CN220682193U - Power battery system and new energy forklift - Google Patents
Power battery system and new energy forklift Download PDFInfo
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- CN220682193U CN220682193U CN202322337647.0U CN202322337647U CN220682193U CN 220682193 U CN220682193 U CN 220682193U CN 202322337647 U CN202322337647 U CN 202322337647U CN 220682193 U CN220682193 U CN 220682193U
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- 238000007599 discharging Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
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- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a power battery system and a new energy forklift, which relate to the technical field of new energy forklifts and specifically comprise the following steps: the main control module is used for sampling the voltage of the power battery in the whole vehicle so as to judge whether the power battery is in a safe discharge range according to a sampling result obtained by sampling, and when the power battery is not in the safe discharge range, the control instruction for controlling the execution module is output to dynamically control the power battery to stop discharging so as to avoid the damage phenomenon of the whole vehicle caused by overdischarge, and meanwhile, the output loop of the execution module is controlled by the control instruction to reduce the voltage of the output, so that the risk that the whole vehicle is damaged and further lifted due to high voltage is avoided, and the operation safety of the new energy forklift is ensured.
Description
Technical Field
The utility model relates to the technical field of new energy forklifts, in particular to a power battery system and a new energy forklift.
Background
At present, a high-voltage platform with more than 80V is mostly adopted as a starting voltage source of the whole vehicle, and high voltage is directly output to the whole vehicle to provide power for the whole vehicle.
However, in the process of providing power for the whole vehicle, the phenomenon that the whole vehicle is damaged due to over-discharge of the starting voltage source is easy to occur, and the risk of damage of the whole vehicle can be further improved due to high voltage of the starting voltage source adopting the high-voltage platform, so that the safety operation of the new energy forklift is not facilitated.
Disclosure of Invention
The utility model mainly aims to provide a power battery system and a new energy forklift, and aims to solve the technical problem of damage of the whole forklift caused by conventional starting voltage sources.
In order to achieve the above object, the present utility model provides a power battery system including: the system comprises a main control module and an execution module connected with the main control module;
the main control module is used for sampling the voltage of the power battery and outputting a control instruction according to a sampling result obtained by sampling;
the execution module comprises an execution device which is used for entering a closed state or an open state according to the control instruction so as to control the output state and the voltage reduction state of the voltage output by the power battery.
Optionally, the executing device includes a reset trigger, the reset trigger is connected with the output control end of the main control module through a hard wire, and the first end of the reset trigger is connected with the positive electrode of the power battery.
Optionally, the executing device comprises a discharge switch, a first end of the discharge switch is connected with a second end of the reset trigger, and the second end of the discharge switch is respectively connected with the control unit and the buck-direct-current converter.
Optionally, the executing device includes a first contactor, the first contactor is connected in parallel with the reset trigger, and the first contactor is connected with the output control end of the main control module through a serial communication protocol.
Optionally, the executing device includes a second contactor, a first end of the second contactor is connected with a positive electrode of the power battery, and the second contactor is connected with an output control end of the main control module through the serial communication protocol.
Optionally, the main control module includes a battery management system, an output control end of the battery management system is connected with the reset trigger through a hard wire, and the output control end of the battery management system is also connected with the first contactor and the second contactor through a serial communication protocol.
Optionally, the execution module further comprises a protection device, the protection device comprising a fuse, the fuse being connected between the power battery and the reset trigger.
In addition, in order to achieve the above purpose, the utility model also provides a new energy forklift, which comprises a fuel-electricity system and the power battery system, wherein the fuel-electricity system is connected with the power battery system;
the fuel electric system is used for converting electric energy when receiving the power supply voltage output by the power battery system;
the power battery system includes: the system comprises a main control module and an execution module connected with the main control module;
the main control module is used for sampling the voltage of the power battery and outputting a control instruction according to a sampling result obtained by sampling;
the execution module comprises an execution device which is used for entering a closed state or an open state according to the control instruction so as to control the output state and the voltage reduction state of the voltage output by the power battery.
Optionally, the fuel-electricity system comprises a fuel-electricity controller, a fuel-electricity system controller and a pile which are respectively connected with the power battery system, wherein the fuel-electricity controller and the fuel-electricity system controller establish two-way communication, and the voltage input end of the fuel-electricity system controller is connected with the voltage output end of the pile.
