WO2017162214A1 - Battery pack and assembly method therefor - Google Patents

Battery pack and assembly method therefor Download PDF

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Publication number
WO2017162214A1
WO2017162214A1 PCT/CN2017/078215 CN2017078215W WO2017162214A1 WO 2017162214 A1 WO2017162214 A1 WO 2017162214A1 CN 2017078215 W CN2017078215 W CN 2017078215W WO 2017162214 A1 WO2017162214 A1 WO 2017162214A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal plate
battery
adjacent
battery pack
battery cells
Prior art date
Application number
PCT/CN2017/078215
Other languages
French (fr)
Chinese (zh)
Inventor
孙尚传
Original Assignee
安徽巨大电池技术有限公司
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 安徽巨大电池技术有限公司 filed Critical 安徽巨大电池技术有限公司
Publication of WO2017162214A1 publication Critical patent/WO2017162214A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
    • H01M8/2475—Enclosures, casings or containers of fuel cell stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
    • H01M8/2485—Arrangements for sealing external manifolds; Arrangements for mounting external manifolds around a stack
    • 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
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates to the technical field of battery manufacturing, and in particular to a battery pack and a method of assembling the same.
  • bipolar battery structure is a common design method.
  • Bipolar batteries can be used to increase battery energy storage capacity based on weight and volume, reduce package weight and volume, and provide stable battery. Performance and low internal resistance.
  • the structure of a bipolar battery generally comprises a conductive bipolar layer, a so-called bipolar plate, which serves as an electrical interconnection between adjacent cells in a battery and as a partition between individual cells.
  • the bipolar plates need to be sufficiently conductive to transfer current from one single cell to another and have good chemical stability in the battery environment.
  • FIG. 1 is a schematic diagram showing the structure of a commonly used bipolar battery in the prior art (refer to the application file of CN1555584A).
  • the bipolar plate 2 is disposed.
  • a plurality of battery cells are formed at intervals inside the battery case 1.
  • the two sides of the bipolar plate 2 are the positive and negative electrodes of the battery (reference numerals 3 and 5 in the figure), and the insulating separator 4 between the positive and negative electrodes of the battery.
  • the liquid is filled in the gap between the respective bipolar plates 2.
  • bipolar battery structure when a battery unit expands or is damaged, it is easy to damage the battery unit adjacent thereto due to the unbuffered structure, for example, due to expansion, implicated damage and its phase.
  • the adjacent battery unit may even expand the entire outer casing of the battery, thereby destroying the entire battery pack structure. Therefore, a bipolar battery of such a structure is likely to cause a situation in which the entire battery pack is destroyed due to a failure of a single battery unit.
  • Embodiments of the present invention provide a battery pack and an assembly method thereof to solve the technical problem that the battery pack structure is unstable due to the lack of a safety protection structure existing in the prior art bipolar battery structure.
  • an embodiment of the present invention provides a battery pack including at least two battery units stacked, the outer casing of the battery unit includes an upper metal plate and a lower metal plate, and the upper metal plate a sealing member is disposed between the lower metal plate; the metal plate portions of the adjacent battery cells are electrically connected together to form a connection region and a separation region, the separation region including an arc segment bent toward the inner side of the battery unit, The upper metal plate and/or the lower metal plate are thinned in thickness of the curved segment.
  • connection region and the separation region are of unitary structure.
  • adjacent metal plate connection regions of adjacent battery cells are connected to each other in close proximity.
  • gaps are provided between adjacent metal plate connection regions of adjacent battery cells and connected by conductive blocks.
  • the sealing member is made of an elastic material, and one or more sealing members are respectively provided at both ends of the same battery unit.
  • each seal member when a plurality of seal members are respectively disposed at both ends of the same battery unit, the materials of each seal member may be the same or different.
  • each of the battery cells includes an anode plate, a cathode plate, and an insulating spacer disposed between the cathode plate and the anode plate.
  • an elastic support body is disposed between adjacent metal plate separation region portions of adjacent battery cells.
  • the battery pack further includes a circuit board disposed between adjacent metal plate separation regions of adjacent battery cells.
  • a sealing tape is attached to the outer periphery of the separation region of the two metal plates of the same battery unit.
  • the present invention also provides a battery assembly method, the assembly method comprising:
  • the outer casing of the battery unit comprises an upper metal plate and a lower metal plate, and a sealing member is disposed between the upper metal plate and the lower metal plate;
  • the upper metal plate and/or the lower metal plate comprises a connection region and a separation region, the separation region comprising an arc segment curved toward the inner side of the battery unit, the thickness of the arc segment being thinned.
  • the step of generating a plurality of battery units specifically includes:
  • An anode plate and a cathode plate are respectively attached to the upper and lower surfaces of the insulating spacer to form a battery inner core;
  • a sealing material is respectively attached to the opposite ends of the upper and lower metal plates;
  • connection region and the separation region are of unitary structure.
  • the separation region is provided at one or both ends of the metal plate.
  • the sealing material is an elastic material.
  • a plurality of sealing materials may be respectively attached to the opposite ends of the upper and lower metal plates, and each The sealing material is different, and the elastic modulus of the sealing material near the inner side of the battery unit is greater than the elastic modulus of the sealing material near the outer side of the battery unit.
  • the method further comprises providing an elastic support between adjacent metal plate separation regions of adjacent battery cells.
  • the method further comprises disposing a circuit board between adjacent metal plate separation regions of adjacent battery cells.
  • the method further includes applying a sealing tape on the outer periphery of the two metal plate separation regions of the same battery unit.
  • the battery pack and the assembling method thereof are provided by providing a separation area at the end of the battery unit casing and providing an arc segment bent toward the inner side of the battery unit on the separation area, when the battery unit expands.
  • the separation area and the curved section (the curved section is outwardly expanded and bent) can buffer or eliminate the problem that the volume of the battery unit due to expansion becomes large, and an elastic sealing element is disposed at the end of the battery unit.
  • the elastic sealing element will elastically deform, which can also play the role of battery unit expansion safety protection.
  • FIG. 1 is a schematic structural diagram of a conventional bipolar battery in the prior art
  • FIG. 2 is a schematic structural view of a first embodiment of a battery pack of the present invention
  • Figure 3 is a structural view of a first embodiment of a battery unit
  • FIG. 4 is a schematic structural view of a second embodiment of the battery pack of the present invention.
  • Figure 5 is a structural view of a second embodiment of the battery unit
  • Figure 6 is a structural view of a third embodiment of the battery unit
  • Figure 7 is a schematic view showing the deformation of the first sealing member 121 in the embodiment of Figure 6;
  • Figure 8 is a schematic structural view of a third embodiment of the battery pack of the present invention.
  • Figure 9 is a structural view of a fourth embodiment of a battery unit
  • Figure 10 is a schematic view showing the deformation of the arc segment of the battery unit in the embodiment of Figure 9;
  • Figure 11 is a schematic structural view of a fourth embodiment of the battery pack of the present invention.
  • Figure 12 is a schematic structural view of a seventh embodiment of the battery pack of the present invention.
