CN108749617B - Replaceable battery control system of electric automobile - Google Patents
Replaceable battery control system of electric automobile Download PDFInfo
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- CN108749617B CN108749617B CN201810594428.1A CN201810594428A CN108749617B CN 108749617 B CN108749617 B CN 108749617B CN 201810594428 A CN201810594428 A CN 201810594428A CN 108749617 B CN108749617 B CN 108749617B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Abstract
The invention provides a replaceable battery control system of an electric automobile, and belongs to the technical field of battery replacement of the electric automobile. It has been solved and is difficult to guarantee the electric quantity of the battery package of fixed setting and can not the problem of continuation of the journey fast among the prior art. This electric automobile's removable electricity battery control system, including controller, electronic switch module, the first battery of detachable package, fixed second battery package, first module of charging, charge port and the port of discharging, the port of discharging passes through the electronic switch module by first battery package and/or the power supply of second battery package, this electric automobile's removable electricity battery control system still includes the second module of charging, the second module of charging is supplied power by first battery package for to the charging of second battery package, the controller is used for control the second charge the module with the electronic switch module. The invention preferentially keeps the electric quantity in the fixedly arranged battery pack.
Description
Technical Field
The invention belongs to the technical field of electric automobile battery replacement, and relates to a replaceable battery control system of an electric automobile.
Background
Based on the requirements of environmental and energy factors, new energy automobiles are the main direction of development, wherein electric automobiles are the main force of new energy automobiles. The length and supplement of the mileage are important factors for restricting the development of the electric automobile, and the problems of time consumption of mileage supplement, short endurance mileage and the like generally exist in the conventional electric automobile.
At present, the mileage of the electric automobile is mainly solved in three ways, one way is to develop a battery cell technology and improve the energy density of the battery cell to achieve the effect of improving the endurance mileage of the new energy automobile; one is that the fast charging is developed to realize the fast supplement of the endurance mileage, thereby greatly shortening the time required by the endurance mileage supplement; and the other method is to supplement the mileage of the new energy automobile by replacing the battery through a battery replacement technology.
In the prior art, the research on the battery replacement technology is less, the battery replacement structure design of the battery system is not reasonable enough, and the superiority of the battery replacement technology cannot be fully embodied. For example, the battery pack quick-change control system of an electric vehicle disclosed in chinese patent application No. CN201510680016.6 is disclosed in the patent, in which a battery pack is replaced by a locking mechanism and a tray jacking mechanism, and the battery pack quick-change is realized by electrically controlling the battery replacement process. However, the battery replacement provided by the patent is to replace the whole battery pack, so that the use cost of the battery pack is high, the risk of battery replacement is too high, the whole battery pack is high in quality, the requirement on the power replacement technology is high, and meanwhile, a consumer cannot fully utilize the electric quantity in the battery pack. Therefore, in the prior art, the battery pack is inconvenient to replace, and after the battery pack is replaced, the battery pack is not reasonably used by a corresponding control system, so that the maximum endurance mileage of the battery pack is kept.
In the prior art, two battery packs are most commonly used for improving the maximum, one battery pack is used as a fixed battery, and the other battery pack is used as a standby battery, for example, a dual-power battery pack and an electric automobile with the application number of CN201721193450.2 disclosed by national patent documents are provided, the dual-power battery pack comprises a main battery pack bin and an auxiliary battery pack bin, the main battery pack bin is fixed in the electric automobile and comprises a main battery pack and a first switch unit, the auxiliary battery pack bin is detachably installed in the electric automobile and comprises an auxiliary battery pack and a second switch unit, the main battery pack and the auxiliary battery pack are connected in parallel to form a charging and discharging path with the stroke comprising main path auxiliary path force and a public path, the residual electric quantity of the main battery pack is detected firstly during discharging, and when the residual electric quantity is smaller than a preset threshold value or the main battery pack breaks down, the control unit controls the auxiliary battery pack to. Although this patent can improve battery package total capacity, it needs to charge for a long time to only can use the reserve battery package after main battery package electricity is used up, just also only two battery package whole electric quantities are used up, just can change the reserve battery package, even change the reserve battery package moreover, its main battery package still need charge at the charging station, consume a large amount of time, consequently can not trade the electricity fast, realize quick continuation of the journey purpose.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a replaceable battery control system of an electric automobile, which can quickly supplement the endurance mileage, can fully utilize the electric quantity in a replaceable battery pack, and can be widely popularized and established into a replacement station according with the use habits of consumers.
