A vehicle battery protection device and a vehicle battery fault detection method

Abstract

The present invention provides a vehicle battery protection device and a vehicle battery fault detection method, which include a detection module, an alarm module and a control module arranged outside the battery; a heat dissipation mechanism arranged inside the battery, which includes an evaporation and reflux assembly and a pressing assembly. The evaporation and reflux assembly includes a conical tube, and the conical tube includes a tube body and a conical opening arranged at the top of the tube body, and the conical opening is arranged outside the battery; the pressing assembly includes an airbag structure and a driving structure, the driving structure is arranged above the airbag structure and is electrically connected to the control module, and the bottom of the tube body is inserted into the airbag structure to enable the conical tube to communicate with the airbag structure. In the vehicle battery protection device and the vehicle battery fault detection method of the present invention, by pressing the airbag structure by the driving mechanism, water is pressed into the conical tube for evaporation and heat absorption, so as to achieve the water cycle evaporation heat dissipation effect and reduce the battery temperature.

Description

Technical Field

[0001] The present invention relates to the field of battery fault detection, and particularly to a vehicle battery protection device and a vehicle battery fault detection method. Background Art

[0002] A vehicle battery is a device in an automobile that converts chemical energy into electrical energy. Batteries are divided into ordinary storage batteries, dry-charged storage batteries, and maintenance-free storage batteries. Generally, a vehicle battery refers to a lead-acid battery. The normal service life of a vehicle battery varies from 1 to 8 years, which is highly related to the condition of the vehicle. Therefore, it is very important to improve the life of the vehicle battery.

[0003] The heat generated by new energy vehicles comes from the power battery. The working current of the power battery is large, and the heat generated is also large. At the same time, the battery pack is in a relatively closed environment, which will cause the temperature of the battery to rise. When the vehicle is used for too long, a large amount of heat will accumulate in the vehicle battery. When the temperature reaches a certain high level, the insulating outer skin of the battery will be accelerated to melt, resulting in battery short circuit damage. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a vehicle battery protection device and a vehicle battery fault detection method to solve the problem in the background art that high temperature will accelerate the melting of the insulating outer skin of the battery, resulting in battery short circuit damage.

[0005] On the one hand, the present invention provides a vehicle battery protection device, which includes:

[0006] A battery detection mechanism, including a detection module, an alarm module disposed outside the battery, and a control module electrically connected to the detection module. The detection module is used to detect the wear rate and temperature of the battery. The alarm module is used to determine whether the wear rate and temperature detected by the detection module reach a threshold and issue an alarm. The control module is used to issue a control instruction according to the temperature detected by the detection module;

[0007] A heat dissipation mechanism, which is disposed inside the battery. The heat dissipation mechanism includes an evaporation and reflux component and a squeezing component. The evaporation and reflux component includes a conical tube, and the conical tube includes a tube body and a conical opening disposed at the top of the tube body, and the conical opening is disposed outside the battery;

[0008] The squeezing component includes an airbag structure and a driving structure. The bottom of the tube body is inserted into the airbag structure to make the conical tube communicate with the airbag structure; the driving structure is disposed above the airbag structure and electrically connected to the control module to squeeze the airbag structure according to the control instruction issued by the control module.

[0009] Further, the airbag structure includes a first airbag and a second airbag connected to each other;

[0010] The second airbag is disposed between the driving structure and the first airbag and is movably connected to the driving structure, and an air outlet is provided on the second airbag.

[0011] Further, the heat dissipation mechanism further includes a swinging assembly, and the swinging assembly includes an elastic member disposed at the bottom of the tapered tube and a swinging member disposed inside the tube body of the tapered tube, and the elastic member is connected to the swinging member.

[0012] Further, the elastic member includes a first spring, and the swinging member is movably connected to the bottom of the tapered tube through the first spring.

[0013] Further, a corrugated tube is provided at the bottom of the tapered tube, and the first spring is disposed inside the corrugated tube.

[0014] Further, the driving structure includes a cylinder.

[0015] Further, a shaking plate is provided between the tapered opening and the driving structure, and the shaking plate is connected to the outside of the tapered opening through a second spring.

[0016] Further, the detection module includes a first detection unit and a second detection unit; the first detection unit is used to detect the degradation rate of the battery, and the second detection unit is used to detect the temperature of the battery.

[0017] Further, the first detection unit includes a discharger, and the second detection unit includes a temperature sensor.