  • Figure 13 is a schematic view showing a modified embodiment of the battery pack structure in the embodiment of Figure 12;
  • Figure 14 is a schematic view showing another modified embodiment of the battery pack structure in the embodiment of Figure 12;
  • 15 is a schematic flow chart of a first embodiment of a method for assembling a battery pack of the present invention.
  • Figure 16 is a schematic view showing a metal plate manufacturing process
  • Figure 17 is a schematic view showing a sealing material of a metal plate
  • Figure 18 is a schematic view showing the structure of a battery core in a metal plate in the first method embodiment
  • FIG. 19 is a schematic flow chart of a second embodiment of a method for assembling a battery pack of the present invention.
  • 20 is a first structural schematic view showing a method of pressing a battery inner core into a metal plate in a second method embodiment
  • 21 is a second schematic structural view of a second method embodiment for pressing a battery inner core into a metal plate
  • 22 is a third structural schematic view showing a method of pressing a battery inner core into a metal plate in a second method embodiment
  • Figure 23 is a fourth structural view showing the second embodiment of the battery core being pressed into the metal plate.
  • FIG. 2 is a schematic structural diagram of a first embodiment of a battery pack according to the present invention
  • the battery pack in the embodiment includes five battery units (A, B, C, D, E), of course, in other embodiments.
  • the number of battery cells is not limited to five, and may be two, three, four, six, or more. The exact amount depends on the output voltage requirements of the battery.
  • a plurality of battery cells connected in series may constitute a battery pack having a specified output voltage.
  • the outer side of the battery pack is the upper and lower end plates (11, 22), and the upper and lower end plates (11, 22) may be metal current collecting plates, which function as conductive and external support, and therefore need to have electrical conductivity and have A certain mechanical strength.
  • the upper and lower end plates (11, 22) may also be support plates for forming the outer casing of the battery pack.
  • the upper and lower end plates (11, 22) can provide metal support inside the battery case.
  • the upper and lower end plates (11, 22) can also serve as external positive and negative electrodes of the battery pack.
  • FIG. 3 is a structural diagram of a first embodiment of a battery unit. Both sides of each battery unit are provided with an upper metal plate and a lower metal plate 110. The metal plate portions of adjacent battery cells are electrically connected together. That is, the lower metal plate of the previous battery unit and the upper metal plate portion of the next battery unit are electrically connected together.
  • Each of the metal plates 110 may be divided into a connection region 111 and a separation region 112 based on a partial conductive connection between adjacent battery cells, wherein the connection region 111 is a metal plate and a metal plate of an adjacent battery cell is electrically connected. The area, the separation area is the area where the metal plate is separated from the metal plate of the adjacent battery unit.
  • the separation region 112 is disposed at one end of the metal plate 110, and the other end is the connection region 111 directly connected together.
  • the connection region 111 and the separation region 112 are integrally formed, and can be stamped by the same metal sheet. to make.
  • adjacent metal plate connection regions 111 of adjacent battery cells are directly abutting connections, of course, in other embodiments, adjacent metal plate connection regions 111 of adjacent battery cells are also It may be indirectly connected by a conductive substance. Adjacent metal plate connection regions 111 of adjacent battery cells may be pressed together, or welded together, or bonded together using a conductive adhesive or the like.
  • adjacent metal plate separation regions 112 of adjacent battery cells are separated to form a gap 505.
  • Such a structure can be pressed and contracted at the gap 505 formed at the separation region 112 when the battery unit is expanded or squeezed, and can cancel or alleviate the deformation of the battery unit metal plate.
  • the gap 505 at the separation region 112 corresponds to a buffer-type safety protection structure, which can effectively prevent the battery unit from being damaged. Ensure the stability of the battery pack structure.
  • the space of the gap 505 should not be too small.
  • the width L of the gap 505 is at least 20% of the thickness of the battery unit, and more preferably, the width L of the gap 505 is at least 40% of the thickness of the battery unit.
  • Those skilled in the art can also set the value of the width L of the gap 505 according to actual needs. Of course, in consideration of the battery capacity, the gap 505 cannot be set too large.
  • Each of the battery cells includes an anode plate 131, a cathode plate 132, and an insulating separator 133 disposed between the cathode plate 132 and the anode plate 131.
  • the anode and cathode plates between adjacent battery cells are alternately arranged.
  • a cavity 134 inside the battery unit is used to house the electrolyte.
  • Adjacent metal sheets of adjacent battery cells are preferably made of different materials.
  • the metal plate adjacent to the anode plate 131 can be selected based on the potential of the anode, such as copper or other materials.
  • the metal plate adjacent to the cathode plate 132 can be selected based on the potential of the cathode, such as aluminum or other materials. In other words, metal plates that are close to different plates can be selected based on the potential requirements of the cathode and anode.
  • the material for the anode plate 131 and the cathode plate 132 may be any suitable battery material.
  • the material of the anode plate 131 may be an alloy or an oxide of tin, lithium, calcium, or the like, or may be other materials capable of functioning as an anode of a battery such as silicon or graphite.
  • the material of the cathode plate 132 may be an oxide of lithium and lithium cobaltate. Lithium carbonate and the like are within the scope of those skilled in the art and will not be enumerated here.
  • the thickness of the metal plate 110 is preferably 2 to 100 ⁇ m, and on the one hand, the requirements for the bending process of the metal plate 110 can be satisfied, and on the other hand, the sealing strength of the battery unit can be satisfied. Further preferably, the metal plate 110 may have a thickness of between 5 and 80 microns.
  • a sealing member 120 is disposed between the separation regions 112 of the two metal plates of the same battery unit, so that two adjacent metal plates of the same battery unit can be sealingly combined to prevent electrolyte leakage.
  • the electrolyte can be solid, colloidal or liquid.
  • the seal 120 is capable of electrochemical isolation by sealing between adjacent battery cells.
  • the material of the sealing member 120 may be any material having good adhesion between metal layers and having good elasticity, such as composite materials, including rubber-asbestos, aerogel felt-polyurethane, etc.; rubber Class materials or plastics, etc.
  • FIG. 4 is a schematic structural view of a second embodiment of the battery pack of the present invention.
  • the battery pack in the embodiment also includes A, B, C, D, and E.
  • the difference between the five battery cells and the previous embodiment is that in the embodiment, the battery unit has a separation area at both ends, and a sealing member is disposed between the separation regions of the two metal plates of the same battery unit.
  • the structure can form more gaps 505 between the separation regions, thus further increasing the coefficient of expansion of the battery cells, which is doubled compared to the structure in Embodiment 1.
  • FIG. 5 is a structural diagram of a second embodiment of the battery unit.
  • the structure of the sealing member 120 is not limited to the structure in the embodiment, and may be a structural form extending to the inside of the battery unit cavity.
  • FIG. 6 is a structural diagram of a third embodiment of the battery unit.
  • a plurality of sealing members are disposed between the separated ends of the same end of the two metal plates of the same battery unit, and when the same battery unit is When a plurality of seals are disposed between the separated regions at the same end of the metal plate, the material of each seal may be the same or different.
  • the number of the sealing members in the embodiment is preferably two, that is, the first sealing member 121 and the second sealing member 122 in the figure, wherein the first sealing member 121 is located near the inner side of the battery unit, and the second sealing member 122 is located near the outer side of the battery unit.