The purpose of the invention can be realized by the following technical scheme: the utility model provides an electric automobile's removable electricity battery control system, includes controller, electronic switch module, the first battery of detachable package, fixed second battery package, first module of charging, the port of charging and the port of discharging, the port of discharging passes through the electronic switch module by first battery package and/or the power supply of second battery package, its characterized in that, this electric automobile's removable electricity battery control system still includes the second module of charging, the second module of charging is supplied power by first battery package for to the charging of second battery package, the controller is used for control the second charge the module with the electronic switch module.
This but power-changing battery control system of electric automobile is through setting up the battery package into two first battery packages and the second battery package independent each other, and not increase the battery package on original basis, but carry out the split to the battery package of original size, thereby make the quality of single battery package reduce by a wide margin, and only first battery package can dismantle the change, make change battery package operation comparatively convenient quick, can make the second battery package place according to the design of car enterprise through the aforesaid setting, only do unified design regulation to first battery package, conveniently trade the electric technology, the automation mechanized operation of enterprise is striden to equipment. In addition, the first battery pack can be detached, and the first battery pack can be quickly replaced to supplement the electric quantity of the electric automobile through a battery replacement technology, so that the capacity of the first battery pack and the capacity of the second battery pack can be reduced, the first battery pack and the second battery pack have smaller sizes, and the cost is lower. The battery pack with larger capacity does not need to be selected to ensure the endurance mileage like the traditional electric vehicle, and the charging time is avoided in the using process.
This control system rationalizes the management to two battery packages on the basis of first battery package and second battery package design, through setting up the second module of charging, make first battery package can charge to the second battery package, thereby guarantee to keep the electric quantity in the fixed second battery package that sets up, and the electric quantity of first battery package is preferred to be used, because first battery package can be dismantled and trade the electricity operation, thereby change the back with first battery package, the vehicle just can travel and need not charge to the battery package of fixed setting through filling electric pile as same certainly for prior art, consequently this control system can trade the electricity fast, fast continuation of the journey.
In daily driving, a consumer can obtain infinite endurance mileage by frequently replacing batteries at a battery replacement station, and the time spent in the battery replacement process can be as low as several minutes to reach the speed of refueling the fuel vehicle. Although the traditional battery replacement mode electric automobile can achieve similar effects, the traditional battery replacement mode electric automobile generally has the problem of anxiety of endurance mileage, and the battery replacement mode electric automobile usually selects to replace the battery when the residual electric quantity of the battery pack is about 40%. Therefore, the battery pack of the traditional battery replacement mode electric vehicle only utilizes about 60%, and the capacity utilization rate of the battery pack is extremely low, so that the problems of large size and high cost of the battery pack are caused. The replaceable battery control system of the electric automobile can effectively solve the problems by arranging the second charging module, the first battery pack which can be detachably replaced and the second battery pack which is fixed. The first battery pack is used for driving the electric automobile, and the second battery pack can be charged through the second charging module. When the driver judges that the driver drives into the battery replacement station, the driver can drive the second charging module to transfer the electric quantity in the first battery pack into the second battery pack, and the first battery pack is ensured to have lower electric quantity before battery replacement, so that the battery replacement efficiency is improved. The time for replacing the battery in the mode is not solved by the residual electric quantity in the battery pack any more, but is freely determined by a driver. The electric automobile is changed from passive to active, which is the point of great importance for influencing the experience of consumers, namely the design of the replaceable battery control system of the electric automobile is humanized, the use experience of the consumers can be improved, the use habits of the consumers are met, and the popularization of the electric automobile is facilitated.
