WO2023130596A1 - 一种电池模组及用电装置 - Google Patents

一种电池模组及用电装置 Download PDF

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Publication number
WO2023130596A1
WO2023130596A1 PCT/CN2022/085117 CN2022085117W WO2023130596A1 WO 2023130596 A1 WO2023130596 A1 WO 2023130596A1 CN 2022085117 W CN2022085117 W CN 2022085117W WO 2023130596 A1 WO2023130596 A1 WO 2023130596A1
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WIPO (PCT)
Prior art keywords
battery
battery cell
along
present application
battery module
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Application number
PCT/CN2022/085117
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English (en)
French (fr)
Inventor
方郑宇
秦峰
何润泳
王志
计泓冶
Original Assignee
宁德时代新能源科技股份有限公司
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Publication of WO2023130596A1 publication Critical patent/WO2023130596A1/zh

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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
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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

Definitions

  • the present application relates to the technical field of electrochemical devices, in particular to a battery module and an electrical device.
  • the application provides a battery module and an electrical device to reduce the probability of thermal failure of the battery caused by excessive swelling of the battery, improve the safety performance of the battery, and reduce potential safety hazards.
  • the specific technical scheme is as follows:
  • the first aspect of the present application provides a battery module, including a battery, a wire harness isolation plate and at least one fixing belt.
  • the battery includes at least one battery cell; the wire harness isolation plate is electrically connected to at least one battery cell; at least one fixing band is arranged on the wire harness isolation plate, and at least one fixing band extends along the first direction, and the two ends of the at least one fixing band are respectively It is fixedly connected with both sides of the battery along the first direction, and the first direction is the thickness direction of at least one battery cell.
  • a fixing belt is provided on the wiring harness isolation plate, and both ends of the fixing belt are fixedly connected to both sides of the battery along the first direction.
  • the fixing belt can provide the battery with a constraint force along the first direction, that is, provide a plurality of battery cells included in the battery with a constraint force along the first direction, that is, constrain the plurality of battery cells along the first direction. Two large sides. Therefore, when the battery cell bulges, the fixing belt can restrain the two large surfaces of the battery cell with a large degree of bulge, and reduce the displacement of multiple battery cells along the first direction caused by phenomena such as bulge.
  • the battery includes an end plate, the end plate is disposed on at least one side of at least one battery cell along the first direction, and at least one fixing band is fixedly connected to the end plate.
  • the fixing strap can provide the battery with restraint in the first direction.
  • a side of at least one fixing belt close to at least one battery cell has a protruding structure.
  • the protruding structure can provide a downward pressing force to at least one battery cell when the battery cell bulges and the fixing belt is tensioned in the first direction, thereby enhancing the binding force of the fixing belt on the battery.
  • At least one battery cell has a pole structure on a side close to at least one fixing band, and along a direction perpendicular to the wire harness separator, the projection of the protruding structure does not overlap with the projection of the pole structure.
  • the projection of the raised structure does not overlap with the projection of the pole structure, which can reduce the impact of the raised structure on the structure of the battery pole and reduce the impact on the electrical connection performance of the battery cell.
  • At least one battery cell has an explosion-proof valve on a side close to at least one fixing band, and along a direction perpendicular to the wire harness isolation plate, projections of the raised structure and projections of the explosion-proof valve do not overlap.
  • the projection of the raised structure does not overlap with the projection of the explosion-proof valve, which can reduce the impact of the raised structure on the explosion-proof valve of the battery cell, and reduce the impact on the explosion-proof, breathable and pressure relief performance of the battery cell.
  • the protruding structure abuts against a side of the battery cell close to at least one fixing band.
  • the battery cells When the battery cells are bulging, it can reduce the impact of the displacement between the battery cells on the stress exerted by the bars on the wire harness isolation plate that are electrically connected to the pole structure, and reduce the impact of the bars on the battery cells due to the displacement of the battery cells.
  • the probability of battery failure due to excessive stress can be reduced, and the electrical connection performance of the battery can be improved.
  • At least one fixing belt is integrally injected with the wire harness isolation plate.
  • the integral injection molding structure can increase the fastness of the connection between the at least one fixing belt and the wire harness isolation plate, enhance the binding force of the at least one fixing belt on the battery along the first direction, and further improve the safety performance of the battery.
  • the material of at least one fixing strap includes metal.
  • the metal has good mechanical properties such as strength, hardness and rigidity, which can enhance the use effect of at least one fixing band, thereby improving the safety performance of the battery.
  • the battery includes at least two battery cells arranged side by side along a second direction, and the second direction is perpendicular to the first direction; Between the pole structures of the battery cells. Arranging at least one fixing band between the pole structures of two adjacent battery cells can not only reduce the influence of at least one fixing band on the pole structure, but also improve the binding force of at least one fixing band to the battery, reducing the The probability of excessive swelling of the battery cells in the battery further improves the safety performance of the battery.
  • the second aspect of the present application provides an electric device, including any one of the battery modules described above, and the battery in the battery module is used to provide electric energy to the electric device.
  • FIG. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application.
  • Fig. 2 is a schematic diagram of an exploded structure of a battery according to some embodiments of the present application.
  • FIG. 3 is a schematic structural diagram of a battery according to some embodiments of the present application.
  • Fig. 4 is a schematic structural diagram of a wire harness isolation board according to some embodiments of the present application.
  • FIG. 5 is a partial cross-sectional view of a battery according to some embodiments of the present application.
  • Fig. 6 is a partial cross-sectional view of a battery according to some embodiments of the present application.
  • FIG. 7 is an enlarged view of area A in FIG. 4 .
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.
  • the battery cells inside the battery are prone to bulge.
  • the positive electrode active material and negative electrode active material intercalate or de-ion during the charge and discharge cycle of the battery, the battery cell will bulge due to the accumulation thickness of the side reaction of the battery monomer system and the peeling off of the graphite sheet.
  • the battery cell is an important part of the battery, and the swelling of the battery cell has an adverse effect on the performance and service life of the battery.
  • the battery cells are stacked to form a battery module, the large surfaces of adjacent battery cells are placed close to each other. When the battery cells in the battery module bulge excessively, it will cause battery failure or even explosion, which will affect the safety performance of the battery.
  • the inventor designed a battery.
  • at least one fixing band in the battery By setting at least one fixing band in the battery and connecting at least one fixing band to the battery module, when the battery cells bulge and other phenomena, the battery in the battery module will be damaged.
  • at least one fixing belt can restrain the battery module, reducing the probability of safety problems such as battery explosion due to excessive swelling, and improving the safety performance of the battery.
  • the batteries disclosed in the embodiments of the present application can be used, but not limited to, in electric devices such as vehicles, ships or aircrafts.
  • the battery disclosed in this application can be used to form the power supply system of the electrical device, which is beneficial to reduce the probability of safety problems such as battery explosion due to excessive swelling and improve the safety performance of the battery.
  • An embodiment of the present application provides an electric device that uses a battery as a power source.
  • the electric device can be a mobile phone, a portable device, a notebook computer, a battery car, an electric vehicle, a ship, a spacecraft, an electric toy, an electric tool, etc., for example, a spacecraft Including airplanes, rockets, space shuttles and spaceships, etc.
  • Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.
  • Electric tools include metal cutting electric toys Tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.
  • a vehicle is used as an example to describe an electric device according to an embodiment of the present application.
  • the batteries described in the embodiments of the present application are not limited to be applicable to the electric devices described above, but can also be applied to all devices using batteries. However, for the sake of brevity, the following embodiments take electric vehicles as examples for illustration.
  • the vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
  • a battery 2 , a controller 3 and a motor 4 can be arranged inside the vehicle 1 , and the controller 3 is used to control the power supply of the battery 2 to the motor 4 .
  • the battery 2 may be provided at the bottom or front or rear of the vehicle 1 .
  • the battery 2 can be used for power supply of the vehicle 1 , for example, the battery 2 can be used as an operating power source of the vehicle 1 , used for the circuit system of the vehicle 1 , for example, used for starting, navigating and working power requirements of the vehicle 1 .
  • the battery 2 can not only be used as an operating power source for the vehicle 1 , but can also be used as a driving power source for the vehicle 1 , replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1 .
  • the battery module includes a battery 2 , a wire harness isolation plate 8 and at least one fixing belt 810 .
  • the battery 2 includes at least one battery cell 6; the wire harness isolation plate 8 is electrically connected to at least one battery cell 6; at least one fixing band 810 is arranged on the wire harness isolation plate 8, and at least one fixing band 810 extends along the first direction X, Two ends of at least one fixing strap 810 are fixedly connected to both sides of the battery 2 along a first direction X, which is the thickness direction of at least one battery cell 6 .
  • the battery 2 may be a modular structure formed by connecting one or more battery cells 6 .
  • the battery 2 may include a plurality of battery cells 6 stacked along the thickness direction of the battery cells 6 .
  • the plurality of battery cells 6 may be connected in series, in parallel or in parallel, and the mixed connection means that the plurality of battery cells 6 are both in series and in parallel.
  • the battery cell 6 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 6 may be in the form of a cylinder, a flat body, a cuboid or other shapes. As shown in FIG. 3 , the battery cell 6 includes a pole structure 610 , and the pole structure 610 is a conductive member capable of leading out positive and negative electrodes in the battery cell 6 .
  • a bar 820 , an output pole bar and a flexible circuit board 830 may also be provided on the wire harness isolation board 8 .
  • the bar piece 820 is electrically connected to the pole structure 610 on the battery cell 6.
  • the wiring harness isolation plate 8 can also be used for installing and fixing the battery sampling line, wherein the battery sampling line is a wire for collecting electrical signals such as current and voltage of each battery cell 6 .
  • the wire harness isolation plate 8 can also be used for air conduction and exhaust of the battery 2 .
  • the first direction X is the thickness direction of the battery cells 6 , that is, the stacking direction when a plurality of battery cells 6 are stacked.
  • the fixing strip 810 is disposed on the wire harness isolation board 8 , and the fixing strip 810 extends along the first direction X. As shown in FIG. As shown in FIG. 5 , both ends of the fixing band 810 are bent toward the battery 2 and fixedly connected to both sides of the battery 2 . Therefore, the fixing belt 810 can restrain the two sides of the battery 2 and reduce the probability of excessive swelling.
  • components such as the fixing belt 810 , the tab 820 , the output pole tab and the flexible circuit board 830 can be connected and fixed to the wire harness isolation plate 8 through a heat riveting process.
  • a fixing belt 810 is provided on the wiring harness isolation plate 8 and both ends of the fixing belt 810 are fixedly connected to both sides of the battery 2 along the first direction X.
  • the fixing belt 810 can provide the battery 2 with a constraint force along the first direction X, that is, provide the battery 2 with a constraint force along the first direction X for the multiple battery cells 6 included in the battery 2, that is, constrain the multiple battery cells 6 Two large faces along the first direction X. Therefore, the fixing belt 810 can constrain the two large surfaces of the battery cells 6 that are swelled to a greater degree when the battery cells 6 bulge, reducing the number of battery cells 6 caused by swelling and other phenomena along the first direction.
  • the displacement generated on X reduces the probability of excessive swelling of the battery cell 6, thereby reducing the probability of excessive swelling of the battery 2, thereby improving the safety performance of the battery 2, and reducing the risk of battery 2 due to excessive swelling of the battery cell 6.
  • the probability of thermal failure occurs, reducing safety hazards.
  • the fixing belt 810 restricts excessive swelling of the battery cells 6 in the battery 2 along the thickness direction
  • the main swelling force generation direction of the battery cells 6 will be changed from the thickness direction of the battery cells 6 to the direction of the battery cells 6. height direction.
  • the top cover of the battery cell 6 can be provided with an explosion-proof vent valve, so the high-pressure gas generated in the battery cell 6 can be discharged more through the explosion-proof vent valve, so as to realize the ventilation and pressure relief of the battery 2, and further reduce the pressure of the battery 2.
  • the degree of swelling improves the safety performance of the battery 2 .
  • the wire harness isolation plate 8 covers the upper end of the battery 2 and is fixedly connected with the fixing belt 810, which not only can increase the fastness of the connection between the fixing belt 810 and the battery 2, but also has a certain degree of air conduction, exhaust, etc. function, so that the probability of excessive swelling of the battery cell 6 can be reduced, and the safety performance of the battery 2 can be further improved.
  • the battery 2 may further include a battery case 5 , and a plurality of battery cells 6 are accommodated in the battery case 5 .
  • the battery case 5 is used to provide an accommodation space for the battery cell 6 or a battery module composed of a plurality of battery cells 6 .
  • a plurality of battery cells 6 can be directly connected in series, in parallel or mixed together, and then placed in the battery case 5 .
  • a plurality of battery cells 6 can also be connected in series, parallel or mixed to form one or more battery modules, and then the battery modules are accommodated in the case 5 together.
  • the battery case 5 can adopt various structures.
  • the battery case 5 may include a first part 51 and a second part 52, the first part 51 and the second part 52 cover each other, and the first part 51 and the second part 52 jointly define a The accommodating space of the battery cell 6 .
  • the first part 51 can be a hollow structure with one end open
  • the second part 52 can be a plate-shaped structure
  • the second part 52 covers the opening side of the first part 51, so that the first part 51 and the second part 52 jointly define an accommodation space .
  • the first part 51 and the second part 52 can also be hollow structures with one side open, and the open side of the second part 52 covers the open side of the first part 51 .
  • the battery case 5 formed by the first part 51 and the second part 52 can be in various shapes, such as a cylinder, a cuboid and the like.
  • the battery 2 may also include other structures, such as current flow components, etc., which are not limited in this application.
  • the battery 2 includes an end plate 710, the end plate 710 is arranged on at least one side of at least one battery cell 6 along the first direction X, and at least one of the battery cells 6 is fixed
  • the strap 810 is fixedly connected to the end plate 710 .
  • the end plate 710 is a structural member disposed on one or both sides of the battery 2 along the first direction X to fix the battery cells 6 in the battery 2 .
