WO2018205598A1 - 电池包、电池储能系统和电动汽车 - Google Patents

电池包、电池储能系统和电动汽车 Download PDF

Info

Publication number
WO2018205598A1
WO2018205598A1 PCT/CN2017/115812 CN2017115812W WO2018205598A1 WO 2018205598 A1 WO2018205598 A1 WO 2018205598A1 CN 2017115812 W CN2017115812 W CN 2017115812W WO 2018205598 A1 WO2018205598 A1 WO 2018205598A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
battery pack
pressure
hard
plate
Prior art date
Application number
PCT/CN2017/115812
Other languages
English (en)
French (fr)
Inventor
杨同欢
何欢
周岿
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP17909601.1A priority Critical patent/EP3621128A4/en
Publication of WO2018205598A1 publication Critical patent/WO2018205598A1/zh

Links

Images

Classifications

    • 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
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
    • 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
    • H01M10/4285—Testing apparatus
    • 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
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • 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
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • 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

Definitions

  • the present application relates to the field of energy and, more particularly, to a battery pack, a battery energy storage system, and an electric vehicle.
  • the pressure sensor is usually used to monitor the pressure of the battery under the above various conditions.
  • the existing battery pack with pressure monitoring function mainly installs a pressure sensor between the battery pack outer package and the battery module, the battery unit in the battery module adopts a soft pack battery, and the battery pack outer package is bundled by multiple pieces. With the belt structure, the battery pack of this structure has a short service life and is not safe.
  • the present application provides a battery pack, a battery energy storage system, and an electric vehicle, which have a simple structure and can improve safety performance.
  • a battery pack in a first aspect, includes: a battery module and a pressure sensing device, the battery module includes a plurality of rigid battery cells and two end plates, the plurality of hard battery cells The body adopts a laminated arrangement, and the two end plates are respectively disposed along the thickness direction of the hard battery cell for the plurality of hard battery cells and the pressure sensing disposed between the two end plates Pressing the device; the pressure sensing device includes a first pressure plate and at least one pressure sensor disposed on the first pressure plate, the first pressure plate being disposed in the first hard battery cell of the plurality of hard battery cells Above, and completely covering the front surface of the first hard battery cell, that is, the first pressure plate is located between the first hard battery cell and the at least one pressure sensor. The first pressure plate is used to transmit the expansion force of the hard battery cell in the thickness direction to the at least one pressure sensor, and the at least one pressure sensor is used to monitor the expansion force.
  • the hard battery cell refers to a certain deformation in the thickness direction of the battery cell when the battery expands.
  • the outer casing of the battery cell may be a hard material, for example, the outer casing may It is a steel shell or an aluminum shell.
  • the battery cell can be a common prismatic battery, that is to say the surface of the battery cell is square.
  • the use of a hard-shell battery can improve the battery life cycle and safety performance, and the expansion force of the battery cell in the thickness direction can be transmitted to the pressure sensor by means of a pressure plate, thereby eliminating the influence of irregular expansion of the battery cell.
  • the battery cells can be connected in series or in parallel.
  • the plurality of batteries can also be used to enhance the mechanical strength of the module by using structural adhesives or the like between the battery cells.
  • the first battery cell is a first battery cell on a first end plate side of the two end plates, and the at least one pressure sensor is disposed on the first end plate and the first battery Between a platen.
  • the pressure sensing device can be disposed between the two end plates and the battery cells, that is, one pressure sensing device is placed on each side.
  • the pressure sensing device further includes a second pressure plate, wherein the second pressure plate is located when the pressure sensing device is disposed between the first end plate and the first battery unit Between the first end plate and the at least one pressure sensor, when the pressure sensing device is disposed between the first battery cell and the second battery cell of the plurality of battery cells, the second pressure plate is located The second battery cell is between the at least one pressure sensor. The first pressure plate is disposed between the first hard battery cell and the at least one pressure sensor.
  • one pressure sensing device may be disposed between the end plates and the battery cells, and another pressure sensing device may be disposed between the two battery cells.
  • the battery pack further includes: a guiding member for guiding the pressure plate to move in a thickness direction of the battery cell.
  • the guiding member is a plurality of sliding shafts fixed between the first end plate and the second end plate, and the plurality of sliding shafts extend through the pressing plate.
  • the sliding shaft can be fixed in the form of a bolt or a screw hole or a welding method.
  • the guide is four sliding shafts that are parallel and evenly distributed at the four corners of the pressure plate.
  • the guide may also be a chute or a slide rail.
  • the battery module further includes: a battery measuring unit BMU for transmitting the value of the expansion force monitored by the pressure sensing device to the external battery management system BMS.
  • the battery module may not include the BMU, and the value monitored by the pressure sensing device in the plurality of battery modules may be directly transmitted to the external BMS, and the BMS manages the status of each module.
  • the plurality of battery cells have the same shape
  • the battery package further includes: a battery package outer casing, the battery package outer casing includes a bottom plate, two side plates, and a top cover, wherein the battery module is fixed to On the bottom plate, the two side plates are used to align the battery module, and the top cover plate is used to encapsulate the top of the battery module.
  • the battery module further includes a circuit isolation board disposed between the top of the battery module and the top cover for connecting the battery module The battery module is isolated.
  • Using line isolation boards can reduce line shorts caused by line wear or other damage.
  • the battery pack includes a plurality of battery modules of the same specification, and the plurality of battery modules of the same specification are fixedly placed on the bottom plate in the same manner.
  • the two end plates, the two side plates and the bottom plate are linked by riveting or welding.
  • the outer casing of the battery cell is a steel shell or an aluminum shell.
  • each of the at least one pressure sensor is transmitted by resistance strain
  • the sensor composition, or each of the pressure sensors is composed of a resistance strain sensor, an electronic amplifier, an analog to digital converter, and a microprocessor.
  • the battery pack is applied to an electric vehicle, a base station energy storage, a data center backup energy storage, an uninterruptible power supply UPS, or an energy storage power station.
  • a battery energy storage system comprising the battery pack and battery management system BMS of any of the above first aspects; and a pressure sensing device in each of the at least one battery pack They are respectively used to monitor the expansion force in the thickness direction of the battery cells in the battery pack; the BMS is used to determine the corresponding battery pack according to the change of the expansion force monitored by the pressure sensing device in each battery pack. status.
  • the battery energy storage system is applied to an electric vehicle, and the pressure sensing device in the first battery pack of the at least one battery pack faces the traveling direction of the electric vehicle.
  • an electric vehicle comprising any of the battery energy storage systems of the above second aspect.
  • 1 is a battery pack with a pressure monitoring function in the prior art.
  • FIG. 2 is a schematic structural diagram of a battery pack provided by an embodiment of the present application.
  • FIG. 3 is another schematic structural diagram of a battery pack provided by an embodiment of the present application.
  • FIG. 4 is a top view and a front view of a pressure sensing device according to an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a battery energy storage system provided by an embodiment of the present application.
  • FIG. 6 is still another schematic structural diagram of a battery pack provided by an embodiment of the present application.
  • Lithium-ion battery has become the ideal power source for a new generation of electric vehicles with its excellent performance. It has light weight, large energy storage, high power, no pollution, no secondary pollution, long life, small self-discharge coefficient and temperature adaptation range. Broad, it is an ideal vehicle battery for electric bicycles, electric motorcycles, electric cars, electric large trucks, etc.
  • lithium-ion batteries may be due to phase change, particle packing mode, and side reaction products during use. Accumulation, gas production and other reasons lead to different degrees of battery expansion.