  • the material elastic modulus of the first sealing member 121 near the inner side of the battery unit is greater than the material elastic modulus of the second sealing member 122 adjacent to the outer side of the battery unit, and more preferably, the thickness of the first sealing member 121 is smaller than the thickness of the second sealing member 122.
  • FIG. 7 is a schematic view showing the deformation of the first sealing member 121 in the embodiment of FIG. 6. The broken line in the figure indicates the deformation of the first sealing member 121.
  • FIG. 8 is a schematic structural view of a third embodiment of a battery pack according to the present invention.
  • adjacent ones of adjacent battery cells of the adjacent battery cells are disposed at the same end separation region.
  • the elastic support body 506 corresponds to a position where the elastic support body is filled to the original gap 505, and the elasticity of the elastic support body 506 can enhance the extension of the stacking direction of the battery pack.
  • the elastic support 506 can use any suitable material.
  • a material having the following properties such as silicone rubber, ethylene propylene diene monomer, polyethylene, and polyvinyl chloride is excellent in insulation, and can coexist with an electrolyte and can be stabilized at a voltage of 10 volts or less and 200 degrees or less.
  • the elastic support body is at least elastically deformable by 15% or more in the stacking direction of the battery cells.
  • FIG. 9 is a structural view of a fourth embodiment of the battery unit
  • FIG. 10 is a schematic view showing deformation of the arc segment of the battery unit in the embodiment of FIG. 9.
  • the battery of the embodiment and the embodiment 1 The unit structure is different in that the separation region 112 includes an arc segment 1102 bent toward the inner side of the battery unit. When the battery unit expands or is squeezed, the arc segment 1102 protrudes outward to offset or relieve the metal plate of the battery unit. deformation.
  • connection region 111 and the separation region 112 are a unitary structure, wherein the material thickness of the arc segment 1102 is smaller than the thickness of the other portion of the separation region 112 and the material of the connection region 111, or the thickness of the arc segment 1102 is smaller than the connection region 111. And one of the other portions of the separation region 112, the thickness of the material of the curved segment 1102 is designed to be smaller, mainly considering that the arc segment 1102 is less than the adjacent material when the cell is expanded or squeezed.
  • the connection region 111 and the separation region 112 can be more easily deformed, and the connection region 111, the separation region 112, and other portions of the battery unit are structurally stabilized to prevent damage of the battery unit.
  • the broken line in Fig. 10 indicates the case where the curved segment 1102 is deformed.
  • the material thickness of the metal plate in the curved segment 1102 can be reduced by 10%-50% compared to the thickness of the connection region 111 and/or the separation region 112, for example, 20%, 25%, 30%, 40%, etc. can be thinned. .
  • FIG. 11 is a schematic structural view of a fourth embodiment of the battery pack of the present invention.
  • the structure is set between adjacent battery cells compared to the structure of the first embodiment.
  • the conductive blocks 88 are specifically provided with gaps 801 between adjacent metal plate connection regions of adjacent battery cells and connected together by the conductive blocks 88.
  • the material of the conductive block 88 is preferably made of a soft material such as aluminum, titanium alloy or the like.
  • the soft material has the advantage that, when the battery unit expands or is squeezed, the conductive block 88 functions to electrically connect adjacent metal plates on the one hand, and can also undergo a certain deformation on the other hand, so that the battery unit is In addition to the deformation at the separation region 112, deformation can also occur at the location of the connection region 111.
  • FIG. 12 is a schematic structural view of a fifth embodiment of a battery pack according to the present invention.
  • the battery pack further includes a circuit board 150 disposed between the adjacent end regions of adjacent metal plates of adjacent battery cells.
  • Circuit board 150 is used for battery pack balancing, thermal management, or other possible functions.
  • the advantage of providing the circuit board 150 inside the battery pack is that the internal space of the battery pack can be fully utilized, and the number and length of the wires can be reduced without extending the wires of the electrodes to the outside of the battery pack case (not shown), thereby enhancing the battery.
  • the overall sealing of the group In order to further utilize the internal space of the battery pack, the circuit board 150 is preferably disposed on the same side of the separation area or on the same side of the battery pack.
  • FIG. 13 is a schematic diagram showing a modified embodiment of the battery pack structure in the embodiment of FIG. 12.
  • a sealing tape 160 is also attached to the outer periphery of the separation portion of the same end of the plate.
  • the material of the sealing tape 160 may be a material such as ceramic or polymer.
  • the function of the sealing tape 160 includes preventing the circuit board 150 from being short-circuited, providing better chemical or electrochemical stability, and providing better mechanical strength of the battery unit and the like.
  • FIG. 14 is a schematic view showing another modified embodiment of the battery pack structure in the embodiment of FIG. 12, in which the sealing tape 160 is not It must be provided together with the circuit board 150, and of course, the sealing tape 160 may be separately provided on the outer periphery of the battery cell separation region as shown in FIG.
  • the battery units are respectively provided with different safety protection structures, including a gap at the separation area, an elastic support body, and an arc segment between the connection area of the metal plate and the separation area, etc.
  • different safety protection structures including a gap at the separation area, an elastic support body, and an arc segment between the connection area of the metal plate and the separation area, etc.
  • the circuit board is placed inside the battery pack to improve battery space utilization and is enhanced by providing sealing tape. Protection and sealing performance.
  • the above embodiment is a description of the overall structure of the battery unit and the battery pack.
  • the technical features in the above embodiments may, after different combinations, further extend more embodiments, and the skilled person does not have to work creatively.
  • a simple combination of the technical features of the present invention should also be within the scope of the present invention.
  • FIG. 15 is a schematic flow chart of a first embodiment of a method for assembling a battery pack according to the present invention, which includes, but is not limited to, the following steps.
  • Step S100 generating a plurality of battery cells, wherein the outer casing of the battery unit comprises an upper metal plate and a lower metal plate, and a sealing member is disposed between the upper metal plate and the lower metal plate.
  • step S110 a plurality of battery cells are stacked and electrically connected together of the metal plate portions of the adjacent battery cells to form a battery pack.
  • the method further includes the following steps: firstly, an anode plate and a cathode plate are respectively attached to the upper and lower surfaces of the insulating spacer to form a battery inner core; and then the upper and lower metal plates are oppositely The end portions of the side are respectively attached with a sealing material; and the battery core is pressed into the metal plate to form a battery unit; wherein the upper and lower metal plates are bonded together by the sealing material, and a sealed receiving cavity is formed. The battery core is disposed in the sealed receiving cavity.
  • FIG. 16 is a schematic diagram of a metal plate manufacturing process.
  • a metal plate is first formed, and the metal plate 110 can be first pressed out of the connection region 111 and the separation region 112, and then the two metal plates are connected.
  • the regions 111 are fixedly connected to each other in which it is necessary to ensure that the gap between the adjacent metal plate separation regions 112 is larger than the gap between the connection regions 111, forming the structure shown in the drawing.
  • This structure is generally referred to as a bipolar plate, and a fixed connection between adjacent metal plates of adjacent battery cells is employed.
