A parking air conditioner starting battery device for trucks

Abstract

The invention relates to the technical field of automobile starting batteries, and discloses a parking air-conditioning starting battery device for trucks. Aiming at the potential safety hazard of battery capacity loss and subsequent inability to ignite and start due to long-term power consumption of the air conditioner, a parking air-conditioning starting battery device may have, and a small, medium and large lithium-ion battery pack is connected in parallel to form a group and serves as a redundant backup for each other, and is switched and controlled by a self-locking metal button switch. Under normal circumstances, only the medium and large lithium-ion battery packs are put into use. When the air conditioner consumes power for a long time, resulting in battery capacity loss and inability to ignite and start, the small lithium-ion battery pack is put into the medium and large lithium-ion battery packs by pressing the self-locking metal button switch, and the two are used in parallel. The common output is used for ignition and starting of the truck, thereby ensuring the power consumption time of the parking air conditioner and the ignition and starting reserved function. At the same time, a silica gel heating film is installed, so that when the ambient temperature is too low, the battery can be automatically heated, thereby improving the low-temperature use efficiency of the starting battery.

Description

Technical Field

[0001] The invention relates to the technical field of automobile starting batteries, in particular to a parking air conditioner starting battery device for trucks. Background Art

[0002] With the development of e-commerce platforms, long-distance freight has become increasingly important in the express delivery industry, which has also increased the workload of truck drivers. According to a survey, long-distance truck drivers spend 80% of their time on the road, and 47.4% of drivers choose to spend the night in their cars. Using the original car air conditioner not only consumes a lot of fuel, but also easily wears out the engine and even has the risk of carbon monoxide poisoning. Based on this, parking air conditioners have become an indispensable companion for truck drivers to rest over long distances.

[0003] The parking air conditioner does not need to rely on the vehicle engine to start, but is directly driven by the vehicle battery, so it can run when the car is turned off, which is very convenient to use. However, the power of the vehicle battery is limited after all. If the air conditioner is turned on for a long time without starting the engine, the battery power will be insufficient, and then the vehicle will be unable to ignite and start.

[0004] At present, the main starting battery for automobile engines is still lead-acid batteries, but lead-acid batteries have the defects of low specific capacity, large size and short cycle life. With the continuous improvement of automobile intelligence, the power consumption of on-board equipment has also increased exponentially. The starting battery not only has to bear the ignition function, but also needs to undertake more tasks. For example, when parking and resting, the power can support turning on monitoring to ensure vehicle safety, listening to music and watching TV, turning on air conditioning, etc. Faced with this new demand, lead-acid batteries seem to be unable to cope with it. In recent years, with the vigorous development of the new energy vehicle industry, power lithium-ion batteries and high-rate lithium-ion battery products have become increasingly mature, and automobile engine starting batteries have also begun to gradually shift from lead-acid batteries to lithium iron phosphate batteries.

[0005] Generally speaking, the rated output voltage of lead-acid batteries on trucks is 24Vdc, and the working voltage fluctuation range is 19.2~27.6Vdc. The total power consumption of electrical equipment on trucks is about 1800~2200Kw, of which the parking air conditioner is about 1200Kw. The instantaneous ignition starting current of the truck can reach 1600~2000A, and the duration is about 3~5s. If lithium iron phosphate batteries are used instead, 8 lithium iron phosphate batteries are required to be connected in series to form a rated output voltage platform of 25.6Vdc. The battery capacity is configured according to the power consumption of the on-board equipment and the set power consumption time. The continuous use time of the parking air conditioner generally needs to reach 4~8h.

[0006] However, the existing lithium-ion batteries used as starting batteries for truck parking air conditioners on the market have a major flaw: the driver may use the air conditioner for too long without realizing it, causing a serious loss of starting battery capacity, resulting in the vehicle being unable to ignite and start. Summary of the invention

[0007] The main purpose of the present invention is to provide a parking air-conditioning starting battery device for trucks, aiming to eliminate the potential safety hazard of battery capacity loss and subsequent failure to ignite and start due to long-term power consumption of the air-conditioning.

[0008] To achieve the above-mentioned purpose, the parking air conditioner starting battery device for trucks proposed by the present invention includes a small lithium-ion battery pack, a medium lithium-ion battery pack, a large lithium-ion battery pack, a small lithium-ion battery protection board, a medium lithium-ion battery protection board, a large lithium-ion battery protection board, a self-locking metal button switch, a total positive terminal P+ and a total negative terminal P-, the rated capacity of the small lithium-ion battery pack is less than the rated capacity of the medium lithium-ion battery pack, the rated capacity of the medium lithium-ion battery pack is less than the rated capacity of the large lithium-ion battery pack, the small lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack are electrically connected in parallel, and the small lithium-ion battery protection board, the medium lithium-ion battery protection board and the large lithium-ion battery protection board are respectively connected to the small lithium The negative electrodes of the lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack are electrically connected, the total negative terminal P- is electrically connected to the small lithium-ion battery protection board, the medium lithium-ion battery protection board and the large lithium-ion battery protection board, respectively, the total positive terminal P+ is electrically connected to the positive electrodes of the small lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack, respectively, the self-locking metal button switch includes a switch K1, a switch K2 and a switch K3, the switch K1, the switch K2 and the switch K3 are electrically connected to the small lithium-ion battery protection board, the medium lithium-ion battery protection board and the large lithium-ion battery protection board, respectively, and the switching output of the small lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack is controlled by the self-locking metal button switch.