  • the battery 2 may include two end plates 710, which are arranged opposite to each other, respectively contacting the sides of at least one battery cell 6 along the first direction X, so as to fix at least one One battery cell 6 reduces the probability that at least one battery cell 6 moves in the battery case 5 and affects the performance and safety of the battery 2 .
  • FIG. 3 the end plate 710 is a structural member disposed on one or both sides of the battery 2 along the first direction X to fix the battery cells 6 in the battery 2 .
  • the battery 2 may include two end plates 710, which are arranged opposite to each other, respectively contacting the sides of at least one battery cell 6 along the first direction X, so as to fix at least one One battery cell 6 reduces the probability that at least one battery cell 6 moves in the battery case 5 and affects the performance and safety of the battery 2 .
  • both ends of at least one fixing band 810 can be fixedly connected to the two end plates 710 so as to be fixedly connected to both sides of the battery 2 through the end plates 710 .
  • the connection method between the end plate 710 and the two ends of the fixing belt 810 includes locking connection. Specifically, the end plate 710 is provided with threaded holes, and the end plate 710 is locked and connected with at least one fixing belt 810 through bolts, and the connection fastness is relatively high.
  • the connection manner between the end plate 710 and the two ends of the fixing belt 810 also includes buckle connection, etc., which is not limited in this application.
  • the two ends of at least one fixing band 810 are fixedly connected to the end plates 710 on both sides of the battery 2 along the first direction X, which can provide the battery 2 with binding force on.
  • the fixing belt 810 can constrain the two large surfaces of the battery cells 6 that are bulging to a greater extent when the battery cells 6 are bulging, and reduce the movement of multiple battery cells 6 along the first direction X caused by bulging and other phenomena.
  • the generated displacement reduces the probability of excessive swelling of the battery cell 6, thereby reducing the probability of excessive swelling of the battery 2, thereby improving the safety performance of the battery 2, and reducing the heat generated by the battery 2 due to the excessive swelling of the battery cell 6. The probability of failure and reduce potential safety hazards.
  • At least one fixing strap 810 has a protruding structure 8110 on a side close to at least one battery cell 6 .
  • the protruding structure 8110 is disposed on a side of at least one fixing belt 810 close to at least one battery cell 6 .
  • the protrusion structure 8110 includes but not limited to rectangular protrusions, arc protrusions and the like.
  • the protruding structure 8110 can also be formed by punching the fixing band 810 towards the direction of the battery cell 6 .
  • the size of the protruding structure 8110 can be set according to actual needs, specifically, the length of the protruding structure 8110 along the first direction X can be set according to the distance between two battery cells 6 adjacently arranged along the first direction X .
  • the width of the protruding structure 8110 can be set according to the width of at least one fixing belt 810 , and the height of the protruding structure 8110 can be set according to the distance between the wire harness isolation plate 8 and the battery cell 6 .
  • a plurality of protruding structures 8110 distributed at intervals may be provided on the fixing belt 810 , and the number of the plurality of protruding structures 8110 may be determined according to the number of battery cells 6 , which is not limited in the present application.
  • the protruding structure 8110 is provided on the fixing belt 810, so that the thickness of the position where the protruding structure 8110 is provided on the fixing belt 810 is greater than the thickness of other positions. Therefore, if the battery cells 6 are bulging and the fixing belt 810 is tensioned along the first direction X, the protruding structure 8110 can provide a downward pressing force to the plurality of battery cells 6 located below the fixing belt 810 , Strengthen the binding force produced by the fixing belt 810 on the battery 2 .
  • FIG. 3 the projection of the lifting structure 8110 does not overlap with the projection of the pole structure 610.
  • the pole structure 610 can also be called the electrode terminal of the battery cell 6, and the pole structure 610 is a conductive member for leading out the positive and negative electrodes in the battery cell 6.
  • the pole structure 610 is disposed on the top surface of one side of the battery cell 6 close to the wire harness isolation plate 8 .
  • the pole structure 610 may include a positive pole and a negative pole. One end of the pole structure 610 may be connected to the wire harness isolation plate 8 , and the other end may be connected to an external conductor, or to a pole of an adjacent battery cell 6 in the battery 2 .
  • FIG. 1 As shown in FIG.
  • multiple tabs 820 are integrated on the wire harness isolation plate 8 , and the positions of the multiple tabs 820 may correspond to the pole structures 610 of the battery cells 6 .
  • the post structure 610 may be electrically connected to the bar 820 to transmit current through the bar 820 .
  • the projection of the protrusion structure 8110 does not overlap with the projection of the pole structure 610, that is, when the battery cell 6 expands, the pole structure 610 faces a fixed direction.
  • the protruding structure 8110 will not contact the pole structure 610, so the influence of the protruding structure 8110 on the pole structure 610 can be reduced, and the influence of the protruding structure 8110 on the electrical connection performance of the battery cell 6 can be reduced. Influence.
  • FIG. 3 As shown in FIG. 3, FIG. 5 and FIG.
  • the projection of the lifting structure 8110 and the projection of the explosion-proof valve 620 do not overlap.
  • the explosion-proof valve 620 is disposed between the positive and negative poles of the pole structure 610 , that is, roughly in the middle of the battery cell 6 .
  • the explosion-proof valve 620 is a battery 2 accessory with breathable, waterproof and explosion-proof properties.
  • the explosion-proof valve 620 can be opened when the air pressure inside the battery 2 is large, that is, when the pressure difference between the inside and outside of the battery 2 is large, to exhaust and release the pressure of the battery 2, reduce the probability of thermal failure of the battery 2, and improve the safety performance of the battery 2 .
  • the projection of the protruding structure 8110 does not overlap with the projection of the explosion-proof valve 620 .
  • the protruding structure 8110 when the battery 2 has a row of battery cells 6 arranged along the first direction X, the protruding structure 8110 can be located between the positive pole or the negative pole and the explosion-proof valve 620 in the pole structure 610, or the pole The side of the post structure 610 away from the explosion-proof valve 620 (battery cell shoulder 6110 ).
  • the protruding structure 8110 can be located in the two rows arranged side by side along the first direction X. between adjacent pole structures 610 of a battery cell 6 , that is, between two adjacent battery cell shoulders 6110 .
  • the protruding structure 8110 will not contact the pole structure 610 and the explosion-proof valve 620 .
  • the projection of the raised structure 8110 does not overlap with the projection of the explosion-proof valve 620, and the raised structure 8110 will not squeeze the explosion-proof valve 620 so that the explosion-proof valve 620 cannot be opened normally, which can reduce the impact of the raised structure 8110 on the battery cell.
  • the influence of the explosion-proof valve 620 of the body 6 can be reduced to reduce the influence on the explosion-proof, breathable and pressure relief performance of the battery cell 6.
  • the protruding structure 8110 abuts against a side of the battery cell 6 close to at least one fixing band 810 .
  • the protruding structure 8110 is arranged above and below the fixing belt 810, and the protruding structure 8110 can be in contact with at least one battery cell 6 below the fixing belt 810.
  • the protruding structure 8110 can be in contact with the shoulder 6110 of the battery cell, and the shoulder 6110 of the battery cell is the area on both sides of the top surface of the battery cell 6 where the two pole structures 610 are far away from each other.