In idle time, operating personnel also can carry out whole charging to first battery package and second battery package through first module of charging, increases the selectivity of driver's continuation of the journey mode.
In foretell electric automobile's interchangeable electricity battery control system, still include control input module, control input module with the input of controller links to each other, the output of controller is connected with the relay, and the normally open switch of relay connects second module and the second battery package of charging respectively, the switching of relay is controlled according to the signal control input module input to the controller. The second charging module and the second battery pack are switched on and off by arranging the relay, when a normally open switch of the relay is closed, the first battery pack is communicated with the second charging module and the second battery pack, and the first battery pack charges the second battery pack. The driver can input control information through the control input module, and the on-off control of the relay is determined by the control information input by the control input module.
In the above-mentioned replaceable battery control system of an electric vehicle, the replaceable battery control system of an electric vehicle further includes an electric quantity detection module, where the electric quantity detection module is configured to detect remaining electric quantities of the first battery pack and the second battery pack and send detection information to the controller. The electric quantity detection module works periodically, detects the residual electric quantity of the first battery pack and the second battery pack and sends the residual electric quantity to the controller, so that the controller can obtain the electric quantity information of the first battery pack and the second battery pack.
In the above-mentioned replaceable battery control system for an electric vehicle, there are two electronic switch modules, the electronic switch modules are connected to the output end of the controller, the output end of the first battery pack is connected to the discharge port through one of the electronic switch modules, and the output end of the second battery pack is connected to the discharge port through the other electronic switch module. The on-off of the first battery pack, the second battery pack and the discharge port is controlled through the two electronic switch modules. And two electronic switch modules are provided to facilitate the control operation of the controller.
In the above-mentioned removable battery control system of electric automobile, the controller compares the remaining total electric quantity of first battery package and second battery package, the remaining electric quantity of second battery package and the remaining electric quantity of first battery package with the corresponding predetermined electric quantity lower limit value according to the detection information in proper order, and the power supply of discharge port is switched through the electronic switch module to the controller according to the comparison result, and when satisfying remaining total electric quantity simultaneously, the respective remaining electric quantity of first battery package and second battery package is all sufficient, the controller preferentially selects discharge port and is supplied power by first battery package alone and works.
The total residual electric quantity and the independent residual electric quantity are judged and compared with the preset electric quantity lower limit value respectively to obtain the battery pack which needs to output the electric quantity currently to provide power for the whole vehicle, so the control system can reasonably manage the battery pack according to different residual electric quantities, select different discharging modes and ensure the maximum endurance mileage. And will be in remaining total electric quantity, the surface electric quantity is sufficient when the residual electric quantity of second battery package and first battery package is equallyd divide and is greater than its corresponding electric quantity lower limit value respectively, the electric quantity in using first battery package is preferred to this moment, thereby can use the electric quantity in the first battery package fast, reserve the electric quantity of second battery package earlier, when trading the place lacked the electricity of using up the electricity of first battery package reuse the electricity of second battery package, thereby obtain the biggest continuation of the journey mileage, and through the electricity of preferred use first battery package, can continue a journey fast after changing first battery package, can not charge, save time.
