Battery pack and vehicle for early warning of water ingress insulation failure

Abstract

The utility model relates to a kind of battery pack and vehicle of early warning water inlet insulation failure, comprising: box, for installing battery module, battery module is carried out energy transmission by high voltage loop;Insulation detection module is connected between high voltage loop and box;Drainage assembly is set in box, drainage assembly is connected with high voltage loop, and drainage assembly is used to drain the water entering box to high voltage loop. By setting drainage assembly and high voltage loop connection, drainage assembly actively drains the water entering box to high voltage loop, to make insulation failure faster occur, to shorten the time from water to insulation failure detected, improve early warning timeliness. By the real-time monitoring of combination with insulation detection module, the early warning of water inlet insulation failure is realized. The utility model can trigger early warning in the initial stage of water, effectively avoid short circuit, electric leakage and other safety accidents caused by insulation failure, significantly improve the safety of battery pack use.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage electrical technology of power battery systems, and in particular to a battery pack and vehicle with early warning of water ingress and insulation failure. Background Technology

[0002] Currently, the insulation detection design for lithium-ion power battery systems in new energy vehicles uses a BMS insulation detection module connected to the high-voltage circuit via an insulation detection harness. The other end of the harness is grounded. If the distance between the high-voltage circuit and the battery pack housing is 9.5mm, the existing design requires a water level exceeding 9.6mm to form an insulation circuit for detecting insulation problems caused by water ingress into the battery pack. Therefore, to detect insulation issues caused by water ingress into the battery pack, the water level must exceed 9.6mm to form a complete insulation circuit. This means that at low water levels, potential insulation faults may not be detected in time, thus creating a safety hazard. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, one objective of this utility model is to provide a battery pack with early warning of water ingress and insulation failure, to solve the problem that the existing insulation detection design of power battery systems cannot form an insulation circuit in time when water enters the battery pack, posing a safety hazard. A second objective is to provide a vehicle.

[0004] To achieve the above and other related objectives, this utility model provides a battery pack with early warning of water ingress and insulation failure, comprising:

[0005] The housing is used to install the battery module, which transmits energy through a high-voltage circuit.

[0006] An insulation detection module is connected between the high-voltage circuit and the enclosure.

[0007] A diversion assembly is disposed inside the tank and is connected to the high-pressure circuit. The diversion assembly is used to divert water entering the tank to the high-pressure circuit.

[0008] In one embodiment of the present invention, the drainage component includes a water-absorbing component and a drainage component. The water-absorbing component is connected to the housing and is used to absorb water entering the housing. The drainage component is connected to the water-absorbing component and the high-pressure circuit respectively and is used to drain the water in the water-absorbing component to the high-pressure circuit.

[0009] In one embodiment of this utility model, the water-absorbing component is bonded to the box body, and the drainage component overlaps with the water-absorbing component.

[0010] In one embodiment of this utility model, the water-absorbing component is an insulating water-absorbing component.

[0011] In one embodiment of this utility model, the diversion component is an insulated siphon diversion component.

[0012] In one embodiment of the present invention, the housing includes a high-voltage chamber and a battery chamber, the current diversion component is disposed in the high-voltage chamber, and the battery module is disposed in the battery chamber.

[0013] In one embodiment of the present invention, the high-voltage compartment is provided with a high-voltage connector, which is connected to the high-voltage circuit and is used to connect the battery module to the high-voltage equipment outside the housing.

[0014] In one embodiment of the present invention, the drainage component is disposed inside the high-pressure chamber and near the high-pressure connector.

[0015] In one embodiment of this utility model, the insulation detection module is connected to the high-voltage circuit and the enclosure via an insulation detection harness.

[0016] A vehicle including a battery pack with an early warning system for water ingress and insulation failure, as described above.