[0009] Furthermore, the small lithium-ion battery protection board includes a discharge switch tube Q11 and a charging switch tube Q12 which are electrically connected in series in sequence, and the discharge switch tube Q11 and the charging switch tube Q12 have parasitic diodes D11 and D12 connected in parallel at the source and drain electrodes, respectively. The switch K1 is a normally closed switch, and the two ends of the switch K1 are electrically connected to the gate and source of the discharge switch tube Q11, respectively.

[0010] Furthermore, the medium-sized lithium-ion battery protection board includes a discharge switch tube Q21 and a charging switch tube Q22 which are electrically connected in series in sequence, and the discharge switch tube Q21 and the charging switch tube Q22 have parasitic diodes D21 and D22 connected in parallel at the source and drain electrodes, respectively. The switch K2 is a normally open switch, and the two ends of the switch K2 are electrically connected to the gate and source of the charging switch tube Q22, respectively.

[0011] Furthermore, the large lithium-ion battery protection board includes a discharge switch tube Q31 and a charging switch tube Q32 which are electrically connected in series in sequence, and the discharge switch tube Q31 and the charging switch tube Q32 have parasitic diodes D31 and D32 connected in parallel at the source and drain electrodes, respectively. The switch K3 is a normally open switch, and the two ends of the switch K3 are electrically connected to the gate and source of the charging switch tube Q32, respectively.

[0012] Furthermore, it also includes a silicone heating film and a temperature control switch, the temperature control switch adopts a normally closed low-temperature temperature control switch with a trigger temperature of 0°C, the silicone heating film and the temperature control switch are electrically connected in series, and the other ends of the silicone heating film and the temperature control switch are electrically connected to the total positive terminal P+ and the total negative terminal P- respectively.

[0013] Furthermore, it also includes an LCD digital display voltmeter, and two ends of the LCD digital display voltmeter are electrically connected to the total positive terminal P+ and the total negative terminal P- respectively.

[0014] Furthermore, the small lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack are all composed of 8 high-rate lithium iron phosphate cells connected in series.

[0015] The technical solution of the present invention has the following beneficial effects:

[0016] 1. The present invention adopts three lithium-ion battery packs, small, medium and large, connected in parallel to form a parking air conditioner starting battery power source. The three lithium-ion battery packs are mutually redundant backups and are switched and controlled by a self-locking metal button switch to ensure the parking air conditioner power consumption time and ignition start reserve function, which completely solves the potential safety hazard of the existing parking air conditioner starting battery, that is, the battery capacity loss due to long-term power consumption of the air conditioner, and the subsequent inability to ignite and start;

[0017] 2. The present invention realizes automatic heating of the starting battery in a low-temperature environment by installing a silica gel heating film inside the starting battery of the parking air conditioner, thereby improving the low-temperature use efficiency of the starting battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the module connection structure of a parking air conditioner starting battery device for a truck proposed by the present invention;

[0020] Figure 2 This is an electrical control principle diagram of a parking air conditioner starting battery device for trucks proposed by the present invention.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The invention provides a parking air conditioner starting battery device for a truck.

[0026] like Figure 1 and Figure 2As shown, in one embodiment of the present invention, the truck parking air conditioner starting battery device includes three lithium-ion battery packs: a small lithium-ion battery pack, a medium lithium-ion battery pack and a large lithium-ion battery pack. The three lithium-ion battery packs are all grouped with 8 high-rate lithium iron phosphate cells connected in series to form a rated output voltage platform of 25.6Vdc. The battery capacity is configured according to the power consumption of the on-board equipment and the set power consumption time. The rated capacity of the small lithium-ion battery pack is smaller than that of the medium lithium-ion battery pack, and the rated capacity of the medium lithium-ion battery pack is smaller than that of the large lithium-ion battery pack. However, the total energy released by the medium lithium-ion battery pack and the large lithium-ion battery pack must ensure that the parking air conditioner can be used continuously for 4 to 8 hours.