  • adjacent metal plate connection regions 111 of adjacent battery cells are directly abutting connections, of course, in other embodiments, adjacent metal plate connection regions 111 of adjacent battery cells are also It may be indirectly connected by a conductive substance. Adjacent metal plate connection regions 111 of adjacent battery cells may be pressed together, or welded together, or bonded together using a conductive adhesive or the like. Adjacent metal plate separation regions 112 of adjacent battery cells are separated to form a gap. Such a structure can compress and contract the gap formed at the separation region 112 when the battery cell expands or is squeezed, and can cancel or alleviate the deformation of the battery unit metal plate. The gap at the separation area 112 is equivalent to a buffer type safety protection structure, which can effectively prevent the battery unit from being damaged and ensure the stability of the battery pack structure.
  • Adjacent metal sheets of adjacent battery cells are preferably made of different materials.
  • the metal plate adjacent to the anode plate 131 can be selected based on the potential of the anode, such as copper or other materials.
  • the metal plate adjacent to the cathode plate 132 can be selected based on the potential of the cathode, such as aluminum or other materials. In other words, metal plates that are close to different plates can be selected based on the potential requirements of the cathode and anode.
  • the material for the anode plate 131 and the cathode plate 132 may be any suitable battery material.
  • the material of the anode plate 131 may be an alloy or an oxide of tin, lithium, calcium, or the like, or may be other materials capable of functioning as an anode of a battery such as silicon or graphite.
  • the material of the cathode plate 132 may be an oxide of lithium and lithium cobaltate. Lithium carbonate and the like are within the scope of those skilled in the art and will not be enumerated here.
  • the thickness of the metal plate 110 is preferably 2 to 100 ⁇ m, and on the one hand, the requirements for the bending process of the metal plate 110 can be satisfied, and on the other hand, the sealing strength of the battery unit can be satisfied. Further preferably, the metal plate 110 may have a thickness of between 5 and 80 microns.
  • FIG. 17 is a schematic view showing the sealing material of the metal plate, and the sealing material 1205 is respectively attached to the opposite ends of the prepared metal plate.
  • a sealing member 120 is disposed between the separation regions 112 of the two metal plates of the same battery unit, so that two adjacent metal plates of the same battery unit can be sealingly combined to prevent electrolyte leakage.
  • the electrolyte can be solid, colloidal or liquid.
  • the seal 120 is capable of electrochemical isolation by sealing between adjacent battery cells.
  • the material of the sealing member 120 may be any material having good adhesion between metal layers and having good elasticity, such as composite materials, including rubber-asbestos, aerogel felt-polyurethane, etc.; rubber Class materials or plastics, etc.
  • FIG. 18 is a schematic structural view of the first embodiment of the battery core being pressed into the metal plate.
  • FIG. 19 is a schematic flow chart of a second embodiment of a method for assembling a battery pack according to the present invention; the method includes, but is not limited to, the following steps.
  • Step S200 generating a plurality of battery cells, wherein the outer casing of the battery unit comprises an upper metal plate and a lower metal plate, and a sealing member is disposed between the upper metal plate and the lower metal plate.
  • Step S210 stacking a plurality of battery cells, and electrically connecting the metal plate portions of adjacent battery cells together to form a battery pack; wherein the upper metal plate and/or the lower metal plate include a connection region and a separation region
  • the separation region includes an arc segment that is curved toward the inner side of the battery unit, and the thickness of the arc segment is thinned.
  • the metal plate 110 may have a flat structure before the pressing step, which is different from the case where the metal plate is first pressed out of the separation region and the connection region in the previous embodiment.
  • the separation region and the connection region are formed after the pressing, that is, the separation region and the connection region structure are pressed while bonding the sealing materials on both sides to form the sealing member, and the upper and lower metal plates are either
  • the separation region of the two includes an arc segment that is curved inside the battery unit, and the thickness of the arc segment is thinned so that when the battery unit expands or is squeezed, the arc segment can protrude outward to offset or relieve the battery. The deformation of the unit metal plate.
  • FIG. 20 is a first structural diagram of the second embodiment of the battery core being pressed into the metal plate.
  • FIG. 21 is a second embodiment of the battery core.
  • FIG. 22 is a schematic view showing a third structure in which a battery inner core is press-fitted into a metal plate in a second method embodiment, and
  • FIG. 23 is a second embodiment of the battery core.
  • Figure 20 is a schematic view showing the formation of the seals on both sides. After pressing, the structure of the battery unit in the embodiment of Fig. 4 is formed.
  • the reference numeral 110 is a metal plate, and the reference numeral 1205 is a sealing material (the same applies hereinafter); In the schematic diagram, sealing materials of different area sizes are disposed on both sides, and finally the structure of the battery unit in the embodiment of FIG. 5 can be obtained.
  • Figure 22 is a schematic view showing the formation of a one-sided seal. After pressing, the structure of the battery cell in the embodiment of Figure 3 is formed.
  • Figure 23 is a schematic view showing the structure of the multi-seal member. After pressing, the structure of the battery cell in the embodiment of Figure 7 is formed.
  • the embodiment of the method only gives a general assembly method for manufacturing the battery pack.
  • the battery pack can have many structures.
  • the battery pack corresponding to the deformed structure can be obtained by simple deformation of the method, and therefore will not be enumerated in the embodiment of the assembly method.
  • the separation region may be specifically disposed at one end or both ends of the metal plate; an elastic support body is disposed between the adjacent end regions of adjacent metal plates of adjacent battery cells; a circuit board is disposed between the adjacent metal plates of the unit at the same end separation area; a sealing tape is attached to the outer periphery of the same end of the same metal unit; and a plurality of seals and the like are provided, and detailed descriptions of these technical features are provided. Please refer to the relevant content in the above battery pack embodiment.
  • the battery pack assembly method provided by the embodiment of the present invention provides a safety protection structure in the battery unit, including a gap and an elastic support body at the separation area, and is disposed between the connection area of the metal plate and the separation area.
  • Arc segments, etc. can play the role of offsetting or mitigating the deformation of the battery unit metal plate when the battery unit expands or is squeezed.
  • the circuit board is placed inside the battery pack to improve the battery space utilization. And by providing sealing tape to enhance protection and sealing performance.

Abstract

Provided in the present invention are a battery pack and an assembly method therefor; the battery pack comprises at least two stacked battery cells; a housing of the battery cell comprises an upper metal plate and a lower metal plate, and a sealing member is provided between the upper metal plate and the lower metal plate; the metal plate portions of adjacent battery cells are conductively connected to one another to form a connection region and a separation region; the separation region comprises an arcuate section bent towards the inside of the battery cell, and the thickness of the upper metal plate and/or the lower metal plate decreases at the arcuate section. By providing a separation region at an end of the housing of the battery cell, and by providing an arcuate section bent toward the inside of the battery cell on the separation region, when battery cell expansion occurs, the separation region and the arcuate section which expands and bends outwardly can act as a buffer, or eliminate the problem wherein expansion causes the volume of the battery cell to increase, thus serving to safeguard against the expansion of battery cells.