[0018] In the vehicle battery protection device of the present invention, by providing a heat dissipation mechanism inside the battery, the heat dissipation mechanism includes an evaporation reflux assembly and an extrusion assembly, wherein the airbag structure of the extrusion assembly will be extruded by the driving structure to drain water into the tapered tube of the evaporation reflux assembly, and the water is heated and evaporated in the tapered tube and cooled and refluxed in the tapered opening, realizing the effect of cyclic evaporation heat dissipation, avoiding the battery from generating high temperature, and thus solving the problem that the vehicle battery generates a large amount of heat during use, resulting in battery short-circuit damage in the background art.

[0019] The present invention also provides a method for detecting vehicle battery faults, and the method includes:

[0020] Obtain a battery fault judgment request, and according to the battery fault judgment request, obtain the discharge current of the vehicle battery at a first preset frequency;

[0021] Calculate the battery degradation rate according to the discharge current, and judge whether the degradation rate reaches a preset threshold;

[0022] If the degradation rate reaches the preset threshold, continue to obtain the vehicle speed and judge whether the vehicle speed reaches the preset vehicle speed;

[0023] If the vehicle speed does not reach the preset vehicle speed, issue a battery fault alarm. Description of the Drawings

[0024] Figure 1 Schematic structural diagram of the vehicle battery protection device in the first embodiment of the present invention;

[0025] Figure 2 For the present invention Figure 1 Schematic front sectional view structure;

[0026] Figure 3 For the present invention Figure 2 Schematic enlarged structure of part A in the present invention;

[0027] Figure 4 Schematic partial structure of the airbag structure of the present invention;

[0028] Figure 5 Vehicle battery fault detection method in the second embodiment of the present invention.

[0029] storage battery 100 conical tube 121 alarm module 112 conical opening 124 detection module 113 driving structure 131 control module 114 first airbag 122 heat dissipation mechanism 120 second airbag 133 first spring 231 shaking plate 135 corrugated tube 123 second spring 134 airbag structure 140 air outlet 137 swinging part 233

[0030] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. Specific Embodiments

[0031] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] Embodiment 1

[0035] As Figure 1As shown in the figure, in this embodiment, a vehicle battery protection device is provided for protecting a vehicle battery, which includes a housing. Inside the housing, there are multiple groups of batteries and a heat dissipation mechanism 120, and outside the housing, there is a battery detection mechanism. The battery detection mechanism is electrically connected to the vehicle battery to detect the usage condition of the battery. The vehicle battery is assembled by multiple storage batteries 100. After assembly, there is an opening in the middle of the vehicle battery. The battery detection mechanism is arranged outside the battery, and the heat dissipation mechanism 120 is arranged inside the opening.

[0036] The battery detection mechanism includes a detection module 113, an alarm module 112, and a control module 114. The detection module 113 includes a first detection unit and a second detection unit. Among them, the detection module 113 and the control module 114 are respectively arranged on both sides of the battery, and the alarm module 112 is arranged on the front of the battery.

[0037] The first detection unit includes a discharger, which is used to detect the discharge current of the battery, calculate the loss rate of the battery according to the discharge current. When discharging, the voltage not lower than 10V is normal. If it is lower than 10V, it proves that the battery may be short-circuited and must be replaced. The lower the voltage when adding a load, the greater the internal resistance of the battery and the worse the discharge characteristics. The second detection unit includes a temperature sensor, which is used to detect the temperature of the battery. When the detected loss rate or temperature of the battery reaches a preset threshold, it is determined that the battery is abnormal, and the alarm module 112 issues an alarm to remind the user of a battery failure. The control module 114 is electrically connected to the detection module 113 to receive the monitoring data of the detection module 113. Among them, the control module 114 includes a microprocessor, which is used to issue corresponding control instructions according to the temperature data of the detection module 113 and judge that the temperature reaches the temperature threshold.

[0038] As Figure 2 shown, the heat dissipation mechanism 120 includes an evaporation and reflux component and an extrusion component. The evaporation and reflux component includes a conical tube 121, and the conical tube 121 includes a tube body and a conical opening 124 arranged at the top of the tube body. The tube body is arranged inside the battery, and the conical opening 124 is placed outside the opening of the battery. The bottom of the conical tube 121 is connected to the extrusion component. The extrusion component includes an airbag structure 140 and a driving structure 131 arranged above the airbag structure 140. The driving structure 131 is movably connected to the airbag structure 140. Optionally, the driving structure 131 can also be fixedly connected to the airbag structure 140. The bottom of the conical tube 121 is inserted into the airbag structure 140, so that the airbag structure 140 is in communication with the bottom of the conical tube 121.

