CN112018461A - Battery pack, electric vehicle and energy storage device - Google Patents
Battery pack, electric vehicle and energy storage device Download PDFInfo
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- CN112018461A CN112018461A CN202010847170.9A CN202010847170A CN112018461A CN 112018461 A CN112018461 A CN 112018461A CN 202010847170 A CN202010847170 A CN 202010847170A CN 112018461 A CN112018461 A CN 112018461A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric 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
- H01M10/42—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
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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
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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
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- 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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- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The application discloses battery package, electric motor car and energy memory. The deformation sensing assembly in the battery pack comprises a plurality of deformation sensing units which are respectively arranged between two adjacent single batteries and a deformation sensor which is arranged in the box body and is connected with the deformation sensing units and the battery management system. When the single battery deforms, the deformation sensing unit can sense the deformation quantity of the single battery when the single battery deforms, generate a change signal corresponding to the deformation quantity and transmit the change signal to the deformation sensor; the deformation sensor generates a deformation sensing signal corresponding to the change signal and transmits the deformation sensing signal to the battery management system, and the deformation sensing signal can be timely fed back to the battery management system when the single battery deforms, so that abnormal information of the battery pack can be timely acquired, the hidden danger of the battery pack can be timely eliminated, and the battery pack is prevented from being on fire.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery pack, an electric vehicle and an energy storage device.
Background
The battery pack is a power source of the electric automobile, and most of the existing reasons for the fire of the electric automobile are that the fire phenomenon occurs in the battery pack firstly, so that the whole electric automobile is on fire. The internal fire phenomenon of the Battery pack is usually caused by unsatisfactory monitoring of the internal part of the Battery pack, and particularly when a single Battery in the Battery pack deforms, the single Battery cannot be fed back to a Battery Management System (BMS) in time, so that abnormal information of the Battery pack cannot be obtained in time, and further the hidden danger of the Battery pack cannot be eliminated in time, and the Battery pack is caused to fire.
Disclosure of Invention
The application provides a battery package, electric motor car and energy memory to can not in time feed back to battery management system's problem when solving among the prior art battery package inside battery cell and producing deformation.
In one aspect, the present application provides a battery pack, comprising: the battery management system comprises a box body, a plurality of single batteries arranged in the box body, a deformation sensing assembly and a battery management system arranged in the box body;
the deformation sensing assembly comprises a plurality of deformation sensing units and deformation sensors, the deformation sensing units are respectively arranged between two adjacent single batteries, and the deformation sensors are arranged in the box body and are connected with the deformation sensing units and the battery management system;
the deformation sensing unit senses deformation of the single battery when the single battery deforms, generates a change signal corresponding to the deformation and transmits the change signal to the deformation sensor;
and the deformation sensor generates a deformation sensing signal corresponding to the change signal and transmits the deformation sensing signal to the battery management system.
In some possible implementations, the deformation sensing unit is a strain gauge, and the change signal is a resistance change value of the strain gauge.
In some possible implementations, the deformation sensing unit is further disposed between the case and the single battery.
In some possible implementations, the plurality of unit cells are connected in sequence by a plurality of busbars; the battery pack further comprises a plurality of temperature sensors which are fixedly connected with and contacted with the plurality of busbars respectively;
the temperature sensor is connected with the battery management system and used for sensing the temperature of the battery core of the single battery, generating a temperature sensing signal corresponding to the temperature and transmitting the temperature sensing signal to the battery management system.
In some possible implementations, the plurality of unit cells are connected in sequence by a plurality of busbars; the battery pack further comprises a plurality of voltage sensors which are fixedly connected and contacted with the plurality of busbars respectively;
the voltage sensor is connected with the battery management system and used for sensing the voltage of the battery core of the single battery, generating a voltage sensing signal corresponding to the voltage and transmitting the voltage sensing signal to the battery management system.
In some possible implementations, the battery pack further includes a gas sensor disposed in the case and connected to the battery management system;
the gas sensor senses the concentration of the target gas in the tank, generates a concentration sensing signal corresponding to the concentration of the target gas, and transmits the concentration sensing signal to the battery management system.
In some possible implementations, the battery pack further includes a water accumulation sensor disposed in the case and connected to the battery management system;
the ponding sensor senses the ponding height in the box body, and generates a ponding sensing signal corresponding to the ponding height and transmits the ponding sensing signal to the battery management system.