  • the protruding structure 8110 may also be in contact with the area between the explosion-proof valve 620 and the pole structure 610 .
  • the protruding structure 8110 is in contact with at least one battery cell 6, so that when the battery cell 6 bulges and the at least one fixing strap 810 is stretched along the first direction X, the fixing strap 810 can directly contact the at least one battery cell 6. contact, the fixing band 810 provides a larger, downward pressing force to the battery cell 6, further enhancing the binding force of the fixing band 810 on the battery 2
  • the battery 2 is fixedly connected to the wire harness isolation plate 8 , and the connection method includes welding.
  • the connection method includes welding.
  • the battery cell 6 bulges to cause a gap between the battery cells 6, thereby causing displacement in the battery 2, the displacement will affect the weld seam formed by the welding connection and the bar piece 820 electrically connected to the pole structure 610 on the wire harness isolation plate 8. Stress is generated, which can easily lead to excessive stress on the tab 820 and disconnection from the pole structure 610 , resulting in partial failure of the battery 2 .
  • FIG. 3 the connection method includes welding.
  • the raised structure 8110 is in contact with at least one battery cell 6 , and the pressure on the weld seam and the bar piece 820 can be shared to the raised structure 8110 , and thus to the fixing band 810 , because the fixing band
  • the mechanical properties of 810 itself can withstand greater pressure, thereby improving the safety of the battery 2 .
  • the fixing belt 810 can also be adhesively connected to the battery cell 6. Specifically, as shown in FIG. The pressure on the pad 820 is distributed to the fixing band 810 and the glue, which further improves the safety performance of the battery 2 .
  • the protruding structure 8110 abuts against the side of the battery cell 6 close to at least one fixing belt 810, which can reduce the displacement between the battery cells 6 and isolate the wiring harness when the battery cells 6 bulge.
  • the influence caused by the stress exerted by the bar piece 820 electrically connected to the pole structure 610 on the plate 8 reduces the probability that the battery 2 will fail due to excessive stress caused by the displacement of the battery cell 6 by the bar piece 820, and improves the battery 2. connection performance.
  • At least one fixing band 810 is integrally injected with the wire harness isolation plate 8 .
  • the width of the fixing belt 810 along the second direction Y is related to the arrangement of the wiring harness boards 820 and the space between the boards 820. Considering Space factor, if the width of the pad 820 is narrow, the thickness of the fixing belt 810 can be increased accordingly to improve the mechanical properties of the fixing belt 810 .
  • At least one fixing band 810 is arranged on the wire harness isolation plate 8 , and the connection method between the at least one fixing band 810 and the wire harness isolation plate 8 includes integral injection molding.
  • the one-piece injection molding structure can not only reduce the difficulty and complexity of manufacturing the wire harness isolation plate 8 and the fixing belt 810, but is also convenient to use, and can also increase the connection fastness between at least one fixing belt 810 and the wire harness isolation plate 8, and enhance at least one fixing belt 810.
  • the binding force of the belt 810 on the battery 2 along the first direction X further improves the safety performance of the battery 2 .
  • connection method between at least one fixing belt 810 and the wire harness isolation plate 8 also includes welding connection, locking connection and adhesive connection, etc.
  • the connection method can be set according to specific conditions, and the application does not limit this.
  • the material of at least one securing strap 810 includes metal.
  • the metal with mechanical properties such as hardness, strength, and stiffness can be selected to meet the assembly requirements to manufacture the fixing belt 810, such as steel.
  • the fixing belt 810 has functional requirements such as tensile resistance, compression resistance, and wear resistance.
  • the metal has better mechanical properties such as strength, hardness, and rigidity, which can enhance the use effect of at least one fixing strap 810 , thereby improving the safety performance of the battery 2 .
  • the battery 2 includes at least two battery cells 6 arranged side by side along a second direction Y, the second direction Y is perpendicular to the first direction X; , at least one fixing band 810 is located between the pole structures 610 of two adjacent battery cells 6 along the second direction Y.
  • the second direction Y is perpendicular to the stacking direction of the plurality of battery cells 6
  • the second direction Y is the length direction of the battery cells 6
  • At least one fixing band 810 is arranged between two pole structures 610 of two adjacent battery cells 6 along the second direction Y, specifically, the fixing band 810 is arranged on two adjacent two battery cells 6 between positive and negative poles.
  • the width of the protruding structure 8110 on the fixing belt 810 along the second direction Y is not greater than the distance between two adjacent positive poles or negative poles.
  • the number of fixing bands 810 in the battery 2 can be determined according to the number of battery cells 6 adjacently arranged along the second direction Y, for example, a fixing belt can be arranged between every two adjacent battery cells 6 along the second direction Y. Belt 810, which is not limited in this application.
  • At least one fixing band is provided between the pole structures 610 of two adjacent battery cells 6 in one row 810, not only can reduce the impact of at least one fixing band 810 on the pole structure 610, but also can increase the binding force of at least one fixing band 810 on the battery 2, reduce the probability of battery 2 thermal failure caused by excessive swelling of the battery cell 6, and further Improve the safety performance of battery 2.
  • the second aspect of the present application provides an electric device, including the battery 2 mentioned above, and the battery 2 is used to provide electric energy to the electric device.
  • the electric device can be any of the aforementioned devices or systems using the battery 2 , because the electric device includes the above-mentioned battery 2 , so the electric device has all the advantages of the above-mentioned battery 2 .
  • the battery 2 is included and the battery 2 is used to provide electric energy to the electric device.
  • the wire harness isolation plate 8 in the battery 2 is provided with a fixing band 810 and both ends of the fixing band 810 are fixedly connected to both sides of the battery 2 along the first direction X.
  • the fixing belt 810 can provide the battery 2 with a constraint force along the first direction X, that is, provide the battery 2 with a constraint force along the first direction X for the multiple battery cells 6 included in the battery 2, that is, constrain the multiple battery cells 6 Two large faces along the first direction X.
  • the fixing belt 810 can constrain the two large surfaces of the battery cells 6 that are swelled to a greater degree when the battery cells 6 bulge, reducing the number of battery cells 6 caused by swelling and other phenomena along the first direction.
  • the displacement generated on X reduces the probability of excessive swelling of the battery cell 6, thereby reducing the probability of excessive swelling of the battery 2, thereby improving the safety performance of the battery 2, and reducing the risk of battery 2 due to excessive swelling of the battery cell 6.