Optionally, the new energy forklift further comprises a control unit, and the control unit establishes bidirectional communication with the fuel-fired controller.
According to the technical scheme, the main control module is used for sampling the voltage of the power battery in the whole vehicle, so that whether the power battery is in a safe discharge range is judged according to a sampling result obtained by sampling, when the power battery is not in the safe discharge range is judged, the power battery is dynamically controlled to stop discharging by outputting a control instruction for controlling the execution module, so that the phenomenon that the whole vehicle is damaged due to overdischarge is avoided, meanwhile, the output circuit of the execution module is controlled by the control instruction to reduce the voltage, the risk that the whole vehicle is damaged and further lifted due to high voltage is avoided, and the operation safety of the new energy forklift is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a power battery system according to the present utility model;
FIG. 2 is a schematic circuit diagram of a power cell system according to the present utility model;
fig. 3 is a schematic diagram of a control structure of the new energy forklift of the present utility model.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Main control module | PCU | Fuel electric system controller |
| 20 | Execution module | pile | Electric pile |
| reset | Reset trigger | bat | Power battery |
| S1 | Discharging switch | 30 | Whole vehicle electric appliance |
| S2- | First contactor | key | Key switch |
| S3 | Second contactor | 40 | Driving motor controller |
| BMS | Battery management system | 50 | Low voltage load |
| R | Fuse protector | 60 | Auxiliary high voltage output |
| MCU | Control unit | DCL | Voltage distribution power supply |
| DC-DC | Step-down DC converter | PDU | Reactor with a reactor body |
| FCU | Fuel electric controller |
The achievement, functional features and aspects of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Referring to fig. 1, fig. 1 is a schematic block diagram of a power battery system according to the present utility model, where the power battery system includes: the device comprises a main control module 10 and an execution module 20 connected with the main control module 10;
the main control module 10 is used for sampling the bat voltage of the power battery and outputting a control instruction according to a sampling result obtained by sampling; the execution module 20 includes an execution device for entering a closed state or an open state according to the control command, thereby controlling an output state and a step-down state of the voltage output by the power battery bat.
Considering the problem of unsafe operation of the forklift caused by the power battery bat in the conventional new energy forklift mainly because of the overdischarge of the power battery bat and the condition that the power battery bat is at high voltage, the embodiment proposes to sample the voltage of the power battery bat through the main control module 10 so as to detect the charge state (namely, the adoption result) of the power battery bat, when detecting that the charge state reaches the battery overdischarge trigger threshold, output a corresponding control instruction for controlling the power battery bat to stop discharging to the execution module 20, dynamically control the closed state or the open state between the execution devices in the execution module 20, and control the power battery bat to output the voltage to the voltage output circuit in the whole electric appliance 30, thereby realizing timely control of the power battery bat to stop discharging before the power battery bat enters the overdischarge state and avoiding the overdischarge phenomenon.
Meanwhile, when the power battery bat is in a normal discharging state, the main control module 10 outputs a corresponding control instruction for controlling the normal discharging of the power battery bat to the execution module 20, the closed state or the open state among execution devices in the execution module 20 is dynamically controlled, the voltage reduction output loop of the power battery bat for outputting voltage to the whole vehicle electric appliance 30 is controlled, the voltage reduction of the voltage output to the whole vehicle electric appliance 30 by the power battery bat is realized, and the situation that the damage risk of the whole vehicle caused by the high voltage of the power battery bat is improved is avoided.
Specifically, referring to fig. 2, the executing device includes a reset trigger reset, where the reset trigger reset is connected to the output control end of the main control module 10 through a hard wire (i.e., a connection dotted line between the reset trigger reset and the battery management system BMS in fig. 2), and a first end of the reset trigger reset is connected to the positive electrode of the power battery bat.
At the beginning stage, the main control module 10 resets the voltage output loop and the voltage reduction output loop of the output voltage of the power battery bat through hard wire control reset trigger reset, the main control module 10 starts a detection mode of the power battery bat, and when the current state of charge of the power battery bat is detected by the main control module 10 to normally supply power to the whole electric appliance 30, the main control module 10 closes the voltage output loop of the execution module 20 through control, so that the power battery bat can normally supply power to equipment, and the whole electric appliance enters an operating state.