[0027] All three lithium-ion battery packs need to be equipped with lithium-ion battery protection boards to collect and monitor their cell voltage, temperature, and charge and discharge current to prevent battery failures such as overcharging, overdischarging, overtemperature, overcurrent, and short circuit, and ensure that each battery pack always operates within the normal threshold range. The lithium-ion battery protection board is connected in series to the negative electrode of the lithium-ion battery pack. The three lithium-ion battery packs are connected in series to the protection board and then connected in parallel to form a total positive electrode P+ and a total negative electrode P-, which are provided to the parking air conditioner and ignition starter.

[0028] Lithium-ion batteries are not allowed to be charged below zero degrees Celsius, and their discharge performance will also be greatly affected in low temperature environments. Therefore, when a truck travels to the coldest areas in the north or encounters ice and snow and low temperature weather, ignition failure may occur, thereby reducing the comfort and riding experience of the driver and passengers. Therefore, it is particularly necessary to add a heating auxiliary function to the battery. The silicone heating film is connected in series with the temperature control switch and placed at the bottom of the battery pack. The heating film is powered by the lithium-ion battery pack. The temperature control switch uses a normally closed low-temperature temperature control switch with a trigger temperature of 0°C. When the battery pack temperature is below 0°C, the contacts of the temperature control switch are closed, the heating circuit is turned on and starts working, and the battery pack temperature will gradually rise. When the battery pack temperature is higher than 0°C, the contacts of the temperature control switch will be disconnected, thereby closing the heating circuit.

[0029] The LCD digital voltmeter is connected between the total positive electrode P+ and the total negative electrode P- of the starting battery to display the output voltage of the starting battery in real time. The self-locking metal button switch is used to control the switching output of the three lithium-ion battery packs. Under normal use, the button switch is in the released state, that is, the pop-up state. At this time, the output of the small lithium-ion battery pack is interrupted, and the medium lithium-ion battery pack and the large lithium-ion battery pack are connected in parallel as power output; and when the button switch is pressed, the small lithium-ion battery pack will be put into the medium lithium-ion battery pack and the large lithium-ion battery pack for parallel output.

[0030] The electrical control principle of the parking air conditioner starting battery proposed by the present invention is as follows Figure 2As shown, the power supply control method and working process are described in detail as follows:

[0031] (1) Under normal circumstances, the self-locking metal button switch is in the released state, the gate-source bipolar control switch K1 of the discharge switch tube Q11 in the small lithium-ion battery protection board is closed, and V GS(Q11) The discharge switch Q11 is short-circuited, and the main discharge circuit of the small lithium-ion battery pack is disconnected; the gate-source bipolar control switch K2 of the charging switch Q22 in the medium lithium-ion battery protection board is disconnected, and the gate-source bipolar control switch K3 of the charging switch Q32 in the large lithium-ion battery protection board is disconnected, V GS(22) and V GS(32) Normal, the main discharge circuits of the medium-sized lithium-ion battery pack and the large-sized lithium-ion battery pack are connected and output power to the parking air conditioner and ignition starter;

[0032] (2) When the air conditioner has been used for too long, causing the battery capacity to be seriously depleted and the truck cannot be ignited and started, the self-locking metal button switch is pressed, and the gate-source bipolar control switch K1 of the discharge switch tube Q11 in the small lithium-ion battery protection board is disconnected, and V GS(Q11) Return to normal, the discharge switch tube Q11 is closed, and the main discharge circuit of the small lithium-ion battery pack is turned on; the gate-source bipolar control switch K2 of the charging switch tube Q22 in the medium lithium-ion battery protection board is closed, and the gate-source bipolar control switch K3 of the charging switch tube Q32 in the large lithium-ion battery protection board is also closed, V GS(22) and V GS(32) The short circuit causes the charging switch tubes Q22 and Q32 to be disconnected, and the charging main circuits of the medium-sized lithium-ion battery pack and the large-sized lithium-ion battery pack are disconnected, but the main discharge circuit can still remain in the on state through the parasitic diodes D22 and D32 inside Q22 and Q32. The small, medium and large battery packs are turned on at the same time, and the parallel output is used for ignition starting;

[0033] (3) When the self-locking metal button switch is in the released state, the small lithium-ion battery pack cannot be discharged and is on standby, but can be charged, while the medium and large lithium-ion battery packs can be charged and discharged at the same time. At this time, the LCD digital display voltmeter displays the total pressure of the medium and large lithium-ion battery packs connected in parallel; when the self-locking metal button switch is pressed, the small lithium-ion battery pack can be charged and discharged at the same time, while the medium and large lithium-ion battery packs can only be discharged and cannot be charged. At this time, the LCD digital display voltmeter displays the total pressure of the small, medium and large battery packs connected in parallel;

[0034] (4) When the battery temperature is below zero degrees Celsius, the temperature control switch contacts are closed, the silicone heating film is energized, the heating circuit is turned on and starts working, and the battery temperature gradually rises. When the battery temperature rises above zero degrees Celsius, the temperature control switch contacts are disconnected and the heating circuit is closed.