  • the probability of thermal failure occurs, reducing safety hazards.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请提供了一种电池模组及用电装置，电池模组包括电池、线束隔离板和至少一个固定带。电池包括至少一个电池单体；线束隔离板与至少一个电池单体电连接；至少一个固定带设置于线束隔离板上，且至少一个固定带沿第一方向延伸，至少一个固定带的两端分别与电池沿第一方向上的两侧固定连接，第一方向为至少一个电池单体的厚度方向。本申请提供的电池模组及用电装置，能够降低电池发生过度鼓胀的概率，提高电池的安全性能，降低电池因为电池单体过度鼓胀而发生热失效的概率，降低安全隐患。

Description

一种电池模组及用电装置
相关申请的交叉引用
本申请要求享有于2022年01月05日提交的名称为“一种电池模组及用电装置”的中国专利申请202220030319.9的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电化学装置技术领域，特别是涉及一种电池模组及用电装置。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。相关技术中，电池由于过充、过放、短路及高温存储等原因，电池内部的电池单体易于出现鼓胀等现象，导致电池鼓包，从而影响电池的安全性，易发生安全隐患。
发明内容
本申请提供一种电池模组及用电装置，以降低电池出现过度鼓胀而引起电池热失效的概率，提高电池的安全性能，降低安全隐患。具体技术方案如下：
本申请第一方面提供了一种电池模组，包括电池、线束隔离板和至少一个固定带。电池包括至少一个电池单体；线束隔离板与至少一个电池 单体电连接；至少一个固定带设置于线束隔离板上，且至少一个固定带沿第一方向延伸，至少一个固定带的两端分别与电池沿第一方向上的两侧固定连接，第一方向为至少一个电池单体的厚度方向。
本申请提供的技术方案中，线束隔离板上设置有固定带且固定带的两端与电池沿第一方向上的两侧固定连接。固定带可以为电池提供沿第一方向上的约束力，也就是为电池中包括的多个电池单体提供沿第一方向上的约束力，即约束多个电池单体沿第一方向上的两个大面。因此，固定带可以在电池单体发生鼓胀时，对电池单体鼓胀程度较大的两个大面进行约束，减小多个电池单体因鼓胀等现象导致的沿第一方向上产生的位移，降低电池单体发生过度鼓胀等现象的概率，从而降低电池发生过度鼓胀等现象的概率，进而提高电池的安全性能，降低电池因为电池单体过度鼓胀而发生热失效的概率，降低安全隐患。
本申请的实施例中，电池包括端板，端板设置于至少一个电池单体沿第一方向上的至少一侧，至少一个固定带与端板固定连接。固定带可以为电池提供沿第一方向上的约束力。在电池单体发生鼓胀时，对电池单体鼓胀程度较大的两个大面进行约束，减小多个电池单体因鼓胀等现象导致的沿第一方向上产生的位移，降低电池单体发生过度鼓胀等现象的概率，进而提高电池的安全性能。
本申请的实施例中，至少一个固定带的靠近至少一个电池单体的一侧具有凸起结构。凸起结构可以在电池单体产生鼓胀现象而使固定带沿第一方向张紧时，向至少一个电池单体提供一个向下的压紧力，增强固定带对电池产生的约束力。
本申请的实施例中，至少一个电池单体靠近至少一个固定带的一侧具有极柱结构，沿垂直于线束隔离板的方向，凸起结构的投影与极柱结构的投影不交叠。凸起结构的投影与极柱结构的投影不交叠，能够降低凸起 结构对电池极柱结构的影响，降低对电池单体的电连接性能的影响。
本申请的实施例中，至少一个电池单体的靠近至少一个固定带的一侧具有防爆阀，沿垂直于线束隔离板的方向，凸起结构的投影与防爆阀的投影不交叠。凸起结构的投影与防爆阀的投影不交叠，能够降低凸起结构对电池单体的防爆阀的影响，降低对电池单体的防爆、透气和泄压性能的影响。
本申请的实施例中，凸起结构与电池单体靠近至少一个固定带的一侧抵接。可以在电池单体产生鼓胀现象时，降低电池单体间产生的位移对线束隔离板上与极柱结构电连接的巴片施加的应力造成的影响，降低巴片因为电池单体发生位移而产生的应力过大而导致电池失效的概率，提高电池的电连接性能。
本申请的实施例中，至少一个固定带与线束隔离板为一体注塑。一体注塑结构能够增加至少一个固定带与线束隔离板之间的连接紧固性，增强至少一条固定带对电池沿第一方向上的约束力，进一步提高电池的安全性能。
本申请的实施例中，至少一个固定带的材料包括金属。金属的强度、硬度和刚度等力学性能较好，能够增强至少一个固定带的使用效果，进而提高电池的安全性能。
本申请的实施例中，电池包括沿第二方向并排设置的至少两个电池单体，第二方向垂直于第一方向；沿第二方向，至少一个固定带位于沿第二方向相邻的两个电池单体的极柱结构之间。在两个相邻设置的电池单体的极柱结构之间设置至少一个固定带，不但可以降低至少一个固定带对极柱结构的影响，而且能够提高至少一个固定带对电池的约束力，降低电池内电池单体过度鼓胀的概率，进一步提高电池的安全性能。
本申请第二方面提供了一种用电装置，包括上述中任一所述的电池 模组，电池模组中的电池用于向用电装置提供电能。
当然，实施本申请的任一产品或方法并不一定需要同时达到以上所述的所有优点。上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的实施例。
图1为本申请的一些实施例的一种车辆的结构示意图；
图2为本申请的一些实施例的一种电池的分解结构示意图；
图3为本申请的一些实施例的一种电池的结构示意图；
图4为本申请的一些实施例的一种线束隔离板的结构示意图；
图5为本申请的一些实施例的一种电池的一种局部剖视图；
图6为本申请的一些实施例的一种电池的一种局部剖视图；
图7为图4中区域A的放大图。
附图标记：1-车辆、2-电池、3-控制器、4-马达、5-箱体、6-电池单体、8-线束隔离板、51-第一部分、52-第二部分、610-极柱结构、620-防爆阀、710-端板、810-固定带、820-巴片、830-柔性电路板、6110-电池单体肩部、8110-凸起结构、X-第一方向、Y-第二方向。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越发广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
电池由于过充、过放、短路及高温存储等原因，电池内部电池单体易发生鼓胀现象。随着电池的充放电循环中正极活性物质和负极活性物质嵌入或脱出离子，电池单体体系副反应堆积厚度及石墨片层剥离等导致电池单体会发生鼓胀。电池单体为电池的重要组成部分，电池单体鼓胀对电池的性能及使用寿命有不利影响。电池单体堆叠构成电池模组时，相邻电池单体的大面贴紧设置，电池模组中电池单体过度鼓胀时，将会引起电池失效甚至爆炸现象，影响电池的安全性能。
