Composite material battery bottom protection plate integrated with bottom collision sensing and early warning functions

Abstract

The invention relates to the technical field of composite material battery bottom protection plates, in particular to a thermoplastic composite material battery bottom protection plate integrated with bottom collision sensing and early warning functions, which comprises a battery bottom protection plate body, the battery bottom protection plate comprises a battery bottom protection plate body and further comprises bottom protection plate data interfaces and bottom collision sensors, one or more bottom protection plate data interfaces are formed in any edge of the battery bottom protection plate body, the bottom collision sensors are embedded in the battery bottom protection plate body, and mounting holes are formed in the flange face, fixed to a battery box, of the battery bottom protection plate body. By adopting the recyclable thermoplastic material, the composite material bottom protection plate can be recycled after the service life expires, so that the resources are saved, the material waste is reduced, and the carbon emission is reduced; and meanwhile, the bottom protection plate integrates the bottom collision sensing and early warning functions, so that the safety when the vehicle has a collision accident is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material battery bottom guard plates, and in particular to a thermoplastic composite material battery bottom guard plate with integrated bottom collision sensing and early warning functions. Background Art

[0002] Existing power battery bottom guards are divided into two categories: metal and composite materials. Common metal bottom guards are aluminum alloy bottom guards and steel bottom guards. Composite bottom guards can be divided into thermosetting composite bottom guards and thermoplastic composite bottom guards according to the type of resin. Thermosetting composite bottom guards cannot be secondary molded, recycled or reused, causing environmental pollution of solid waste. Thermoplastic composite materials have high strength and high modulus, and can be produced on a large scale continuously, and can be secondary processed and recycled. They are new materials that meet the green and environmental protection needs of the future.

[0003] Existing metal battery bottom guard plates or composite battery bottom guard plates cannot sense the location of the collision and assess the degree of battery damage when the power battery encounters a bottom collision accident. It is difficult to provide consumers and battery system manufacturers with accurate damage assessment information, and it is also impossible to provide early warning of secondary disasters that may be caused by the collision, such as battery cell fires or thermal runaway of the battery system, which restricts the further promotion of new energy vehicles.

[0004] Therefore, in order to address the above-mentioned problem that when a power battery encounters a bottom collision accident, it is impossible to sense the location of the collision and assess the degree of damage to the battery, making it difficult to provide consumers and battery system manufacturers with accurate damage assessment information, a thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions can be designed. Summary of the invention

[0005] In order to overcome the above-mentioned problem that when the power battery encounters a bottom collision accident, it is impossible to sense the location of the collision and assess the degree of damage to the battery, making it difficult to provide consumers and battery system manufacturers with accurate damage assessment information.

[0006] The technical solution of the present invention is: a thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions, including a battery bottom guard plate body; also including a bottom guard plate data interface and a bottom collision sensor, one or more bottom guard plate data interfaces are arranged on any edge of the battery bottom guard plate body, a bottom collision sensor is embedded in the interior of the battery bottom guard plate body, and a mounting hole is provided on the flange surface where the battery bottom guard plate body is fixed to the battery box body.

[0007] Preferably, the bottom guard plate data interface is connected to each resistance collection node of the bottom bump sensor, and has power supply and resistance signal pins, and transmits signals between the bottom guard plate data interface and the vehicle-mounted controller; and connects multiple set nodes through the bottom guard plate data interface.

[0008] Preferably, the material of the bottom impact sensor is a porous film structure with a thickness of 0.15 to 0.3 mm. An output node is provided on the bottom impact sensor, and the output node is connected to the bottom guard plate data interface.