If the current state of charge of the power battery bat is detected by the main control module 10 and the power supply of the electric appliance 30 of the whole vehicle cannot be normally performed, the abnormal state of the current power battery bat is indicated, the main control module 10 automatically generates a battery abnormal protocol to report the battery fault, and meanwhile, the voltage output loop of the execution module 20 is controlled to be disconnected, so that the situation that the running risk of the whole vehicle is high due to the fact that the whole vehicle is still controlled to enter the running state under the abnormal condition of the power battery bat is avoided.
Further, the executing device comprises a discharging switch S1, a first end of the discharging switch S1 is connected with a second end of the reset trigger reset, and a second end of the discharging switch S1 is respectively connected with the control unit MCU and the step-down direct current converter DC-DC.
When the current state of charge of the power battery bat is detected by the main control module 10 to normally supply power to the whole electric appliance 30, the main control module 10 controls the discharge switch S1 to be closed so as to control the voltage output loop and the step-down output loop to be closed, and the voltage output by the power battery bat is output to the step-down direct current converter DC-DC to be step down through the step-down output loop while the whole electric appliance is supplied with power by the voltage output loop S1, so that the overdischarge risk existing when the state of charge of the power battery bat is in an unhealthy state and the whole electric appliance 30 is supplied with power is avoided, the step-down is carried out on the output voltage, the aging speed of the whole electric appliance 30 caused by high voltage is avoided, the running risk of the whole electric appliance is reduced, and the safe running of the new energy forklift is ensured.
The buck DC converter DC-DC in this embodiment is exemplified by 80V-24V.
Further, the executing device includes a first contactor S2, where the first contactor S2 is connected in parallel with the reset trigger reset, and the first contactor S2 is connected to the output control end of the main control module 10 through a serial communication protocol (i.e., a connection dotted line between the first contactor S2 and the battery management system BMS in fig. 2).
When the main control module 10 detects that the current state of charge of the power battery bat is normal to supply power to the whole electric appliance 30, the main control module 10 outputs a control instruction for controlling the first contactor S2 to be closed at this time, after the voltage output loop and the step-down output loop for keeping the output voltage of the power battery bat through the closed first contactor S2, the main control module 10 outputs a control instruction for controlling the reset trigger reset to be opened, because the function of the reset trigger reset is to be closed at the beginning stage, the voltage output loop and the step-down output loop are initialized and the main control module 10 is to detect the beginning stage of the power battery bat, so after the power battery bat can normally supply power to the whole electric appliance 30, in order to ensure the initialization function of the reset trigger reset to the voltage output loop and the step-down output loop, after the normal output of the keeping voltage is controlled by controlling the first contactor S2 to be closed at this time, the main control module 10 controls the reset trigger reset to be opened through a hard wire.
Further, the executing device includes a second contactor S2, a first end of the second contactor S2 is connected to the positive electrode of the power battery bat, and the second contactor S2 is connected to the output control end of the main control module 10 through the serial communication protocol (i.e., a connection dotted line between the second contactor S3 and the battery management system BMS in fig. 2).
When the main control module 10 detects that the power battery bat needs to be charged at this time, the main control module 10 outputs a control instruction for controlling the second contactor S2 to be closed, and the control instruction outputs the control instruction to the second contactor S2 by establishing a serial communication protocol in which the main control module 10 is connected with the second contactor S2, so that the second contactor S2 is closed to form a charging loop. Meanwhile, when the main control module 10 detects that the power battery bat is charged, in order to avoid the overcharge phenomenon of the power battery bat, the main control module 10 outputs a control instruction for controlling the disconnection of the second contactor S2, and the control instruction is output to the second contactor S2 through a serial communication protocol, so that the disconnection of the second contactor S2 is controlled, a charging loop is disconnected, the charging safety of the power battery bat is ensured, and the damage condition of the whole vehicle is further reduced.
Further, the main control module 10 includes a battery management system BMS, an output control end of the battery management system BMS is connected with the reset trigger reset through a hard wire, and the output control end of the battery management system BMS is further connected with the first contactor S2 and the second contactor S2 through a serial communication protocol.
