Vehicle-mounted battery pack shell sealing performance real-time online detection system and method

Abstract

The invention relates to the technical field of batteries, in particular to a real-time online detection system and method for the sealing performance of a vehicle-mounted battery pack shell. Comprising a plurality of optical sensors used for detecting the internal light intensity of a vehicle-mounted battery pack shell; the battery management unit is provided with a resistance detection interface, and the resistance detection interface is connected with the inner surface conducting layer and the outer surface conducting layer of the vehicle-mounted battery pack shell and used for measuring the resistance value between the inner surface conducting layer and the outer surface conducting layer; a plurality of electric signal detection interfaces, wherein each electric signal detection interface is correspondingly connected with one optical sensor; and the battery detection and control interface is connected with the battery stack and is used for detecting parameters of the battery stack and performing charging and discharging management. According to the vehicle-mounted battery pack shell, the resistance value between the inner surface conducting layer and the outer surface conducting layer and the internal light intensity of the vehicle-mounted battery pack shell are detected online in real time, and the sealing performance of the shell is detected online in real time.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically to a system and method for real-time online detection of the sealing performance of a vehicle battery pack casing. Background Technology

[0002] In actual use, vehicle battery packs occasionally experience issues such as impact seal failure, dents and cracks, and punctures by metal objects. Currently, there are no effective real-time detection measures to detect these problems. Because these issues are difficult to detect promptly, vehicle batteries, after continuous use in environments with water, high humidity, or high salinity, are at risk of internal water ingress, electrical corrosion, poor insulation, and leakage. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a real-time online detection system and method for the sealing performance of vehicle battery pack casings.

[0004] A real-time online detection system for the sealing performance of a vehicle battery pack casing includes, Multiple optical sensors (2) are used to detect the internal light intensity of the vehicle battery pack housing (4); Battery management unit (1), wherein the battery management unit (1) is provided with, Resistance detection interface (101) is connected to the inner surface conductive layer (403) and the outer surface conductive layer (401) of the vehicle battery pack housing (4) and is used to measure the resistance value between the inner surface conductive layer (403) and the outer surface conductive layer (401). Multiple electrical signal detection interfaces (102), each of the electrical signal detection interfaces (102) is connected to one of the optical sensors (2); The battery detection and control interface (103) is connected to the battery stack (3) and is used to detect the parameters of the battery stack (3) and perform charge and discharge management.

[0005] The vehicle battery pack casing sealing real-time online detection system of the present invention includes a resistance detection interface (101) with a positive contact and a negative contact, which are respectively connected to the inner surface conductive layer (403) and the outer surface conductive layer (401).

[0006] The real-time online detection system for the sealing performance of the vehicle battery pack housing of the present invention includes an optical sensor (2) and a battery stack (3) installed inside the vehicle battery pack housing (4).

[0007] The vehicle battery pack housing sealing real-time online detection system of the present invention includes, from the outside to the inside, the vehicle battery pack housing (4) includes, in sequence, the inner surface conductive layer (403), the insulating layer (402) and the outer surface conductive layer (401). The inner surface conductive layer (403) covers all the internal surfaces of the vehicle battery pack housing (4) and the outer surface conductive layer (401) covers all the external surfaces of the vehicle battery pack housing (4). The vehicle battery pack housing (4) adopts a sealed structure made of opaque material.

[0008] The real-time online detection system for the sealing performance of the vehicle battery pack casing of the present invention includes parameters such as voltage, temperature, and current.

[0009] The real-time online detection system for the sealing performance of the vehicle battery pack casing of the present invention has an outer surface conductive layer (401) that is a thin-layer flexible pleated structure.

[0010] The vehicle battery pack casing sealing real-time online detection system of the present invention, wherein the battery management unit (1) compares the resistance value between the inner surface conductive layer (403) and the outer surface conductive layer (401) with a first threshold, and generates a damage fault signal when the resistance value is less than the first threshold, wherein the first threshold is 1MΩ.

[0011] The real-time online detection system for the sealing performance of the vehicle battery pack casing of the present invention includes a battery management unit (1) that compares the internal light intensity of the vehicle battery pack casing (4) with a second threshold, and generates a light intensity fault signal when the internal light intensity is greater than the second threshold.

[0012] A method for real-time online detection of the sealing performance of a vehicle battery pack casing, used in the aforementioned real-time online detection system for the sealing performance of a vehicle battery pack casing, includes the following steps: The resistance value between the inner surface conductive layer (403) and the outer surface conductive layer (401) is detected, and a damage fault signal is generated when the resistance value is less than a first threshold. The internal light intensity of the vehicle battery pack casing (4) is detected, and a light intensity fault signal is generated when the internal light intensity is greater than a second threshold.

[0013] The real-time online detection method for the sealing performance of the vehicle battery pack casing of the present invention reports the damage fault signal and / or the light intensity fault signal to the vehicle system, and the vehicle system displays the damage fault signal and / or the light intensity fault signal on the human-machine interface of the vehicle system.