[0039] Among them, the driving structure 131 is also electrically connected to the control module 114, and moves up and down on the airbag structure according to the control instructions issued by the control module 114. Specifically, when the detection module 113 detects the vehicle battery temperature, the control module 114 determines whether the battery temperature reaches a preset threshold according to the received battery temperature data. If so, a driving instruction is sent to the driving structure to control the driving structure 131 to reciprocate up and down on the airbag structure to dissipate heat from the battery. Optionally, in this embodiment, the driving structure is a cylinder.

[0040] A certain amount of water is placed in the airbag structure 140. When the driving structure receives the driving instruction, the driving structure 131 moves up and down on the airbag structure 140. Therefore, the driving structure 131 continuously squeezes the airbag structure 140. When the airbag structure 140 is squeezed, the inside of the airbag structure 140 is closed and communicates with the bottom of the conical tube 121, and the air pressure decreases. Therefore, the water enters the tube body of the conical tube 121 from the airbag structure 140 and adheres to the inner wall of the tube body. Also, when the temperature inside the battery is too high, the water in the conical tube 121 will evaporate due to the high temperature and then rise to the conical opening 124 of the conical tube 121. The conical opening 124 is outside the battery, and there is a temperature difference between the temperature of the outside air and the high temperature inside the battery. Therefore, the water vapor will be cooled and condensed into water droplets again at the conical opening 124 by the cold air outside the battery, and then converge to the side wall of the conical opening 124 and slide down along the inclined wall of the conical opening 124 into the conical tube 121, and then flow back into the airbag structure 140 from the inside of the conical tube 121. Thus, the cycle repeats to achieve the effect of cyclic evaporation heat dissipation.

[0041] Optionally, in this embodiment, as Figure 3 shown, the heat dissipation mechanism 120 further includes a swinging assembly. The swinging assembly is arranged inside the tube body of the conical tube 121. The swinging assembly includes an elastic member arranged at the bottom of the conical tube 121 and a swinging member 233 arranged inside the tube body of the conical tube 121. The elastic member includes a corrugated tube 123 arranged at the bottom of the conical tube 121 and a first spring 231. The swinging member 233 can be an arc-shaped rod or a small ball. The corrugated tube 123 is conical, the bottom of the corrugated tube 123 is the water outlet, the first spring 231 is arranged inside the corrugated tube 123 and fixed at the water outlet, and the other end of the first spring 231 is connected to the swinging member 233.

[0042] In this embodiment, the swinging member 233 is an arc-shaped rod. When the water cools and flows back into the airbag structure 140, when the water flow passes through the water outlet, the water flow drives the first spring 231 and the arc-shaped rod to swing, so that the arc-shaped rod hits the inner wall of the conical tube 121. The impact of the arc-shaped rod accelerates the dripping of the water droplets at the top inside the conical tube 121 and accelerates the liquid circulation cooling speed.

[0043] Optionally, the airbag structure 140 includes a first airbag 122 and a second airbag 133, the first airbag 122 and the second airbag 133 are connected to each other, and the second airbag 133 is arranged between the first airbag 122 and the driving structure 131. Optionally, the first airbag 122 and the second airbag 133 can be movably connected or fixedly connected by a spring. When the second spring 133 is squeezed, the first spring 122 is squeezed at the same time.

[0044] like Figure 4 As shown, at least one air outlet 137 is provided on the second airbag 133. When the driving structure 131 squeezes the second airbag 133, the air in the second airbag 133 is blown out from the air outlet 137. The gas blown out from the second spring 133 forms an airflow inside the battery. The flow of the airflow accelerates the cooling of the inside of the battery 100. In addition, the volume of the second airbag 133 is compressed during the compression process, which drives the air outlet 137 to descend, thereby promoting more airflow.

[0045] A shaking plate 135 is also provided on the outside of the tapered opening 124 of the tapered tube 121, and the shaking plate 135 is provided between the tapered opening 124 and the driving structure 131. Optionally, the shaking plate 135 is connected to the outside of the tapered opening 124 via a second spring 134. When the vehicle is in use, the shaking plate 135 shakes up and down under the elasticity of the second spring 134 as the vehicle bumps, thereby generating airflow in the opening of the battery, accelerating the cold airflow outside the battery to pass through the inside of the battery, and the airflow can further take away the heat inside the battery, thereby improving the heat dissipation effect.