[0017] As described above, this invention has the following beneficial effects: By installing a drainage component connected to the high-voltage circuit inside the battery pack housing, the drainage component actively diverts water entering the housing to the high-voltage circuit, changing the conventional process of natural water ingress and slow wetting of the high-voltage circuit. By accelerating the contact between water and the high-voltage circuit, insulation failure occurs more quickly, thereby shortening the time from water ingress to the detection of insulation failure and improving the timeliness of early warning. Combined with real-time monitoring by the insulation detection module, early warning of water ingress insulation failure is achieved. Compared to the traditional passive waiting for water to naturally affect insulation performance, this invention can trigger an early warning in the initial stage of water ingress, allowing users sufficient time to take safety measures such as power outages and maintenance, effectively avoiding safety accidents such as short circuits and leakage caused by insulation failure, and significantly improving the safety of battery pack use. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] In the attached diagram:

[0020] Figure 1The diagram shown is a structural schematic of a battery pack that provides early warning of water ingress and insulation failure, as illustrated in an embodiment of this utility model.

[0021] Figure 2 The diagram shown is an electrical schematic of a battery pack that provides early warning of water ingress and insulation failure, as illustrated in an embodiment of this utility model.

[0022] The attached figures are labeled as follows:

[0023] Box 1, high voltage compartment 101, battery compartment 102, battery module 2, high voltage circuit 3, insulation detection module 4, current diversion assembly 5, water absorption component 501, current diversion component 502, insulation detection wiring harness 6. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0025] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0026] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0027] Please combine Figures 1 to 2 As shown, this utility model provides a battery pack with early warning of water ingress and insulation failure.

[0028] In an exemplary embodiment of this invention, a battery pack that provides early warning of water ingress and insulation failure includes:

[0029] The housing 1 is used to install the battery module 2, and the battery module 2 transmits energy through the high-voltage circuit 3;

[0030] Insulation detection module 4 is connected between high-voltage circuit 3 and enclosure 1;

[0031] The diversion component 5 is installed inside the housing 1 and is connected to the high-pressure circuit 3. The diversion component 5 is used to divert the water entering the housing 1 to the high-pressure circuit 3.

[0032] In this embodiment, a diversion component 5 is installed inside the battery pack housing 1 and connected to the high-voltage circuit 3. The diversion component 5 actively diverts water entering the housing 1 to the high-voltage circuit 3, without requiring the water level to exceed 9.6mm. By accelerating the contact between the water and the high-voltage circuit 3, insulation failure occurs more quickly, thereby shortening the time from water ingress to the detection of insulation failure and improving the timeliness of the early warning. Combined with the real-time monitoring of the insulation detection module 4, early warning of water ingress insulation failure is achieved. Compared to the traditional method of passively waiting for water to naturally affect insulation performance, this method can trigger an early warning at the initial stage of water ingress, allowing users sufficient time to take safety measures such as power outage and maintenance, effectively avoiding safety accidents such as short circuits and leakage caused by insulation failure, and significantly improving the safety of battery pack use.

[0033] For example, when the battery pack is working normally, battery module 2 transmits energy through high-voltage circuit 3, and insulation detection module 4 continuously monitors the insulation status between high-voltage circuit 3 and housing 1. Once water enters housing 1, drainage component 5 will quickly function to guide the water into high-voltage circuit 3, causing a change in the insulation resistance between high-voltage circuit 3 and housing 1. Insulation detection module 4 converts the detected insulation resistance change signal into an electrical signal and, through data processing and analysis, determines whether a preset warning threshold has been reached. When the warning threshold is reached, insulation detection module 4 will issue a warning signal, indicating that the battery pack may have insulation failure due to water ingress, so that personnel can take timely measures to address the issue.

[0034] It is worth noting that the enclosure 1 provides reliable physical protection for the battery module 2, preventing damage from external mechanical impacts and collisions. Simultaneously, the enclosure 1 employs a sealed design, which to a certain extent prevents external moisture, dust, and other impurities from entering the interior, creating a relatively stable working environment for the battery module 2. However, there are still some areas in the enclosure 1 that are prone to water ingress, such as the high-voltage connectors or the sealing positions of the explosion-proof valves.

[0035] In an exemplary embodiment of this application, the drainage component 5 includes a water-absorbing component 501 and a drainage component 502. The water-absorbing component 501 is connected to the housing 1 and is used to absorb water entering the housing 1. The drainage component 502 is connected to the water-absorbing component 501 and the high-pressure circuit 3 respectively and is used to drain the water in the water-absorbing component 501 to the high-pressure circuit 3.