[0014] Beneficial effects: This invention can detect the sealing performance of the casing in real time by detecting the resistance value between the inner and outer conductive layers and the internal light intensity of the vehicle battery pack casing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a real-time online detection system for the sealing performance of a vehicle battery pack casing according to the present invention; Figure 2 This is a block diagram illustrating the composition of a real-time online detection system for the sealing performance of a vehicle battery pack casing according to the present invention. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0019] Reference Figure 1 , Figure 2 A real-time online detection system for the sealing performance of a vehicle battery pack casing includes, Multiple optical sensors 2 are used to detect the internal light intensity of the vehicle battery pack casing 4; Battery management unit 1, battery management unit 1 is equipped with, Resistance detection interface 101 connects the inner surface conductive layer 403 and the outer surface conductive layer 401 of the vehicle battery pack housing 4, and is used to measure the resistance value between the inner surface conductive layer 403 and the outer surface conductive layer 401. Multiple electrical signal detection interfaces 102, each of which is connected to an optical sensor 2; The battery detection and control interface 103 is connected to the battery stack 3 and is used to detect the parameters of the battery stack 3 and perform charge and discharge management.

[0020] In view of the shortcomings of existing vehicle battery packs, which cannot detect the sealing performance of the casing in real time during use, this invention determines whether the casing is well sealed by detecting the insulation resistance value between the inner surface conductive layer 403 and the outer surface conductive layer 401 of the vehicle battery pack casing 4 and the internal light intensity of the vehicle battery pack casing 4. This helps to avoid problems such as internal water ingress, circuit corrosion, and leakage due to poor insulation during subsequent use of the battery pack.

[0021] The battery detection and control interface 103 of the present invention serves as a maintenance detection interface, enabling the detection of parameters such as voltage, temperature, and current of the battery stack 3, as well as the control of charging and discharging functions. The battery stack 3 can be composed of multiple lithium-ion battery cells arranged in an array through series and parallel connection, located inside the vehicle battery pack casing 4.

[0022] The vehicle battery pack casing sealing real-time online detection system of the present invention includes a resistance detection interface 101 with a positive contact and a negative contact, which are respectively connected to the inner surface conductive layer 403 and the outer surface conductive layer 401, and are used to measure the resistance value between the inner and outer surface conductive layers. Under normal conditions, the resistance value between the two conductive layers is greater than 1MΩ, indicating that the battery pack casing has not been subjected to penetrating mechanical damage. Otherwise, the battery pack seal has been mechanically damaged. Through this detection measure, it is possible to detect in a timely manner whether the battery pack casing has been damaged.

[0023] The vehicle battery pack housing sealing performance real-time online detection system of the present invention includes a vehicle battery pack housing 4 which is a sealed housing formed by composite process. From the outside to the inside, it includes an inner surface conductive layer 403, an insulating layer 402 and an outer surface conductive layer 401. The inner surface conductive layer 403 covers all the internal surfaces of the vehicle battery pack housing 4, and the outer surface conductive layer 401 covers all the external surfaces of the vehicle battery pack housing 4.

[0024] To better enable conductivity detection of penetrating mechanical damage, the outer surface conductive layer 401 has a thin, flexible, pleated structure, which fills the through hole and connects to the inner surface conductive layer 403.

[0025] The vehicle battery pack casing 4 is a sealed structure made of opaque material. When completely sealed, changes in external light cannot be detected.

[0026] The real-time online detection system for the sealing performance of the vehicle battery pack housing of the present invention includes an optical sensor 2 which may include four optical sensors installed inside the vehicle battery pack housing 4.

[0027] The vehicle battery pack casing sealing real-time online detection system of the present invention compares the resistance value between the inner surface conductive layer 403 and the outer surface conductive layer 401 with a first threshold. When the resistance value is less than the first threshold, a damage fault signal is generated. The first threshold is 1MΩ.

[0028] The real-time online detection system for the sealing performance of the vehicle battery pack casing of the present invention includes a battery management unit 1 that compares the internal light intensity of the vehicle battery pack casing 4 with a second threshold, and generates a light intensity fault signal when the internal light intensity is greater than the second threshold.

[0029] If the battery pack casing develops cracks or holes that cause light leakage, multiple photoelectric sensors 2 transmit the light leakage information of the damaged battery pack casing to the battery management unit 1. The battery management unit 1 can then immediately report this to the vehicle system, thereby detecting the damage to the battery pack casing in real time.

[0030] A method for real-time online detection of the sealing performance of a vehicle battery pack casing, used in the aforementioned real-time online detection system for the sealing performance of a vehicle battery pack casing, includes the following steps: The resistance value between the inner surface conductive layer 403 and the outer surface conductive layer 401 is detected, and a damage fault signal is generated when the resistance value is less than a first threshold. The internal light intensity of the vehicle battery pack casing 4 is detected, and a light intensity fault signal is generated when the internal light intensity is greater than a second threshold.

