a battery water ingress detection device and a power source (publication number: CN217542281U, publication date: 2022-10-04), including: a substrate; a first terminal, arranged on the substrate and electrically connected to a power source; and a second terminal, arranged on the substrate and spaced a predetermined distance from the first terminal, the second terminal being connected to the ground; wherein, when water is between the first terminal and the second terminal, the first terminal and the second terminal can be connected through water. The application provides a water ingress detection device with a simple structure, low cost and high sensitivity, and is applied to a power source. However, the water ingress detection device of the application is installed on the substrate, and moisture can easily penetrate from the place where the battery shell is connected, and it takes a certain time to reach the substrate. If the water ingress detection device is arranged at the connection of the battery shell, it can ensure that the battery can be identified in time when a water ingress event occurs. Utility Model Content

[0004] In view of the technical defects existing in the background technology, the utility model proposes a waterproof battery with a water ingress detection function, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0005] A waterproof battery with a water ingress detection function, comprising a battery housing, a battery pack and a water ingress detection device, wherein the battery pack and the water ingress detection device are respectively arranged in the battery housing, and the battery housing comprises an upper housing arranged at the top end, a lower housing arranged at the bottom end, and a sealing strip arranged between the upper housing and the lower housing;

[0006] The water inlet detection device includes a first metal layer arranged on the inner wall of the upper shell and a second metal layer arranged on the inner wall of the lower shell. The first metal layer and the second metal layer are separated by a certain distance and can be connected by water. The first metal layer is grounded, and the second metal layer is electrically connected to a power supply. A first insulating layer is provided on the side and upper surface of the first metal layer away from the upper shell, and a second insulating layer is provided on the side and lower surface of the second metal layer away from the lower shell. The first insulating layer and the second insulating layer are respectively fixed on the battery shell.

[0007] As a further technical solution of the utility model, matching protrusions and grooves are respectively provided at the bottom edge of the upper shell and the top edge of the lower shell, a placement groove is provided on the outside of the protrusion, the sealing strip is arranged in the placement groove and on the outside of the protrusion, the first insulating layer is arranged on the side of the protrusion away from the sealing strip, and the second insulating layer is arranged on the side of the groove away from the sealing strip.

[0008] As a further technical solution of the utility model, the first metal layer is arranged between the upper shell and the first insulating layer, and the first metal layer is arranged above the joint between the protrusion and the groove, and the second metal layer is arranged between the upper shell and the second insulating layer, and the second metal layer is arranged below the joint between the protrusion and the groove.

[0009] As a further technical solution of the utility model, the first metal layer and the second metal layer are wavy structures with the same shape, the first insulating layer and the second insulating layer are wavy structures with the same shape, and the shape of the first insulating layer matches the first metal layer, and the shape of the second insulating layer matches the second metal layer.

[0010] As a further technical solution of the utility model, the battery housing also includes a circuit board, on which a power supply and an MCU system are provided. The power supply is electrically connected to the second metal layer via a resistor, and the MCU system is connected in parallel between the resistor and the second metal layer.

[0011] As a further technical solution of the present invention, the vertical distance between the first metal layer and the second metal layer in the up and down directions is consistent.

[0012] As a further technical solution of the utility model, the first metal layer is provided with a plurality of first wave peaks, which are connected in parallel and then grounded, and the second metal layer is provided with a plurality of second wave valleys, which are connected in parallel and then electrically connected to a power supply.

[0013] The beneficial effects of the utility model are:

[0014] The utility model arranges the water ingress detection device at the connection of the battery shell, because water is more likely to enter the interior from the connection of the battery shell, and arranging the water ingress detection device there can ensure that the battery can be identified in time when water ingress occurs. If a water ingress accident occurs, water enters between the first metal layer and the second metal layer and conducts the first metal layer and the second metal layer, lowering the voltage of the second metal layer, and judging that a water ingress accident may occur based on the voltage change, the water ingress detection device has high sensitivity.

[0015] The utility model provides an insulating layer outside the metal layer, the insulating layer is used to fix and protect the metal layer to prevent the metal layer from being corroded by the external environment, and the insulating layer can prevent the user from touching the exposed metal part during use, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a diagram showing the internal structure of the upper shell and lower shell of a waterproof battery with a water ingress detection function.