  • lithium-ion batteries in electric vehicles are arranged in groups. The accumulation of volume expansion of multiple batteries will stress the fixing devices in the module. When the stress accumulation is too large, the module fixing device will be damaged and bring failure. And security risks. For example, lithium-ion batteries spontaneously generate fire and explosion, which can cause serious safety problems.
  • the battery is very important as the core component of the electric car, but the maximum pressure it can withstand is limited when the pressure is super A certain value is that it will affect the charge and discharge performance of the battery. When the pressure is too high, the battery case may even be broken and the battery may be out of control. Therefore, there is currently a battery pack in which a pressure sensor is installed between the outer pack of the battery pack and the battery core, but the battery pack is suitable for a flexible package battery and can only monitor the battery bulging.
  • the battery pack outer package 103 , the battery unit core 101 composed of a plurality of single cells 1001 connected in series or in parallel, and at least one pressure sensor 104 are included.
  • the single cell 1001 is a soft pack battery, and the typical feature is that an aluminum plastic film is used as a packaged battery.
  • the battery core 101 is bundled or packaged and fixed by the outer package 103.
  • the outer package 103 may be composed of multiple bundles or may be used. Housing package.
  • the pressure sensor 104 is disposed between the battery core 101 and the outer package 103, and the pressure sensor 104 has a certain force with the battery core and the outer package 103. Assume that the pressure of the pressure sensor 104 is F0 when the battery pack is normally normal.
  • the signal output of the pressure sensor 104 is coupled to a battery management system (BMS) 102.
  • BMS battery management system
  • the working principle is: When any battery in the battery pack bulges, pressure will be generated externally, and the pressure will be transmitted through the adjacent cells. Due to the deformation characteristics of the soft pack battery, the battery core will generate external pressure in all directions.
  • the pressure sensor is between 103 and 101 and can detect pressure changes. And by setting the pressure upper limit value F1 at the pressure sensor, when the detected pressure is greater than F1, the pressure sensor 104 outputs a signal to the battery pack to judge the battery pack to swell.
  • the battery pack mainly solves the expansion of the soft pack case battery, because the outer shell of the soft pack shell is soft, and the battery bulging is squeezed, and the bulging force is transmitted in all directions, no matter what position the pressure sensor is set, when the battery bulges differently The position of the pressure sensor monitors the same value, so this battery pack can only monitor the pressure rise caused by battery bulging in the battery pack. In other words, it is only possible to monitor whether the battery in the battery pack is inflated or not, and it is not possible to accurately monitor the specific pressure that the system in which the battery pack structural member is subjected in a certain direction.
  • Embodiments of the present application are based on the problems found in monitoring pressure in the above-described soft pack batteries, and the pressure is monitored in a hard-shell lithium ion battery.
  • the embodiment of the present application provides a battery pack 200.
  • the battery pack 200 includes a battery module 210 and a pressure sensing device 220.
  • the battery module 210 includes a plurality of rigid battery cells and two The end plates, the plurality of rigid battery cells are arranged in a stack, and the two end plates are respectively disposed on two faces in the thickness direction of the hard battery cell, and are used for the plurality of hard battery cells And the pressure sensing device 220 disposed between the two end plates is pressed; the pressure sensing device 220 includes a first pressure plate 221 and at least one pressure sensor 222 disposed on the first pressure plate 221, the first The pressure plate 221 is disposed on the first hard battery cell 211 of the plurality of rigid battery cells, and completely covers the surface of the first battery cell 211, that is, the first pressure plate 221 is located on the first hard battery The monomer 211 is between the at least one pressure sensor 222.
  • the first pressure plate 221 is configured to transmit the expansion force in the thickness direction of the battery cell to the at least one pressure sensor 222, and the at least one pressure sensor 222 is configured to monitor the expansion force.
  • the battery pack can be applied to a lithium ion battery energy storage system such as an electric vehicle, a base station energy storage, a data center backup energy storage, an uninterruptible power system (UPS), or a storage power station.
  • a lithium ion battery energy storage system such as an electric vehicle, a base station energy storage, a data center backup energy storage, an uninterruptible power system (UPS), or a storage power station.
  • UPS uninterruptible power system
  • the following is only an example of a battery pack used in an electric vehicle.
  • the embodiments of the present application are not limited thereto.
  • the hard battery compared with the soft pack battery, the hard battery has a high advantage in terms of use cycle and safety performance, and the hard battery is dustproof and waterproof, and is not easy to leak. Therefore, in the embodiment of the present application, the battery cell used is a hard material or the outer casing of the battery cell is a hard outer casing, for example, a steel shell or an aluminum shell.
  • the battery module composed of the hard shell battery usually includes at least one battery unit. If the battery module is composed of a plurality of battery cells, the plurality of battery cells may be multiple identical battery cells. For example, the specifications are the same size, the outer casing materials are the same, and the like. It can also be the same material of the outer casing but different sizes.
  • lithium ion batteries mainly include cylindrical batteries and prismatic batteries, and embodiments of the present application are mainly directed to improvements made to prismatic batteries. That is to say, the surface of the battery cell is square.
  • the embodiment of the present application is not limited thereto.
  • the surface of the battery cell may be a cake or the like as long as the laminated arrangement can be performed.
  • the plurality of prismatic batteries can also be used to enhance the mechanical strength of the module by using structural adhesives or the like between the battery cells.
  • a pressure sensor can be added between the battery modules.
  • a pressure sensor can be placed between the end plates and the battery cells, and a pressure sensor can be placed on one side. It is also possible to place a pressure sensor on both sides, that is, between the two end plates and the module, or between the modules, that is, a pressure sensor between two battery cells in the battery module.
  • F0 can also be considered as a value of the horizontal force applied to the pressure sensor to be fixed between the battery modules without being affected by gravity.
  • the number of pressure sensors placed on the same plane may be unlimited, for example, assuming that the pressure sensor is placed between the end plate and the battery cell, it may be placed at the four corners of the battery cell and at the center position.
  • the pressure sensor when the battery cells in the battery module expand, can combine the values monitored on the five pressure sensors to determine the force of the actual battery cells. As long as the pressure sensor is evenly distributed on the surface of the battery cell, the pressure measurement of the battery pack can be better achieved.
  • the number of the pressure sensors can be reduced.
  • a pressure sensor can be placed on a flat surface.
  • a pressure plate can be used to increase the area for transmitting the expansion force.
  • the first hard battery cell (211) is the first battery cell on the first end plate (212) side of the two end plates, and the at least one pressure sensor (222) is disposed on Between the first end plate (212) and the first pressure plate (221).
  • the pressure sensing device can be disposed between the end plate and the battery cell.
  • the pressure plate is usually in contact with the battery cell, and the pressure sensor is placed between the pressure plate and the end plate.
  • the area of the pressure plate may be greater than the force receiving area of the pressure sensor. Further, the area of the pressure plate may be greater than or equal to the battery cell. The area of the surface. In other words, that is, the width and height of the pressure plate are greater than or equal to the width and height of the front surface of the battery cell.
  • the pressure plate also needs to have sufficient rigidity, and the specific bearing force and deformation range need to be designed according to the weight of the module and the pre-tightening force. As shown in FIG. 3, the pressure sensing device can be disposed between the two battery cells 211 and 213.
  • the pressure plates 221 and 223 can be used to increase the transmission expansion.
  • the area of force In other words, two pressure plates are respectively fixed on the two battery cells, and a pressure sensor is placed between the two pressure plates.
  • the battery package 200 further includes: a battery package casing 240, the battery package casing 240 includes a bottom plate 241, two side plates 242, and a top cover 243.
  • the battery module 210 is fixed on the bottom plate 241.