In some possible implementations, the cell has a length, a width, and a thickness; the length is greater than the width, the width is greater than thickness, the length of battery cell is less than 600 mm.
In some possible implementations, the length of the unit cell is greater than or equal to 500mm and less than 600 mm.
In some possible implementations, the length of the unit cell is greater than or equal to 400mm and less than 500 mm.
In another aspect, the present application also provides an electric vehicle including the battery pack as described above.
In another aspect, the present application further provides an energy storage device including the battery pack as described above.
The application provides a deformation sensing subassembly in battery package includes a plurality of deformation sensing units of locating respectively between two adjacent battery cells, and locates in the box and connect deformation sensing unit and battery management system's deformation sensor. When the single battery deforms, the deformation sensing unit can sense the deformation quantity of the single battery when the single battery deforms, generate a change signal corresponding to the deformation quantity and transmit the change signal to the deformation sensor; the deformation sensor generates a deformation sensing signal corresponding to the change signal and transmits the deformation sensing signal to the battery management system, and the deformation sensing signal can be timely fed back to the battery management system when the single battery deforms, so that abnormal information of the battery pack can be timely acquired, the hidden danger of the battery pack can be timely eliminated, and the battery pack is prevented from being on fire.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of an embodiment of a battery pack provided by an embodiment of the present application;
fig. 2 is a schematic diagram of a water accumulation sensor according to an embodiment of the battery pack provided by the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The battery pack can be applied to an electric vehicle, electric energy is provided for the electric vehicle, and the electric vehicle can be a commercial vehicle, a special vehicle, an electric bicycle, an electric motorcycle or an electric scooter and other vehicles. The deformation sensing assembly in the battery pack comprises a plurality of deformation sensing units which are respectively arranged between two adjacent single batteries and a deformation sensor which is arranged in the box body and is connected with the deformation sensing units and the battery management system. When the single battery deforms, the deformation sensing unit can sense the deformation quantity of the single battery when the single battery deforms, generate a change signal corresponding to the deformation quantity and transmit the change signal to the deformation sensor; the deformation sensor generates a deformation sensing signal corresponding to the change signal and transmits the deformation sensing signal to the battery management system, and the deformation sensing signal can be timely fed back to the battery management system when the single battery deforms, so that abnormal information of the battery pack can be timely acquired, the hidden danger of the battery pack can be timely eliminated, and the battery pack is prevented from being on fire.
Referring to fig. 1, an embodiment of the present application provides a battery pack, including: the battery management system comprises a box body 10, a plurality of single batteries 20 arranged in the box body 10, a deformation sensing assembly 30 and a battery management system 40 arranged in the box body 10;
the deformation sensing assembly 30 includes a plurality of deformation sensing units 31 respectively disposed between two adjacent single batteries 20, and a deformation sensor 32 disposed in the case 10 and connected to the deformation sensing units 31 and the battery management system 40;
the deformation sensing unit 31 senses a deformation amount of the single battery 20 when the single battery is deformed, generates a change signal corresponding to the deformation amount, and transmits the change signal to the deformation sensor 32;
the deformation sensor 32 generates a deformation sensing signal corresponding to the change signal and transmits the deformation sensing signal to the battery management system 40.
It should be noted that the deformation sensing assembly 30 in the battery pack of the present application includes a plurality of deformation sensing units 31 respectively disposed between two adjacent single batteries 20, and a deformation sensor 32 disposed in the case 10 and connected to the deformation sensing units 31 and the battery management system 40. When the single battery 20 deforms, the deformation sensing unit 31 can sense the deformation amount of the single battery 20 when the single battery 20 deforms, generate a change signal corresponding to the deformation amount, and transmit the change signal to the deformation sensor 32; the deformation sensor 32 generates a deformation sensing signal corresponding to the change signal (the deformation sensing signal is a signal that can be identified by the battery management system 40) and transmits the deformation sensing signal to the battery management system 40, and the deformation sensing signal can be timely fed back to the battery management system 40 when the single battery 20 deforms, so that abnormal information of the battery pack can be timely acquired, the battery management system 40 can display and alarm the abnormal information of the battery pack, and also can directly adopt emergency measures to stop charging and discharging of the battery pack, thereby timely eliminating hidden dangers of the battery pack and avoiding fire of the battery pack.
