CN111541292A - Battery pack system - Google Patents
Battery pack system Download PDFInfo
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- CN111541292A CN111541292A CN202010466601.7A CN202010466601A CN111541292A CN 111541292 A CN111541292 A CN 111541292A CN 202010466601 A CN202010466601 A CN 202010466601A CN 111541292 A CN111541292 A CN 111541292A
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- control unit
- battery pack
- battery
- bcu
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- 238000001514 detection method Methods 0.000 claims abstract description 31
- 239000000178 monomer Substances 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims description 13
- 230000017525 heat dissipation Effects 0.000 description 17
- 238000005192 partition Methods 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 238000003745 diagnosis Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery pack system which comprises a main control unit BCU, a shunt, a relay assembly and a plurality of battery packs, wherein the main control unit BCU is connected with the shunt; the main control unit BCU is respectively connected with each battery pack, the current detection end of the main control unit BCU is connected with the shunt, and the total voltage detection end of the main control unit BCU is connected with the relay assembly; in one battery pack, the battery pack includes a slave control unit BMU and a plurality of monomer battery cells, an output end of the slave control unit BMU is connected with the master control unit BCU, an acquisition end of the slave control unit BMU is connected with each of the monomer battery cells, and the monomer battery cells are sequentially connected in series. The invention relates to a battery pack system, which is characterized in that a main control unit BCU, a shunt, a relay assembly and a plurality of battery packs are arranged, so that the battery pack system has smaller volume, can output high voltage and high power instantly, provides more stable power supply capability and prolongs the service life of a battery.
Description
Technical Field
The invention relates to the field of energy storage battery packs, in particular to a battery pack system.
Background
Nowadays, lithium batteries are regarded as accepted ideal energy storage elements and get higher attention as new energy industries such as electric vehicles, energy storage batteries and the like which are intensively developed in the world. China also invests huge capital and policy support in the field of power batteries, and backbone enterprises which attract attention in the global battery industries such as BYD, BKEN, Lishen, Zhongboat lithium batteries and the like are emerged. The positive electrode material, the negative electrode material, the battery diaphragm and the electrolyte are the most important four raw materials of the lithium battery, the lithium battery diaphragm cannot realize domestic large-scale production all the time due to large investment risk and high technical threshold, and becomes a bottleneck restricting the development of the lithium battery industry in China, particularly in the field of power lithium ion batteries with higher requirements on safety and consistency, and is a difficult obstacle from the large lithium battery producing country to the strong lithium battery producing country in China.
However, with the development of the current electronic technology, the demand of small volume, small weight and high power energy is higher and higher, especially the demand of instantaneous high power. The existing battery pack systems cannot provide high-voltage and high-power energy, so that the requirements of users cannot be met in the using process, and some high-power battery packs are large in size and inconvenient to carry and transport; and the current battery pack system is easy to have unstable power supply, which causes the battery pack system not to be used normally.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the battery pack system which is small in size, can instantly output high voltage and high power and is stable in power supply capacity.
The purpose of the invention is realized by the following technical scheme:
a battery pack system comprising: the system comprises a main control unit BCU, a shunt, a relay assembly and a plurality of battery packs;
the main control unit BCU is respectively connected with each battery pack, the current detection end of the main control unit BCU is connected with the shunt, and the total voltage detection end of the main control unit BCU is connected with the relay assembly;
the relay assembly comprises a pre-charging relay, a main positive relay and a charging relay, and the pre-charging relay, the main positive relay and the charging relay are respectively connected with a main voltage detection end of the main control unit BCU;
in one battery pack, the battery pack includes a slave control unit BMU and a plurality of monomer battery cells, an output end of the slave control unit BMU is connected with the master control unit BCU, an acquisition end of the slave control unit BMU is connected with each of the monomer battery cells, and the monomer battery cells are sequentially connected in series.