  • the two side plates 242 are used to align the battery module 210.
  • the top cover 243 is used to package the top of the battery module 210.
  • the battery cells in the battery module can be connected in series or in parallel.
  • the batteries in the battery module can be arranged in a stack, and the side plates can be placed on both sides of the battery to make the batteries arranged neatly, and The mechanical strength of the module in the direction of stacking the battery is ensured, and the bottom plate of the battery is placed to support the battery unit, and the battery module fixing device can be installed on the bottom of the battery, so that at least one battery module is fixed on the bottom plate, and the battery module is fixed.
  • the tightening force presses the battery tightly, and maintains the pre-tightening force to be connected with the side plate and the bottom plate, and the connection manner can be riveted, welded or the like.
  • the top of the battery module is the top cover, which seals the module connection line.
  • the battery pack can be connected to some control units through a connecting wire or the like, and these connecting wires may wear or other damage after a certain time, thereby causing a short circuit, so that, further, the top and top of the battery module can be A line spacer 216 is placed between the covers for isolating the battery connection from the battery body.
  • the battery pack 200 further includes: a guiding member 230 for guiding the pressing plate to move along the thickness direction of the battery unit.
  • a sliding shaft or a chute or the like may be used.
  • a plurality of sliding shafts may be fixedly disposed between the first end plate and the second end plate, and the first pressing plate 221 and/or the second pressing plate 223 respectively have circular holes that cooperate with the plurality of sliding shafts, and The cooperation between the circular hole and the sliding shaft should ensure that the pressure plate can only move in the thickness direction of the battery cell.
  • the area of the pressure plate should be larger than the front surface area of the battery cell. For example, at least the height of the pressure plate should be greater than the height of the battery cell.
  • Two sliding shafts can be disposed above the pressure plate, and the width of the pressure plate can be ensured to be larger than
  • the width of the battery cell can be set to four sliding axes at the four corners of the platen. Further, the four sliding shafts may be distributed in parallel and evenly at the four corners of the pressure plate. It should also be understood that the number of sliding shafts should be unlimited.
  • the fixing manner of the sliding shaft between the first end plate and the second end plate is not limited, and may be a bolt screw hole or a welding method. It is also possible to provide chutes or rails on the side panels on both sides. For example, there may be a beam on the side panel and a downward beam on each side of the platen, the two beams mating so that the platen can just move along the thickness of the battery cell.
  • the pressure sensing device 220 may be integrated with the battery module, or may be separately designed and installed into the battery module.
  • the pressure sensing device 220 can include two pressure plates, a first pressure plate 221 and a second pressure plate 223, four sliding shafts 231, and at least one pressure sensor 222.
  • the second pressure plate 223 is located between the first end plate 212 and the at least one pressure sensor 222.
  • the second pressure plate is located at the second A rigid battery cell (213) is interposed between the at least one pressure sensor 222.
  • the first pressure plate 221 is located between the first hard battery cell 211 and the at least one pressure sensor 222.
  • the top view shown in the upper part of Fig. 4 and the front view shown in the lower part of Fig. 4 are shown.
  • the two pressure plates 221 and 223 may be the same size, and the pressure plate is used to eliminate the influence of the irregular expansion of the battery cell and transmit the expansion force to the pressure sensor, and the sliding shaft 231 is used to regulate the moving direction of the pressure plate, the pressure.
  • the pressure sensor needs to adopt a digital sensor, preferably a resistance strain type weighing sensor, which may be composed of a resistance strain sensor, or may be composed of a resistance strain sensor, an electronic amplifier, an analog-to-digital converter and a microprocessor, wherein the resistance strain sensor Capacitive, photoelectric sensors, etc. can also be used.
  • the working process can be: the pressure plate is squeezed by the battery and the battery end plate, and the accumulated expansion force in the thickness direction of the battery in the module is transmitted to the pressure sensor, converted into an electric signal, and amplified by the method, and converted into pressure by the processor.
  • the numerical digital signal is transmitted to the controller.
  • the battery pack 200 may include at least one of the above battery modules and corresponding pressure sensing devices.
  • the plurality of battery modules 210 of the same specification are fixedly placed on the bottom plate 241 in the same manner.
  • a pressure sensing device can be placed in each battery module.
  • the battery module 210 further includes a battery measurement unit (BMU) 215, and the value of the expansion force monitored by the pressure sensing device 220 in the battery module is transmitted to the external battery. Management system.
  • BMU battery measurement unit
  • FIG. 5 another schematic diagram of the battery pack of the embodiment of the present application is given.
  • the battery pack case is omitted, and only the bottom plate of the battery pack is shown.
  • four modules are placed in the same direction.
  • Each battery module has 12 square hard-shell batteries, and the module includes two end plates.
  • the pressure sensing device needs to be placed at the end plate position of each module, and each module includes at least one pressure sensing device, which can be optionally installed at the front end plate 212 or the rear end plate. It can also be installed on both sides.
  • the embodiment of the present application further provides a battery energy storage system 300 including at least one of the above battery pack 200 and BMS 310; a pressure sensing device in each of the at least one battery pack 200 220 is respectively used to monitor the expansion force in the thickness direction of the battery cells in the battery pack; the BMS 310 is used to determine the corresponding battery pack according to the change of the expansion force monitored by the pressure sensing device in each battery pack. The state of the place.
  • a battery pack has four modules 210, a pressure sensing device 220, a battery pack casing 240, and a BMU 215.
  • a BMS 310 and a relay system 400 connected to the BMU of each module are schematically illustrated.
  • a thermal management system 500, a micro control unit 600 (MCU), a vehicle control unit 700 (VCU), and a vehicle alarm 800 connection that cooperate with the BMS.
  • the battery module consists of 12 square batteries, which are stacked and fixed in the same way, and pressure sensing devices are placed on one end plate.
  • Each module is provided with a battery test unit BMU, positive and negative battery, pressure sensing device and The BMU is connected, and the BMU transmits the monitored signal to the BMS.
  • the BMS performs calculation and judgment, and transmits control or warning signals to the relay system, the thermal management system, the MCU, the VCU, and the vehicle.
  • the battery energy storage system 300 can be applied to an electric vehicle, and the pressure sensing device 220 in the first battery pack 200 of the at least one battery pack faces the traveling direction of the electric vehicle. .
  • the battery pack in the battery energy storage system corresponds to the battery pack 200 in the above embodiment
  • the pressure sensing device in the battery energy storage system corresponds to the pressure sensing device 220 in the above embodiment.
  • the structure of the battery pack included in the battery energy storage system is similar to the structure mentioned in the above embodiment, and is not described herein for brevity.
  • the battery energy storage system can also be applied to the above-mentioned base station energy storage, data center backup energy storage, uninterruptible power supply UPS or energy storage power station, and the embodiment of the present application is not limited thereto.
  • the battery energy storage system 300 is applied to an electric vehicle, and the pressure sensing device 220 in the first battery pack 200 of the at least one battery pack faces the traveling direction of the electric vehicle.
  • the embodiment of the present application also provides an electric vehicle 1000, which may include any of the above battery energy storage systems.
  • the battery energy storage system in the electric vehicle 1000 of the embodiment of the present application corresponds to the battery energy storage system 300 described above, and the internal structure thereof is similar to the structure of the battery pack 200 described above, and is not described herein for brevity.
  • the similar structural device of the present application can also be used to monitor battery expansion and failure of the energy storage system.
  • digital product batteries for flexible packaging batteries, battery failure and explosion are often accompanied by battery expansion.
  • systems such as mobile phones, tablets, and laptops, similar systems can be installed to prevent product damage caused by battery expansion and reduce battery explosion and burning. The probability of a problem.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