[0046] The second detection unit of the present invention has the following beneficial effects:

[0047] (1) The driving structure 131 is shaken to squeeze the gas in the second airbag 133 and blown out from the air outlet 137, so that the airflow inside the battery 100 is accelerated. The flow of airflow accelerates the dissipation of heat in the battery 100 and accelerates the cooling. In addition, the air outlet 137 follows the movement of the second airbag 133, so that the air outlet 137 can dissipate heat to multiple positions inside the battery 100, thereby ensuring the heat dissipation of the battery 100.

[0048] (2) The first airbag 122 and the conical tube 121 are seals, allowing the water flow to circulate inside. The evaporation of the water flow absorbs heat, which accelerates the temperature drop in the battery 100 and slows down the melting of the insulating layer in the battery 100. The steam rises to the top of the conical tube 121. The external temperature converts the steam into water droplets, which allows the water to be reused.

[0049] In summary, in the vehicle battery protection device in the above embodiments of the present invention, a heat dissipation mechanism is provided inside the battery. The heat dissipation mechanism includes an evaporation and reflux component and a pressing component. Among them, the airbag structure of the pressing component is squeezed by the driving structure to drain water into the conical tube of the evaporation and reflux component. The water is heated and evaporated in the conical tube and cooled and refluxed in the conical opening, achieving a circulating evaporation heat dissipation effect and avoiding the generation of additional heat. Thus, the problem that the high temperature in the background art will accelerate the melting of the insulating outer skin of the battery, resulting in battery short-circuit damage, is solved.

[0050] Embodiment Two

[0051] Please refer to Figure 5 , which shows the vehicle battery fault detection method in the second embodiment of the present invention, including steps S11 - S14.

[0052] S11. Obtain a battery fault judgment request, and according to the battery fault judgment request, obtain the discharge current of the vehicle battery at a first preset frequency.

[0053] When the vehicle is in use, the battery 11 is installed in the vehicle, and the battery powers the vehicle. The first detection mechanism monitors the battery discharge power of the vehicle in real time, and the alarm device collects the data of the monitoring module. When the vehicle is powered on, the vehicle battery enters the use state, that is, the battery fault judgment starts.

[0054] Through the discharger of the detection mechanism, the discharge current of the battery is collected at a first preset frequency, and the discharge current is collected multiple times within a preset time.

[0055] S12. Calculate the battery loss rate according to the discharge current, and judge whether the battery loss rate reaches a first preset threshold.

[0056] If the loss rate reaches the preset threshold, execute step S13.

[0057] The battery discharge current collected by the alarm device at a first preset frequency, and the battery loss rate, that is, the battery loss rate, is obtained according to the battery discharge current collected multiple times within a preset time, and it is judged whether the loss rate reaches the preset threshold.

[0058] In this embodiment, after the vehicle battery is used for a long time, the internal resistance of the battery becomes very large, and the charging speed and the discharge speed are both very fast. At this time, the no-load voltage of the vehicle battery measured by a multimeter is also normal. Therefore, the discharge speed cannot be judged only from the no-load voltage of the battery, and the discharge current of the battery needs to be measured to accurately detect the battery loss rate.

[0059] If the loss rate reaches the preset threshold, execute step S13.

[0060] S13. Continuously detect the real-time vehicle speed, obtain the preset threshold of the battery degradation speed corresponding to the real-time vehicle speed, and determine whether the battery degradation speed reaches the preset threshold of the battery degradation speed corresponding to the real-time vehicle speed.

[0061] If the battery degradation speed reaches the preset threshold of the battery degradation speed corresponding to the real-time vehicle speed, then execute step S14.

[0062] S14. Issue a battery fault alarm.

[0063] Obtain the real-time vehicle speed, detect the battery degradation speed of the vehicle at the current vehicle speed, obtain the battery degradation speed corresponding to each vehicle speed one by one, so as to establish a mapping relationship table between the vehicle speed and the preset threshold of the degradation speed. Different vehicle speeds correspond to different preset thresholds of the degradation speed. Set the preset threshold of the battery degradation speed for each vehicle speed respectively. That is, at the current vehicle speed, if the battery degradation speed of the vehicle remains within the preset threshold corresponding to the vehicle speed, the discharge speed is stable; if it exceeds the preset threshold, the battery discharge is abnormal.