[0009] The present invention also provides a composite material battery bottom guard plate detection method with integrated bottom collision sensing and warning functions, which comprises the composite material battery bottom guard plate as described above, and the steps are as follows: S1: The bottom guard plate data interface is connected to each resistance collection node of the bottom bump sensor, and has power supply and resistance signal pins, and transmits signals between the bottom guard plate data interface and the vehicle controller; S2: Connect multiple set nodes through the bottom guard plate data interface, which can obtain the resistance values ​​of multiple positions on the bottom of the battery pack. By collecting the resistance value of each node in real time and comparing it with the preset value in the vehicle program, the bottom collision damage and the location of the collision are monitored in real time; S3: Through pre-calibration, the vehicle control program can determine the location of the collision and the damage of the bottom guard plate through the different resistance value changes collected by the collision sensor; S4: The severity level is graded according to the resistance value change, control logic and alarm information. If the abnormal resistance parameter is between the first set threshold and the second set threshold, the severity level is level one; if the abnormal resistance parameter is between the second set threshold and the third set threshold, the severity level is level two; if the abnormal resistance parameter is greater than the third set threshold, the severity level is level three.

[0010] Preferably, the alarm information includes an alarm sound, an alarm message and an alarm logo.

[0011] Preferably, the alarm sound is a simulated sound of the battery pack hitting the bottom, and the alarm message is a text message that flashes in a conspicuous position on the vehicle's central control screen, HUD, and instrument panel information display terminal, indicating the severity level of the bottoming and emergency treatment methods.

[0012] Preferably, the alarm mark is an image and is displayed in a prominent position on the vehicle's central control screen, HUD, or information display terminal of the instrument panel, showing the severity level and location of the bottoming.

[0013] Preferably, the severity level is level one, and a simulated sound of a battery pack collision is played at a first volume value, and an alarm message prompts "The battery pack has a slight bump on the bottom, please drive carefully!" The alarm logo image uses a yellow circle with a built-in exclamation mark, indicating that the bottom of the battery pack has been bumped, and the location of the battery panel that has been bumped is displayed on the on-board display screen.

[0014] Preferably, the severity level is level two, and a simulated sound of a battery pack collision is played at the second volume value. The alarm message prompts "The battery pack has hit the bottom, and the shell is damaged. Please repair it immediately!" The alarm logo image uses an orange circle with a built-in exclamation mark, indicating that the bottom of the battery pack has been bumped, and the location of the battery panel that has been bumped is displayed on the on-board display screen.

[0015] Preferably, the severity level is level three, and a simulated sound of a battery pack collision is played at the third volume value. The alarm message prompts "The battery pack has hit the bottom and is seriously damaged. Please pull over as soon as possible!" The alarm logo image uses a red circular exclamation mark with a continuous flashing mark, indicating that the bottom of the battery pack has been bumped, and the location of the battery panel that has been bumped is displayed on the on-board display screen.

[0016] The beneficial effects of the present invention are as follows: compared with the existing metal battery bottom guard plate solutions on the market, it has the advantages of lightweight, heat preservation and insulation while having the same mechanical properties; lightweight can reduce the weight of the whole vehicle, thereby reducing the energy consumption of the whole vehicle and improving the energy conservation and emission reduction level of the vehicle; heat preservation can reduce the influence of the external temperature on the battery temperature, thereby reducing the demand for battery cooling or heating in driving mode, reducing the energy consumption of battery thermal management, and improving the cruising range of the whole vehicle; insulation can significantly improve the safety of the power battery when it is bumped, and significantly reduce the risk of short circuit under the same accident situation; the battery bottom guard plate adopts a thermoplastic composite material with a lower density. While having the same mechanical properties, it has the advantages of lightweight and low carbon emissions. Lightweight can reduce the weight of the whole vehicle, thereby reducing the energy consumption of the whole vehicle and improving the energy conservation and emission reduction level of the vehicle; recyclable thermoplastic materials can ensure that the thermoplastic composite bottom guard plate is recycled after the service life expires, thereby saving resources, reducing material waste, and reducing carbon emissions; at the same time, the bottom bump sensing and warning functions are integrated, which greatly improves the safety of the vehicle in the event of a bump accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic diagram of a first three-dimensional structure of a composite material battery bottom guard plate with integrated bottom collision sensing and warning functions of the present invention; Figure 2 Shown is a schematic diagram of the three-dimensional structure of a glass fiber fabric preform in a composite battery bottom guard plate with integrated bottom collision sensing and warning functions of the present invention; Figure 3 Shown is a first three-dimensional structural schematic diagram of the composite material battery bottom guard plate collision sensor with integrated bottom collision sensing and warning functions of the present invention.