Description

电池组及其组装方法 Battery pack and assembly method thereof
【技术领域】[Technical Field]
本发明涉及电池制造的技术领域，具体是涉及一种电池组及其组装方法。The present invention relates to the technical field of battery manufacturing, and in particular to a battery pack and a method of assembling the same.
【背景技术】 【Background technique】
目前，在燃料电池的结构设计中，双极电池结构是一种常见的设计方式，双极电池可用于提高以重量和体积为基础的电池能量存储容量、减少封装重量和体积、提供稳定的电池性能和低内阻。At present, in the structural design of fuel cells, bipolar battery structure is a common design method. Bipolar batteries can be used to increase battery energy storage capacity based on weight and volume, reduce package weight and volume, and provide stable battery. Performance and low internal resistance.
双极电池的结构一般包括导电的双极层，即所谓的双极板，它用作在电池中的相邻单电池之间的电互连以及作为各个电池单元之间的间壁。为了成功地利用双极结构，双极板需要充分地导电，以从一个单电池向另一单电池传输电流，并在电池环境中具有良好的化学稳定性。The structure of a bipolar battery generally comprises a conductive bipolar layer, a so-called bipolar plate, which serves as an electrical interconnection between adjacent cells in a battery and as a partition between individual cells. In order to successfully utilize the bipolar structure, the bipolar plates need to be sufficiently conductive to transfer current from one single cell to another and have good chemical stability in the battery environment.
请参阅图1，图1是现有技术中一种常用的双极电池的结构示意简图（参见专利公开号为CN1555584A的申请文件），在该双极电池结构中，其双极板2设置在电池外壳1的内部以间隔形成多个电池单元，双极板2的两侧分别为电池的正、负极（图中标号3、5），电池正、负极之间为绝缘隔板4，电解液填充于各双极板2之间的空隙内。该种双极电池结构存在的问题在于，当某一电池单元发生膨胀或者受到破坏时，由于没有缓冲的结构，其很容易使与其相邻的电池单元受到损坏，譬如由于膨胀而牵连破坏与其相邻的电池单元，甚至可能胀开电池的整体外壳，进而破坏掉整个电池组结构。因此，该种结构的双极电池很可能发生由于单个电池单元发生故障而导致整个电池组被破坏的情况。Please refer to FIG. 1. FIG. 1 is a schematic diagram showing the structure of a commonly used bipolar battery in the prior art (refer to the application file of CN1555584A). In the bipolar battery structure, the bipolar plate 2 is disposed. A plurality of battery cells are formed at intervals inside the battery case 1. The two sides of the bipolar plate 2 are the positive and negative electrodes of the battery (reference numerals 3 and 5 in the figure), and the insulating separator 4 between the positive and negative electrodes of the battery. The liquid is filled in the gap between the respective bipolar plates 2. The problem with this type of bipolar battery structure is that when a battery unit expands or is damaged, it is easy to damage the battery unit adjacent thereto due to the unbuffered structure, for example, due to expansion, implicated damage and its phase. The adjacent battery unit may even expand the entire outer casing of the battery, thereby destroying the entire battery pack structure. Therefore, a bipolar battery of such a structure is likely to cause a situation in which the entire battery pack is destroyed due to a failure of a single battery unit.
【发明内容】 [Summary of the Invention]
本发明实施例提供一种电池组及其组装方法，以解决现有技术双极电池结构中存在的由于缺少安全防护结构而导致电池组结构不稳定的技术问题。Embodiments of the present invention provide a battery pack and an assembly method thereof to solve the technical problem that the battery pack structure is unstable due to the lack of a safety protection structure existing in the prior art bipolar battery structure.
为解决上述问题，本发明实施例提供了一种电池组，所述电池组包括至少两个堆叠设置的电池单元，所述电池单元的外壳包括上金属板和下金属板，所述上金属板和下金属板之间设置有密封件；相邻电池单元的金属板部分的导电连接在一起，以形成连接区域和分离区域，所述分离区域包括一向电池单元内侧弯曲的弧形段，所述上金属板和/或所述下金属板在所述弧形段的厚度减薄。In order to solve the above problems, an embodiment of the present invention provides a battery pack including at least two battery units stacked, the outer casing of the battery unit includes an upper metal plate and a lower metal plate, and the upper metal plate a sealing member is disposed between the lower metal plate; the metal plate portions of the adjacent battery cells are electrically connected together to form a connection region and a separation region, the separation region including an arc segment bent toward the inner side of the battery unit, The upper metal plate and/or the lower metal plate are thinned in thickness of the curved segment.
根据本发明一优选实施例，所述连接区域和所述分离区域为一体结构。According to a preferred embodiment of the invention, the connection region and the separation region are of unitary structure.
根据本发明一优选实施例，相邻电池单元的相邻金属板连接区域之间相互紧靠连接。According to a preferred embodiment of the invention, adjacent metal plate connection regions of adjacent battery cells are connected to each other in close proximity.
根据本发明一优选实施例，相邻电池单元的相邻金属板连接区域之间设有间隙并通过导电块连接。According to a preferred embodiment of the present invention, gaps are provided between adjacent metal plate connection regions of adjacent battery cells and connected by conductive blocks.
根据本发明一优选实施例，所述密封件为弹性材料制成，且同一电池单元的两端分别设有一个或多个密封件。According to a preferred embodiment of the invention, the sealing member is made of an elastic material, and one or more sealing members are respectively provided at both ends of the same battery unit.
根据本发明一优选实施例，同一电池单元的两端分别设置多个密封件时，每一密封件的材料可以相同或者不同。According to a preferred embodiment of the present invention, when a plurality of seal members are respectively disposed at both ends of the same battery unit, the materials of each seal member may be the same or different.
根据本发明一优选实施例，每一电池单元均包括阳极板、阴极板以及设于所述阴极板和所述阳极板之间的绝缘隔板。In accordance with a preferred embodiment of the present invention, each of the battery cells includes an anode plate, a cathode plate, and an insulating spacer disposed between the cathode plate and the anode plate.
根据本发明一优选实施例，相邻电池单元的相邻金属板分离区域部之间设有弹性支撑体。According to a preferred embodiment of the present invention, an elastic support body is disposed between adjacent metal plate separation region portions of adjacent battery cells.
根据本发明一优选实施例，所述电池组还包括设在相邻电池单元的相邻金属板分离区域之间的电路板。In accordance with a preferred embodiment of the present invention, the battery pack further includes a circuit board disposed between adjacent metal plate separation regions of adjacent battery cells.
根据本发明一优选实施例，同一电池单元两金属板的分离区域外周还贴设有密封胶带。According to a preferred embodiment of the present invention, a sealing tape is attached to the outer periphery of the separation region of the two metal plates of the same battery unit.
