A pressure detection member for a battery module, a battery module, and a battery pack

Abstract

The application provides a pressure detection piece for a battery module, a battery module and a battery pack, which comprise: a flexible pressure sensor, two sides of which are detection surfaces for detecting pressure changes; and an elastic body connected to the detection surfaces on the two sides of the flexible pressure sensor, for abutting against an outer wall of a battery cell and transmitting a deformation extrusion force to the flexible pressure sensor when the battery cell is deformed in a bulge shape. When the outer wall of the battery cell contacted by the elastic body appears a bulge phenomenon, the elastic body will be extruded and deformed, and further transmit the deformation extrusion force to the flexible pressure sensor, at which time the pressure data detected by the flexible pressure sensor will change. Therefore, it is realized that whether the battery cell appears a bulge phenomenon can be judged according to the change of the pressure data detected by the flexible pressure sensor, and the safe operation of the battery cell is ensured.

Description

Technical Field

[0001] This invention relates to the field of data processing, and more particularly to a pressure detection device for a battery module, a battery module, and a battery pack. Background Technology

[0002] Currently, energy storage BMS can monitor the battery status by detecting the cell voltage and temperature as well as the charging and discharging current.

[0003] However, after prolonged use and aging, overcharging and overheating can cause the battery cells to bulge. Continuing to use a bulging battery pack poses a significant safety risk. Currently, the BMS system cannot effectively monitor this bulging phenomenon and requires further improvement. Summary of the Invention

[0004] The main objective of this invention is to provide a pressure detection device for battery modules, a battery module, and a battery pack, which aims to effectively monitor whether the battery cells bulge, so as to ensure the safe use of the battery cells.

[0005] In a first aspect, the present invention provides a pressure detection component for a battery module.

[0006] A pressure detection component for a battery module, used to be disposed in the heat dissipation gap between the battery module cells, comprising: A flexible pressure sensor with detection surfaces on both sides for detecting pressure changes; An elastomer is connected to the detection surfaces on both sides of the flexible pressure sensor to abut against the outer wall of the battery cell and to transmit the deformation pressure to the flexible pressure sensor when the battery cell bulges and deforms.

[0007] In some embodiments, the cross-section of the elastomer gradually decreases in the direction close to the flexible pressure sensor, and eventually forms a connecting surface that coincides with the detection surface; The flexible pressure sensor has guide plates fixed on both sides of its periphery. The guide plates form a placement area for placing the elastic body on one side of the flexible pressure sensor. The spatial structure of the placement area is consistent with that of the elastic body. The inner wall of the guide plate is attached to the outer wall of the elastic body to transmit the deformation pressure to the flexible pressure sensor when the elastic body is subjected to compression deformation.

[0008] In some embodiments, the flexible pressure sensors are included in a plurality of spaced-apart configurations. The guide plates on the same side of adjacent flexible pressure sensors are fixedly connected at the periphery of the end away from the flexible pressure sensor, so that multiple flexible pressure sensors are formed as a whole through the guide plates.

[0009] In some embodiments, the guide plate has a connector on its periphery away from the flexible pressure sensor for connecting the battery cell of the battery module.

[0010] In some embodiments, the connector is a magnetic connector or an adhesive connector.

[0011] In some embodiments, the elastomer is made of a heat-resistant elastic material.

[0012] In some embodiments, the elastomer is made of an organosilicon material.

[0013] Secondly, the present invention also provides a battery module.

[0014] A battery module comprising: Multiple battery cells, with heat dissipation gaps between adjacent cells; The pressure detection device for the battery module as described above is located within the heat dissipation gap, with its two sides respectively covering the outer walls of the battery cells on both sides.

[0015] In some embodiments, the outer wall of the battery cell is provided with a mating groove corresponding to the periphery of the guide plate, so that the periphery of the guide plate can be inserted into the mating groove and abut against and compress the elastic body in the placement area.

[0016] Thirdly, the present invention also provides a battery pack.

[0017] A battery pack comprising the battery module as described above.

[0018] This invention provides a pressure detection component for a battery module, a battery module, and a battery pack. Through elastic bodies positioned on both sides of a flexible pressure sensor, when a bulge occurs on the outer wall of the battery cell in contact with the elastic body, the elastic body will be compressed and deformed, further transmitting the deformation pressure to the flexible pressure sensor. At this time, the pressure data detected by the flexible pressure sensor will change. Therefore, it is possible to determine whether a bulge has occurred in the battery cell based on the pressure data change detected by the flexible pressure sensor, thereby ensuring the safe operation of the battery cell. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation of the pressure detection device for the battery module between two battery cells in an embodiment of the present invention.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0021] Figure label: 10. Flexible pressure sensor; 20. Elastomers; 30. Guide plate; 40. Battery cell; 41. Connecting slot. Detailed Implementation

[0022] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] Currently, energy storage BMS can monitor the battery status by detecting the cell voltage and temperature as well as the charging and discharging current.