提供一种电池包（200）、电池储能系统（300）和电动汽车（1000），该电池包（200）包括：电池模组（210）和压力传感装置（220），该电池模组（210）包括多个硬质电池单体（211、213）和两个端板，该两个端板分别沿该硬质电池单体（211、213）的厚度方向设置，用于将该多个硬质电池单体（211、213）以及设置于该两个端板之间的压力传感装置（220）压紧；该压力传感装置（220）包括第一压板（221）和设置于该第一压板（221）上面的至少一个压力传感器（222），该第一压板（221）设置于第一硬质电池单体（211）的上面，且完全覆盖该第一硬质电池单体（211）的表面，该第一压板（221）用于将该电池单体的厚度方向的膨胀力传递给该至少一个压力传感器（222），该至少一个压力传感器（222）用于对该膨胀力进行监测。电池包（200）、电池储能系统（300）和电动汽车（1000）结构简单，并且能够提高安全性能。

Description

电池包、电池储能系统和电动汽车
本申请要求于2017年5月9日提交中国专利局、申请号为201710320508.3、申请名称为“电池包、电池储能系统和电动汽车”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及能源领域，并且更具体地，涉及一种电池包、电池储能系统和电动汽车。
背景技术
电池包作为能源领域中电池储能系统中的主要部件，如果发生碰撞，异物侵入电池舱，或由于各种原因导致锂离子电池自发产生起火、爆炸，会带来严重的安全问题。针对这些问题，通常会采用压力传感器的方式对电池在上述各种情况下所承受的压力进行监测。现有的具有压力监测功能的电池包主要是在电池组外包装与电池模组之间安装压力传感器，电池模组中的电池单体采用软包电池，以及电池组外包装是由多条捆绑带构成，这种结构的电池包使用周期较短且安全性能不高。
发明内容
本申请提供一种电池包、电池储能系统和电动汽车，结构简单，并且能够提高安全性能。
第一方面，提供了一种电池包，该电池包包括：电池模组和压力传感装置，该电池模组包括多个硬质电池单体和两个端板，该多个硬质电池单体采用叠层排布，该两个端板分别沿该硬质电池单体的厚度方向设置，用于将该多个硬质电池单体以及设置于该两个端板之间的压力传感装置压紧；该压力传感装置包括第一压板和设置于该第一压板上面的至少一个压力传感器，该第一压板设置于该多个硬质电池单体中第一硬质电池单体的上面，且完全覆盖该第一硬质电池单体的正面，即该第一压板位于该第一硬质电池单体与该至少一个压力传感器之间。该第一压板用于将该硬质电池单体的厚度方向的膨胀力传递给该至少一个压力传感器，该至少一个压力传感器用于对该膨胀力进行监测。
与软包电池相比，硬质电池单体是指在电池发生膨胀时主要是电池单体的厚度方向产生一定形变，具体地，该电池单体的外壳可以是硬质材料，例如，外壳可以是钢壳或铝壳等。
该电池单体可以是常见的方形电池，也就是说电池单体的表面是方形。
采用硬壳电池，能够提高电池使用周期以及安全性能，并且采用压板的方式将电池单体的厚度方向的膨胀力传递给压力传感器，能够消除电池单体不规则膨胀的影响。
可选地，也可以直接在端板和电池单体之间或者两个电池单体之间直接放置多个压力 传感器。换句话说，也可以不需要压板，将压力传感器直接与电池单体或端板接触。
电池单体间可以采用串联或并联联接，该多个电池之间除了由模组外壳提供的机械力，也可以在电池单体之间用结构胶等辅助手段来增强模组机械强度。
在一种可能的实现方式中，该第一电池单体为该两个端板中第一端板侧的第一个电池单体，该至少一个压力传感器设置于该第一端板和该第一压板之间。
可选地，该压力传感装置可以分别设置在两个端板与电池单体之间，即每一侧放置一个压力传感装置。
在一种可能的实现方式中，该压力传感装置还包括第二压板，当该压力传感装置布置在该第一端板与该第一电池单体之间时，该第二压板位于该第一端板与该至少一个压力传感器之间，当该压力传感装置布置在该第一电池单体和该多个电池单体中的第二电池单体之间时，该第二压板位于该第二电池单体与该至少一个压力传感器之间。该第一压板设置于该第一硬质电池单体与该至少一个压力传感器之间。
可选地，可以将一个压力传感装置设置在端板与电池单体之间，另一个压力传感装置设置在两个电池单体之间。
在一种可能的实现方式中，该电池包还包括：引导件，用于引导压板沿该电池单体的厚度方向上移动。
在一种可能的实现方式中，该引导件为多个滑动轴，该多个滑动轴固定于该第一端板和该第二端板之间，且该多个滑动轴贯穿该压板。
滑动轴的固定方式可以是螺栓和螺孔的方式，也可以是焊接的方式。
在一种可能的实现方式中，该引导件为四个滑动轴，该四个滑动轴平行且均匀地分布在该压板的四个角。
可选地，该引导件还可以是滑槽或滑轨。可以是侧板上有一个横梁，而压板上方两边各有一个向下的横梁，这两个横梁配合，使得压板正好可以沿着电池单体的厚度方向移动。
在一种可能的实现方式中，该电池模组还包括：电池测量单元BMU，用于将该压力传感装置监测的膨胀力的值传输给外部的电池管理系统BMS。
可选地，电池模组也可以不包括BMU，可以是多个电池模组中的压力传感装置监测的值直接传输给外部的BMS，BMS对于各个模组的状态进行管理。
在一种可能的实现方式中，该多个电池单体形状相同，该电池包还包括：电池包外壳，该电池包外壳包括底板、两个侧板和顶盖板，该电池模组固定于该底板上，该两个侧板用于使该电池模组排布整齐，该顶盖板用于封装该电池模组的顶部。
在一种可能的实现方式中，该电池模组还包括线路隔离板，该线路隔离板设置于该电池模组的顶部和该顶盖板之间，用于将该电池模组的连接线与该电池模组隔离。
使用线路隔离板能够减少线路磨损或其他损坏所带来的线路短路。
在一种可能的实现方式中，该电池包包括多个相同规格的该电池模组，该多个相同规格的该电池模组按照相同方式在底板上固定放置。
在一种可能的实现方式中，该两个端板、该两个侧板以及该底板之间采用铆接或焊接的方式链接。
在一种可能的实现方式中，电池单体的外壳为钢壳或铝壳。
在一种可能的实现方式中，该至少一个压力传感器中的每个压力传感器由电阻应变传 感器组成，或该每个压力传感器由电阻应变传感器、电子放大器、模数转换器和微处理器组成。
在一种可能的实现方式中，该电池包应用于电动汽车、基站储能、数据中心备电储能、不间断电源UPS或储能电站。
第二方面，提供了一种电池储能系统，该电池储能系统包括上述第一方面任一电池包和电池管理系统BMS；该至少一个电池包中的每个电池包中的压力传感装置分别用来监测所在电池包中的电池单体的厚度方向上的膨胀力；该BMS用于根据该每个电池包中的压力传感装置监测的膨胀力的变化，确定相应电池包所处的状态。
在一种可能的实现方式中，该电池储能系统应用于电动汽车中，该至少一个电池包中的第一电池包中的压力传感装置朝向该电动汽车的行驶方向。
第三方面，提供了一种电动汽车，包括上述第二方面的任一电池储能系统。
更多的方面和实施例将通过下面的详细描述加以呈现。
附图说明
图1是现有技术中具有压力监测功能的电池包。
图2是本申请实施例提供的电池包的示意性结构图。
图3是本申请实施例提供的电池包的另一示意性结构图。
图4是本申请实施例提供的压力传感装置的俯视图和主视图。
图5是本申请实施例提供的电池储能系统的示意性框图。
图6是本申请实施例提供的电池包的再一示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