In the system for controlling the replaceable battery of the electric vehicle, an electric quantity lower limit value K1 is preset in the controller, when the controller judges that the remaining total electric quantity of the first battery pack and the second battery pack in the current detection information is smaller than the electric quantity lower limit value K1, the controller selects one of the first battery pack and the second battery pack to be communicated with the discharge port, the other battery pack is disconnected with the discharge port, and the controller does not perform the next comparison work on the detection information;
the controller is preset with an electric quantity lower limit value K2, when the controller judges that the remaining total electric quantity of the first battery pack and the second battery pack in the current detection information is greater than the electric quantity lower limit value K1 and the remaining electric quantity of the second battery pack is less than the electric quantity lower limit value K2, the controller controls the first battery pack to be communicated with the discharge port, the second battery pack is disconnected with the discharge port, and the controller does not perform the next comparison work on the detection information;
the controller is preset with an electric quantity lower limit value K3, the input end of the controller is connected with a control input module, when the controller judges that the remaining total electric quantity of the first battery pack and the second battery pack in the current detection information is greater than an electric quantity lower limit value K1 and the remaining electric quantity of the second battery pack is greater than an electric quantity lower limit value K2, the controller compares the first battery remaining electric quantity with an electric quantity lower limit value K3, and when the first battery pack is less than the electric quantity lower limit value K3, the controller only controls the second battery pack to be communicated with a discharge port; when the power supply of the first battery is larger than the electric quantity lower limit value K3, the controller controls the alarm prompting module to send out an electric quantity sufficiency prompt, and the controller receives a control signal sent by the control input module and controls the on-off of the first battery pack and the discharge port and the on-off of the second battery pack and the discharge port.
Under the condition of different residual total electric quantity and different respective residual electric quantity of the first battery pack and the second battery pack, the on-off of the first battery pack and the second battery pack and the discharging port are controlled respectively, and an optimal power supply mode is ensured.
In the replaceable battery control system of the electric automobile, the first battery pack and the second battery pack are respectively provided with a temperature sensor, the temperature sensors are connected with the input end of the controller, the controller receives signals sent by the temperature sensors, and the controller controls the electronic switch module according to the received detected temperature. When the controller judges that the remaining total electric quantity of the first battery pack and the second battery pack in the current detection information is smaller than the electric quantity lower limit value K1, the controller judges the detection temperature sent by the temperature sensor, and the controller controls the smaller one of the first battery pack and the second battery pack to be communicated with the discharge port. The battery pack generates temperature when in work, the higher the temperature is, the discharge of the battery pack can be influenced, generally, the discharge can be accelerated, in order to improve the maximum endurance mileage, when the remaining total electric quantity of the first battery pack and the second battery pack is smaller than an electric quantity lower limit value K1, the lower temperature of the first battery pack and the second battery pack is selected for power supply work, and after the electric quantity of one battery pack is exhausted, the rest battery packs are selected for work.
In the replaceable battery control system of the electric vehicle, the controller is connected with an alarm prompting module, and the controller controls the alarm prompting module to give an alarm when the controller judges that the remaining total electric quantity of the first battery pack and the second battery pack in the current detection information is less than the electric quantity lower limit value K1. The alarm prompting module gives an alarm when the remaining total electric quantity is smaller than the electric quantity lower limit value K1, so that a driver is reminded to replace or charge, and the condition that all electric quantities are exhausted is avoided.
In the rechargeable battery control system of the electric vehicle, when the controller determines that the remaining total electric quantity of the first battery pack and the remaining total electric quantity of the second battery pack in the current detection information is greater than the electric quantity lower limit value K1 and the remaining electric quantity of the second battery pack is less than the electric quantity lower limit value K2, the controller controls the alarm prompting module to prompt whether to start the second charging module. Under the circumstances, the electric quantity of the first battery pack is sufficient, but the second battery pack is charged, mileage loss can be caused, so that whether a driver starts the second charging module is prompted through the alarm prompting module, the driver enables the controller to control the relay to be closed through a signal input by the control input module, the second charging module works, the first battery pack charges the second battery pack, and the second charging module stops working when the first battery pack is smaller than the electric quantity lower limit value K3.
In the replaceable battery control system of the electric automobile, the first battery pack adopts a lithium iron phosphate battery cell, and the second battery pack adopts a ternary battery cell. Make first battery package and second battery package all have better operating temperature through above-mentioned setting, improve the operating performance of first battery package and second battery package.
