Battery module integrated with pressure sensor

Abstract

The utility model relates to the technical field of new energy batteries, in particular to a battery module integrated with a pressure sensor, which comprises a pressure sensor, an integrated busbar and a battery cell module, the battery cell module comprises a plurality of stacked battery cells and an end plate arranged at the outermost battery cell, the pressure sensor is clamped between two adjacent battery cells, the pressure sensor is electrically connected with the integrated busbar, and the integrated busbar covers one side, provided with a pole, of each battery cell. According to the battery module disclosed by the utility model, the pressure sensor is arranged between two adjacent battery cells, so that the requirement of detecting the battery pressure of the battery module can be met, the expansion force between the battery cells can be better detected by pressure detection data, the pressure sensor is integrated on the integrated busbar, and the data is transmitted to a BMS (Battery Management System), so that the battery pressure of the battery module can be detected. And the early warning effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and in particular to a battery module with an integrated pressure sensor. Background Art

[0002] Currently, battery module safety remains a primary consideration. To ensure battery module safety, monitoring the battery module status is an effective method. Battery module monitoring primarily utilizes battery sensors to collect battery voltage and temperature signals. These signals are then connected to the battery management system, which analyzes and determines the signals to achieve real-time monitoring of battery module operation. This work primarily falls under the purview of the CCS, and current monitoring does not include pressure sensors.

[0003] Generally, battery manufacturers only test the battery pressure in the laboratory, and only battery modules with higher requirements have battery pressure testing. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a battery module with an integrated pressure sensor. The battery module can meet the demand for battery pressure detection of the battery module by arranging a pressure sensor between two adjacent battery cells. The pressure detection data can better check the expansion force between the battery cells, and the pressure sensor is integrated into the integrated busbar to transmit the data to the BMS to achieve an early warning effect.

[0005] The purpose of the utility model is achieved through the following technical solution: a battery module with an integrated pressure sensor, comprising a pressure sensor, an integrated busbar and a battery cell module, wherein the battery cell module comprises a plurality of stacked battery cells and an end plate arranged at the outermost battery cells, the pressure sensor is clamped between two adjacent battery cells, the pressure sensor is electrically connected to the integrated busbar, and the integrated busbar cover is arranged on the side of the battery cell having a pole.

[0006] Furthermore, the integrated busbar is an FFC integrated busbar.

[0007] Furthermore, the FFC integrated busbar includes a blister box, an FFC component and several conductive aluminum bars. The upper end surface of the blister box is provided with a bonding area and several inlay areas. The FFC component is stacked on the bonding area, and the inlay areas are evenly distributed on both sides of the bonding area. The conductive aluminum bars are respectively embedded in the inlay areas. The conductive aluminum bars are electrically connected to the FFC components. At least several solder pads are provided on both sides of the FFC components, and the solder pads are connected to the pressure sensor through flying wires.

[0008] Furthermore, the pressure sensor is an array-type thin film pressure sensor or a single-point thin film pressure sensor.

[0009] Furthermore, the point-type thin film pressure sensor includes an upper conductive layer, a first sensing layer, a spacer layer, a second sensing layer and a lower conductive layer stacked in sequence, and the upper conductive layer and the lower conductive layer are both connected to the pad via flying wires.

[0010] Furthermore, the first sensing layer and the second sensing layer are both nano-sensitive layers, and the nano-sensitive layers are coated with nano-sensitive coatings.

[0011] The beneficial effect of the present invention is that the battery module of the present invention can meet the demand for battery pressure detection of the battery module by arranging a pressure sensor between two adjacent battery cells. The pressure detection data can better check the expansion force between the battery cells, and the pressure sensor is integrated into the integrated busbar to transmit the data to the BMS to achieve the purpose of early warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is an exploded schematic diagram of a battery module using a single-point thin film pressure sensor in Example 1;

[0013] Figure 2 This is a schematic structural diagram of the integrated busbar of the utility model;

[0014] Figure 3 This is an exploded schematic diagram of the integrated busbar of the present utility model;

[0015] Figure 4 This is a structural diagram of a single-point thin film pressure sensor of the present utility model;

[0016] Figure 5 This is an exploded schematic diagram of the single-point thin film pressure sensor of the present utility model;

[0017] Figure 6 is an exploded schematic diagram of a battery module using an array-type thin film pressure sensor in Example 2;

[0018] Figure 7 It is a structural diagram of the array-type thin film pressure sensor of the present utility model.

[0019] The figures are marked as follows: 1-pressure sensor, 11-upper conductive layer, 12-first sensing layer, 13-interlayer, 14-second sensing layer, 15-lower conductive layer, 2-integrated busbar, 21-blister box, 211-fitting area, 212-inlay area, 22-FFC component, 23-conductive aluminum busbar, 24-soldering pad, 25-flying wire, 3-battery cell module, 31-battery cell and 32-end plate. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of those skilled in the art, the following embodiments and accompanying drawings are provided. Figure 1-7 To further illustrate the present invention, the contents mentioned in the implementation manner are not intended to limit the present invention.

[0021] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it can be directly on the other element or indirectly on the other element.

[0022] When an element is referred to as being “connected to” another element, it can be directly connected to the another element or indirectly connected to the another element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do 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 this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0025] In the description of the present application, “plurality” means two or more, unless otherwise clearly defined.