近些年来，随着人们生活水平的提高及环境保护意识的的增强，人们都意识到能源是一个很值得关注的问题。出于能源和环境的考虑，电动汽车在各国政府和汽车制造商的推动下得到了快速的发展，其中，纯电动汽车以其能真正实现“零排放”而成为电动汽车的重要发展方向。锂离子电池凭借其优良的性能成为新一代电动汽车的理想动力源，它具有重量轻、储能大、功率大、无污染、也无二次污染、寿命长、自放电系数小、温度适应范围宽泛，是电动自行车、电动摩托车、电动小轿车、电动大货车等较为理想的车用蓄电池。
目前新能源车大部分采用锂离子电池作为能源储存装置，而锂离子电池作为储能装置仍然存在很多技术问题，例如：锂离子电池在使用过程中会由于相变、颗粒堆积模式、副反应产物堆积、产气等多种原因导致电池体积发生不同程度的膨胀。特别是电动车中锂离子电池成组排列使用，多个电池体积膨胀的累积会对模组中的固定装置产生应力，当应力累积过大时，会对模组固定装置产生破坏，带来失效与安全风险。例如，致锂离子电池自发产生起火、爆炸，会带来严重的安全问题。针对这些问题，目前常用监测手段与存在的问题:1)温度传感器监测，温度传导慢，不能为驾驶员逃生争取足够的时间。2)电压传感器，无法区分风险等级。电池电压异常既可能是信号传递、接线不良的小问题，也可能是电池爆炸等严重故障，无法区分。
电池作为电动汽车核心部件十分重要，但是它能承受的最大压力是有限的，当压力超 过一定数值是，会影响电池的充放电性能，当压力过大时，甚至会导致电池外壳破裂，电池热失控。因此，目前还有一种电池包，是在电池组外包装与电芯之间安装压力传感器，但这种电池包适用于软包装电池，只能监测电池鼓胀。具体如图1所示，包括：电池组外包装103，复数个单体电池1001串联或并联组成的电池组芯体101，以及至少一个压力传感器104。其中单体电池1001为软包电池，典型特征是采用铝塑膜作为包装的电池，电池组芯体101被外包装103捆绑或封装固定，该外包装103可以是多条捆绑带构成，或者采用壳体封装。压力传感器104设置在电池组芯体101与外包装体103之间，并且压力传感器104与电池组芯体与外包装体103间有一定作用力。假设当电池组正常情况下压力传感器104压力为F0。压力传感器104的信号输出端与电池组管理系统(Battery management system，BMS)102连接。
工作原理为：当电池组中任一电池发生鼓胀，会对外产生压力，压力会通过相邻电芯传导，由于软包电池的形变特性，电池组芯体会对各个方向均产生对外的压力。压力传感器介于103与101之间，可以检测到压力变化。并通过在压力传感器设置压力上限值F1，当检测压力大于F1时，压力传感器104对电池组输出信号，判断电池组鼓胀。
这种电池包主要解决软包壳体电池膨胀，因为软包壳体的外壳柔软，电池鼓胀受到挤压后，会向各个方向传递鼓胀力，无论压力传感器设置在什么部位，在电池鼓胀时不同位置的压力传感器监测到的值是相同的，因此，这种电池包只能监测电池组内电池鼓胀导致的压力上涨。换句话说，只能监测电池包内电池鼓胀与否，不能准确监测电池包结构件所在系统在某个方向上承受的具体压力。
本申请实施例正是基于在上述软包电池中监测压力中发现的问题提出的，在硬壳锂离子电池中监测压力。如图2所示，本申请实施例提供了一种电池包200，该电池包200包括：电池模组210和压力传感装置220，该电池模组210包括多个硬质电池单体和两个端板，该多个硬质电池单体采用叠层排布，该两个端板分别设置于该硬质电池单体的厚度方向的两个面，用于将该多个硬质电池单体以及设置于该两个端板之间的压力传感装置220压紧；该压力传感装置220包括第一压板221和设置于该第一压板221上面的至少一个压力传感器222，该第一压板221设置于该多个硬质电池单体中第一硬质电池单体211的上面，且完全覆盖该第一电池单体211的表面，即该第一压板221位于该第一硬质电池单体211与该至少一个压力传感器222之间。该第一压板221用于将该电池单体的厚度方向的膨胀力传递给该至少一个压力传感器222，该至少一个压力传感器222用于对该膨胀力进行监测。
应理解，该电池包可以应用于电动汽车、基站储能、数据中心备电储能、不间断电源(Uninterruptible Power System，UPS)或储能电站等锂离子电池储能系统中。为了描述方面，下面仅以应用于电动汽车中的电池包为例进行阐述。本申请实施例应不限于此。
具体地，相较于软包电池，硬质电池在使用周期上、安全性能上都有较高的优势，并且硬质电池防尘防水，不容易漏电。因此，在本申请实施例中，所采用的电池单体为硬质材料或电池单体的外壳采用硬质外壳，例如，钢壳或铝壳。而由硬质壳体电池组成的电池模组通常包括至少一个电池单体，如果是多个电池单体构成的电池模组，那么这多个电池单体可以是多个完全相同的电池单体，例如，规格大小相同，外壳材料相同等。也可以是外壳材料相同但规格大小不同等。或者还可以是规格大小相同但外壳材料不同，例如，一 部分是钢壳，而另一部分是铝壳等。通常，锂离子电池主要包括圆柱体电池和方形电池，而本申请实施例主要针对方形电池作出的改进。也就是说，电池单体的表面为方形。但本申请实施例并不限于此，例如，该电池单体的表面还可以是饼状等，只要可以进行叠层排布即可。该多个方形电池之间除了由模组外壳提供的机械力，也可以在电池单体之间用结构胶等辅助手段来增强模组机械强度。在该多个电池单体外侧还可以用两个端板，并且该两个端板上需要施加预紧力将该多个电池单体压紧。为了能测量每个电池模组中电池单体的膨胀力，可以在电池模组之间增加压力传感器，例如，可以在端板和电池单体之间放置压力传感器，可以在一侧放置压力传感器，也可以在两侧，也就是分别在两个端板与模组之间放置压力传感器，还可以是模组之间，也就是电池模组中某两个电池单体之间放置压力传感器。
应理解，在电池包处于正常情况下，也就是说电池模组中的电池不膨胀时，压力传感器被两个端板夹紧，且可以预设压力传感器监测的值为预设值F0，该F0也可以认为是为了使压力传感器不受重力影响固定于电池模组之间所施加的水平方向上力的值。
还应理解，在同一个平面上放置的压力传感器的数量可以不受限制，例如，假设压力传感器放置在端板与电池单体之间，可以在电池单体的四个角以及中心位置分别放置压力传感器，那么当电池模组中的电池单体膨胀时，可以综合该五个压力传感器上监测的值确定实际电池单体所受的力。只要将压力传感器均匀地分布在电池单体的表面，就能够较好的实现电池包的压力测量。
进一步地，为了降低该电池包的成本，可以减少该压力传感器的数量。可以在一个平面上放置一个压力传感器。而为了消除电池单体不规则膨胀的影响，可以采用压板来增大传递膨胀力的面积。如图2所示，该第一硬质电池单体(211)为该两个端板中第一端板(212)侧的第一个电池单体，该至少一个压力传感器(222)设置于该第一端板(212)和该第一压板(221)之间。
具体地，该压力传感装置可以设置在端板和电池单体之间。通常将压板与电池单体接触，并将压力传感器放置在压板与端板之间，该压板的面积可以大于该压力传感器的受力面积，进一步地，该压板的面积可以大于或等于电池单体表面的面积。换句话说，也就是说，压板的宽高都大于或等于电池单体正面的宽高。该压板还需要具有足够的刚度，其具体承受力与形变幅度需要根据模组重量以及预紧力进行设计。如图3所示，该压力传感装置可以设置在两个电池单体211和213之间，同样地，为了消除电池单体不规则膨胀的影响，可以采用压板221和223来增大传递膨胀力的面积。也就是说分别在两个电池单体上面固定两个压板，该两个压板之间放置压力传感器。