Compared with the prior art, this electric automobile's removable battery control system has following advantage:
1. according to the invention, the second charging module is arranged, so that the first battery pack can charge the second battery pack, the electric quantity in the fixedly arranged second battery pack is ensured to be kept, the electric quantity of the first battery pack is preferentially used, and the first battery pack can be detached to carry out the electricity changing operation, so that the vehicle can run after the first battery pack is replaced, and the fixedly arranged battery pack is not required to be charged through the charging pile as in the prior art, so that the control system can quickly change the electricity and can quickly continue the journey.
2. According to the invention, under the conditions of different residual total electric quantity and different respective residual electric quantity of the first battery pack and the second battery pack, the on-off of the first battery pack and the second battery pack with the discharge port is controlled, so that the optimal power supply mode is ensured.
Drawings
Fig. 1 is a schematic diagram of the circuit connection of the present invention.
FIG. 2 is a schematic diagram of the main control flow of the present invention.
In the figure, 1, a controller; 2. an electric quantity detection module; 3. a discharge port; 4. a first battery pack; 5. a second battery pack; 6. an electronic switch module; 7. a temperature sensor; 8. an alarm prompt module; 9. a control input module; 10. a first charging module; 11. a second charging module; 12. a charging port; 13. a relay.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, a replaceable battery control system for an electric vehicle includes a controller 1, an electric quantity detection module 2, a discharge port 3, and a battery pack for supplying power to the electric vehicle, where the electric quantity detection module 2 is connected to an input end of the controller 1. The battery pack comprises a first battery pack 4 detachably arranged in the electric automobile and a second battery pack 5 fixed in the electric automobile. The first battery pack 4 and the second battery pack 5 are respectively connected with the electric quantity detection module 2. The output ends of the first battery pack 4 and the second battery pack 5 are respectively connected with the discharge port 3, an electronic switch module 6 is connected between the first battery pack 4 and the discharge port 3 and between the second battery pack 5 and the discharge port 3, and the electronic switch module 6 is connected with the output end of the controller 1. The electronic switch module 6 may be an electronic switch circuit composed of a relay, a triode, or a MOS transistor, which is an existing module. The electric quantity detection module 2 is an existing module, and the electric quantity of the battery which can be detected by the electric quantity detection module 2 is the prior art.
The first battery pack 4 and the second battery pack 5 are respectively provided with a temperature sensor 7, and the temperature sensors 7 are connected with the input end of the controller 1. The output end of the controller 1 is also connected with an alarm prompt module 8, and the input end of the controller 1 is connected with a control input module 9. Preferably, the alarm prompt module 8 and the control input module 9 are both touch display screens. As another scheme, the alarm prompt module 8 is a loudspeaker, the control input module 9 is a keyboard, and a plurality of selection keys are arranged on the keyboard.
As shown in fig. 1, the system for controlling a rechargeable battery of an electric vehicle further includes a first charging module 10, a second charging module 11 and a charging port 12, wherein the input end of the first charging module 10 is connected to the charging port 12, the output end of the first charging module is connected to the first battery pack 4 and the second battery pack 5, the second charging module 11 is connected to the output end of the first battery pack 4 and the input end of the second battery pack 5, the output end of the controller 1 is connected to a relay 13, and a normally open switch of the relay 13 is connected to the second charging module 11 and the second battery pack 5. The first charging module 10 and the second charging module 11 are battery charging modules in the prior art. As another scheme, an electronic switch for turning on/off the second charging module 11 is integrated in the second charging module 11, and the controller 1 controls the electronic switch in the second charging module 11 to control the turning on/off of the second charging module.
Cooling modules are respectively arranged in the first battery pack 4 and the second battery pack 5, and a lithium iron phosphate core is adopted in the first battery pack 4, so that the first battery pack 4 has a better operating temperature; the second battery pack 5 adopts a ternary battery core with higher power.
The control process of the present invention is as follows:
as shown in fig. 2, after the electric vehicle is started, the electric quantity detection module 2 is powered on, and periodically detects the remaining electric quantities of the first battery pack 4 and the second battery pack 5, detects the remaining electric quantities of the first battery pack 4 and the second battery pack 5 each time, and sends detection information to the controller 1. Preferably, the detection period of the current detection module is in the range of 10 to 30 minutes for detection once.