[0026] Example 1

[0027] See Figure 1-5 A battery module with an integrated pressure sensor includes a pressure sensor 1, an integrated busbar 2 and a battery module 3. The battery module 3 includes a plurality of stacked battery cells 31 and an end plate 32 arranged at the outermost battery cells 31. The pressure sensor 1 is clamped between two adjacent battery cells 31. The pressure sensor 1 is electrically connected to the integrated busbar 2. The integrated busbar 2 covers the side of the battery cell 31 having a pole.

[0028] In this embodiment, by arranging a pressure sensor 1 and an integrated busbar 2 on the battery cell module 3, and clamping the pressure sensor 1 between two adjacent battery cells 31, the demand for detecting battery pressure of the battery module can be met, and the pressure sensor 1 can be integrated into the integrated busbar 2; the problem of inaccurate pressure detection of a single battery cell 31 is solved, and then the health status of the battery cell 31 is warned through connection through the integrated busbar 2.

[0029] In this embodiment, the integrated busbar 2 is an FFC integrated busbar 2, which includes a blister box 21, an FFC component 22 and several conductive aluminum bars 23. The upper end surface of the blister box 21 is provided with a bonding area 211 and several inlay areas 212. The FFC component 22 is stacked on the bonding area 211, and the inlay areas 212 are evenly distributed on both sides of the bonding area 211. The conductive aluminum bars 23 are respectively embedded in the inlay areas 212. The conductive aluminum bars 23 are electrically connected to the FFC components 22. At least several pads 24 are provided on both sides of the FFC components 22. The pads 24 are connected to the pressure sensor 1 through flying wires 25.

[0030] In this embodiment, the FFC integrated busbar 2, comprised of a blister pack 21, FFC components 22, and conductive aluminum busbars 23, offers advantages such as simplicity, lightness, and a secure connection. Furthermore, optimized surface coating design for the copper conductors in the FFC components 22 improves the reliability of the copper-to-aluminum connection. Furthermore, the use of copper foil or other metal foil in the FFC busbar manufacturing process effectively prevents signal interference and electromagnetic radiation, thereby ensuring the quality and stability of data transmission.

[0031] In this embodiment, the pressure sensor 1 is a single-point thin film pressure sensor 1; the point-type thin film pressure sensor 1 includes an upper conductive layer 11, a first sensing layer 12, an isolation layer 13, a second sensing layer 14 and a lower conductive layer 15 stacked in sequence, and the upper conductive layer 11 and the lower conductive layer 15 are both connected to the pad 24 through a flying wire 25.

[0032] In this embodiment, both the first sensing layer 12 and the second sensing layer 14 are nano-sensitive layers, and the nano-sensitive layers are coated with nano-sensitive coatings.

[0033] The point-type thin-film pressure sensor 1 in this embodiment is a highly sensitive resistive pressure sensor. When pressure is applied to the sensing layer, the sensor's resistance changes accordingly. The greater the pressure, the smaller the resistance. This also causes a change in the output voltage. The greater the pressure, the larger the output voltage. This effectively reflects the pressure exerted on the expansion between the battery cells 31.

[0034] Example 2

[0035] See Figure 6-7 The difference between this embodiment and Example 1 is that the pressure sensor 1 in this embodiment adopts an array-type thin film pressure sensor 1. The rest of the contents of this comparative example are the same as those of Example 2 and will not be repeated here.

[0036] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the scope of protection of the present invention.

Claims

1. A battery module with an integrated pressure sensor, characterized in that: It includes a pressure sensor, an integrated busbar and a battery cell module. The battery cell module includes a plurality of stacked battery cells and an end plate arranged at the outermost battery cells. The pressure sensor is clamped between two adjacent battery cells. The pressure sensor is electrically connected to the integrated busbar. The integrated busbar cover is arranged on the side of the battery cell with a pole.

2. The battery module with integrated pressure sensor according to claim 1, characterized in that: The integrated busbar is an FFC integrated busbar.

3. The battery module with integrated pressure sensor according to claim 2, characterized in that: The FFC integrated busbar includes a blister box, an FFC component and several conductive aluminum bars. The upper end surface of the blister box is provided with a bonding area and several inlay areas. The FFC component is stacked on the bonding area. The inlay areas are evenly distributed on both sides of the bonding area. The conductive aluminum bars are respectively embedded in the inlay areas. The conductive aluminum bars are electrically connected to the FFC component. At least several welding pads are provided on both sides of the FFC component. The welding pads are connected to the pressure sensor through flying wires.

4. The battery module with integrated pressure sensor according to claim 1, characterized in that: The pressure sensor is an array-type thin film pressure sensor or a single-point thin film pressure sensor.

5. The battery module with integrated pressure sensor according to claim 4, characterized in that: The point-type thin film pressure sensor comprises an upper conductive layer, a first sensing layer, a spacer layer, a second sensing layer and a lower conductive layer stacked in sequence, and both the upper conductive layer and the lower conductive layer are connected to the pad via flying wires.

6. The battery module with integrated pressure sensor according to claim 5, characterized in that: The first sensing layer and the second sensing layer are both nano-sensitive layers, and the nano-sensitive layers are coated with nano-sensitive coatings.

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