[0018] Explanation of the accompanying drawings: 1. Battery bottom guard plate body; 2. Bottom guard plate data interface; 3. Bottom bump sensor. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] See also Figure 1 - Figure 3 The present invention provides an embodiment: a composite material battery bottom guard plate with integrated bottom collision sensing and warning functions, including a battery bottom guard plate body 1; also including a bottom guard plate data interface 2 and a bottom collision sensor 3, one or more bottom guard plate data interfaces 2 are arranged on the short sides of the battery bottom guard plate body 1, the bottom collision sensor 3 is embedded in the battery bottom guard plate body 1, and a mounting hole is provided on the flange surface where the battery bottom guard plate body 1 is fixed to the battery box.

[0021] See also Figure 2 - Figure 3 In this embodiment, the material of the bottom impact sensor 3 is a porous film structure with a thickness of 0.15 to 0.3 mm. An output node is provided on the bottom impact sensor 3, and the output node is connected to the bottom guard plate data interface 2.

[0022] A composite material battery bottom guard plate detection method with integrated bottom bump sensing and warning functions, which includes the composite material battery bottom guard plate with integrated bottom bump sensing and warning functions as described above, and the steps are as follows: the bottom guard plate data interface 2 is connected to each resistance acquisition node of the bottom bump sensor 3, and has power supply and resistance signal pins, and transmits signals between the bottom guard plate data interface 2 and the vehicle controller; the bottom guard plate data interface 2 is connected to a plurality of set nodes, which can obtain the resistance values ​​of multiple positions at the bottom of the battery pack, and monitor the bottom bump damage and the location where the bump occurs in real time by real-time acquisition of the resistance value of each node and comparing it with the preset value in the vehicle program; through pre-calibration, the vehicle control program can judge the location of the bump and the damage of the bottom guard plate through the different resistance value changes collected by the bump sensor; the severity level is graded according to the resistance value change, control logic and alarm information, and if the abnormal resistance parameter is between the first set threshold and the second set threshold, the severity level is level one; if the abnormal resistance parameter is between the second set threshold and the third set threshold, the severity level is level one. If the abnormal resistance parameter is greater than the third set threshold, the severity level is level two; if the abnormal resistance parameter is greater than the third set threshold, the severity level is level three; if the severity level is level one, a battery pack collision simulation sound of the first volume value is played, and an alarm message prompts "The battery pack is slightly knocked to the bottom, please drive carefully!" The alarm logo image uses a yellow circular built-in exclamation mark, indicating that the bottom of the battery pack is knocked, and the part of the battery panel that is knocked is displayed on the vehicle display screen; if the severity level is level two, a battery pack collision simulation sound of the second volume value is played, and an alarm message prompts "The battery pack is knocked to the bottom, the shell is damaged, please repair it immediately!" The alarm logo image uses an orange circular built-in exclamation mark, indicating that the bottom of the battery pack is knocked, and the part of the battery panel that is knocked is displayed on the vehicle display screen; if the severity level is level three, a battery pack collision simulation sound of the third volume value is played, and an alarm message prompts "The battery pack is knocked to the bottom, seriously damaged, please pull over as soon as possible!" The alarm logo image uses a red circular built-in exclamation mark and flashes continuously, indicating that the bottom of the battery pack is knocked, and the part of the battery panel that is knocked is displayed on the vehicle display screen.

[0023] Through the above steps, the recyclable thermoplastic material can ensure the recycling of the thermoplastic composite underbody guard after the life of the thermoplastic composite material expires, thereby saving resources, reducing material waste, and lowering carbon emissions; at the same time, the bottom collision sensing and warning functions are integrated, which greatly improves the safety of the vehicle in the event of a collision accident; to solve the above-mentioned problem that when the power battery encounters a bottom collision accident, it is impossible to sense the location of the collision and assess the degree of damage to the battery, making it difficult to provide consumers and battery system manufacturers with accurate damage assessment information.