In one embodiment, a positive current detection line and a negative current detection line are arranged on the main control unit BCU, a positive connecting end and a negative connecting end are arranged on the shunt, the positive current detection line is connected with the positive connecting end of the shunt, the negative current detection line is connected with the negative connecting end of the shunt, and the negative connecting end of the shunt is used for being connected with the total negative end of the battery pack.
In one embodiment, the relay assembly further comprises a master negative relay connected to the shunt.
In one embodiment, in one battery pack, the battery pack further includes a plurality of acquisition lines, and each of the acquisition lines is connected to each of the unit cells in a one-to-one correspondence manner.
In one embodiment, the master control unit BCU is connected to each of the slave control units BMU through a CAN bus.
In one embodiment, the battery pack system further comprises a vehicle control unit, and the vehicle control unit is connected with the main control unit BCU.
In one embodiment, the battery pack system further comprises a charger, and the charger is connected with the main control unit BCU.
In one embodiment, the battery pack system further comprises a diagnosis upper computer, and the diagnosis upper computer is connected with the main control unit BCU.
In one embodiment, the battery pack system further includes a battery box, the battery box is provided with an installation cavity, and the main control unit BCU, the shunt, the relay assembly and the plurality of battery packs are respectively accommodated in the installation cavity.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention relates to a battery pack system, which is characterized in that a main control unit BCU, a shunt, a relay assembly and a plurality of battery packs are arranged, so that the battery pack system has smaller volume, can output high voltage and high power instantly, provides more stable power supply capability and prolongs the service life of a battery.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a battery pack system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a battery pack system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a main control unit BCU of the battery pack system according to the embodiment shown in fig. 1;
FIG. 4 is a schematic structural diagram of a battery case according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a battery housing shown in FIG. 4 from a first perspective;
FIG. 6 is a schematic diagram of a battery case shown in FIG. 4 from a second perspective;
FIG. 7 is a schematic diagram of a battery case shown in FIG. 4 from a third perspective;
fig. 8 is a schematic structural view of a unit cell according to an embodiment of the present invention;
fig. 9 is a structural schematic view of a bottom plate of the battery case body shown in fig. 4;
fig. 10 is a schematic view of the separator of the battery case shown in fig. 4.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a battery pack system includes: the main control unit BCU100, the shunt 200, the relay assembly 300 and the plurality of battery packs 400; it should be noted that the main control unit BCU100 is configured to collect voltage, current, and other battery data of each battery pack; the shunt 200 is used for measuring the current of the battery pack; the relay assembly 300 is used for controlling the charging and power supply of the battery pack to be switched on and off; the battery pack 400 is used as an energy storage power supply to supply power or is charged by an external charger.
Referring to fig. 1, the main control unit BCU is respectively connected to each of the battery packs, a current detection end of the main control unit BCU is connected to the shunt, and a total voltage detection end of the main control unit BCU is connected to the relay assembly.
The relay assembly 300 includes a pre-charge relay 310, a main positive relay 320 and a charge relay 330, which are respectively connected to a main voltage detection terminal of the main control unit BCU. It should be noted that the pre-charge relay 310 is used for controlling the pre-charge state of the battery pack, so as to pre-charge the battery pack; the main positive relay 320 is used for controlling the output of the battery pack, so that power supply to an external device or external equipment can be realized; the charging relay 330 is used for charging the battery pack to realize the energy storage function of the battery pack.
Further, main control unit BCU100 through total voltage detection line respectively with pre-charge relay 310, total positive relay 320 and charging relay 330 are connected, through setting up total voltage detection line, then can real-time detection battery pack's total voltage, can realize outwards exporting high voltage in the power supply, when charging, then can avoid voltage too big, damage the monomer electricity core in the battery pack, and then can avoid monomer electricity core to appear overcharging the problem of putting, also can avoid monomer electricity core because of voltage is too big, and arouse the danger of generating heat, protect monomer electricity core, improve battery pack's security and reliability.