[0024] However, after prolonged use and aging, overcharging and overheating can cause the battery cells to bulge. Continuing to use a bulging battery pack poses a significant safety risk. Currently, the BMS system cannot effectively monitor this bulging phenomenon and requires further improvement.

[0025] To address the aforementioned issues, this application provides a pressure detection device for battery modules, a battery module, and a battery pack.

[0026] Firstly, referring to Figure 1 This invention provides a pressure detection component for battery modules.

[0027] A pressure detection component for a battery module, used to be disposed in the heat dissipation gap between battery module cells 40, comprising: The flexible pressure sensor 10 has detection surfaces on both sides for detecting pressure changes; An elastomer 20 is connected to the detection surfaces on both sides of the flexible pressure sensor 10 to abut against the outer wall of the battery cell 40 and to transmit the deformation pressure to the flexible pressure sensor 10 when the battery cell 40 bulges and deforms.

[0028] Among them, the flexible pressure sensor 10 has the characteristics of high sensitivity, fast response time, high detection limit and strong stability compared with the traditional rigid sensor, which enables it to effectively sense the subtle deformation of the elastic bodies 20 on both sides and detect the deformation of the elastic bodies 20 in a timely manner.

[0029] With this configuration, the elastic bodies 20 positioned on both sides of the flexible pressure sensor 10 will deform when a bulge appears on the outer wall of the battery cell 40 in contact with the elastic bodies 20. This deformation pressure will then be transmitted to the flexible pressure sensor 10, causing a change in the pressure data detected by the sensor. Therefore, the change in pressure data detected by the flexible pressure sensor 10 can be used to determine whether a bulge has occurred in the battery cell 40, thus ensuring the safe operation of the battery cell 40.

[0030] Furthermore, in some preferred embodiments, the cross-section of the elastomer 20 gradually decreases in the direction close to the flexible pressure sensor 10, and eventually forms a connecting surface that coincides with the detection surface; The flexible pressure sensor 10 has guide plates 30 fixed on both sides of its periphery. The guide plates 30 form a placement area for placing the elastic body 20 on one side of the flexible pressure sensor 10. The spatial structure of the placement area is consistent with that of the elastic body 20. The inner wall of the guide plate 30 is attached to the outer peripheral wall of the elastic body 20 to transmit the deformation pressure to the flexible pressure sensor 10 when the elastic body 20 is subjected to compression deformation.

[0031] This configuration, through the guide plate 30, allows the elastomer 20 to effectively transmit deformation pressure towards the flexible sensor when subjected to bulging deformation. This enables the flexible sensor to more sensitively detect whether bulging has occurred on the outer wall of the battery cell 40. Simultaneously, the cross-section of the elastomer 20 gradually decreases towards the flexible pressure sensor 10, allowing the relatively small flexible pressure sensor 10 to effectively monitor a larger area. This effectively reduces the area required for the flexible pressure sensor 10, controlling costs and demonstrating good practicality.

[0032] Furthermore, in some preferred embodiments, the pressure detection element for the battery module includes a plurality of spaced flexible pressure sensors 10; specifically, in this embodiment, four flexible pressure sensors 10 are arranged in a rectangular array.

[0033] The guide plates 30 on the same side of adjacent flexible pressure sensors 10 are fixedly connected at the periphery of the end away from the flexible pressure sensor 10, so that multiple flexible pressure sensors 10 are formed as a whole through the guide plates 30.

[0034] Specifically, multiple flexible pressure sensors 10 are connected to each other by guide plates 30 to form a whole, thereby covering a larger area of ​​the outer wall of the battery cell 40, enabling effective bulging monitoring of most or all of the outer wall of the battery cell 40.

[0035] Furthermore, in some preferred embodiments, the guide plate 30 has a connector on its periphery away from the flexible pressure sensor 10 for connecting the battery cell 40 of the battery module.

[0036] This design enables the pressure detection device for the battery module provided in this application to have greater stability when it comes into contact with the battery cells on both sides 40, thus avoiding detachment due to vibration.

[0037] Furthermore, in some preferred embodiments, the connector is a magnetic connector or an adhesive connector. This configuration allows for the quick and stable installation of the battery module pressure detection device provided in this application between two battery cells 40.

[0038] Furthermore, in some preferred embodiments, the elastomer 20 is made of a heat-resistant elastic material.

[0039] This design allows for the use of pressure detection devices in the battery module to monitor whether the cell 40 is bulging, while simultaneously forming an effective heat-insulating and flame-retardant layer between the two cells 40, further ensuring the operational safety of the cell 40.

[0040] Specifically, the elastomer 20 is made of organosilicon material.

[0041] Secondly, embodiments of the present invention provide a battery module.