可选地，在本申请实施例中，该多个电池单体形状相同，该电池包200还包括：电池包外壳240，该电池包外壳240包括底板241、两个侧板242和顶盖板243，该电池模组210固定于该底板241上，该两个侧板242用于使该电池模组210排布整齐，该顶盖板243用于封装该电池模组210的顶部。
电池模组中至少有两个电池单体，电池单体间可以采用串联或并联联接，电池模组中的电池可以采用叠层排布，电池两侧可以放置侧板使电池排布整齐，并保证电池堆放方向的模组机械强度，电池底部放置底板起到支撑电池单体作用，并且电池底部上还可以安装有电池模组固定装置，使得至少一个电池模组固定在该底板上，电池模组的端板上施加预 紧力将电池压紧，并维持预紧力与侧板、底板联接，联接方式可采用铆接、焊接等方式。电池模组最上部是顶盖板，将模组连接线密封。
该电池包可以通过连接线等跟一些控制单元连接，这些连接线在一定时间后会出现磨损或其他的损坏，从而导致会出现线路短路，因此，进一步地，可以在电池模组的顶部与顶盖板之间放置一个线路隔离板216，用于将电池连接线与电池本体隔离。
可选地，在本申请实施例中，该电池包200还包括：引导件230，用于引导压板沿该电池单体的厚度方向上移动。
为了引导压板是沿着电池单体的厚度方向移动，可以使用滑动轴或者滑槽等的方式。具体地，可以在第一端板和第二端板之间固定设置多个滑动轴，而第一压板221和/或第二压板223上分别有与该多个滑动轴配合的圆孔，并且该圆孔与滑动轴之间的配合应该保证压板只能沿着电池单体的厚度方向上移动。应理解，该压板的面积应大于该电池单体的正面面积，例如，应至少保证压板的高度大于电池单体的高度，可以在压板的上方设置两个滑动轴，也可以保证压板的宽度大于电池单体的宽度，可以在压板的四个角设置四个滑动轴。进一步地，该四个滑动轴可以平行且均匀地分布在压板的四个角。还应理解，该滑动轴的数量应不受限制。另外，该滑动轴在第一端板和第二端板之间的固定方式也不受限制，可以是螺栓螺孔，或者是焊接的方式等。还可以在两边的侧板上设置滑槽或滑轨。例如，可以是侧板上有一个横梁，而压板上方两边各有一个向下的横梁，这两个横梁配合，使得压板正好可以沿着电池单体的厚度方向移动。
应理解，上述是以两种简单且比较容易实现的方式为例进行描述的，只要能实现引导压板沿电池单体的厚度方向移动的结构都在本申请保护范围之内。
可选地，该压力传感装置220可以是与电池模组一体化设计，也可以单独设计并且可以安装到电池模组中。例如，该压力传感装置220可以包括两个压板，第一压板221和第二压板223，4个滑动轴231以及至少一个压力传感器222。当该压力传感装置220布置在该第一端板212与该第一硬质电池单体211之间时，该第二压板223位于该第一端板212与该至少一个压力传感器222之间，当该压力传感装置220布置在该第一硬质电池单体211和该多个硬质电池单体中的第二硬质电池单体213之间时，该第二压板位于该第二硬质电池单体(213)与该至少一个压力传感器222之间。该第一压板221位于该第一硬质电池单体211与该至少一个压力传感器222之间。如图4上部所示的俯视图以及图4下部所示的主视图所示。可选地，该两个压板221和223的大小可以相同，并且压板用来消除电池单体不规则膨胀的影响，并将膨胀力传递给压力传感器，滑动轴231用于规范压板移动方向，压力传感器222将力学信号转换为电信号。压力传感器需要采用数字传感器，优选采用电阻应变式称重式传感器，可以由电阻应变传感器构成，或者还可以是由电阻应变传感器、电子放大器、模数转化器和微处理器构成，其中电阻应变传感器也可以采用电容式、光电式传感器等。其工作流程可以为：压板受电池与电池端板挤压，将模组内电池厚度方向的累加膨胀力传递给压力传感器，转变为电信号，在经过方法器放大，经过为处理器转化为压力数值的数字信号，传输给控制器。
可选地，该电池包200可以包括至少一个上述电池模组和相应的压力传感装置。该多个相同规格的电池模组210按照相同方式在底板241上固定放置。而在每个电池模组中可以都放置一个压力传感装置。
可选地，上述电池模组210中还可以包括一个电池测量单元(Battery measurement system，BMU)215，用于该电池模组中的压力传感装置220监测的膨胀力的值传输给外部的电池管理系统。
如图5所示，给出了本申请实施例的电池包的另一示意图。图中为了展示电池包内部结构，略去了电池包外壳，只展示了电池包底托板。图中4个模组同向放置，每个电池模组中有12个方形硬壳电池，模组包括两个端板。如图所示压力传感装置需要安放在每个模组的端板位置，每个模组包括至少1个压力传感装置，可选择均安装在前侧端板212或者后侧端板处，也可以两侧同时安装。
本申请实施例还提供了一种电池储能系统300，该电池储能系统300包括至少一个上述电池包200和BMS 310；该至少一个电池包中的每个电池包200中的压力传感装置220分别用来监测所在电池包中的电池单体的厚度方向上的膨胀力；该BMS 310用于根据该每个电池包中的压力传感装置监测的膨胀力的变化，确定相应电池包所处的状态。
具体地，该电池储能系统300的工作框图如图6所示。其中，某个电池包中有4个模组210，压力传感装置220、电池包外壳240、BMU 215，此外还示意给出了与每个模组的BMU连接的BMS 310以及继电器系统400，同样示出了与BMS相配合的热管理系统500、微控制单元600(microcontroller unit,MCU)、车辆控制单元700(Vehicle Control Unit，VCU)、车机报警800连接。电池模组由12个方形电池，以相同方式叠层放置固定，并在一侧端板放置压力传感装置，每个模组布置一个电池测试单元BMU，电池正负极、压力传感装置与BMU连接，BMU将监测到的信号传递给BMS，BMS进行计算和判断，并给将控制或预警信号传递给继电器系统、热管理系统、MCU、VCU、车机。
可选地，在本申请实施例中，该电池储能系统300可应用于电动汽车中，该至少一个电池包中的第一电池包200中的压力传感装置220朝向该电动汽车的行驶方向。
一个具体的实施例中，该电池储能系统中的电池包对应于上述实施例中的电池包200，该电池储能系统中的压力传感装置对应于上述实施例中的压力传感装置220。
应理解，该电池储能系统中所包括的电池包的结构与上述实施例提及的结构类似，为了简洁，在此不再赘述。
还应理解，该电池储能系统还可以应用于上述基站储能、数据中心备电储能、不间断电源UPS或储能电站中，本申请实施例并不限于此。
可选地，该电池储能系统300应用于电动汽车中，所述至少一个电池包中的第一电池包200中的压力传感装置220朝向所述电动汽车的行驶方向。
本申请实施例还提供了一种电动汽车1000，该电动汽车可以包括上述任一电池储能系统。
应理解，本申请实施例的电动汽车1000中的电池储能系统对应于上述电池储能系统300，其内部结构与上述电池包200的结构类似，为了简洁，在此不再赘述。
本申请类似结构装置还可以用于监控储能系统的电池膨胀与失效情况。对于数码产品电池，针对软包装电池，电池失效、爆炸往往伴随着电池膨胀，为诸如手机、平板电脑、笔记本电脑的电池安装类似系统，可以预防电池膨胀导致的产品破坏，并降低电池发生爆炸、燃烧等问题的概率。
为了便于本申请的理解，图中示出的本申请的实施例仅是示意性说明。一些改进是可 能的，并不脱离本申请的范围。
虽然本申请优选的实施例已经在此处描述，应理解，所用的术语的目的是具有描述性而非限制性词语的本质。对于本领域技术人员显然的是，根据上述教导，可以得出本申请的许多改型和变体。因此，应理解，在权利要求书的范围内，其中附图标记仅为方便而使用，并非以任何方式进行限制，本申请可以采用除上面具体描述之外的其他方式实施。