为解决上述技术问题，本发明还提供一种电池组组装方法，所述组装方法包括：In order to solve the above technical problem, the present invention also provides a battery assembly method, the assembly method comprising:
生成多个电池单元，其中所述电池单元的外壳包括上金属板和下金属板，所述上金属板和下金属板之间设置有密封件；Generating a plurality of battery cells, wherein the outer casing of the battery unit comprises an upper metal plate and a lower metal plate, and a sealing member is disposed between the upper metal plate and the lower metal plate;
将多个所述电池单元堆叠设置，并使相邻的电池单元的金属板部分的导电连接在一起，以形成电池组；Stacking a plurality of the battery cells, and electrically connecting the metal plate portions of adjacent battery cells together to form a battery pack;
其中，所述上金属板和/或所述下金属板包括连接区域和分离区域，所述分离区域包括一向电池单元内侧弯曲的弧形段，所述弧形段的厚度减薄。Wherein the upper metal plate and/or the lower metal plate comprises a connection region and a separation region, the separation region comprising an arc segment curved toward the inner side of the battery unit, the thickness of the arc segment being thinned.
根据本发明一优选实施例，所述生成多个电池单元的步骤具体包括：According to a preferred embodiment of the present invention, the step of generating a plurality of battery units specifically includes:
在绝缘隔板上、下表面分别贴合阳极板和阴极板，以形成电池内芯；An anode plate and a cathode plate are respectively attached to the upper and lower surfaces of the insulating spacer to form a battery inner core;
在上、下金属板相对侧的端部分别贴设密封材料；a sealing material is respectively attached to the opposite ends of the upper and lower metal plates;
将所述电池内芯压合在金属板内，以形成电池单元；其中，上、下金属板通过密封材料贴合在一起，并形成密封容置腔体，所述电池内芯设于所述密封容置腔体内。Pressing the battery inner core into a metal plate to form a battery unit; wherein the upper and lower metal plates are bonded together by a sealing material and forming a sealed receiving cavity, wherein the battery inner core is disposed on the battery The seal is housed in the cavity.
根据本发明一优选实施例，其特征在于，所述连接区域和所述分离区域为一体结构。According to a preferred embodiment of the invention, the connection region and the separation region are of unitary structure.
根据本发明一优选实施例，所述分离区域设于金属板的一端或者两端。According to a preferred embodiment of the invention, the separation region is provided at one or both ends of the metal plate.
根据本发明一优选实施例，所述密封材料为弹性材料。According to a preferred embodiment of the invention, the sealing material is an elastic material.
根据本发明一优选实施例，在上、下金属板相对侧的端部分别贴设密封材料的步骤中，可以在上、下金属板相对侧的端部分别贴设多处密封材料，且每种密封材料不相同，靠近电池单元内侧密封材料的弹性系数大于靠近电池单元外侧密封材料的弹性系数。According to a preferred embodiment of the present invention, in the step of respectively applying the sealing materials on the opposite ends of the upper and lower metal plates, a plurality of sealing materials may be respectively attached to the opposite ends of the upper and lower metal plates, and each The sealing material is different, and the elastic modulus of the sealing material near the inner side of the battery unit is greater than the elastic modulus of the sealing material near the outer side of the battery unit.
根据本发明一优选实施例，所述方法还包括在相邻电池单元的相邻金属板分离区域之间设置弹性支撑体。According to a preferred embodiment of the invention, the method further comprises providing an elastic support between adjacent metal plate separation regions of adjacent battery cells.
根据本发明一优选实施例，所述方法进一步包括在相邻电池单元的相邻金属板分离区域之间设置电路板。According to a preferred embodiment of the invention, the method further comprises disposing a circuit board between adjacent metal plate separation regions of adjacent battery cells.
根据本发明一优选实施例，所述方法还包括在同一电池单元两金属板分离区域外周贴设密封胶带。According to a preferred embodiment of the present invention, the method further includes applying a sealing tape on the outer periphery of the two metal plate separation regions of the same battery unit.
相对于现有技术，本发明提供的电池组及其组装方法，通过在电池单元外壳端部设置分离区域，并在分离区域上设置向电池单元内侧弯曲的弧形段，当电池单元发生膨胀时，该分离区域以及弧形段（弧形段向外膨胀弯折）可以起到缓冲或消除由于膨胀带来的电池单元体积变大的问题，另外在电池单元的端部设置弹性密封元件，当电池单元发生膨胀时，弹性密封元件会发生弹性形变，同样可以起到电池单元膨胀安全防护的作用。Compared with the prior art, the battery pack and the assembling method thereof are provided by providing a separation area at the end of the battery unit casing and providing an arc segment bent toward the inner side of the battery unit on the separation area, when the battery unit expands The separation area and the curved section (the curved section is outwardly expanded and bent) can buffer or eliminate the problem that the volume of the battery unit due to expansion becomes large, and an elastic sealing element is disposed at the end of the battery unit. When the battery unit expands, the elastic sealing element will elastically deform, which can also play the role of battery unit expansion safety protection.
【附图说明】 [Description of the Drawings]
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例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发明的一些实施例，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附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.
图1是现有技术中一种常用的双极电池的结构示意简图；1 is a schematic structural diagram of a conventional bipolar battery in the prior art;
图2是本发明电池组第一实施例的结构示意图；2 is a schematic structural view of a first embodiment of a battery pack of the present invention;
图3是电池单元第一实施例的结构图；Figure 3 is a structural view of a first embodiment of a battery unit;
图4是本发明电池组第二实施例的结构示意图；4 is a schematic structural view of a second embodiment of the battery pack of the present invention;
图5是电池单元第二实施例的结构图；Figure 5 is a structural view of a second embodiment of the battery unit;
图6是电池单元第三实施例的结构图；Figure 6 is a structural view of a third embodiment of the battery unit;
图7是图6实施例中第一密封件121发生形变的示意图；Figure 7 is a schematic view showing the deformation of the first sealing member 121 in the embodiment of Figure 6;
图8是本发明电池组第三实施例的结构示意图；Figure 8 is a schematic structural view of a third embodiment of the battery pack of the present invention;
图9是电池单元第四实施例的结构图；Figure 9 is a structural view of a fourth embodiment of a battery unit;
图10是图9实施例中电池单元弧形段发生形变的示意图；Figure 10 is a schematic view showing the deformation of the arc segment of the battery unit in the embodiment of Figure 9;
图11是本发明电池组第四实施例的结构示意图；Figure 11 is a schematic structural view of a fourth embodiment of the battery pack of the present invention;
图12是本发明电池组第七实施例的结构示意图；Figure 12 is a schematic structural view of a seventh embodiment of the battery pack of the present invention;
图13是图12实施例中电池组结构变形实施例的示意图；Figure 13 is a schematic view showing a modified embodiment of the battery pack structure in the embodiment of Figure 12;
图14是图12实施例中电池组结构另一种变形实施例的示意图；Figure 14 is a schematic view showing another modified embodiment of the battery pack structure in the embodiment of Figure 12;
图15是本发明电池组组装方法第一实施例的流程示意图；15 is a schematic flow chart of a first embodiment of a method for assembling a battery pack of the present invention;
图16是金属板制作过程的示意图；Figure 16 is a schematic view showing a metal plate manufacturing process;
图17是金属板设置密封材料的示意图；Figure 17 is a schematic view showing a sealing material of a metal plate;
图18是第一方法实施例中将电池内芯压合在金属板内的结构示意图；Figure 18 is a schematic view showing the structure of a battery core in a metal plate in the first method embodiment;
图19是本发明电池组组装方法第二实施例的流程示意图；19 is a schematic flow chart of a second embodiment of a method for assembling a battery pack of the present invention;
图20是第二方法实施例中将电池内芯压合在金属板内的第一结构示意图；20 is a first structural schematic view showing a method of pressing a battery inner core into a metal plate in a second method embodiment;
图21是第二方法实施例中将电池内芯压合在金属板内的第二结构示意图；21 is a second schematic structural view of a second method embodiment for pressing a battery inner core into a metal plate;
图22是第二方法实施例中将电池内芯压合在金属板内的第三结构示意图以及22 is a third structural schematic view showing a method of pressing a battery inner core into a metal plate in a second method embodiment;
图23是第二方法实施例中将电池内芯压合在金属板内的第四结构示意图。Figure 23 is a fourth structural view showing the second embodiment of the battery core being pressed into the metal plate.