The controller 1 is preset with an electric quantity lower limit value K1, an electric quantity lower limit value K2 and an electric quantity lower limit value K3. The lower limit value K1 is in the range of 10% to 30% of the total capacity of the first battery pack 4 and the second battery pack 5; the lower limit value K2 is in the range of 10% to 30% of the total capacity of the second battery pack 5; the lower limit value K3 is in the range of 10% to 30% of the total capacity of the first battery pack 4. The lower limit value K1 is preferably 20% of the total capacity of the first battery pack 4 and the second battery pack 5; the lower electric quantity limit value K2 is 20% of the total capacity of the second battery pack 5; the lower limit electric quantity K3 is 20% of the total capacity of the first battery pack 4.
The controller 1 receives the detection information sent by the electric quantity detection module 2 and then judges to obtain the residual total electric quantity of the first battery pack 4 and the second battery pack 5, the residual electric quantity of the second battery pack 5 and the residual electric quantity of the first battery pack 4. The controller 1 compares the remaining total power of the first battery pack 4 and the second battery pack 5 with the power lower limit value K1, and does not perform the next comparison when the remaining total power of the first battery pack 4 and the second battery pack 5 is less than the power lower limit value K1. And the controller 1 enters a maximum driving mileage mode, the controller 1 selects one of the first battery pack 4 and the second battery pack 5 to be communicated with the discharge port 3, the other battery pack is disconnected from the discharge port 3, the self temperature of the first sensor and the second sensor sent by the temperature sensor 7 is selected as the basis, the power supply operation is performed by selecting the lower temperature of the first battery pack 4 and the second battery pack 5, and the rest battery packs are selected to operate after the electric quantity of one battery pack is exhausted. After the controller 1 determines the battery pack to be communicated with the discharge port 3, the controller 1 controls the electronic switch module 6 corresponding to the battery pack to be communicated to be conducted, and if the first battery pack 4 needs to be communicated with the discharge port 3, the controller 1 controls the electronic switch module 6 connected with the first battery pack 4 to be closed and conducted.
When the remaining total electric quantity of the first battery pack 4 and the second battery pack 5 in the current detection information is judged to be smaller than the electric quantity lower limit value K1, the controller 1 further controls the alarm prompting module 8 to give an alarm, and the alarm prompting module 8 gives an alarm when the remaining total electric quantity is smaller than the electric quantity lower limit value K1, so that a driver is reminded to carry out electricity replacement or charging operation as soon as possible, and the situation that all electric quantities are exhausted is avoided.
When the remaining total electric quantity of the first battery pack 4 and the second battery pack 5 is greater than the electric quantity lower limit value K1, the remaining electric quantity of the second battery pack 5 is compared with the electric quantity lower limit value K2, and at this time, when the remaining electric quantity of the second battery pack 5 is satisfied at the electric quantity lower limit value K2, the controller 1 enters the maximum cruising range, at this time, the controller 1 controls the first battery pack 4 to be communicated with the discharge port 3, the second battery pack 5 is disconnected from the discharge port 3, and the controller 1 does not perform the next comparison work on the detection information. In the above case, the first battery pack 4 is sufficiently charged, but the second battery pack 5 is charged, which results in a loss of mileage. At this time, the driver is prompted by the alarm prompting module 8 whether to start the second charging module 11. When the driver selects to start the second charging module 11, the controller 1 receives a control signal sent by the input module of the controller 1, at this time, the controller 1 controls the normally open switch of the relay 13 to be closed, so that the second charging module 11 works, the first battery pack 4 charges the second battery pack 5, and the second charging module 11 stops working when the first battery pack 4 is smaller than the electric quantity lower limit value K3.