Claims (18)

  1. 一种电池包(200)，其特征在于，所述电池包(200)包括：电池模组(210)和压力传感装置(220)，
    所述电池模组(210)包括多个硬质电池单体和两个端板，所述多个硬质电池单体采用叠层排布，所述两个端板分别沿所述硬质电池单体的厚度方向设置，用于将所述多个硬质电池单体以及设置于所述两个端板之间的压力传感装置(220)压紧；
    所述压力传感装置(220)包括第一压板(221)和设置于所述第一压板(221)上面的至少一个压力传感器(222)，所述第一压板(221)设置于所述多个硬质电池单体中第一硬质电池单体(211)的上面，且完全覆盖所述第一硬质电池单体(211)的表面，所述第一压板(221)用于将所述硬质电池单体的厚度方向的膨胀力传递给所述至少一个压力传感器(222)，所述至少一个压力传感器(222)用于对所述膨胀力进行监测。
  2. 根据权利要求1所述的电池包(200)，其特征在于，所述第一硬质电池单体(211)为所述两个端板中第一端板(212)侧的第一个电池单体，所述至少一个压力传感器(222)设置于所述第一端板(212)和所述第一压板(221)之间。
  3. 根据权利要求1或2所述的电池包(200)，其特征在于，所述压力传感装置(220)还包括第二压板(223)，当所述压力传感装置(220)布置在所述第一端板(212)与所述第一硬质电池单体(211)之间时，所述第二压板(223)位于所述第一端板(212)与所述至少一个压力传感器(222)之间，当所述压力传感装置(220)布置在所述第一硬质电池单体(211)和所述多个硬质电池单体中的第二硬质电池单体(213)之间时，所述第二压板位于所述第二硬质电池单体(213)与所述至少一个压力传感器(222)之间，所述第一压板(221)位于所述第一硬质电池单体(211)与所述至少一个压力传感器(222)之间。
  4. 根据权利要求3所述的电池包，其特征在于，所述第二压板(223)的大小与所述第一压板(221)的大小相同。
  5. 根据权利要求1至4中任一项所述的电池包(200)，其特征在于，所述电池包(200)还包括：
    引导件(230)，用于引导压板沿所述硬质电池单体的厚度方向上移动。
  6. 根据权利要求5所述的电池包(200)，其特征在于，所述引导件(230)为多个滑动轴，所述多个滑动轴固定于所述第一端板(212)和所述两个端板的第二端板(214)之间，且所述多个滑动轴贯穿所述压板。
  7. 根据权利要求6所述的电池包(200)，其特征在于，所述引导件(230)为四个滑动轴，所述四个滑动轴平行且均匀地分布在所述压板的四个角。
  8. 根据权利要求1至7任一项所述的电池包(200)，其特征在于，所述电池模组(210)还包括：
    电池测量单元BMU(215)，用于将所述压力传感装置(220)监测的膨胀力的值传输给外部的电池管理系统BMS。
  9. 根据权利要求1至8中任一项所述的电池包(200)，其特征在于，所述多个硬质电池单体形状相同，所述电池包(200)还包括：
    电池包外壳(240)，所述电池包外壳(240)包括底板(241)、两个侧板(242)和顶盖板(243)，所述电池模组(210)固定于所述底板(241)上，所述两个侧板(242)用于使所述电池模组(210)排布整齐，所述顶盖板(243)用于封装所述电池模组(210)的顶部。
  10. 根据权利要求9所述的电池包(200)，其特征在于，所述电池模组(210)还包括线路隔离板(216)，所述线路隔离板(216)设置于所述电池模组(210)的顶部和所述顶盖板(243)之间，用于将所述电池模组(210)的连接线与所述电池模组(210)隔离。
  11. 根据权利要求1至10中任一项所述的电池包(200)，其特征在于，所述电池包(200)包括多个相同规格的所述电池模组(210)，所述多个相同规格的所述电池模组(210)按照相同方式在底板(241)上固定放置。
  12. 根据权利要求9或10所述的电池包(200)，其特征在于，所述两个端板、所述两个侧板(242)以及所述底板(241)之间采用铆接或焊接的方式链接。
  13. 根据权利要求1至12中任一项所述的电池包(200)，其特征在于，所述硬质电池单体的外壳为钢壳或铝壳。
  14. 根据权利要求1至13中任一项所述的电池包(200)，其特征在于，所述至少一个压力传感器(222)中的每个压力传感器由电阻应变传感器组成，或所述每个压力传感器由电阻应变传感器、电子放大器、模数转换器和微处理器组成。
  15. 根据权利要求1至14中任一项所述的电池包(200)，其特征在于，所述电池包(200)应用于电动汽车、基站储能、数据中心备电储能、不间断电源UPS或储能电站中。
  16. 一种电池储能系统(300)，其特征在于，所述电池储能系统(300)包括至少一个如权利要求1至15中任一项所述的电池包和电池管理系统BMS(310)；
    所述至少一个电池包中的每个电池包(200)中的压力传感装置(220)分别用来监测所在电池包中的硬质电池单体的厚度方向上的膨胀力；所述BMS(310)用于根据所述每个电池包中的压力传感装置监测的膨胀力的变化，确定相应电池包所处的状态。
  17. 根据权利要求16所述的电池储能系统(300)，其特征在于，所述电池储能系统(300)应用于电动汽车中，所述至少一个电池包中的第一电池包(200)中的压力传感装置(220)朝向所述电动汽车的行驶方向。
  18. 一种电动汽车(400)，其特征在于，所述电动汽车(400)包括如权利要求16或17所述的电池储能系统。
PCT/CN2017/115812 2017-05-09 2017-12-13 电池包、电池储能系统和电动汽车 WO2018205598A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17909601.1A EP3621128A4 (en) 2017-05-09 2017-12-13 BATTERY PACK, BATTERY ENERGY STORAGE SYSTEM AND ELECTRIC VEHICLE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710320508.3A CN108878698B (zh) 2017-05-09 2017-05-09 电池包、电池储能系统和电动汽车
CN201710320508.3 2017-05-09

Publications (1)

Publication Number Publication Date
WO2018205598A1 true WO2018205598A1 (zh) 2018-11-15

Family

ID=64105686

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/115812 WO2018205598A1 (zh) 2017-05-09 2017-12-13 电池包、电池储能系统和电动汽车

Country Status (3)

Country Link
EP (1) EP3621128A4 (zh)
CN (1) CN108878698B (zh)
WO (1) WO2018205598A1 (zh)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109367658A (zh) * 2018-12-13 2019-02-22 湖南丽杰车业有限公司 一种电池防盗型电动三轮车
CN111537126A (zh) * 2020-04-28 2020-08-14 苏州清陶新能源科技有限公司 用于确定软包电池预紧力的工装、确定软包电池预紧力和模组装配的方法
CN113161675A (zh) * 2021-03-09 2021-07-23 浙江零跑科技有限公司 一种电池模组
WO2021220307A1 (en) * 2020-04-29 2021-11-04 Hero MotoCorp Limited Energy storage system
CN113632301A (zh) * 2020-05-18 2021-11-09 东莞新能安科技有限公司 电池箱体、电池组及电池箱
CN114440754A (zh) * 2021-08-23 2022-05-06 北京卫蓝新能源科技有限公司 一种可测试多个电池在不同压力下膨胀量的装置及方法
CN114556667A (zh) * 2020-03-20 2022-05-27 株式会社Lg新能源 电池膨胀测试设备
CN114664165A (zh) * 2022-03-25 2022-06-24 北京智扬北方国际教育科技有限公司 一种新能源汽车热管理展示系统