[0036] In this embodiment, the water-absorbing component 501 can quickly absorb the water entering the housing 1, preventing water from moving inside the battery pack and effectively preventing water accumulation inside the housing 1. This avoids the risk of short circuits, corrosion, and other malfunctions caused by water soaking the battery module 2, ensuring the normal operation of the battery pack and extending its service life. The drainage component 502 can promptly drain the water to the high-voltage circuit 3, enabling the system to issue an alarm at the initial stage of water ingress.

[0037] In an exemplary embodiment of this application, the water-absorbing component 501 is bonded to the housing 1, and the drainage component 502 overlaps with the water-absorbing component 501.

[0038] In this embodiment, the adhesive bonding method between the water-absorbing component 501 and the housing 1 allows the water-absorbing component 501 to be fixed inside the housing 1. This effectively resists external forces such as vibration and bumps experienced by the battery pack during vehicle operation, preventing the water-absorbing component 501 from loosening or shifting, thereby ensuring continuous and stable absorption of moisture entering the housing 1. The adhesive bonding between the water-absorbing component 501 and the housing 1, and the overlapping connection between the drainage component 502 and the water-absorbing component 501, are simple to operate, requiring no complex installation tools or professional technicians, thus reducing installation difficulty.

[0039] In an exemplary embodiment of this application, the water-absorbing component 501 is an insulated water-absorbing component 501.

[0040] In this embodiment, the water-absorbing component 501 is made of insulating material to avoid misjudgment by the insulation detection module 4 and the occurrence of erroneous warnings, thus ensuring the accuracy and reliability of the warning system. The water-absorbing component 501 includes, but is not limited to, materials such as superabsorbent polymer resin, porous ceramic materials, or composite insulating and water-absorbing materials.

[0041] In an exemplary embodiment of this application, the drainage component 502 is an insulated siphon drainage component 502.

[0042] In this embodiment, the drainage component 502 includes, but is not limited to, an insulating silicone siphon tube or a polytetrafluoroethylene siphon tube. The drainage component 502 utilizes the siphon principle to drain the water absorbed by the water-absorbing component 501 to the high-voltage circuit 3 without an external power source. This allows the insulation detection module 4 to quickly detect changes in insulation status, trigger an early warning, and achieve efficient monitoring of water ingress insulation failure.

[0043] In an exemplary embodiment of this application, the housing 1 includes a high-voltage chamber 101 and a battery chamber 102, the diversion component 5 is disposed in the high-voltage chamber 101, and the battery module 2 is disposed in the battery chamber 102.

[0044] In this embodiment, the diversion component 5 is installed inside the high-voltage chamber 101. When water ingress occurs, the water mainly concentrates in the high-voltage chamber 101. The diversion component 5 guides the water to participate in the insulation test, while the battery module 2 inside the battery compartment 102 is less likely to come into contact with water. This greatly reduces the probability of battery module 2 short circuits, leakage and other faults caused by water ingress, greatly improves the overall safety of the battery pack, and provides reliable protection for vehicle operation.

[0045] In an exemplary embodiment of this application, the high-voltage compartment 101 is provided with a high-voltage connector, which is connected to the high-voltage circuit 3. The high-voltage connector is used to connect the battery module 2 to the high-voltage equipment outside the housing 1.

[0046] In this embodiment, during battery pack installation, the connection can be completed simply by connecting the high-voltage connector to the interface of the external device, simplifying the installation process and improving assembly efficiency.

[0047] In an exemplary embodiment of this application, the drainage component 5 is disposed inside the high-pressure chamber 101 and near the high-pressure connector.

[0048] In this embodiment, the high-voltage connector is one of the locations where water is likely to enter the housing 1. By placing the drainage component 5 near the high-voltage connector, when water enters the housing 1, the water-absorbing component 501 can absorb the water immediately and guide the water to the high-voltage circuit 3 through the drainage component 502. This allows the insulation detection module 4 to issue an early warning in the early stage of water ingress, effectively shortening the response time from water ingress to the warning and timely detecting insulation faults.

[0049] It is worth noting that drainage components 5 can be installed in areas of the enclosure 1 that are prone to water ingress, such as the high-voltage connector or the sealing position of the explosion-proof valve. This allows for monitoring of water ingress in the enclosure 1 at multiple points, providing more accurate early warning of water ingress and insulation failure of the battery pack.