When the total remaining capacity of the first battery pack 4 and the second battery pack 5 is greater than the capacity lower limit value K1 and the remaining capacity of the second battery pack 5 is greater than the capacity lower limit value K2, the controller 1 compares the first remaining capacity of the battery with the capacity lower limit value K3, and when the first battery pack 4 is less than the capacity lower limit value K3, the controller 1 only controls the second battery pack 5 to communicate with the discharge port 3; when the electric quantity of the first battery pack 4 is greater than the electric quantity lower limit value K3, the controller 1 controls the alarm prompting module 8 to give out an electric quantity sufficiency prompt, and the controller 1 receives the control signal sent by the control input module 9 to control the on-off of the first battery pack 4 and the discharge port 3 and the on-off of the second battery pack 5 and the discharge port 3. When the controller 1 does not receive the control signal sent by the control input module 9, the controller 1 defaults to the first battery pack 4 for power supply operation.
When the conditions that the total remaining electric quantity of the first battery pack 4 and the second battery pack 5 is greater than the electric quantity lower limit value K1, the remaining electric quantity of the second battery pack 5 is greater than the electric quantity lower limit value K2 and the electric quantity of the first battery pack 4 is greater than the electric quantity lower limit value K3 are met, a driver has multiple mode selections and can select a battery replacement mode as soon as possible, in the mode, the controller 1 only controls the first battery pack 4 to work, the second charging module 11 is started, the first battery pack 4 charges the second battery pack 5, at the moment, the electric quantity of the first battery pack 4 is rapidly reduced, and the replacement of the exhausted electric quantity of the first battery pack 4 is facilitated; the driver may also select a maximum driving range mode in which the controller 1 selects whether the first battery pack 4 or the second battery pack 5 operates according to the temperature; the driver can also select a performance priority mode, in which the controller 1 controls the first battery pack 4 and the second battery pack 5 to supply power together, and at the moment, the second charging module 11 does not work, so that the vehicle is ensured to be in the maximum electric quantity working state. After the driver selects the mode, the electric quantity detection module 2 keeps working periodically, and the controller 1 also judges and compares signals sent by the electric quantity adherence module and performs the selective power supply control of the battery pack.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms of the controller 1, the charge amount detection module 2, the discharge port 3, the first battery pack 4, the second battery pack 5, the electronic switch module 6, the temperature sensor 7, the alarm prompt module 8, the control input module 9, the first charging module 10, the second charging module 11, the charging port 12, the relay 13, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (8)
1. A replaceable battery control system of an electric automobile comprises a controller (1), an electronic switch module (6), a detachable first battery pack (4), a fixed second battery pack (5), a first charging module (10), a charging port (12) and a discharging port (3), wherein the discharging port (3) is powered by the first battery pack (4) and/or the second battery pack (5) through the electronic switch module (6), the replaceable battery control system of the electric automobile is characterized by further comprising a second charging module (11), the second charging module (11) is powered by the first battery pack (4) and is used for charging the second battery pack (5), the controller (1) is used for controlling the second charging module (11) and the electronic switch module (6), and the replaceable battery control system of the electric automobile further comprises an electric quantity detection module (2), the electric quantity detection module (2) is used for detecting the residual electric quantity of the first battery pack (4) and the second battery pack (5) and sending detection information to the controller (1), the controller (1) compares the residual total electric quantity of the first battery pack (4) and the second battery pack (5), the residual electric quantity of the second battery pack (5) and the residual electric quantity of the first battery pack (4) in sequence according to the detection information with corresponding preset electric quantity lower limit values, the controller (1) switches the power supply source of the discharge port (3) through the electronic switch module (6) according to the comparison result, and when the residual total electric quantity is met, and the respective residual electric quantities of the first battery pack (4) and the second battery pack (5) are sufficient, the controller (1) preferentially selects the discharge port (3) to be independently powered by the first battery pack (4) to work.
2. The removable battery control system of the electric automobile according to claim 1, further comprising a control input module (9), wherein the control input module (9) is connected to an input end of the controller (1), an output end of the controller (1) is connected to a relay (13), a normally open switch of the relay (13) is respectively connected to the second charging module (11) and the second battery pack (5), and the controller (1) controls the on/off of the relay (13) according to a signal input by the control input module (9).