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN210403797U (zh) * 2019-01-09 2020-04-24 比亚迪股份有限公司 单体电池、动力电池包及电动车
CN111834676B (zh) * 2019-04-18 2021-12-24 荣盛盟固利新能源科技股份有限公司 一种压力可控的软包电池模组
CN110739420A (zh) * 2019-09-12 2020-01-31 深圳市科陆电子科技股份有限公司 一种电池模组、及其热失控检测系统和检测方法
CN112310556B (zh) * 2019-09-29 2022-01-18 宁德时代新能源科技股份有限公司 电池模组的隔离构件及其组装方法、电池模组、电池包、车辆及电池膨胀监测方法
CN110962628B (zh) * 2019-12-18 2023-12-22 郑州商业技师学院 一种电动汽车电池安装装置
CN113054271A (zh) * 2019-12-27 2021-06-29 北京车和家信息技术有限公司 检测电池安全状态的方法及装置
CN113644369A (zh) * 2020-04-26 2021-11-12 比亚迪股份有限公司 电池包和电动汽车
DE102020118542B3 (de) 2020-07-14 2022-01-05 Audi Aktiengesellschaft Batteriemodul sowie Kraftfahrzeug mit einer Antriebsbatterie und Verfahren zum Herstellen eines Batteriemoduls
CN112018461A (zh) * 2020-08-21 2020-12-01 常州瑞德丰精密技术有限公司 电池包、电动车及储能装置
CN112133854B (zh) * 2020-08-28 2023-04-18 北京汽车股份有限公司 动力电池的电池模组、故障检测方法、动力电池以及车辆
AT524291B1 (de) * 2020-10-01 2022-10-15 Avl List Gmbh Vorrichtung zum testen zumindest einer batteriezelle
CN112380644A (zh) * 2020-11-02 2021-02-19 东软睿驰汽车技术（沈阳）有限公司 电池包壳体强度的检验方法和装置
JP2024505848A (ja) * 2021-01-21 2024-02-08 東莞新能安科技有限公司 電池パック、電池パックを製造する方法及び電気使用装置
EP4056402A1 (en) * 2021-03-10 2022-09-14 Volvo Truck Corporation A safety system for detecting a critical condition in a battery pack
CN113486285A (zh) * 2021-06-01 2021-10-08 北京海博思创科技股份有限公司 电池模组膨胀力的预估方法及装置
CN113745674B (zh) * 2021-09-03 2024-05-28 山东希格斯新能源有限责任公司 一种储能电站电池包并联管理系统
DE102022107491A1 (de) 2022-03-30 2023-10-05 Bayerische Motoren Werke Aktiengesellschaft Zellmodul mit einer Messeinrichtung zur Erkennung einer Verformung und Beschädigung eines Zellmodulrahmens
CN117013120A (zh) * 2022-04-29 2023-11-07 华为技术有限公司 电池模组、电池包和用电装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009238606A (ja) * 2008-03-27 2009-10-15 Denso Corp 電池スタックの拘束手段、電池機器モジュール及び電池パック
CN204255553U (zh) * 2014-12-08 2015-04-08 宁德新能源科技有限公司 电池模组的电池膨胀力测试装置
CN205051384U (zh) * 2015-09-25 2016-02-24 东莞新能德科技有限公司 电池管理电路
KR20160064871A (ko) * 2014-11-28 2016-06-08 주식회사 엘지화학 배터릭 팩
CN206098498U (zh) * 2016-09-14 2017-04-12 广东精进能源有限公司 一种安全电池模块的汽车动力电池箱

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130040575A (ko) * 2011-10-14 2013-04-24 삼성에스디아이 주식회사 배터리의 고장 검출 장치 및 방법
CN102569930A (zh) * 2011-12-22 2012-07-11 南京双登科技发展研究院有限公司 一种电池的压力检测装置及其检测方法
CN103474710A (zh) * 2012-06-07 2013-12-25 深圳市海盈科技有限公司 锂离子电池组及锂离子电池组性能监测办法
WO2014100937A1 (en) * 2012-12-24 2014-07-03 Schneider Electric It Corporation Method for monitoring battery gas pressure and adjusting charging parameters
US20150037662A1 (en) * 2013-07-30 2015-02-05 Johnson Controls Technology Company System and method for sealing a battery cell
CN204651430U (zh) * 2015-06-02 2015-09-16 北京普莱德新能源电池科技有限公司 电池模组电压采集组件及具有该电压采集组件的电池模组
CN105304843A (zh) * 2015-11-23 2016-02-03 曾凯涛 一种防爆锂电池箱
CN205609622U (zh) * 2016-04-12 2016-09-28 宁德时代新能源科技股份有限公司 电池模组
CN206003869U (zh) * 2016-09-22 2017-03-08 宁德时代新能源科技股份有限公司 电池模组及电池包

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009238606A (ja) * 2008-03-27 2009-10-15 Denso Corp 電池スタックの拘束手段、電池機器モジュール及び電池パック
KR20160064871A (ko) * 2014-11-28 2016-06-08 주식회사 엘지화학 배터릭 팩
CN204255553U (zh) * 2014-12-08 2015-04-08 宁德新能源科技有限公司 电池模组的电池膨胀力测试装置
CN205051384U (zh) * 2015-09-25 2016-02-24 东莞新能德科技有限公司 电池管理电路
CN206098498U (zh) * 2016-09-14 2017-04-12 广东精进能源有限公司 一种安全电池模块的汽车动力电池箱

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3621128A4

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109367658A (zh) * 2018-12-13 2019-02-22 湖南丽杰车业有限公司 一种电池防盗型电动三轮车
CN114556667A (zh) * 2020-03-20 2022-05-27 株式会社Lg新能源 电池膨胀测试设备
CN114556667B (zh) * 2020-03-20 2024-02-13 株式会社Lg新能源 电池膨胀检查设备
CN111537126B (zh) * 2020-04-28 2022-12-13 苏州清陶新能源科技有限公司 用于确定软包电池预紧力的工装、确定软包电池预紧力和模组装配的方法
CN111537126A (zh) * 2020-04-28 2020-08-14 苏州清陶新能源科技有限公司 用于确定软包电池预紧力的工装、确定软包电池预紧力和模组装配的方法
WO2021220307A1 (en) * 2020-04-29 2021-11-04 Hero MotoCorp Limited Energy storage system
CN113632301A (zh) * 2020-05-18 2021-11-09 东莞新能安科技有限公司 电池箱体、电池组及电池箱
CN113632301B (zh) * 2020-05-18 2023-07-04 东莞新能安科技有限公司 电池箱体、电池组及电池箱
CN113161675B (zh) * 2021-03-09 2022-06-21 浙江零跑科技股份有限公司 一种电池模组
CN113161675A (zh) * 2021-03-09 2021-07-23 浙江零跑科技有限公司 一种电池模组
CN114440754A (zh) * 2021-08-23 2022-05-06 北京卫蓝新能源科技有限公司 一种可测试多个电池在不同压力下膨胀量的装置及方法
CN114440754B (zh) * 2021-08-23 2024-04-05 北京卫蓝新能源科技有限公司 一种可测试多个电池在不同压力下膨胀量的装置及方法
CN114664165A (zh) * 2022-03-25 2022-06-24 北京智扬北方国际教育科技有限公司 一种新能源汽车热管理展示系统
CN114664165B (zh) * 2022-03-25 2023-07-28 北京智扬北方国际教育科技有限公司 一种新能源汽车热管理展示系统

Also Published As

Publication number Publication date
CN108878698B (zh) 2021-08-13
EP3621128A4 (en) 2020-05-27
CN108878698A (zh) 2018-11-23
EP3621128A1 (en) 2020-03-11

Similar Documents

Publication Publication Date Title
WO2018205598A1 (zh) 电池包、电池储能系统和电动汽车
JP5489797B2 (ja) 電池システム
JP5952418B2 (ja) 安全性の向上した電池パック
WO2013111960A1 (ko) 안전성이 향상된 전지모듈 및 이를 포함하는 전지팩
WO2013015524A1 (ko) 안전성이 향상된 전지팩
CN102823020B (zh) 具有能预定的数量的并联和/或串联电池单体的单体组
KR20120080315A (ko) 배터리 팩 관리 장치 및 방법
WO2009157676A2 (ko) 안전성이 향상된 중대형 전지팩
JP2012074198A (ja) 電源装置
KR101262029B1 (ko) 안전성이 향상된 전지팩
US11205809B2 (en) Early detection of thermal incident in battery pack
CN206194914U (zh) 一种用于电池的安全测试装置
WO2015174714A1 (ko) 스페이서를 포함하는 전지팩
CN103474710A (zh) 锂离子电池组及锂离子电池组性能监测办法
KR20120023369A (ko) 이차전지 폭발방지장치
CN216958412U (zh) 电池模组、电池箱以及车辆
US20130252051A1 (en) Battery system
US20240106016A1 (en) Battery cell, battery module, battery pack, energy storage system, and electric vehicle
CN106450098B (zh) 一种高能量密度易维护电池箱结构
CN105280859A (zh) 电动汽车电池系统碰撞防护结构及其装配方法和拆卸方法
CN213579473U (zh) 一种计算电池未来潜在的爆炸危险的组合式传感器
WO2023207819A1 (zh) 电池模组、电池包和用电装置
CN210487470U (zh) 软包电芯膨胀力测试装置
CN216645664U (zh) 电子设备、电池模组及其膨胀力的测试系统、结构
CN216145671U (zh) 一种电池包鼓包探测装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17909601

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2017909601

Country of ref document: EP

Effective date: 20191209