[0050] In an exemplary embodiment of this application, the insulation detection module 4 is connected to the high-voltage circuit 3 and the housing 1 via the insulation detection harness 6.

[0051] In this embodiment, one end of the insulation detection module 4 is connected to the high-voltage circuit 3 through the insulation detection harness 6, and the other end is grounded to the housing 1 through the insulation detection harness 6.

[0052] This utility model also proposes a vehicle, including a battery pack with early warning of water ingress and insulation failure as described above.

[0053] The working principle involves a drainage component 5 connected to the high-voltage circuit 3 within the battery pack housing 1. This component actively diverts water entering the housing 1 to the high-voltage circuit 3, altering the conventional process of slow, natural water ingress into the circuit. By accelerating the contact between water and the circuit 3, insulation failure occurs more quickly, shortening the time from water ingress to detection and improving timely warnings. Combined with real-time monitoring by the insulation detection module 4, this system provides early warning of water-induced insulation failure. Compared to the traditional passive approach of waiting for water to naturally affect insulation performance, this system triggers warnings at the initial stage of water ingress, giving users ample time to take safety measures such as power outages and repairs. This effectively prevents short circuits and leakage caused by insulation failure, significantly improving battery pack safety. During normal operation, the battery module 2 transmits energy through the high-voltage circuit 3, while the insulation detection module 4 continuously monitors the insulation status between the high-voltage circuit 3 and the housing 1. Once water enters the housing 1, the drainage component 5 will quickly activate, guiding the water into the high-voltage circuit 3. This will cause a change in the insulation resistance between the high-voltage circuit 3 and the housing 1. The insulation detection module 4 will convert this change in insulation resistance into an electrical signal and, through data processing and analysis, determine whether a preset warning threshold has been reached. When the warning threshold is reached, the insulation detection module 4 will issue a warning signal, indicating that the battery pack may have insulation failure due to water ingress, allowing personnel to take timely measures to address the issue.

[0054] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A battery pack with early warning of water ingress and insulation failure, characterized in that, include: The housing is used to install the battery module, which transmits energy through a high-voltage circuit. An insulation detection module is connected between the high-voltage circuit and the enclosure. A diversion assembly is disposed inside the tank and is connected to the high-pressure circuit. The diversion assembly is used to divert water entering the tank to the high-pressure circuit.

2. The battery pack with early warning of water ingress and insulation failure according to claim 1, characterized in that: The drainage assembly includes a water-absorbing component and a drainage component. The water-absorbing component is connected to the housing and is used to absorb water entering the housing. The drainage component is connected to the water-absorbing component and the high-pressure circuit respectively and is used to drain the water in the water-absorbing component to the high-pressure circuit.

3. The battery pack with early warning of water ingress and insulation failure according to claim 2, characterized in that: The water-absorbing component is bonded to the box body, and the drainage component overlaps with the water-absorbing component.

4. The battery pack with early warning of water ingress and insulation failure according to claim 2, characterized in that: The water-absorbing component is an insulated water-absorbing component.

5. The battery pack with early warning of water ingress and insulation failure according to claim 4, characterized in that: The diversion component is an insulated siphon diversion component.

6. The battery pack with early warning of water ingress and insulation failure according to claim 2, characterized in that: The enclosure includes a high-voltage chamber and a battery chamber. The current diversion assembly is disposed in the high-voltage chamber, and the battery module is disposed in the battery chamber.

7. The battery pack with early warning of water ingress and insulation failure according to claim 6, characterized in that: The high-voltage compartment is equipped with a high-voltage connector, which is connected to the high-voltage circuit. The high-voltage connector is used to connect the battery module to the high-voltage equipment outside the compartment.

8. The battery pack with early warning of water ingress and insulation failure according to claim 7, characterized in that: The drainage component is located inside the high-pressure chamber, near the high-pressure connector.

9. The battery pack with early warning of water ingress and insulation failure according to claim 1, characterized in that: The insulation detection module is connected to the high-voltage circuit and the enclosure via an insulation detection harness.

10. A vehicle, characterized in that, This includes battery packs with early warning of water ingress and insulation failure as described in any one of claims 1-9.

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