In some embodiments, referring to fig. 1, the battery cell 20 may have any suitable structure and shape, and preferably, the battery cell 20 may be a rectangular battery cell having a rectangular parallelepiped structure and having a length, a width and a thickness; the length is greater than the width, which is greater than the thickness; each single battery 20 is placed in the box 10 in a side-standing manner, the largest surface and the largest surface of two adjacent single batteries 20 are arranged oppositely, the thickness direction of each single battery 20 is a first direction, the length direction is a second direction, the width direction is a third direction, and a plurality of single batteries 20 in each battery pack 20 are sequentially arranged in the box 10 along the first direction.
In some embodiments, the deformation sensing unit 31 is a strain gauge, and the change signal is a resistance change value of the strain gauge. When the battery cell 20 deforms and the strain gauge is squeezed, the resistance value of the deformation gauge after compression is reduced (that is, the resistance change value is a value of the reduction of the resistance value), the value of the reduction of the resistance value corresponds to the deformation amount of the battery cell 20 when the deformation occurs, and thus the deformation sensor 32 can obtain the deformation amount according to the resistance change value. The strain gauge has high sensing accuracy, and has good linear characteristics (i.e., the resistance change value and the compression amount are linear), which is beneficial to monitoring the deformation of the single battery 20. Of course, the deformation sensing unit 31 may also be specifically configured in other structures according to actual situations, and the application is not limited herein.
In some embodiments, the deformation sensing unit 31 is further disposed between the box body 10 and the single battery 20, that is, between the largest surface of the single battery 20 and the box body 10, so as to avoid the situation that the single battery 20, which is closest to the box body 10, deforms toward the box body 10 and cannot be monitored, and further improve the accuracy of deformation monitoring.
Further, the deformation sensing unit 31 may be bonded between the case 10 and the battery cells 20 and between every two adjacent battery cells 20 through a fixing material (e.g., a glue), and contact the battery cells 20 and the case 10, so that when a slight deformation of the battery cells 20 can be detected, the accuracy of the deformation detection is further improved.
In some embodiments, referring to fig. 1, the plurality of unit batteries 20 are sequentially connected by a plurality of bus bars 21; the battery pack further includes a plurality of temperature sensors 50 fixedly connected to and in contact with the plurality of bus bars 21, respectively;
the temperature sensor 50 is connected to the battery management system 40, and is configured to sense a temperature of the battery cells of the single batteries 20, generate a temperature sensing signal corresponding to the temperature (the temperature sensing signal is a signal that can be identified by the battery management system 40), and transmit the temperature sensing signal to the battery management system 40. Because the busbar 21 is a pole for connecting the single battery 20, and the pole is a battery core connected inside the single battery 20, the temperature change of the battery core of the single battery 20 can be timely fed back to the battery management system 40 through the temperature sensor 50, and then the temperature change of the battery core can be monitored, so that the safety performance of the battery pack is improved.
Specifically, the number of the temperature sensors 50 may be specifically set according to actual conditions, and the application is not limited herein. For example, one temperature sensor 50 is provided for each of the busbars 21, so that the voltage change of the cells of each of the unit batteries 20 is monitored.
In some embodiments, referring to fig. 1, the plurality of unit batteries 20 are sequentially connected by a plurality of bus bars 21; the battery pack further includes a plurality of voltage sensors 60 fixedly connected to and in contact with the plurality of bus bars 21, respectively;
the voltage sensor 60 is connected to the battery management system 40, and is configured to sense a voltage of a cell of the battery cell 20, and generate a voltage sensing signal corresponding to the voltage (the voltage sensing signal is a signal that can be identified by the battery management system 40) and transmit the voltage sensing signal to the battery management system 40. Because the busbar 21 is a pole for connecting the single battery 20, and the pole is a battery core connected inside the single battery 20, the voltage change of the battery core of the single battery 20 can be timely fed back to the battery management system 40 through the voltage sensor 60, and then the voltage change of the battery core can be monitored, so that the safety performance of the battery pack is improved.
Specifically, the number of the temperature sensors 50 may be specifically set according to actual conditions, and the application is not limited herein. For example, one voltage sensor 60 is provided for each bus bar 21, so that the voltage change of the cell of each unit battery 20 is monitored.