It should be noted that, the main control module 10 in this embodiment includes a battery management system BMS that performs detection on the power battery bat and performs dynamic switching control on each execution device in the execution module 20, and the battery management system BMS can detect the state of charge of the power battery bat in real time, so as to implement real-time detection on the state of charge and the state of discharge of the power battery bat, and implement automatic dynamic adjustment of the loop according to the detected result, so as to avoid inconvenience and delay caused by manual adjustment.
Further, the execution module 20 further includes a protection device including a fuse R connected between the power battery bat and the reset trigger reset.
The fuse R is connected to the positive electrode of the power battery bat, so that after the voltage and current output by the power battery bat exceeds a specified value for a period of time, the fuse melts with heat generated by the fuse, and the voltage output loop and the voltage reduction output loop are disconnected, so that the protective device with protective effect on other equipment devices is realized.
Referring to fig. 3, the utility model further provides a new energy forklift, which comprises a fuel system and the power battery system, wherein the fuel system is connected with the power battery system;
the fuel electric system is used for converting electric energy when receiving the power supply voltage output by the power battery system.
The power battery system includes: the device comprises a main control module 10 and an execution module 20 connected with the main control module 10;
the main control module 10 is used for sampling the bat voltage of the power battery and outputting a control instruction according to a sampling result obtained by sampling;
the execution module 20 includes an execution device for entering a closed state or an open state according to the control command, thereby controlling an output state and a step-down state of the voltage output by the power battery bat.
Further, the fuel system comprises a fuel controller FCU, a fuel system controller PCU and a pile pipe, wherein the fuel controller FCU, the fuel controller PCU and the pile pipe are respectively connected with the power battery system, the fuel controller FCU and the fuel system controller PCU establish two-way communication (CAN communication), and a voltage input end of the fuel system controller PCU is connected with a voltage output end of the pile pipe.
Further, the new energy forklift further comprises a control unit MCU, and the control unit MCU establishes two-way communication (CAN communication) with the fuel control unit FCU.
The new energy forklift and the hydrogen fuel energy forklift in this embodiment are exemplified.
As can be seen from fig. 3, the fuel control unit FCU is connected with the control unit MCU and the fuel system controller PCU, and is responsible for processing control signals and system operation status signals input by a user, such as power requirements, system status, input of a vehicle signal, fault diagnosis, power battery bat temperature and current voltage, etc., and performs control decision and calculation through the connected signals, and the fuel control unit FCU outputs the output control instructions to each component, so as to realize overall monitoring and operation coordination between each component.
The fuel system controller PCU is respectively connected with the fuel controller FCU and the pile pipe, and is mainly used for automatically adjusting and distributing the output of the power supply current accessed from the pile pipe according to the control instruction input by the fuel controller FCU, so that the stability and the safety of the output power supply current are ensured.
The pile pipe in the present embodiment is used to directly convert chemical energy of hydrogen and oxygen into electric energy, and then output the boosted power supply current to the fuel system controller PCU through the boost DC.
In addition, the electric power system comprises a complete vehicle electric appliance 30 which receives a control command of a control unit MCU and 24V+ voltage after voltage reduction through CAN communication so as to ensure the basic function of the complete vehicle, a key switch key which is used for carrying out complete vehicle power on and receives the voltage high voltage 80V+ output by a power battery bat, a driving motor controller 40 (high voltage load) which is used for driving the complete vehicle motor and receives the voltage high voltage output by a power battery bat and the voltage high voltage output by a fuel system controller PCU, a low voltage load 50 which is connected with a voltage distribution power DCL of the fuel system controller PCU and is used for providing a stable low voltage power supply, and an auxiliary high voltage output 60 which is connected with a reactor PDU of the fuel system controller PCU and is used for providing a stable high voltage power supply.
The control method of the power battery system is as follows:
(1) the reset trigger reset is pressed down to initialize the output loop of the power battery bat, the discharge switch S1 is disconnected, the battery management system BMS samples the voltage of the power battery bat, the state of charge of the power battery bat is judged according to the sampling result, when the state of charge of the power battery bat is judged to be a threshold value capable of discharging normally, the discharge switch S1 and the first contactor S2 are sucked, the reset trigger reset is disconnected, the discharging stage is entered, and the voltage-reducing output loop of the voltage output loop of the power battery bat is completed to supply power to required devices and equipment.