3. The removable battery control system of an electric vehicle according to claim 1, wherein there are two electronic switch modules (6), the electronic switch modules (6) are connected to the output of the controller (1), the output of the first battery pack (4) is connected to the discharge port (3) through one of the electronic switch modules (6), and the output of the second battery pack (5) is connected to the discharge port (3) through the other electronic switch module (6).
4. The replaceable battery control system of the electric vehicle according to claim 1, wherein the controller (1) is preset with a lower limit value K1 of the electric quantity, when the controller (1) determines that the remaining total electric quantity of the first battery pack (4) and the second battery pack (5) in the current detection information is smaller than the lower limit value K1 of the electric quantity, the controller (1) selects one of the first battery pack (4) and the second battery pack (5) to be communicated with the discharge port (3), the other battery pack is disconnected from the discharge port (3), and the controller (1) does not compare the detection information in the next step;
an electric quantity lower limit value K2 is preset in the controller (1), when the controller (1) judges that the remaining total electric quantity of the first battery pack (4) and the second battery pack (5) in the current detection information is greater than the electric quantity lower limit value K1 and the remaining electric quantity of the second battery pack (5) is less than the electric quantity lower limit value K2, the controller (1) controls the first battery pack (4) to be communicated with the discharge port (3), the second battery pack (5) is disconnected with the discharge port (3), and the controller (1) does not compare the detection information in the next step;
the controller (1) is preset with an electric quantity lower limit value K3, the input end of the controller (1) is connected with a control input module (9), when the controller (1) judges that the remaining total electric quantity of the first battery pack (4) and the second battery pack (5) in the current detection information is greater than the electric quantity lower limit value K1 and the remaining electric quantity of the second battery pack (5) is greater than the electric quantity lower limit value K2, the controller (1) compares the first battery remaining electric quantity with the electric quantity lower limit value K3, and when the first battery pack (4) is less than the electric quantity lower limit value K3, the controller (1) only controls the second battery pack (5) to be communicated with the discharge port (3); when the power supply of the first battery is larger than the electric quantity lower limit value K3, the controller (1) controls the alarm prompting module (8) to give out an electric quantity sufficiency prompt, and the controller (1) receives a control signal sent by the control input module (9) to control the on-off of the first battery pack (4) and the discharge port (3) and the on-off of the second battery pack (5) and the discharge port (3).
5. The replaceable battery control system of the electric automobile according to claim 4, wherein the first battery pack (4) and the second battery pack (5) are respectively provided with a temperature sensor (7), the temperature sensors (7) are connected with an input end of the controller (1), the controller (1) receives a signal sent by the temperature sensors (7), and the controller (1) controls the electronic switch module (6) according to the received detected temperature.
6. The replaceable battery control system of the electric automobile according to claim 4 or 5, characterized in that the controller (1) is connected with an alarm prompt module (8), and the controller (1) controls the alarm prompt module (8) to give an alarm when the controller (1) judges that the remaining total electric quantity of the first battery pack (4) and the second battery pack (5) in the current detection information is less than the electric quantity lower limit value K1.
7. The removable battery control system of claim 6, wherein the controller (1) controls the alarm prompting module (8) to prompt whether to start the second charging module (11) when the controller (1) determines that the total remaining power of the first battery pack (4) and the second battery pack (5) in the current detection information is greater than the power lower limit value K1 and the remaining power of the second battery pack (5) is less than the power lower limit value K2.
8. The system for controlling the rechargeable battery of the electric vehicle according to claim 3, wherein the first battery pack (4) adopts a lithium iron phosphate cell, and the second battery pack (5) adopts a ternary cell.
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| CN113022367A (en) * | 2021-02-04 | 2021-06-25 | 中植一客成都汽车有限公司 | Auxiliary battery standard device and quick-change system of pure electric vehicle |
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