In one battery pack, the battery pack 400 includes a slave control unit BMU410 and a plurality of battery cells 420, an output end of the slave control unit BMU is connected to the master control unit BCU, an acquisition end of the slave control unit BMU is connected to each of the battery cells, and the battery cells are sequentially connected in series. It should be noted that the slave control unit BMU410 is configured to collect voltage, current, and temperature data of each individual battery cell, and send the data to the master control unit BCU; each of the individual cells 420 is configured to store energy and output a large voltage and a large power.
Therefore, by arranging the main control unit BCU, the voltage of each battery pack can be acquired in real time, the relay assembly outputs the voltage outwards or charges the battery pack, and after the single battery cells in the battery pack are connected in series, the voltage and the current can be maximally superposed, so that the output of high voltage and high power can be realized; and through setting up the shunt, can realize gathering the electric current that lets in the battery package, and then realize the detection to the electric current, when the electric current is too big or other unusual appearing, then can in time carry out safeguard measure, prolong the life of battery. In addition, the battery pack system can provide more stable power supply capability compared with the conventional battery pack by arranging a plurality of battery packs and connecting the battery packs in series.
Referring to fig. 1, a positive current detection line 110 and a negative current detection line 120 are arranged on the main control unit BCU, a positive connection end and a negative connection end are arranged on the shunt, the positive current detection line is connected with the positive connection end of the shunt, the negative current detection line is connected with the negative connection end of the shunt, and the negative connection end of the shunt is used for being connected with the total negative end of the battery pack. It should be noted that the positive current detection line 110 of the main control unit BCU is used for collecting the current of the positive connection end of the shunt; the negative current detection line 120 of the main control unit BCU is used for collecting the current of the negative connection end of the shunt, so that the current input into the battery pack can be monitored in real time, and the current flowing into the battery pack can be prevented from being too large.
Referring to fig. 1, the relay assembly further includes a master negative relay 340, which is connected to the shunt. It should be noted that the master negative relay 340 is used as a switch, that is, a switch for controlling the connection of the battery pack to the outside. So, through setting up total negative relay 340, can control the battery package total negative terminal with outside being connected, when needs supply power or when charging, then need close this total negative relay and total positive relay to just can realize the function of charging or supplying power.
Referring to fig. 1, in one battery pack, the battery pack 400 further includes a plurality of collecting lines 430, and each collecting line is connected to each single battery cell in a one-to-one correspondence manner. It should be noted that the acquisition line 430 is used to acquire information such as current, voltage, and temperature of the individual battery cells.
Referring to fig. 1, the master control unit BCU is connected to each slave control unit BMU through a CAN bus. It should be noted that, by setting the CAN bus, the connection between the master control unit and the slave control unit CAN be conveniently realized, and the validity and reliability of the acquisition CAN be improved by setting the CAN bus.
Referring to fig. 2, the battery pack system further includes a vehicle control unit 500, and the vehicle control unit is connected to the main control unit BCU. The vehicle controller is used for controlling the vehicle machine, and when the battery pack system is connected with the vehicle controller, the vehicle controller can form a vehicle-mounted system to control the electric vehicle; and the electric vehicle further comprises an instrument device, so that a complete vehicle-mounted system is formed, and the electric vehicle can be powered and provide corresponding driving force. Specifically, the vehicle control unit is connected with the main control unit BCU through the vehicle CAN, so that the battery data CAN be conveniently connected into the vehicle control unit.
Referring to fig. 2, the battery pack system further includes a charger 600, and the charger is connected to the main control unit BCU. It should be noted that the charger 600 is configured to charge the single battery cells of the battery pack system, and when the electric quantity of the single battery cells is insufficient, the main control unit BCU is connected to the charger, and then the charger is connected to the total negative relay and the total positive relay in the battery pack system, so as to charge the single battery cells in the battery pack, and ensure that the battery pack has sufficient electric quantity.