In some embodiments, referring to fig. 1, the battery pack further includes a gas sensor 70 disposed in the case 10 and connected to the battery management system 40;
the gas sensor 70 senses the concentration of the target gas in the case 10, and generates a concentration sensing signal corresponding to the concentration of the target gas, which is a signal that can be recognized by the battery management system 40, and transmits the concentration sensing signal to the battery management system 40. The target gas may be a gas generated by an internal reaction of the single battery 20, and when the concentration of the target gas reaches a certain value, it indicates that the single battery 20 may be damaged to cause gas leakage, and the concentration of the target gas may be fed back to the battery management system 40 in time through the gas sensor 70, so that the gas leakage condition of the single battery 20 may be monitored, and the safety performance of the battery pack may be improved.
In some embodiments, referring to fig. 1 and 2, the battery pack further includes a water accumulation sensor 80 disposed in the case 10 and connected to the battery management system 40;
the water accumulation sensor 80 senses the height of the accumulated water in the tank 10, generates a water accumulation sensing signal corresponding to the height of the accumulated water (the water accumulation sensing signal is a signal that can be recognized by the battery management system 40), and transmits the water accumulation sensing signal to the battery management system 40. When ponding height reachd a definite value, it has probably produced the damage and lead to the weeping to show that battery cell 20, perhaps, battery package leakproofness goes wrong, makes outside steam enter into the inside ponding that produces of battery package, can highly in time feed back ponding to battery management system 40 through ponding sensor 80, and then can monitor battery cell 20's weeping or the condition that battery package leakproofness goes wrong to improve battery package's security performance.
Further, the box body 10 comprises a bottom plate 11 and a side frame 12 connected with the bottom plate 11; the probe of the water accumulation sensor 80 comprises at least one probe 81 which is in contact with the bottom plate 11, and the height of the accumulated water in the box body 10 is sensed through the probe 81. In addition, the bottom of the probe 81 is insulated to avoid short circuits between multiple probes 81.
In some embodiments, referring to fig. 1, the box 10 further includes a partition 13 connected to the side frame 12, the partition 13 divides the accommodating cavity defined by the bottom plate 11 and the side frame 12 into a battery accommodating cavity and a non-battery accommodating cavity, the plurality of single batteries 20 are located in the battery accommodating cavity, and the battery management system 40 is located in the non-battery accommodating cavity. The deformation sensor 32 and the gas sensor 70 may be located on the partition 13 and fixedly connected to the partition 13.
In some embodiments, the battery cell 20 includes a battery housing 22, and two poles of the battery cell 20 are located at the top of the battery housing 22, so that not only two sides of the battery cell 20 can be in contact with the box 10 more tightly, the space utilization rate is improved, but also the bus bar 21 can be more convenient to connect two adjacent battery cells 20, and each sensor can be more convenient to set.
Further, the battery case 22 is made of a metal material, which has good heat conductivity, so that not only the heat dissipation effect of the battery cells 20 can be improved, but also the battery case 22 itself has a certain strength, and the strength of the whole battery pack can be improved by arranging the plurality of battery cells 20 in the case 10.
In some embodiments, since the vehicle body width is very long, for example, 1.2m to 2.3m, and the vehicle body length is also very long, for example, 2m to 5m, for a medium-sized or large-sized electric vehicle with a long vehicle body width and length, if a plurality of single batteries 20 are arranged in a row, the length of the single battery 20 needs to be very long, however, the length of the single battery 20 cannot be lengthened without limitation (the voltage of the single battery 20 is constant, the volume of the single battery 20 is also constant, if the length is increased, the thickness and the width are reduced, the space for accommodating the battery in the vehicle body is limited, the width is limited, and the thickness is also limited due to the need of adding electric cores and other materials inside the single battery 20), therefore, the length of the single battery 20 may not be made to be the actually required length, and therefore, the present application may arrange a plurality of single batteries 20 in multiple rows, the length of each single battery 20 can be made shorter, which is beneficial to the manufacture of the single battery 20 and can ensure the strength of the single battery 20.
Further, the length of the single battery 20 is less than 600mm, so that the single battery 20 can be ensured to have a certain heat dissipation area, the manufacturing of the single battery 20 is facilitated, and the strength of the single battery 20 can be ensured. Preferably, the length of the single battery 20 is greater than or equal to 500mm and less than 600mm, or the length of the single battery 20 is greater than or equal to 400mm and less than 500mm, which is the preferable length data obtained empirically in the practical manufacturing of the present application, and the single batteries 20 of these lengths are more favorably arranged in a plurality of rows in the case 10.