【具体实施方式】【detailed description】
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
实施例1Example 1
请参阅图2，图2是本发明电池组第一实施例的结构示意图；该实施例中的电池组包括5个电池单元（A、B、C、D、E），当然，在其他实施例中，电池单元的数量并不限于5个，可以为2个、3个、4个、6个……或多个。具体数量取决于电池的的输出电压要求。多个电池单元串联可以组成一个具有指定的输出电压的电池组。Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of a first embodiment of a battery pack according to the present invention; the battery pack in the embodiment includes five battery units (A, B, C, D, E), of course, in other embodiments. The number of battery cells is not limited to five, and may be two, three, four, six, or more. The exact amount depends on the output voltage requirements of the battery. A plurality of battery cells connected in series may constitute a battery pack having a specified output voltage.
电池组的外侧为上、下端板（11、22），上、下端板（11、22）可以是金属集电板，其作用是起到导电和外部支撑的作用，因此需要具备导电作用且具有一定的机械强度。另外，上、下端板（11、22）还可以是支撑板，用于形成电池组的外壳。上、下端板（11、22）可以在电池组壳内部提供金属支撑。上、下端板（11、22）还可以作为电池组的外部正极和负极。The outer side of the battery pack is the upper and lower end plates (11, 22), and the upper and lower end plates (11, 22) may be metal current collecting plates, which function as conductive and external support, and therefore need to have electrical conductivity and have A certain mechanical strength. In addition, the upper and lower end plates (11, 22) may also be support plates for forming the outer casing of the battery pack. The upper and lower end plates (11, 22) can provide metal support inside the battery case. The upper and lower end plates (11, 22) can also serve as external positive and negative electrodes of the battery pack.
请参阅图3，图3是电池单元第一实施例的结构图，每一电池单元的两侧均设有上金属板和下金属板110，相邻电池单元的金属板部分的导电连接在一起，即上一个电池单元的下金属板和下一个电池单元的上金属板部分的导电连接在一起。基于相邻电池单元之间的部分导电连接，，每一金属板110可被划分为连接区域111和分离区域112，其中，连接区域111即是金属板与相邻电池单元的金属板实现导电连接的区域，分离区域即是金属板与相邻电池单元的金属板实现分离的区域。在该实施例中，分离区域112设于金属板110的一端，另一端是连接区域111直接连接在一起，优选地，连接区域111和分离区域112为一体结构，可以采用同一金属片材冲压制成。Please refer to FIG. 3. FIG. 3 is a structural diagram of a first embodiment of a battery unit. Both sides of each battery unit are provided with an upper metal plate and a lower metal plate 110. The metal plate portions of adjacent battery cells are electrically connected together. That is, the lower metal plate of the previous battery unit and the upper metal plate portion of the next battery unit are electrically connected together. Each of the metal plates 110 may be divided into a connection region 111 and a separation region 112 based on a partial conductive connection between adjacent battery cells, wherein the connection region 111 is a metal plate and a metal plate of an adjacent battery cell is electrically connected. The area, the separation area is the area where the metal plate is separated from the metal plate of the adjacent battery unit. In this embodiment, the separation region 112 is disposed at one end of the metal plate 110, and the other end is the connection region 111 directly connected together. Preferably, the connection region 111 and the separation region 112 are integrally formed, and can be stamped by the same metal sheet. to make.
优选地，相邻电池单元的相邻金属板之间采用固定连接的方式。在该实施例中，相邻电池单元的相邻金属板连接区域111之间为直接的紧靠连接，当然，在其他实施例中，相邻电池单元的相邻金属板连接区域111之间也可以是通过导电物质进行间接连接的。相邻电池单元的相邻金属板连接区域111可以是被压制在一起的，或者焊接在一起，或者使用导电粘合剂粘合在一起等。Preferably, a fixed connection is adopted between adjacent metal plates of adjacent battery cells. In this embodiment, adjacent metal plate connection regions 111 of adjacent battery cells are directly abutting connections, of course, in other embodiments, adjacent metal plate connection regions 111 of adjacent battery cells are also It may be indirectly connected by a conductive substance. Adjacent metal plate connection regions 111 of adjacent battery cells may be pressed together, or welded together, or bonded together using a conductive adhesive or the like.
请继续参阅图2，在该实施例中，相邻电池单元的相邻金属板分离区域112之间是分离的，形成间隙505。该种结构可以在电池单元发生膨胀或者受到挤压时，分离区域112处形成的间隙505受压收缩，可以抵消或缓解电池单元金属板的形变。分离区域112处间隙505相当于缓冲室式的安全防护结构，可以有效防止电池单元受到破坏。保证电池组结构的稳定性。With continued reference to FIG. 2, in this embodiment, adjacent metal plate separation regions 112 of adjacent battery cells are separated to form a gap 505. Such a structure can be pressed and contracted at the gap 505 formed at the separation region 112 when the battery unit is expanded or squeezed, and can cancel or alleviate the deformation of the battery unit metal plate. The gap 505 at the separation region 112 corresponds to a buffer-type safety protection structure, which can effectively prevent the battery unit from being damaged. Ensure the stability of the battery pack structure.
为了提供良好的缓冲性能，间隙505的空间不能过小，优选的，间隙505的宽度L至少为电池单元厚度的20%，更优选的，间隙505的宽度L至少为电池单元厚度的40%，本领域技术人员还可根据实际需要设置间隙505的宽度L的数值，当然处于电池容量的考虑，间隙505也不能设置的过大。In order to provide good cushioning performance, the space of the gap 505 should not be too small. Preferably, the width L of the gap 505 is at least 20% of the thickness of the battery unit, and more preferably, the width L of the gap 505 is at least 40% of the thickness of the battery unit. Those skilled in the art can also set the value of the width L of the gap 505 according to actual needs. Of course, in consideration of the battery capacity, the gap 505 cannot be set too large.
每一电池单元均包括阳极板131、阴极板132以及设于阴极板132和阳极板131之间的绝缘隔板133。相邻电池单元之间的阴阳极板交替排列。电池单元内部的腔体134用于容置电解质。Each of the battery cells includes an anode plate 131, a cathode plate 132, and an insulating separator 133 disposed between the cathode plate 132 and the anode plate 131. The anode and cathode plates between adjacent battery cells are alternately arranged. A cavity 134 inside the battery unit is used to house the electrolyte.