Referring to fig. 2, the battery pack system further includes a diagnosis upper computer 700 connected to the main control unit BCU. It should be noted that, after the diagnosis host computer 700 is used for the connection of the main control unit BCU, the diagnosis and detection of the battery pack system can be realized. In this embodiment, the diagnosis host computer 700 may be a computer.
It should be further noted that, referring to fig. 3, the main control unit BUC100 further includes a power management module 101, a sound alarm module 102, a light-emitting alarm module 103, an energy input module 104, an energy output module 105, a management system starting module 106, and a sampling module 107, which are controlled together to execute operations. Therefore, the power supply management module is arranged for managing the output power supply state in the battery pack; the sound alarm module is used for giving an alarm sound, and when the battery pack system is abnormal, the sound alarm module gives an alarm sound so that a user can check the condition of the battery pack system in time; the light-emitting alarm module is used for being matched with the sound alarm module to realize the function of alarming simultaneously; the energy input module and the energy output module are used for controlling the input and the output of the electric quantity of the battery pack; the management system starting module is used as a switch to control the starting and the closing of the battery pack system; the sampling module is used for collecting the battery pack data.
Specifically, be connected with the sampling module on the group battery, in this embodiment, the sampling module is equipped with a plurality of sampling input ends for gather every battery cell's voltage, and protect every battery cell. The lithium ion battery pack is further provided with a current safety module, the lithium ion battery pack supplies power to the execution switch module through the current safety module, and when the current exceeds the rated current of the circuit board, the lithium ion battery pack can be automatically protected. It should be noted that the current fuse module is a shunt.
In this embodiment, the main control unit BCU further includes a processing module, and the processing module is connected with an electric quantity display module 108 for helping to display the battery capacity. In the embodiment, a temperature detection module 109 is further arranged for detecting the temperature of the battery pack, if the temperature of the battery pack is too high, the service life of the battery is affected, and when the temperature of the battery pack is too high, the main loop is cut off through the temperature detection module.
In this embodiment, the hybrid processing module is connected with the safety transportation switch module 401, so that the safety of battery transportation can be ensured, and when the battery is transported and stored, the safety transportation switch module can be switched on, so that the positive and negative poles of the battery have no voltage and current output, thereby ensuring no accidental short circuit, facilitating the installation on an automobile, and closing the safety transportation switch module during the use. In this embodiment, the processing module is further connected with a forced start delay module, and the forced delay start module is used for starting the battery and forcibly switching the battery to recover so as to start the engine after the MOS transistor cuts off the main circuit.
In the use, if the driver stops and stalls, forgets to turn off the light and use big electrical apparatus, start after the battery discharges a period, can the automatic start overdischarge protection circuit, do not have the current output, but leave certain electric quantity, as long as press the compulsory starting switch, can start the engine, avoid the car trailer that breaks down. The battery protection board is added in the automobile using the lithium ion starting battery, and the lithium ion battery in the electric automobile can be well protected by the invention, so that the service life of the battery is prolonged, and the use safety of the battery is improved.
Referring to fig. 4, the battery pack system further includes a battery box 10, an installation cavity is disposed on the battery box, and the main control unit BCU, the shunt, the relay assembly, and the plurality of battery packs are respectively accommodated in the installation cavity. So, through setting up the battery box, can protect the battery package system, improve the security of battery package system, the life of monomer battery in the extension battery package.
It can be understood that the existing battery box generally comprises a plurality of single batteries, generally, the structural size of the battery box with high voltage and high function is large, and the battery box is inconvenient to carry, and the existing battery box with small size cannot be integrated with a large number of batteries, so that the output of high voltage and high power cannot be realized; in addition, the existing battery box body has poor heat dissipation, so that the heat productivity of the internal single battery is easily overlarge, the battery pack cannot work normally, the short circuit is easily caused due to large heat productivity, and a fire disaster can be caused in serious cases.