[0017] Figure 2 The figure is an external structural diagram of a waterproof battery with a water ingress detection function.

[0018] Figure 3 for Figure 1 AA partial enlargement image.

[0019] Figure 4 The present invention is a structural diagram of a water ingress detection device for a waterproof battery with a water ingress detection function.

[0020] Figure 5 The present invention is a circuit connection diagram of a water ingress detection device for a waterproof battery with a water ingress detection function.

[0021] Among them: upper shell 11, protrusion 111, placement groove 112, lower shell 12, groove 121, sealing strip 13, water inlet detection device 2, first metal layer 21, first wave crest 211, second metal layer 22, second wave valley 221, first insulating layer 23, second insulating layer 24. DETAILED DESCRIPTION

[0022] The following is combined with Figures 1 to 5 The implementation methods of the present invention are described with relevant embodiments, but the implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as the known technology in this technical field and can be known and mastered by the technicians in this technical field.

[0023] The utility model provides a waterproof battery with a water ingress detection function, such as Figure 1 and Figure 2 As shown, it includes a battery housing, a battery pack and a water inlet detection device 2. The battery pack and the water inlet detection device 2 are respectively arranged in the battery housing. The battery housing includes an upper housing 11 arranged at the top, a lower housing 12 arranged at the bottom and a sealing strip 13 arranged between the upper housing 11 and the lower housing 12.

[0024] Battery sealing technology not only affects the life and performance of the battery, but is also directly related to the vehicle's mileage and safety performance. In order to prevent the leakage of liquid inside the battery and the entry of external moisture into the battery, the sealing strip 13 is usually made of materials with good elasticity and aging resistance, such as rubber or silicone. These materials can withstand the deformation and vibration of the battery shell. At the same time, the sealing strip 13 also has the characteristics of high temperature resistance and low temperature resistance, and can adapt to various harsh working environments.

[0025] When the sealing strip 13 is designed to fit tightly against the contact surface of the battery housing, an effective waterproof barrier can be formed. The sealing strip 13 can prevent moisture from entering the battery, thereby protecting sensitive components and electrolytes inside the battery from damage. Waterproof performance is an indispensable part of battery design. In the fields of new energy vehicles, smart wearable devices, outdoor power supplies, etc., high-quality waterproof sealing strips 13 can improve the reliability and durability of the battery, ensure the normal operation of the battery in harsh environments, and extend the service life of the battery.

[0026] like Figure 3 and Figure 4 As shown, the water inlet detection device 2 includes a first metal layer 21 arranged on the inner wall of the upper shell 11 and a second metal layer 22 arranged on the inner wall of the lower shell 12. The utility model arranges the water inlet detection device 2 at the connection of the battery shell. Since moisture can more easily enter the interior from the connection of the battery shell, the water inlet detection device 2 is arranged there, which can ensure that the battery can be identified in time when a water ingress event occurs.

[0027] The first metal layer 21 and the second metal layer 22 are separated by a certain distance and can be connected by water. When the upper shell 11 and the lower shell 12 of the battery are fitted and fixed, a narrow gap is formed between the first metal layer 21 and the second metal layer 22 to ensure that the first metal layer 21 and the second metal layer 22 can be connected even with a small amount of water.

[0028] like Figure 5 As shown in the figure, the ground is GND, the power supply is VCC, the first metal layer 21 is grounded, and the second metal layer 22 is electrically connected to the power supply. When the first metal layer 21 and the second metal layer 22 are not conductive, the first metal layer 21 is at the ground voltage, and the second metal layer 22 is at the power supply voltage. If a water ingress accident occurs, moisture enters between the first metal layer 21 and the second metal layer 22 and conducts the first metal layer 21 and the second metal layer 22, pulling down the voltage of the second metal layer 22. Based on the voltage change, it can be determined that a water ingress accident has occurred, and thus the water ingress detection device 2 has high sensitivity.