[0064] If the battery degradation speed reaches the preset speed, continue to obtain the real-time vehicle speed within the preset time through the vehicle sensor, obtain the battery degradation speed threshold corresponding to the real-time vehicle speed according to the real-time vehicle speed, and judge whether the currently actually measured battery degradation speed reaches the battery discharge speed threshold corresponding to the real-time vehicle speed; if the battery degradation speed reaches the battery discharge speed threshold corresponding to the real-time vehicle speed at the same time, it means that the discharge is abnormal, issue a battery fault alarm, inform the user of the battery fault, and need to stop and check as soon as possible.

[0065] If the battery degradation speed does not reach the preset threshold of the degradation speed corresponding to the vehicle speed, it is detected that the battery status is normal.

[0066] At the same time, when the detected temperature is too high, the battery high-temperature alarm can be carried out through the alarm device 12.

[0067] In summary, the vehicle battery protection device in the above embodiments of the present invention detects the discharge speed of the vehicle battery through the first detection unit, calculates the battery degradation speed through the discharge speed. If the degradation speed reaches the preset threshold, the vehicle speed is further detected. If the battery degradation speed reaches the preset threshold corresponding to the vehicle speed, a battery fault alarm is issued to remind the user to detect the battery, avoid further damage to the battery, and improve the battery life.

[0068] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0069] The above-described embodiments merely represent several implementation manners of the present invention. The descriptions are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A vehicle battery protection device, characterized in that, The device includes: A battery detection mechanism, including a detection module, an alarm module disposed outside the battery, and a control module electrically connected to the detection module. The detection module is used to detect the degradation rate and temperature of the battery. The alarm module is used to determine whether the degradation rate and the temperature detected by the detection module reach a threshold value and issue an alarm. The control module is used to issue a control instruction according to the temperature detected by the detection module. A heat dissipation mechanism, which is disposed inside the battery. The heat dissipation mechanism includes an evaporation reflux component and a pressing component. The evaporation reflux component includes a conical tube, and the conical tube includes a tube body and a conical opening disposed at the top of the tube body, and the conical opening is disposed outside the battery. The pressing component includes an airbag structure and a driving structure. The bottom of the tube body is inserted into the airbag structure so that the conical tube is in communication with the airbag structure. The driving structure is disposed above the airbag structure and is electrically connected to the control module to press the airbag structure according to the control instruction issued by the control module. Wherein, the airbag structure includes a first airbag and a second airbag connected to each other. The second airbag is disposed between the driving structure and the first airbag and is movably connected to the driving structure, and an air outlet is provided on the second airbag.

2. The vehicle battery protection device according to claim 1, characterized in that, The heat dissipation mechanism further includes a swinging component, and the swinging component includes an elastic member disposed at the bottom of the conical tube and a swinging member disposed inside the tube body of the conical tube, and the elastic member is connected to the swinging member.

3. The vehicle battery protection device according to claim 2, characterized in that, The elastic member includes a first spring, and the swinging member is movably connected to the bottom of the conical tube through the first spring.

4. The vehicle battery protection device according to claim 3, characterized in that, A corrugated tube is provided at the bottom of the conical tube, and the first spring is disposed inside the corrugated tube.

5. The vehicle battery protection device according to claim 1, wherein The driving structure includes a cylinder.

6. The vehicle battery protection device according to claim 1, characterized in that A shaking plate is provided between the conical opening and the driving structure, and the shaking plate is connected to the outside of the conical opening through a second spring.

7. The vehicle battery protection device according to claim 1, characterized in that, The detection module includes a first detection unit and a second detection unit. The first detection unit is used to detect the degradation rate of the battery, and the second detection unit is used to detect the temperature of the battery.

8. The vehicle battery protection device according to claim 7, characterized in that, The first detection unit includes a discharger, and the second detection unit includes a temperature sensor.

9. A method for detecting vehicle battery faults, characterized in that The method is applied to the vehicle battery protection device according to any one of claims 1-8, and the method includes: Obtaining a battery fault judgment request, and according to the battery fault judgment request, obtaining the discharge current of the vehicle battery at a first preset frequency. Calculating the battery degradation rate according to the discharge current, and judging whether the battery degradation rate reaches a first preset threshold value. If the degradation rate reaches the preset threshold value, continue to detect the real-time vehicle speed, obtain the battery degradation rate preset threshold value corresponding to the real-time vehicle speed, and judge whether the battery degradation rate reaches the battery degradation rate preset threshold value corresponding to the real-time vehicle speed. If the battery degradation rate reaches the battery degradation rate preset threshold value corresponding to the real-time vehicle speed, issue a battery fault alarm.

Images