Referring to fig. 4, a battery case 10 includes: the battery box comprises a box body assembly 1, a heat dissipation assembly 2, a hand-held assembly 3 and a reinforcing rib assembly 4, wherein the box body assembly 1 is used for placing a battery pack; the heat dissipation assembly 2 is used for achieving the effect of dissipating heat of the battery pack; the hand-held assembly 3 is used for lifting the box body, so that the box body is convenient to transfer and carry; the reinforcing rib assembly 4 is used for reinforcing the structural strength of the bottom of the box body.
Referring to fig. 5, the box assembly 1 includes a battery box body 11 and an upper cover 12, the upper cover covers the battery box body, the battery box body is provided with a mounting area, and the mounting area is used for placing a single battery. The battery box body 11 is used for accommodating a battery pack; the upper cover 12 is used for forming a closed space for the box body, and plays a role in protection.
Referring to fig. 4, the heat dissipation assembly 2 includes a first heat dissipation fan 21 and a second heat dissipation fan 22, a first fixing hole and a second fixing hole are formed on a side wall of the battery box body 11, the first heat dissipation fan and the second heat dissipation fan are respectively disposed on the battery box body, and the first heat dissipation fan is mounted in the first fixing hole. It should be noted that the first cooling fan 21 and the second cooling fan 22 are both used for achieving cooling, so that the battery pack is at a proper temperature, and the battery pack can work normally.
Referring to fig. 4, the carrying assembly 3 includes two handles, the two handles are respectively disposed at the outer side of the battery box body, and the two handles are respectively located at the opposite outer side walls of the battery box body. It should be noted that, by arranging the two handles, the battery box body can be conveniently lifted.
Referring to fig. 6, the reinforcing rib assembly 4 includes a plurality of fixing strips, and each fixing strip is disposed at a bottom position of the battery box body. It should be noted that, the fixing strips are respectively fixed on the bottom plate of the battery box body, so that the structural strength of the bottom of the box body can be enhanced, the box body can bear the weight of more batteries, the situation that the bottom plate falls off cannot occur, and the stability of the box body structure is improved.
So, through setting up box subassembly and radiator unit, when can realizing the output of small volume high voltage high power, can also in time dispel the heat, guarantee that battery cell works under suitable temperature, guarantee that the battery package can normal work, avoid appearing because of giving out heat the big condition that appears the short circuit, improve the reliability of battery box, and then improve the security that the battery package used. And still through setting up portable subassembly and strengthening rib subassembly, can conveniently carry out the transport of battery box and improve the structural stability of battery box.
Referring to fig. 5 and 7, the first heat dissipation fan 21 includes a first protective cover 21a, a first fan 21b and a first filter screen 21c, the first protective cover is disposed in the battery box body, the first protective cover is disposed outside the first fixing hole, the first fan is mounted in the first protective cover, and the first filter screen is mounted on the first fixing hole. The first protective cover 21a is used to protect the fan from external damage; the first fan 21b is used for dissipating heat, helping the battery pack dissipate heat, and protecting the battery pack so that the battery pack can work at a proper temperature; the first filter 21c is used to prevent dust or other foreign materials from entering the fan.
It should be further noted that the second heat dissipation fan includes a second protection cover, a second fan and a second filter screen, the second protection cover is disposed inside the battery box body, the second protection cover is disposed outside the second fixing hole, the second fan is installed inside the second protection cover, and the second filter screen is installed on the second fixing hole. The function of the second heat dissipation fan is the same as that of the first heat dissipation fan, and detailed description thereof is omitted.
Referring to fig. 5, in one of the handles, the handle includes an installation plate 31, a stress plate 32 and two side plates 33, the installation plate is disposed on an outer side wall of the battery box body, the stress plate is disposed on the installation plate, the two side plates are respectively disposed at two sides of the installation plate, and the installation plate, the stress plate and the two side plates together form a stress groove. It should be noted that the mounting plate 31 is used for being fixed on the box body; the stress plate 32 is used for realizing a lifting function; the side plate 33, the mounting plate 31 and the stress plate 32 form a stress groove together, so that the lifting operation is convenient.