[0024] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions, comprising a battery bottom guard plate body (1); characterized in that: It also comprises a bottom guard plate data interface (2) and a bottom impact sensor (3); one or more bottom guard plate data interfaces (2) are arranged on any side of the battery bottom guard plate body (1); a bottom impact sensor (3) is embedded inside the battery bottom guard plate body (1); and a mounting hole is provided on a flange surface for fixing the battery bottom guard plate body (1) to the battery box body.

2. The thermoplastic composite battery bottom guard plate with bottom collision sensing and warning functions according to claim 1 is characterized in that: The material of the bottom impact sensor (3) is a porous film structure with a thickness of 0.15 to 0.3 mm. An output node is provided on the bottom impact sensor (3), and the output node is connected to the bottom guard plate data interface (2).

3. The thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions according to claim 1 is characterized in that: The detection method is as follows: S1: The bottom guard plate data interface (2) is connected to each resistance collection node of the bottom bump sensor (3), and has power supply and resistance signal array pins, and transmits signals between the bottom guard plate data interface (2) and the vehicle controller; S2: Connecting a plurality of preset nodes via the bottom guard plate data interface (2) can obtain the resistance values ​​of multiple locations on the bottom of the battery pack, and by collecting the resistance value of each node in real time and comparing it with the preset value in the vehicle program, monitor the bottom impact damage and the location where the impact occurs in real time; S3: Through pre-calibration, the vehicle control program determines the location of the collision and the damage of the bottom guard plate through the different resistance value changes collected by the collision sensor; S4: The severity level is graded according to the resistance value change, control logic and alarm information. If the abnormal resistance parameter is between the first set threshold and the second set threshold, the severity level is level one; if the abnormal resistance parameter is between the second set threshold and the third set threshold, the severity level is level two; if the abnormal resistance parameter is greater than the third set threshold, the severity level is level three.

4. The thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions according to claim 3 is characterized in that: The alarm information includes alarm sound, alarm message and alarm logo.

5. The thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions according to claim 4 is characterized in that: The alarm sound is a simulated sound of the battery pack hitting the bottom, and the alarm message is a text message that flashes in a conspicuous position on the vehicle's central control screen, HUD, and instrument panel information display terminal, indicating the severity level of the bottoming and emergency treatment methods.

6. The thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions according to claim 4 is characterized in that: The alarm mark is an image and is displayed in a prominent position on the vehicle's central control screen, HUD, and instrument panel's information display terminal, showing the severity level and location of the bottoming.

7. The thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions according to claim 3 is characterized in that: The severity level is level one. The simulated sound of the battery pack collision is played at the first volume value. The alarm message prompts "The battery pack is slightly bumped to the bottom. Please drive carefully!" The alarm logo image uses a yellow circle with a built-in exclamation mark, indicating that the bottom of the battery pack is bumped, and the part of the battery panel that is bumped is displayed on the vehicle display screen.

8. The thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions according to claim 3 is characterized in that: The severity level is level 2. The simulated sound of the battery pack collision is played at the second volume value. The alarm message prompts "The battery pack has been hit on the bottom. The shell is damaged. Please repair it immediately!" The alarm logo image uses an orange circle with a built-in exclamation mark, indicating that the bottom of the battery pack has been hit, and the part of the battery panel that has been hit is displayed on the vehicle display screen.

9. The thermoplastic composite battery bottom guard plate with integrated bottom collision sensing and warning functions according to claim 3 is characterized in that: The severity level is level three. The simulated sound of the battery pack collision is played at the third volume value. The alarm message prompts "The battery pack has been hit and is seriously damaged. Please pull over as soon as possible!" The alarm logo image uses a red circle with a built-in exclamation mark and flashes continuously, indicating that the bottom of the battery pack has been hit, and the part of the battery panel that has been hit is displayed on the on-board display screen.

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