基于以上考虑，为了解决电池单体在使用过程中因为过充、过放、短路及高温存储等原因引起电池单体鼓胀，从而导致电池的性能及使用寿命降低，电池单体过度鼓胀导致电池失效或爆炸等问题。发明人经过深入研究，设计了一种电池，通过在电池内设置至少一个固定带，并将至少一个固定带与电池模组固定连接，当电池单体发生鼓胀等现象而导致电池模组内电池单体产生位移时，至少一个固定带能够对电池模组进行约束，降低电池因过度鼓胀发生爆炸等安全问题的概率，提高电池的安全性能。
本申请实施例公开的电池可以但不限用于车辆、船舶或飞行器等用电装置中。可以使用具备本申请公开的电池组成该用电装置的电源系统，这样，有利于降低电池因过度鼓胀发生爆炸等安全问题的概率，提高电池的安全性能。
本申请实施例提供一种使用电池作为电源的用电装置，用电装置可以是手机、便携式设备、笔记本电脑、电瓶车、电动汽车、轮船、航天器、电动玩具和电动工具等，例如，航天器包括飞机、火箭、航天飞机和宇宙飞船等等，电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨。
以下实施例为了方便说明，以本申请一实施例的一种用电装置为车辆为例进行说明。
本申请实施例描述的电池不仅仅局限适用于上述所描述的用电装置，还可以适用于所有使用电池的装置，但为描述简洁，下述实施例均以电动汽车为例进行说明。
例如，如图1所示，车辆1可以为燃油汽车、燃气汽车或新能源汽 车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1的内部可以设置电池2、控制器3以及马达4，控制器3用来控制电池2为马达4的供电。例如，在车辆1的底部或车头或车尾可以设置电池2。电池2可以用于车辆1的供电，例如，电池2可以作为车辆1的操作电源，用于车辆1的电路系统，例如，用于车辆1的启动、导航和运行时的工作用电需求。
在本申请的另一实施例中，电池2不仅仅可以作为车辆1的操作电源，还可以作为车辆1的驱动电源，替代或部分地替代燃油或天然气为车辆1提供驱动动力。
本申请第一方面提供了一种电池模组，如图1、图2和图3所示，电池模组包括电池2、线束隔离板8和至少一个固定带810。电池2包括至少一个电池单体6；线束隔离板8与至少一个电池单体6电连接；至少一个固定带810设置于线束隔离板8上，且至少一个固定带810沿第一方向X延伸，至少一个固定带810的两端分别与电池2沿第一方向X上的两侧固定连接，第一方向X为至少一个电池单体6的厚度方向。
如图1和图2所示，电池2可以为由一个或多个电池单体6连接形成的模块结构。如图2和图3所示，电池2可以包括沿电池单体6的厚度方向堆叠设置的多个电池单体6。其中，多个电池单体6之间可串联或并联或混联，混联是指多个电池单体6中既有串联又有并联。电池单体6可以为二次电池或一次电池，还可以是锂硫电池、钠离子电池或镁离子电池等，但不局限于此。其中，电池单体6可呈圆柱体、扁平体、长方体或其它形状等。如图3所示，电池单体6包括极柱结构610，极柱结构610为能够将电池单体6内的正负电极引出的导电件。
进一步的，如图3所示，线束隔离板8上还可以设置有巴片820、输出极巴片和柔性电路板830。具体的，巴片820与电池单体6上的极柱 结构610电连接。线束隔离板8还可以用于电池采样线的安装与固定，其中，电池采样线为用于采集各个电池单体6的电流及电压等电信号的导线。此外，线束隔离板8还可以用于电池2的导气及排气。
本申请实施例中，如图3所示，第一方向X为电池单体6的厚度方向，也就是多个电池单体6堆叠设置时的堆叠方向。固定带810设置于线束隔离板8上，且固定带810沿第一方向X延伸。如图5所示，固定带810的两端朝向电池2弯折并与电池2的两侧固定连接。因此固定带810可以对电池2两侧进行约束，降低其产生过度鼓胀的概率。其中，固定带810、巴片820、输出极巴片和柔性电路板830等部件可以通过热铆接工艺与线束隔离板8连接固定。
本申请实施例提供的电池模组中，如图3所示，线束隔离板8上设置有固定带810且固定带810的两端与电池2沿第一方向X上的两侧固定连接。固定带810可以为电池2提供沿第一方向X上的约束力，也就是为电池2中包括的多个电池单体6提供沿第一方向X上的约束力，即约束多个电池单体6沿第一方向X上的两个大面。因此，固定带810可以在电池单体6发生鼓胀时，对电池单体6鼓胀程度较大的两个大面进行约束，减小多个电池单体6因鼓胀等现象导致的沿第一方向X上产生的位移，降低电池单体6发生过度鼓胀等现象的概率，从而降低电池2发生过度鼓胀等现象的概率，进而提高电池2的安全性能，降低电池2因为电池单体6过度鼓胀而发生热失效的概率，降低安全隐患。
此外，当固定带810限制电池2中电池单体6沿厚度方向上产生过度鼓胀现象时，电池单体6的主要鼓胀力产生方向会由电池单体6的厚度方向变换为电池单体6的高度方向。且电池单体6的顶盖上可以设置有防爆透气阀，因此电池单体6内产生的高压气体可更多的经由防爆透气阀排出，实现电池2的透气和泄压，进一步降低电池2的鼓胀程度，提高电池 2的安全性能。此外，线束隔离板8覆盖于电池2的上端且与固定带810固定连接，不但可以增加固定带810与电池2的连接紧固性，而且线束隔离板8也具有一定的导气、排气等功能，从而能够降低电池单体6出现过度鼓胀的概率，进一步提高电池2的安全性能。
进一步的，如图2所示，电池2还可以包括电池箱体5，多个电池单体6容纳于电池箱体5内。其中，电池箱体5用于为电池单体6或多个电池单体6构成的电池模块提供容纳空间。具体的，多个电池单体6之间可直接串联或并联或混联在一起，然后置于电池箱体5内。多个电池单体6也可以先串联或并联或混联组成一个或多个电池模块，然后将电池模块一并容纳于箱体5内。电池箱体5可以采用多种结构。
进一步的，如图2所示，电池箱体5可以包括第一部分51和第二部分52，第一部分51与第二部分52相互盖合，第一部分51和第二部分52共同限定出用于容纳电池单体6的容纳空间。第一部分51可以为一端开口的空心结构，第二部分52可以为板状结构，第二部分52盖合于第一部分51的开口侧，以使第一部分51与第二部分52共同限定出容纳空间。第一部分51和第二部分52也可以是均为一侧开口的空心结构，第二部分52的开口侧盖合于第一部分51的开口侧。当然，第一部分51和第二部分52形成的电池箱体5可以是多种形状，比如，圆柱体、长方体等。此外，电池2还可以包括其他结构，例如汇流部件等，本申请对此不作限定。
在一些实施例中，如图3、图4和图5所示，电池2包括端板710，端板710设置于至少一个电池单体6沿第一方向X上的至少一侧，至少一个固定带810与端板710固定连接。
本申请实施例中，如图3所示，端板710为设置于电池2沿第一方向X上的一侧或两侧以对电池2内的电池单体6进行固定的结构件。具体的，如图3所示，电池2可以包括两个端板710，两个端板710相对设 置，分别与至少一个电池单体6沿第一方向X上的两侧侧面接触，以固定至少一个电池单体6，降低至少一个电池单体6在电池箱体5内移动从而影响电池2的性能和安全性的概率。如图5所示，由于端板710位于电池2的两侧，至少一个固定带810的两端可以与两个端板710固定连接，以通过端板710与电池2的两侧固定连接。端板710与固定带810的两端的连接方式包括锁付连接。具体的，端板710上设置有螺纹孔，端板710通过螺栓与至少一个固定带810锁付连接，连接紧固性较高。此外，端板710与固定带810的两端的连接方式还包括卡扣连接等，本申请对此不作限定。