Referring to fig. 6, in one of the fixing strips, the fixing strip includes a supporting plate 41 and two clamping pieces 42, the supporting plate is mounted on the bottom of the battery box body, the two clamping pieces are respectively disposed at two sides of the supporting plate, and the two clamping pieces are respectively disposed on the side walls of the battery box body. It should be noted that the supporting plate 41 is used for supporting; the clip 42 is used for further securing to the case.
Referring to fig. 7, the supporting plate is provided with a groove 43, an opening of the groove faces the bottom of the battery box body, and two sides of the supporting plate are respectively provided with an extending piece 44, and the extending pieces are attached to the bottom of the battery box body. It should be noted that the extension piece 44 serves to further enhance the fixing function, so that the reinforced fixing of the whole fixing strip is more stable.
Referring to fig. 4, the battery box further includes a display assembly 5 disposed on an outer sidewall of the battery box body. Specifically, the display module 5 includes a display screen 51 and a display fixing plate 52, the display fixing plate is disposed on the outer side wall of the battery box body, and the display screen is disposed on the display fixing plate. It should be noted that the display screen is used for displaying; the display fixing plate 52 is used for fixing the display screen.
Referring to fig. 5, the battery box body is further provided with a plurality of heat dissipation long holes 6, and a space is respectively arranged between the heat dissipation long holes. So, through setting up the heat dissipation slot hole, can further improve the radiating effect.
The invention also provides a battery pack system which comprises the battery box body. The battery pack system further comprises a plurality of battery packs, and a plurality of single batteries are included in each battery pack. Because the single batteries need to be fixed on the battery box body, each single battery is erected on the battery box body, the distance between the single batteries cannot be too large, if the distance is too large, the whole battery box body is too large, the space is wasted, and if the distance between the single batteries is too small, the mutual influence conditions, such as heat dissipation performance, are easy to occur; in addition, in order to ensure that the single batteries do not collide with each other in the transportation process of the battery pack, the single batteries must be firmly fixed in the battery box body. Based on this, in one embodiment, for example, referring to fig. 8 and 9, a bottom plate 13 is disposed on the battery box body, a plurality of fixing grooves 14 are formed on the bottom plate, a horizontal distance and a vertical distance between adjacent fixing grooves are both 1mm to 6mm, a plurality of folding edges 15 are further disposed on the bottom plate around each fixing groove, in one single battery, a double-sided adhesive layer 71 is disposed on the bottom of the single battery, and a protruding structure 72 is disposed on a sidewall of the single battery, when the single battery is placed in the fixing groove, the double-sided adhesive layer on the single battery is attached to the bottom of the groove, and the folding edges on the bottom plate are fastened to the protruding structure of the single battery, so that the single battery can be firmly mounted on the bottom plate of the battery box body, and thus, the single batteries can be arranged on the bottom plate in order, and can also guarantee that the mutual collision between the single batteries can not happen in the transportation process. In this embodiment, the horizontal distance of fixed slot is 2mm, and vertical distance is 3mm, or horizontal distance is 3mm, and vertical distance is 2mm, or horizontal distance and vertical distance are 3mm or 2 mm. Further, the hem is the hem structure of many radians, so, through setting up many radians hem structure, can improve the pressure of lock, further improve structural stability.
Further, the hem is provided with two, two the hem respectively the symmetry set up in the both sides limit of fixed slot, so, can realize the lock on the both sides position of the protruding structure of battery cell to can improve battery cell's stability in the fixed slot with the battery cell lock, further avoid bumping between the battery cell.