The invention also provides an electric vehicle which comprises the battery pack. The safety performance of the battery pack is good.
The invention also provides an energy storage device which comprises the battery pack.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again.
In a specific implementation, each component or structure may be implemented as an independent entity, or may be combined arbitrarily and implemented as one or several entities, and the specific implementation of each component or structure may refer to the foregoing embodiments, which are not described herein again.
The battery pack, the electric vehicle and the energy storage device provided by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the embodiment of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (12)
1. A battery pack, comprising: the battery management system comprises a box body, a plurality of single batteries arranged in the box body, a deformation sensing assembly and a battery management system arranged in the box body;
the deformation sensing assembly comprises a plurality of deformation sensing units and deformation sensors, the deformation sensing units are respectively arranged between two adjacent single batteries, and the deformation sensors are arranged in the box body and are connected with the deformation sensing units and the battery management system;
the deformation sensing unit senses deformation of the single battery when the single battery deforms, generates a change signal corresponding to the deformation and transmits the change signal to the deformation sensor;
and the deformation sensor generates a deformation sensing signal corresponding to the change signal and transmits the deformation sensing signal to the battery management system.
2. The battery pack according to claim 1, wherein the deformation sensing unit is a strain gauge, and the change signal is a resistance change value of the strain gauge.
3. The battery pack according to claim 1, wherein the deformation sensing unit is further provided between the case and the battery cell.
4. The battery pack according to claim 1, wherein the plurality of unit batteries are sequentially connected by a plurality of bus bars; the battery pack further comprises a plurality of temperature sensors which are fixedly connected with and contacted with the plurality of busbars respectively;
the temperature sensor is connected with the battery management system and used for sensing the temperature of the battery core of the single battery, generating a temperature sensing signal corresponding to the temperature and transmitting the temperature sensing signal to the battery management system.
5. The battery pack according to claim 1, wherein the plurality of unit batteries are sequentially connected by a plurality of bus bars; the battery pack further comprises a plurality of voltage sensors which are fixedly connected and contacted with the plurality of busbars respectively;
the voltage sensor is connected with the battery management system and used for sensing the voltage of the battery core of the single battery, generating a voltage sensing signal corresponding to the voltage and transmitting the voltage sensing signal to the battery management system.
6. The battery pack of claim 1, further comprising a gas sensor disposed in the case and connected to the battery management system;
the gas sensor senses the concentration of the target gas in the tank, generates a concentration sensing signal corresponding to the concentration of the target gas, and transmits the concentration sensing signal to the battery management system.
7. The battery pack of claim 1, further comprising a water accumulation sensor disposed in the case and connected to the battery management system;
the ponding sensor senses the ponding height in the box body, and generates a ponding sensing signal corresponding to the ponding height and transmits the ponding sensing signal to the battery management system.
8. The battery pack according to any one of claims 1 to 7, wherein the unit cells have a length, a width, and a thickness; the length is greater than the width, the width is greater than thickness, the length of battery cell is less than 600 mm.
9. The battery pack according to claim 8, wherein the length of the unit cells is greater than or equal to 500mm and less than 600 mm.
10. The battery pack according to claim 8, wherein the length of the unit cells is greater than or equal to 400mm and less than 500 mm.
11. An electric vehicle comprising the battery pack according to any one of claims 1 to 10.
12. An energy storage device comprising the battery pack according to any one of claims 1 to 10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010847170.9A CN112018461A (en) | 2020-08-21 | 2020-08-21 | Battery pack, electric vehicle and energy storage device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010847170.9A CN112018461A (en) | 2020-08-21 | 2020-08-21 | Battery pack, electric vehicle and energy storage device |
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| CN202010847170.9A Pending CN112018461A (en) | 2020-08-21 | 2020-08-21 | Battery pack, electric vehicle and energy storage device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114102524A (en) * | 2021-11-23 | 2022-03-01 | 江苏双双高新科技有限公司 | Electric tool with environment monitoring function based on sensing technology |
| WO2022174728A1 (en) * | 2021-02-22 | 2022-08-25 | 珠海迈巨微电子有限责任公司 | Battery deformation detection apparatus and battery management system |
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