[0031] The real-time online detection method for the sealing performance of the vehicle battery pack casing of the present invention reports damage fault signals and / or light intensity fault signals to the vehicle system, and the vehicle system displays the damage fault signals and / or light intensity fault signals on the human-machine interface of the vehicle system.

[0032] This invention detects the resistance value between the inner surface conductive layer 403 and the outer surface conductive layer 401. Under normal conditions, the resistance value is not less than a first threshold, indicating that the battery pack sealing shell has not suffered penetrating mechanical damage. When the resistance value is less than the first threshold, it indicates that the vehicle battery pack sealing shell has suffered penetrating mechanical damage, generating a damage fault signal. It also detects that when the internal light intensity is greater than a second threshold, it indicates that the battery pack sealing shell has cracks, holes, or other defects, generating a light intensity fault signal. The damage fault signal and / or the light intensity fault signal are reported to the vehicle system. The vehicle system displays the fault information on the human-machine interface of the vehicle system based on the reported signals, reminding the user to perform maintenance.

[0033] The description and accompanying drawings provide typical embodiments of specific structures for specific implementations. Other modifications are possible based on the spirit of the invention. While the above-described invention presents preferred embodiments, these are not intended to be limiting.

[0034] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be construed as covering all changes and modifications that encompass the true intent and scope of the invention. Any and all equivalent scope and content within the scope of the claims should be considered to remain within the intent and scope of the invention.

Claims

1. A real-time online detection system for the sealing performance of a vehicle battery pack casing, characterized in that, include, Multiple optical sensors (2) are used to detect the internal light intensity of the vehicle battery pack housing (4); Battery management unit (1), wherein the battery management unit (1) is provided with, Resistance detection interface (101) is connected to the inner surface conductive layer (403) and the outer surface conductive layer (401) of the vehicle battery pack housing (4) and is used to measure the resistance value between the inner surface conductive layer (403) and the outer surface conductive layer (401). Multiple electrical signal detection interfaces (102), each of the electrical signal detection interfaces (102) is connected to one of the optical sensors (2); The battery detection and control interface (103) is connected to the battery stack (3) and is used to detect the parameters of the battery stack (3) and perform charge and discharge management.

2. The real-time online detection system for the sealing performance of the vehicle battery pack casing according to claim 1, characterized in that, The resistance detection interface (101) includes a positive contact and a negative contact, which are respectively connected to the inner surface conductive layer (403) and the outer surface conductive layer (401).

3. The real-time online detection system for the sealing performance of the vehicle battery pack casing according to claim 1, characterized in that, The optical sensor (2) and the battery stack (3) are installed inside the casing (4) of the vehicle battery pack.

4. The real-time online detection system for the sealing performance of the vehicle battery pack casing according to claim 1, characterized in that, The vehicle battery pack housing (4) includes, from the outside to the inside, the inner surface conductive layer (403), the insulating layer (402) and the outer surface conductive layer (401). The inner surface conductive layer (403) covers all the inner surfaces of the vehicle battery pack housing (4), and the outer surface conductive layer (401) covers all the outer surfaces of the vehicle battery pack housing (4). The vehicle battery pack housing (4) adopts a sealed structure made of opaque material.

5. The real-time online detection system for the sealing performance of the vehicle battery pack casing according to claim 1, characterized in that, The parameters include voltage, temperature, and current.

6. The real-time online detection system for the sealing performance of the vehicle battery pack casing according to claim 1, characterized in that, The outer surface conductive layer (401) is a thin-layer flexible pleated structure.

7. The real-time online detection system for the sealing performance of the vehicle battery pack casing according to claim 1, characterized in that, The battery management unit (1) compares the resistance value between the inner surface conductive layer (403) and the outer surface conductive layer (401) with a first threshold, and generates a damage fault signal when the resistance value is less than the first threshold, wherein the first threshold is 1MΩ.

8. The real-time online detection system for the sealing performance of the vehicle battery pack casing according to claim 1, characterized in that, The battery management unit (1) compares the internal light intensity of the vehicle battery pack housing (4) with a second threshold, and generates a light intensity fault signal when the internal light intensity is greater than the second threshold.

9. A method for real-time online detection of the sealing performance of a vehicle battery pack casing, characterized in that, The real-time online detection system for the sealing performance of the vehicle battery pack casing as described in any one of claims 1-8 includes the following steps: The resistance value between the inner surface conductive layer (403) and the outer surface conductive layer (401) is detected, and a damage fault signal is generated when the resistance value is less than a first threshold. The internal light intensity of the vehicle battery pack casing (4) is detected, and a light intensity fault signal is generated when the internal light intensity is greater than a second threshold.

10. The method for real-time online detection of the sealing performance of a vehicle battery pack casing according to claim 9, characterized in that, The damage fault signal and / or the light intensity fault signal are reported to the vehicle system, and the vehicle system displays the damage fault signal and / or the light intensity fault signal on the human-machine interface of the vehicle system.

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