For another example, in order to further ensure that the single batteries do not collide during transportation, for example, referring to fig. 10, the battery box further includes a partition plate 81, the partition plate is provided with a plurality of battery embedding holes 82, each of the battery embedding holes is arranged on the partition plate in a rectangular array, and each of the battery embedding holes is used for fixing the single battery; the battery box body further comprises a plurality of jacking components, each jacking component is arranged on the partition plate, in one jacking component, each jacking component comprises a jacking column 83 and a sucker 84, each jacking column is arranged on the partition plate, and each sucker is arranged at one end, far away from the partition plate, of each jacking column. It should be noted that the partition board is used for placing the single batteries, and isolating each single battery, avoiding collision between adjacent single batteries, improving the safety of the battery, and the jacking column is used for jacking on the side wall of the battery box body, the sucker is installed on the side wall of the battery box body after being installed on the jacking column and adsorbed on the side wall of the battery box body, and the partition board can be stably and firmly installed in the installation area of the battery box body through the structure of the sucker and the jacking column, and meanwhile, mutual collision between the single batteries can be avoided, and the safety of the battery pack is improved.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention relates to a battery pack system, which is characterized in that a main control unit BCU, a shunt, a relay assembly and a plurality of battery packs are arranged, so that the battery pack system has smaller volume, can output high voltage and high power instantly, provides more stable power supply capability and prolongs the service life of a battery.
The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A battery pack system, comprising: the system comprises a main control unit BCU, a shunt, a relay assembly and a plurality of battery packs;
the main control unit BCU is respectively connected with each battery pack, the current detection end of the main control unit BCU is connected with the shunt, and the total voltage detection end of the main control unit BCU is connected with the relay assembly;
the relay assembly comprises a pre-charging relay, a main positive relay and a charging relay, and the pre-charging relay, the main positive relay and the charging relay are respectively connected with a main voltage detection end of the main control unit BCU;
in one battery pack, the battery pack includes a slave control unit BMU and a plurality of monomer battery cells, an output end of the slave control unit BMU is connected with the master control unit BCU, an acquisition end of the slave control unit BMU is connected with each of the monomer battery cells, and the monomer battery cells are sequentially connected in series.
2. The battery pack system according to claim 1, wherein the main control unit BCU is provided with a positive current detection line and a negative current detection line, the shunt is provided with a positive connection end and a negative connection end, the positive current detection line is connected with the positive connection end of the shunt, the negative current detection line is connected with the negative connection end of the shunt, and the negative connection end of the shunt is used for being connected with the total negative end of the battery pack.
3. The battery pack system of claim 1, wherein the relay assembly further comprises a master negative relay connected to the shunt.
4. The battery pack system of claim 1, wherein in one battery pack, the battery pack further comprises a plurality of collecting lines, and each collecting line is connected to each single battery cell in a one-to-one correspondence manner.
5. The battery pack system according to claim 1, wherein the master control unit BCU is connected to each of the slave control units BMU through a CAN bus.
6. The battery pack system of claim 1, further comprising a vehicle control unit, the vehicle control unit being connected to the master control unit (BCU).
7. The battery pack system of claim 1, further comprising a charger connected to the main control unit (BCU).
8. The battery pack system of claim 1, further comprising a diagnostic host computer connected to the master control unit (BCU).
9. The battery pack system of claim 1, further comprising a battery box, wherein the battery box is provided with an installation cavity, and the main control unit (BCU), the shunt, the relay assembly and the plurality of battery packs are respectively accommodated in the installation cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010466601.7A CN111541292A (en) | 2020-05-27 | 2020-05-27 | Battery pack system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010466601.7A CN111541292A (en) | 2020-05-27 | 2020-05-27 | Battery pack system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111541292A true CN111541292A (en) | 2020-08-14 |
Family
ID=71980697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010466601.7A Withdrawn CN111541292A (en) | 2020-05-27 | 2020-05-27 | Battery pack system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111541292A (en) |
-
2020
- 2020-05-27 CN CN202010466601.7A patent/CN111541292A/en not_active Withdrawn
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Application publication date: 20200814 |
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