本申请实施例中，如图5所示，至少一个固定带810的两端与电池2沿第一方向X上的两侧上的端板710固定连接，可以为电池2提供沿第一方向X上的约束力。固定带810可以在电池单体6发生鼓胀时，对电池单体6鼓胀程度较大的两个大面进行约束，减小多个电池单体6因鼓胀等现象导致的沿第一方向X上产生的位移，降低电池单体6发生过度鼓胀等现象的概率，从而降低电池2发生过度鼓胀等现象的概率，进而提高电池2的安全性能，降低电池2因为电池单体6过度鼓胀而发生热失效的概率，降低安全隐患。
在一些实施例中，如图6所示，至少一个固定带810的靠近至少一个电池单体6的一侧具有凸起结构8110。
本申请实施例中，如图6所示，凸起结构8110设置于至少一个固定带810的靠近至少一个电池单体6的一侧。凸起结构8110包括但不限于矩形凸起、弧形凸起等。此外，凸起结构8110还可以通过朝向电池单体6的方向对固定带810进行冲压形成。其中，凸起结构8110的尺寸可沿实际需求设置，具体的，凸起结构8110沿第一方向X上的长度可根据沿第一方向X相邻设置的两个电池单体6间的距离设置。此外，凸起结构8110 的宽度可根据至少一个固定带810的宽度设置，凸起结构8110的高度可根据线束隔离板8与电池单体6之间的距离高度设置。进一步的，固定带810上可以设置有间隔分布的多个凸起结构8110，且多个凸起结构8110的数量可根据电池单体6的数量确定，本申请对此不作限定。
本申请实施例中，在固定带810上设置凸起结构8110，使得固定带810上设有凸起结构8110的位置的厚度大于其他位置的厚度。因此若电池单体6产生鼓胀现象而使固定带810沿第一方向X张紧时，凸起结构8110能够向位于固定带810下方的多个电池单体6提供一个向下的压紧力，增强固定带810对电池2产生的约束力。
在一些实施例中，如图3、图5和图6所示，至少一个电池单体6靠近至少一个固定带810的一侧具有极柱结构610，沿垂直于线束隔离板8的方向，凸起结构8110的投影与极柱结构610的投影不交叠。
本申请实施例中，如图3所示，极柱结构610也可称为电池单体6的电极端子，极柱结构610为用于将电池单体6内的正、负电极引出的导电件，极柱结构610设置于电池单体6的靠近线束隔离板8的一侧顶面上。极柱结构610可以包括正极柱和负极柱。极柱结构610一端可以与线束隔离板8连接，另一端可以与外部导体连接，或与电池2中相邻的电池单体6的一极连接。具体的，如图7所示，线束隔离板8上集成有多个巴片820，且多个巴片820的位置可以与电池单体6的极柱结构610相对应。极柱结构610可以与巴片820电连接以通过巴片820传输电流。
本申请实施例中，沿垂直于线束隔离板8的方向，凸起结构8110的投影与极柱结构610的投影不交叠，也就是，当电池单体6膨胀而导致极柱结构610朝向固定带810的方向移动时，凸起结构8110不会与极柱结构610接触，因此可以降低凸起结构8110对极柱结构610的影响，降低凸起结构8110对电池单体6的电连接性能的影响。
在一些实施例中，如图3、图5和图6所示，至少一个电池单体6的靠近至少一个固定带810的一侧具有防爆阀620，沿垂直于线束隔离板8的方向，凸起结构8110的投影与防爆阀620的投影不交叠。
本申请实施例中，如图3所示，防爆阀620设置于极柱结构610的正负极极柱之间，即设置于电池单体6的大致中间位置。防爆阀620是一种具有透气、防水、防爆性能的电池2配件。防爆阀620能够在电池2内气压较大时，即电池2内外压差较大时开启，以对电池2进行排气和泄压，降低电池2出现热失效的概率，提高电池2的安全性能。沿垂直于线束隔离板8的方向，凸起结构8110的投影与防爆阀620的投影不交叠。
本申请实施例中，当电池2内具有沿第一方向X排列的一列电池单体6时，凸起结构8110可以位于极柱结构610中正极柱或负极柱与防爆阀620之间，或极柱结构610远离防爆阀620的一侧(电池单体肩部6110)。当电池2内具有沿第一方向X排列的两列电池单体6，且两列电池单体6沿第二方向Y并排设置时，凸起结构8110可以位于沿第一方向X并排设置的两个电池单体6的相靠近的极柱结构610之间，即相靠近的两个电池单体肩部6110之间。电池单体6膨胀而导致极柱结构610朝向固定带810的方向移动时，凸起结构8110不会与极柱结构610和防爆阀620接触。
本申请实施例中，凸起结构8110的投影与防爆阀620的投影不交叠，凸起结构8110不会挤压防爆阀620导致防爆阀620无法正常开启，能够降低凸起结构8110对电池单体6的防爆阀620的影响，降低对电池单体6的防爆、透气和泄压性能的影响。
在一些实施例中，如图3、图5和图6所示，凸起结构8110与电池单体6靠近至少一个固定带810的一侧抵接。
本申请实施例中，凸起结构8110设置于固定带810上下方，凸起 结构8110可以与固定带810下方的至少一个电池单体6抵接。具体的，凸起结构8110可以与电池单体肩部6110抵接，电池单体肩部6110为电池单体6顶面的两个极柱结构610相远离的两侧区域。并且，凸起结构8110也可以与防爆阀620和极柱结构610之间的区域抵接。凸起结构8110与至少一个电池单体6抵接，可以在电池单体6产生鼓胀现象、使至少一个固定带810沿第一方向X张紧时，固定带810直接与至少一个电池单体6接触，固定带810向电池单体6提供一个更大的、向下的压紧力，进一步增强固定带810对电池2产生的约束力
本申请实施例中，如图3所示，电池2与线束隔离板8固定连接，连接方式包括焊接。当电池单体6鼓胀导致电池单体6间产生间隙，从而引起电池2内产生位移时，位移会对焊接连接形成的焊缝和线束隔离板8上与极柱结构610电连接的巴片820产生应力，极易导致巴片820受到的应力过大从而与极柱结构610断开连接，导致电池2部分失效。如图5所示，此时凸起结构8110与至少一个电池单体6抵接，可以将焊缝和巴片820受到的压力分担给凸起结构8110，从而分担至固定带810，由于固定带810自身具有的力学性能，能够承受较大的压力，进而提高电池2的安全性。
进一步的，固定带810还可以与电池单体6胶粘连接，具体的，如图6所示，凸起结构8110与电池单体肩部6110通过胶粘固定连接，此时可以将焊缝和巴片820受到的压力分担给固定带810和胶，进一步提高电池2的安全性能。
本申请实施例中，凸起结构8110与电池单体6靠近至少一个固定带810的一侧抵接，可以在电池单体6产生鼓胀现象时，降低电池单体6间产生的位移对线束隔离板8上与极柱结构610电连接的巴片820施加的应力造成的影响，降低巴片820因为电池单体6发生位移产生的应力过大 而导致电池2失效的概率，提高电池2的电连接性能。
在一些实施例中，至少一个固定带810与线束隔离板8为一体注塑。
本申请实施例中，如图3、图4和图7所示，固定带810沿第二方向Y上的宽度与线束板巴片820的排列情况及巴片820间的空间大小相关，考虑到空间因素，若巴片820宽度较窄，可相应增加固定带810的厚度，以提高固定带810的力学性能。至少一个固定带810设置于线束隔离板8上，至少一个固定带810与线束隔离板8的连接方式包括一体注塑。一体注塑结构既可以降低线束隔离板8和固定带810制造的工艺难度和复杂度，使用方便，还能够增加至少一个固定带810与线束隔离板8之间的连接紧固性，增强至少一条固定带810对电池2沿第一方向X上的约束力，进一步提高电池2的安全性能。