[0042] A battery module comprising: Multiple battery cells 40, with heat dissipation gaps formed between adjacent battery cells 40; The pressure detection device for the battery module as described above is located in the heat dissipation gap, and its two sides cover the outer walls of the battery cells 40 on both sides respectively.

[0043] Furthermore, the outer wall of the battery cell 40 is provided with a docking groove 41 corresponding to the periphery of the guide plate 30, so that the periphery of the guide plate 30 can be inserted into the docking groove 41, and the outer wall of the battery cell 40 in the docking groove 41 can abut against and compress the elastic body 20 in the placement area.

[0044] This configuration ensures that the elastomer 20 has undergone a certain degree of compression deformation before the cell 40 bulges, making the overall structure of the elastomer 20 more compact and dense. When the cell 40 bulges, it will further compress and deform the elastomer 20, so that the deformation and compression force can be quickly and effectively transmitted to the flexible pressure sensor 10, thereby achieving monitoring.

[0045] Thirdly, embodiments of the present invention also provide a battery pack.

[0046] A battery pack, characterized in that it comprises a battery module as described above.

[0047] The working principle and beneficial effects of the pressure detection device, battery module, and battery pack for battery modules provided in this application are as follows: The elastic bodies 20 on both sides of the flexible pressure sensor 10 cause bulging on the outer wall of the battery cell 40 when they are in contact with the elastic bodies 20. The elastic bodies 20 are then subjected to compression deformation, which is transmitted to the flexible pressure sensor 10. This causes a change in the pressure data detected by the flexible pressure sensor 10. Therefore, the change in pressure data detected by the flexible pressure sensor 10 can be used to determine whether a bulging phenomenon has occurred in the battery cell 40, thus ensuring the safe operation of the battery cell 40. By using the guide plate 30, the elastic body 20 can effectively transmit the deformation pressure to the flexible sensor when subjected to bulging deformation, enabling the flexible sensor to more sensitively detect whether bulging has occurred on the outer wall of the battery cell 40. Simultaneously, the cross-section of the elastic body 20 gradually decreases towards the flexible pressure sensor 10, allowing the relatively small flexible pressure sensor 10 to effectively monitor a large area. This effectively reduces the area required for the flexible pressure sensor 10 to be installed, thus controlling costs and demonstrating good practicality.

[0048] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0049] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0050] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of the present invention.

[0051] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A pressure detection component for a battery module, used to be disposed in the heat dissipation gap between battery module cells, characterized in that, It includes: A flexible pressure sensor with detection surfaces on both sides for detecting pressure changes; An elastomer is connected to the detection surfaces on both sides of the flexible pressure sensor to abut against the outer wall of the battery cell and to transmit the deformation pressure to the flexible pressure sensor when the battery cell bulges and deforms. The cross-section of the elastomer gradually decreases in the direction close to the flexible pressure sensor, and eventually forms a connecting surface that coincides with the detection surface; The flexible pressure sensor has guide plates fixed on both sides of its periphery. The guide plates form a placement area for placing the elastic body on one side of the flexible pressure sensor. The spatial structure of the placement area is consistent with that of the elastic body. The inner wall of the guide plate is attached to the outer wall of the elastic body to transmit the deformation pressure to the flexible pressure sensor when the elastic body is subjected to compression deformation.

2. The pressure detection component for a battery module as described in claim 1, characterized in that, The flexible pressure sensor includes multiple spaced-apart sensors. The guide plates on the same side of adjacent flexible pressure sensors are fixedly connected at the periphery of the end away from the flexible pressure sensor, so that multiple flexible pressure sensors are formed as a whole through the guide plates.

3. The pressure detection component for a battery module as described in claim 1, characterized in that, The guide plate has a connector on its periphery away from the flexible pressure sensor for connecting the battery cell of the battery module.

4. The pressure detection component for a battery module as described in claim 3, characterized in that, The connector is a magnetic connector or an adhesive connector.

5. The pressure detection component for a battery module as described in claim 1, characterized in that, The elastomer is made of a heat-resistant elastic material.

6. The pressure detection component for a battery module as described in claim 5, characterized in that, The elastomer is made of organosilicon material.

7. A battery module, characterized in that, It includes: Multiple battery cells, with heat dissipation gaps between adjacent cells; The pressure detection device for a battery module as described in any one of claims 1-6 is disposed within the heat dissipation gap, with its two sides respectively covering the outer walls of the battery cells on both sides.

8. The battery module as described in claim 7, characterized in that, The outer wall of the battery cell is provided with a mating groove corresponding to the periphery of the guide plate, so that the periphery of the guide plate can be inserted into the mating groove, and the outer wall of the battery cell in the mating groove can abut against and compress the elastic body in the placement area.

9. A battery pack, characterized in that, It includes the battery module as described in claim 8.

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