(2) In the discharging stage, the battery management system BMS judges the charge state of the power battery bat in real time, for example, a certain discharging threshold is set to judge the discharging stage of the power battery bat, and when the charge state of the current power battery bat is less than or equal to 20% is judged, the battery management system BMS sends a primary alarm signal to the control unit MCU, and the control unit MCU outputs a signal representing that the whole vehicle needs to be charged through a vehicle instrument; when judging that the state of charge of the current power battery bat is smaller than or equal to 10%, the battery management system BMS sends a secondary alarm signal to the control unit MCU, the fuel cell system controller PCU can forcedly start the electric pile pipe to feed back the power battery bat for supplementing electricity, if the fuel cell system controller PCU fails at the moment and causes the power battery bat to be unable to start, a signal representing the fault of the fuel cell system controller PCU can be sent to the control unit MCU, meanwhile, the battery management system BMS can automatically control the first contactor S2 to be disconnected, the power battery bat is forcedly controlled to stop discharging, and the over-discharge phenomenon caused by the fact that the power battery bat is still discharged when the state of charge of the current power battery bat is smaller than or equal to 10% is avoided. After the power battery bat is controlled to enter a parking state, performing fault investigation and repair on the fuel system controller PCU, and if the fault repair is completed, sucking the first contactor S2 and the second contactor S2, and forcedly starting the pile to feed back the power battery bat for supplementing electricity.
(3) In the charging stage, when the battery management system BMS determines that the current state of charge of the power battery bat is equal to a certain charging threshold, the second contactor S2 is opened, so as to avoid the overcharge phenomenon of the power battery bat.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present utility model may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present utility model.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A power battery system, the power battery system comprising: the system comprises a main control module and an execution module connected with the main control module;
the main control module is used for sampling the voltage of the power battery and outputting a control instruction according to a sampling result obtained by sampling;
the execution module comprises an execution device which is used for entering a closed state or an open state according to the control instruction so as to control the output state and the voltage reduction state of the voltage output by the power battery.
2. The power cell system of claim 1, wherein the actuator comprises a reset trigger, the reset trigger is connected to the output control end of the main control module by a hard wire, and a first end of the reset trigger is connected to the positive electrode of the power cell.
3. The power cell system of claim 2, wherein the actuator comprises a discharge switch, a first end of the discharge switch being coupled to a second end of the reset trigger, the second end of the discharge switch being coupled to the control unit and the buck-dc converter, respectively.
4. The power cell system of claim 3, wherein the actuator comprises a first contactor, the first contactor is connected in parallel with the reset trigger, and the first contactor is connected with an output control end of the main control module through a serial communication protocol.
5. The power battery system of claim 4, wherein the actuator comprises a second contactor, a first end of the second contactor is connected with a positive pole of the power battery, and the second contactor is connected with an output control end of the main control module through the serial communication protocol.
6. The power battery system of claim 5, wherein the master control module comprises a battery management system, an output control end of the battery management system is connected with the reset trigger through a hard wire, and the output control end of the battery management system is also connected with the first contactor and the second contactor respectively through a serial communication protocol.
7. The power cell system of claim 6, wherein the execution module further comprises a protection device comprising a fuse coupled between the power cell and the reset trigger.
8. A new energy forklift, characterized in that the new energy forklift comprises a fuel-electricity system and the power battery system according to any one of claims 1 to 7, wherein the fuel-electricity system is connected with the power battery system;
the fuel electric system is used for converting electric energy when receiving the power supply voltage output by the power battery system.
9. The new energy forklift of claim 8, wherein said fuel cell system comprises a fuel cell controller, a fuel cell system controller and a stack respectively connected to said power cell system, said fuel cell controller establishing bi-directional communication with said fuel cell system controller, a voltage input of said fuel cell system controller being connected to a voltage output of said stack.
10. The new energy forklift of claim 9, further comprising a control unit that establishes two-way communication with said fuel cell controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322337647.0U CN220682193U (en) | 2023-08-29 | 2023-08-29 | Power battery system and new energy forklift |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322337647.0U CN220682193U (en) | 2023-08-29 | 2023-08-29 | Power battery system and new energy forklift |
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| CN220682193U true CN220682193U (en) | 2024-03-29 |
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| CN202322337647.0U Active CN220682193U (en) | 2023-08-29 | 2023-08-29 | Power battery system and new energy forklift |
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- 2023-08-29 CN CN202322337647.0U patent/CN220682193U/en active Active
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