[0029] The first metal layer 21 is provided with a first insulating layer 23 on the side and upper surface away from the upper shell 11, and the second metal layer 22 is provided with a second insulating layer 24 on the side and lower surface away from the lower shell 12. The first insulating layer 23 and the second insulating layer 24 are fixed on the battery shell, respectively. The utility model is provided with an insulating layer outside the metal layer, and the insulating layer is used to fix and protect the metal layer to prevent the metal layer from being corroded by the external environment. The insulating layer can also prevent the user from touching the exposed metal part during use, thereby improving safety.

[0030] As one of the preferred embodiments of the present invention, Figure 1 As shown, the bottom edge of the upper shell 11 and the top edge of the lower shell 12 are respectively provided with matching protrusions 111 and grooves 121, the outer side of the protrusion 111 is provided with a placement groove 112, and the sealing strip 13 is arranged in the placement groove 112 and on the outer side of the protrusion 111. The cooperation between the protrusion 111 and the groove 121 allows the battery to be firmly attached together, and the two are preferably interference fit to increase the friction between them and prevent moisture from entering.

[0031] Furthermore, the size and shape of the sealing strip 13 match the contact surfaces of the upper shell 11 and the lower shell 12, ensuring that the sealing strip 13 can completely cover potential water seepage points. The material needs to have sufficient elasticity and aging resistance to cope with deformation and aging during long-term use. The sealing strip 13 is installed in the placement groove 112 to ensure that it can be firmly fixed on the battery shell and is not easy to fall off or shift.

[0032] The first insulating layer 23 is disposed on the side of the bump 111 away from the sealing strip 13, and the second insulating layer 24 is disposed on the side of the groove 121 away from the sealing strip 13. The first metal layer 21 is disposed between the upper shell 11 and the first insulating layer 23, and the first metal layer 21 is disposed above the joint of the bump 111 and the groove 121, and the second metal layer 22 is disposed between the upper shell 11 and the second insulating layer 24, and the second metal layer 22 is disposed below the joint of the bump 111 and the groove 121.

[0033] The first metal layer 21 and the second metal layer 22 are respectively arranged above and below the joint of the protrusion 111 and the groove 121, so that the first metal layer 21 and the second metal can be in contact with moisture more promptly, react to water ingress more quickly, and the battery can be identified promptly when water ingress occurs.

[0034] As one of the preferred embodiments of the present invention, Figure 4 As shown, the first metal layer 21 and the second metal layer 22 are wavy structures with the same shape, the first insulating layer 23 and the second insulating layer 24 are wavy structures with the shape of the first insulating layer 23 matching the first metal layer 21 and the shape of the second insulating layer 24 matching the second metal layer 22.

[0035] The first metal layer 21 and the second metal layer 22 of the wavy structure can allow moisture to accumulate in the valley, thereby conducting the first metal layer 21 and the second metal layer 22 at the valley, so as to prevent too little or too dispersed moisture from entering the battery housing, resulting in the inability of moisture to conduct the first metal layer 21 and the second metal layer 22. The first insulating layer 23 and the second insulating layer 24 of the wavy structure can better protect the first metal layer 21 and the second metal layer 22 of the wavy structure, prevent the metal layer from being corroded by the external environment, and the insulating layer can prevent the user from touching the exposed metal part during use, thereby improving safety.

[0036] As one of the preferred embodiments of the utility model, the battery housing also includes a circuit board, on which a power supply and an MCU system are provided. The power supply is electrically connected to the second metal layer 22 via a resistor, and the MCU system is connected in parallel between the resistor and the second metal layer 22 .

[0037] When there is no water ingress, the first metal layer 21 is the ground voltage, and the second metal layer 22 is the power supply voltage. At this time, the MCU system collects a higher voltage; when water ingress occurs, the first metal layer 21 and the second metal layer 22 are connected, pulling down the voltage of the second metal layer 22, and at this time, the MCU system collects a lower voltage. Based on the voltage change, it can be judged that a water ingress accident has occurred, and thus the water ingress detection device 2 has high sensitivity. Furthermore, the MCU system processes the collected voltage signal, and after judging that water has ingressed, it sends a water ingress alarm signal to the user.