本申请实施例中，至少一个固定带810与线束隔离板8的连接方式还包括焊接连接、锁付连接和胶粘连接等，连接方式可根据具体情况设置，本申请对此不作限定。
在一些实施例中，至少一个固定带810的材料包括金属。
本申请实施例中，可以选择硬度、强度、刚度等力学性能符合装配要求的金属来制造固定带810，例如钢，钢作为合金金属，种类繁多，性能优越且成本较低，可以很好的满足固定带810的抗拉、抗压、抗磨损等功能需求。
本申请实施例中，金属的强度、硬度和刚度等力学性能较好，能够增强至少一个固定带810的使用效果，进而提高电池2的安全性能。
在一些实施例中，如图3和图4所示，电池2包括沿第二方向Y并排设置的至少两个电池单体6，第二方向Y垂直于第一方向X；沿第二方向Y，至少一个固定带810位于沿第二方向Y相邻的两个电池单体6的极 柱结构610之间。
本申请实施例中，如图3所示，第二方向Y垂直于多个电池单体6的堆叠方向，第二方向Y为电池单体6的长度方向。至少一个固定带810设置于沿第二方向Y相邻的两个电池单体6两个极柱结构610之间，具体的，固定带810设置于两个电池单体6的相靠近的两个正极柱或负极柱之间。且固定带810上的凸起结构8110沿第二方向Y上的宽度不大于相靠近的两个正极柱或负极柱之间的距离。
电池2中固定带810的数量可以根据沿第二方向Y相邻设置的电池单体6的数量确定，例如，沿第二方向Y上每相邻两个电池单体6之间可以设置一个固定带810，本申请对此不作限定。
本申请实施例中，在沿第二方向Y并排设置的至少两排电池单体6中，其中一排中相邻设置的两个电池单体6的极柱结构610之间设置至少一个固定带810，不但可以降低至少一个固定带810对极柱结构610的影响，而且能够提高至少一个固定带810对电池2的约束力，降低电池单体6过度鼓胀而导致电池2热失效的概率，进一步提高电池2的安全性能。
本申请第二方面提供了一种用电装置，包括上述中的电池2，电池2用于向用电装置提供电能。
用电装置可以是前述任一应用电池2的设备或系统，因为用电装置包括上述中的电池2，故用电装置具有上述电池2的所有优点。
在本申请实施例提供的用电装置的电池模组中，包括电池2且电池2用于向用电装置提供电能。电池2中的线束隔离板8上设置有固定带810且固定带810的两端与电池2沿第一方向X上的两侧固定连接。固定带810可以为电池2提供沿第一方向X上的约束力，也就是为电池2中包括的多个电池单体6提供沿第一方向X上的约束力，即约束多个电池单体6沿第一方向X上的两个大面。因此，固定带810可以在电池单体6发生鼓 胀时，对电池单体6鼓胀程度较大的两个大面进行约束，减小多个电池单体6因鼓胀等现象导致的沿第一方向X上产生的位移，降低电池单体6发生过度鼓胀等现象的概率，从而降低电池2发生过度鼓胀等现象的概率，进而提高电池2的安全性能，降低电池2因为电池单体6过度鼓胀而发生热失效的概率，降低安全隐患。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (10)

  1. 一种电池模组，包括：
    电池，所述电池包括至少一个电池单体；
    线束隔离板，所述线束隔离板与所述至少一个电池单体电连接；
    至少一个固定带，所述至少一个固定带设置于所述线束隔离板上，且所述至少一个固定带沿第一方向延伸，所述至少一个固定带的两端分别与所述电池沿第一方向上的两侧固定连接，所述第一方向为所述至少一个电池单体的厚度方向。
  2. 根据权利要求1所述的电池模组，其中，所述电池包括端板，所述端板设置于所述至少一个电池单体沿所述第一方向上的至少一侧，所述至少一个固定带与所述端板固定连接。
  3. 根据权利要求1或2所述的电池模组，其中，所述至少一个固定带的靠近所述至少一个电池单体的一侧具有凸起结构。
  4. 根据权利要求3所述的电池模组，其中，所述至少一个电池单体靠近所述至少一个固定带的一侧具有极柱结构，沿垂直于所述线束隔离板的方向，所述凸起结构的投影与所述极柱结构的投影不交叠。
  5. 根据权利要求3或4所述的电池模组，其中，所述至少一个电池单体的靠近所述至少一个固定带的一侧具有防爆阀，沿垂直于所述线束隔离板的方向，所述凸起结构的投影与所述防爆阀的投影不交叠。
  6. 根据权利要求3至5中任意一项所述的电池模组，其中，所述凸起结构与所述电池单体靠近所述至少一个固定带的一侧抵接。
  7. 根据权利要求1至6中任意一项所述的电池模组，其中，所述至少一个固定带与所述线束隔离板为一体注塑。
  8. 根据权利要求1至7中任意一项所述的电池模组，其中，所述至少 一个固定带的材料包括金属。
  9. 根据权利要求1至8中任意一项所述的电池模组，其中，所述电池包括沿第二方向并排设置的至少两个电池单体，所述第二方向垂直于所述第一方向；
    沿所述第二方向，所述至少一个固定带位于沿所述第二方向相邻的所述两个电池单体的极柱结构之间。
  10. 一种用电装置，所述用电装置包括权利要求1至9中任一项所述的电池模组，所述电池模组中的电池用于向所述用电装置提供电能。
PCT/CN2022/085117 2022-01-05 2022-04-02 一种电池模组及用电装置 WO2023130596A1 (zh)

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CN206584989U (zh) * 2017-03-29 2017-10-24 宁德时代新能源科技股份有限公司 电池包
CN110085780A (zh) * 2019-05-31 2019-08-02 杭州捷能科技有限公司 一种轻质高强度的电池模组
CN213340549U (zh) * 2020-07-01 2021-06-01 安徽绿沃循环能源科技有限公司 动力电池组
WO2021108986A1 (zh) * 2019-12-03 2021-06-10 宁德时代新能源科技股份有限公司 电池模组、电池组、装置及电池模组的制造方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103518274A (zh) * 2011-03-11 2014-01-15 锂电池科技有限公司 储能装置
CN206584989U (zh) * 2017-03-29 2017-10-24 宁德时代新能源科技股份有限公司 电池包
CN110085780A (zh) * 2019-05-31 2019-08-02 杭州捷能科技有限公司 一种轻质高强度的电池模组
WO2021108986A1 (zh) * 2019-12-03 2021-06-10 宁德时代新能源科技股份有限公司 电池模组、电池组、装置及电池模组的制造方法
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