[0035] Specifically, the present invention aims at the potential safety hazard of the current parking air conditioner starting battery, which may cause the battery capacity to be lost due to the long-term power consumption of the air conditioner, and then fail to ignite and start. The present invention proposes a parking air conditioner starting battery for trucks and a power supply control method. The parking air conditioner starting battery power supply is composed of three lithium-ion battery packs, small, medium and large, connected in parallel. The three lithium-ion battery packs are redundant backups for each other and are switched and controlled by a self-locking metal button switch. Under normal circumstances, the medium lithium-ion battery pack and the large lithium-ion battery pack are connected in parallel and used as power output for air conditioning power consumption and ignition and starting. When the air conditioner consumes power for a long time, resulting in a loss of battery capacity and failing to ignite and start, the small lithium-ion battery pack can be put into the medium lithium-ion battery pack and the large lithium-ion battery pack by pressing the self-locking metal button switch, and the common output is used for truck ignition and starting, thereby ensuring the power consumption time of the parking air conditioner and the ignition and starting reserved function. At the same time, a silicone heating film is installed under the lithium-ion battery pack. When the ambient temperature is too low, the battery can be automatically heated, thereby improving the low-temperature use efficiency of the starting battery.

[0036] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A parking air conditioner starting battery device for a truck, characterized in that: It includes a small lithium-ion battery pack, a medium lithium-ion battery pack, a large lithium-ion battery pack, a small lithium-ion battery protection board, a medium lithium-ion battery protection board, a large lithium-ion battery protection board, a self-locking metal button switch, a total positive terminal P+ and a total negative terminal P-, the rated capacity of the small lithium-ion battery pack is less than the rated capacity of the medium lithium-ion battery pack, the rated capacity of the medium lithium-ion battery pack is less than the rated capacity of the large lithium-ion battery pack, the small lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack are electrically connected in parallel, The small lithium-ion battery protection board, the medium lithium-ion battery protection board and the large lithium-ion battery protection board are respectively electrically connected to the negative electrodes of the small lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack, the total negative terminal P- is respectively electrically connected to the small lithium-ion battery protection board, the medium lithium-ion battery protection board and the large lithium-ion battery protection board, the total positive terminal P+ is respectively electrically connected to the positive electrodes of the small lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack, the self-locking metal button switch includes a switch K1, a switch K2 and switch K3, the switches K1, K2 and K3 are electrically connected to the small lithium-ion battery protection board, the medium lithium-ion battery protection board and the large lithium-ion battery protection board respectively, and the switching output of the small lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack is controlled by the self-locking metal button switch. The small lithium-ion battery protection board includes a discharge switch tube Q11 and a charging switch tube Q12 which are electrically connected in series in sequence, and the discharge switch tube Q11 and the charging switch tube Q12 have parasitic diodes connected in parallel at the source and drain electrodes respectively. D11 and parasitic diode D12, the switch K1 is a normally closed switch, and the two ends of the switch K1 are electrically connected to the gate and source of the discharge switch tube Q11 respectively; the medium-sized lithium-ion battery protection board includes a discharge switch tube Q21 and a charging switch tube Q22 which are electrically connected in series in sequence, and the discharge switch tube Q21 and the charging switch tube Q22 have parasitic diodes D21 and D22 connected in parallel at the source and drain electrodes respectively inside, the switch K2 is a normally open switch, and the two ends of the switch K2 are electrically connected to the gate and source of the charging switch tube Q22 respectively; The large lithium-ion battery protection board includes a discharge switch tube Q31 and a charging switch tube Q32 which are electrically connected in series in sequence, and the discharge switch tube Q31 and the charging switch tube Q32 have parasitic diodes D31 and D32 connected in parallel at the source and drain electrodes, respectively. The switch K3 is a normally open switch, and the two ends of the switch K3 are electrically connected to the gate and source of the charging switch tube Q32, respectively.

2. The parking air conditioner starting battery device for trucks according to claim 1, characterized in that: It also includes a silicone heating film and a temperature control switch. The temperature control switch adopts a normally closed low-temperature temperature control switch with a trigger temperature of 0°C. The silicone heating film and the temperature control switch are electrically connected in series, and the other ends of the silicone heating film and the temperature control switch are electrically connected to the total positive terminal P+ and the total negative terminal P- respectively.

3. The parking air conditioner starting battery device for trucks according to claim 1, characterized in that: It also includes an LCD digital display voltmeter, and two ends of the LCD digital display voltmeter are electrically connected to the total positive terminal P+ and the total negative terminal P- respectively.

4. The parking air conditioner starting battery device for trucks according to claim 1, characterized in that: The small lithium-ion battery pack, the medium lithium-ion battery pack and the large lithium-ion battery pack are all composed of 8 high-rate lithium iron phosphate cells connected in series.

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