[0038] As one of the preferred embodiments of the utility model, the vertical distances between the first metal layer 21 and the second metal layer 22 in the upper and lower directions are consistent, ensuring that the water ingress detection sensitivity at the connection between the battery casing is consistent, preventing certain areas from being less sensitive and more susceptible to moisture erosion, causing the battery to require more frequent maintenance or replacement.

[0039] As one of the preferred embodiments of the present invention, Figure 4 As shown, the first metal layer 21 is provided with a plurality of first wave crests 211, which are connected in parallel and then grounded, and the second metal layer 22 is provided with a plurality of second wave valleys 221, which are connected in parallel and then electrically connected to a power source. The first metal layer 21 is connected in parallel and then grounded through a plurality of first wave crests 211, and the second metal is connected in parallel and then electrically connected to a power source through a plurality of second wave valleys 221, which can reduce the influence of the increase in internal resistance due to the length of the first metal layer 21 and the second metal layer 22 on signal transmission, and improve the sensitivity of the device.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A waterproof battery with water ingress detection function, characterized in that: Comprising a battery housing, a battery pack and a water ingress detection device (2), wherein the battery pack and the water ingress detection device (2) are respectively arranged in the battery housing, and the battery housing comprises an upper housing (11) arranged at the top end, a lower housing (12) arranged at the bottom end, and a sealing strip (13) arranged between the upper housing (11) and the lower housing (12); The water ingress detection device (2) comprises a first metal layer (21) arranged on the inner wall of the upper shell (11) and a second metal layer (22) arranged on the inner wall of the lower shell (12); the first metal layer (21) and the second metal layer (22) are separated by a certain distance and can be connected to each other via water; the first metal layer (21) is grounded, and the second metal layer (22) is electrically connected to a power source; a first insulating layer (23) is provided on the side and upper surface of the first metal layer (21) away from the upper shell (11); a second insulating layer (24) is provided on the side and lower surface of the second metal layer (22) away from the lower shell (12); and the first insulating layer (23) and the second insulating layer (24) are respectively fixed to the battery shell.

2. The waterproof battery with water ingress detection function according to claim 1, characterized in that: Matching protrusions (111) and grooves (121) are respectively provided at the bottom edge of the upper shell (11) and the top edge of the lower shell (12); a placement groove (112) is provided on the outside of the protrusion (111); the sealing strip (13) is arranged in the placement groove (112) and on the outside of the protrusion (111); the first insulating layer (23) is arranged on a side of the protrusion (111) away from the sealing strip (13); and the second insulating layer (24) is arranged on a side of the groove (121) away from the sealing strip (13).

3. The waterproof battery with water ingress detection function according to claim 2, characterized in that: The first metal layer (21) is arranged between the upper shell (11) and the first insulating layer (23), and the first metal layer (21) is arranged above the joint between the protrusion (111) and the groove (121); the second metal layer (22) is arranged between the upper shell (11) and the second insulating layer (24), and the second metal layer (22) is arranged below the joint between the protrusion (111) and the groove (121).

4. The waterproof battery with water ingress detection function according to claim 1, characterized in that: The first metal layer (21) and the second metal layer (22) are respectively wavy structures of the same shape, the first insulating layer (23) and the second insulating layer (24) are respectively wavy structures in shape, and the shape of the first insulating layer (23) matches the first metal layer (21), and the shape of the second insulating layer (24) matches the second metal layer (22).

5. The waterproof battery with water ingress detection function according to claim 1, characterized in that: The battery housing also includes a circuit board, on which a power supply and an MCU system are provided. The power supply is electrically connected to the second metal layer (22) via a resistor, and the MCU system is connected in parallel between the resistor and the second metal layer (22).

6. The waterproof battery with water ingress detection function according to claim 1, characterized in that: The vertical distance between the first metal layer (21) and the second metal layer (22) in the up-down direction is consistent.

7. The waterproof battery with water ingress detection function according to claim 1, characterized in that: The first metal layer (21) is provided with a plurality of first wave peaks (211), and the plurality of first wave peaks (211) are connected in parallel and then grounded; the second metal layer (22) is provided with a plurality of second wave valleys (221), and the plurality of second wave valleys (221) are connected in parallel and then electrically connected to a power source.

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