相邻电池单元的相邻金属板优选为不同的材料制成。贴近阳极板131的金属板可以基于阳极的电势来进行选择，例如铜或者其他材料。而贴近阴极板132的金属板可以基于阴极的电势来进行选择，例如铝或其它材料。换句话说，贴近不同极板的金属板可基于阴、阳极的电势要求来选择材料。Adjacent metal sheets of adjacent battery cells are preferably made of different materials. The metal plate adjacent to the anode plate 131 can be selected based on the potential of the anode, such as copper or other materials. The metal plate adjacent to the cathode plate 132 can be selected based on the potential of the cathode, such as aluminum or other materials. In other words, metal plates that are close to different plates can be selected based on the potential requirements of the cathode and anode.
而关于阳极板131和阴极板132的材料则可以是任何合适的电池材料。例如，阳极板131材料可以是锡、锂、钙等的合金或者氧化物，还可以为硅、石墨等其它能够作为电池阳极的材料。而阴极板132的材料可以是锂的氧化物以及钴酸锂、 碳酸锂等等，在本领域技术人员的理解范围内，此处不再一一列举。The material for the anode plate 131 and the cathode plate 132 may be any suitable battery material. For example, the material of the anode plate 131 may be an alloy or an oxide of tin, lithium, calcium, or the like, or may be other materials capable of functioning as an anode of a battery such as silicon or graphite. The material of the cathode plate 132 may be an oxide of lithium and lithium cobaltate. Lithium carbonate and the like are within the scope of those skilled in the art and will not be enumerated here.
金属板110的厚度优选为2-100微米，在该范围内一方面可以满足金属板110弯折加工的要求，另一方面还可以满足电池单元密封性强度的要求。进一步优选地，该金属板110的厚度可以在5-80微米之间。The thickness of the metal plate 110 is preferably 2 to 100 μm, and on the one hand, the requirements for the bending process of the metal plate 110 can be satisfied, and on the other hand, the sealing strength of the battery unit can be satisfied. Further preferably, the metal plate 110 may have a thickness of between 5 and 80 microns.
同一电池单元两金属板的分离区域112之间设有密封件120，能够使同一电池单元两相邻金属板密封结合以防止电解质渗出。电解质可以是固体的、胶体的或者液体的。密封件120能够通过相邻电池单元之间的密封来实现电化学隔离。在保证密封时效的情况下，密封件120的材料可以是具备金属层之间良好粘接性以及具有良好弹性的任意材料，譬如复合材料，包括橡胶-石棉、气凝胶毡-聚氨酯等；橡胶类材料或者塑料等。A sealing member 120 is disposed between the separation regions 112 of the two metal plates of the same battery unit, so that two adjacent metal plates of the same battery unit can be sealingly combined to prevent electrolyte leakage. The electrolyte can be solid, colloidal or liquid. The seal 120 is capable of electrochemical isolation by sealing between adjacent battery cells. In the case of ensuring sealing aging, the material of the sealing member 120 may be any material having good adhesion between metal layers and having good elasticity, such as composite materials, including rubber-asbestos, aerogel felt-polyurethane, etc.; rubber Class materials or plastics, etc.
实施例2Example 2
需要说明的是，后续实施例中，将只着重介绍与实施例1中结构不同之处，而相同或者相似的结构特征，将不再详述。It should be noted that, in the following embodiments, only the differences from the structure in Embodiment 1 will be emphasized, and the same or similar structural features will not be described in detail.
请参阅图4，图4是本发明电池组第二实施例的结构示意图，该实施例中的电池组同样是包括A、B、C、D、E 5个电池单元，与上一实施例的区别在于，该实施例中电池单元金属板两端都设有分离区域，且同一电池单元两金属板的分离区域之间均设有密封件，该种结构可以在分离区域之间形成更多的间隙505，因此进一步提高了电池单元的耐膨胀系数，相较于实施例1中的结构提高了一倍。Please refer to FIG. 4. FIG. 4 is a schematic structural view of a second embodiment of the battery pack of the present invention. The battery pack in the embodiment also includes A, B, C, D, and E. The difference between the five battery cells and the previous embodiment is that in the embodiment, the battery unit has a separation area at both ends, and a sealing member is disposed between the separation regions of the two metal plates of the same battery unit. The structure can form more gaps 505 between the separation regions, thus further increasing the coefficient of expansion of the battery cells, which is doubled compared to the structure in Embodiment 1.
请参阅图5，图5是电池单元第二实施例的结构图，为了提高密封效果，密封件120的结构并不限于实施例中的结构，还可以为延伸到电池单元腔体内部的结构形式。进一步，请参阅图6，图6是电池单元第三实施例的结构图，该实施例中，同一电池单元两金属板同一端的分离区域之间设有多个密封件，且当同一电池单元两金属板同一端的分离区域之间设置多个密封件时，每一密封件的材料可以相同或者不同。Please refer to FIG. 5. FIG. 5 is a structural diagram of a second embodiment of the battery unit. In order to improve the sealing effect, the structure of the sealing member 120 is not limited to the structure in the embodiment, and may be a structural form extending to the inside of the battery unit cavity. . Further, please refer to FIG. 6. FIG. 6 is a structural diagram of a third embodiment of the battery unit. In this embodiment, a plurality of sealing members are disposed between the separated ends of the same end of the two metal plates of the same battery unit, and when the same battery unit is When a plurality of seals are disposed between the separated regions at the same end of the metal plate, the material of each seal may be the same or different.
本实施例中密封件数量优选为两个，即图中第一密封件121和第二密封件122，其中，第一密封件121位于靠近电池单元内侧，第二密封件122位于靠近电池单元外侧，其中，靠近电池单元内侧第一密封件121的材料弹性系数大于靠近电池单元外侧第二密封件122的材料弹性系数，更优选地，第一密封件121的厚度小于第二密封件122的厚度，目的是为了使当电池单元发生膨胀或者受到挤压时，第一第二密封件可以双层密封，使得密封更加可靠，并且第一密封件121更容易发生变形，这样的话可以抵消或缓解电池单元金属板的形变。请一并参阅图7，图7是图6实施例中第一密封件121发生形变的示意图，图中虚线表示第一密封件121发生形变后的情况。The number of the sealing members in the embodiment is preferably two, that is, the first sealing member 121 and the second sealing member 122 in the figure, wherein the first sealing member 121 is located near the inner side of the battery unit, and the second sealing member 122 is located near the outer side of the battery unit. Wherein, the material elastic modulus of the first sealing member 121 near the inner side of the battery unit is greater than the material elastic modulus of the second sealing member 122 adjacent to the outer side of the battery unit, and more preferably, the thickness of the first sealing member 121 is smaller than the thickness of the second sealing member 122. The purpose is to enable the first and second sealing members to be double-sealed when the battery unit is expanded or squeezed, so that the sealing is more reliable, and the first sealing member 121 is more susceptible to deformation, so that the battery can be offset or relieved. The deformation of the unit metal plate. Please refer to FIG. 7. FIG. 7 is a schematic view showing the deformation of the first sealing member 121 in the embodiment of FIG. 6. The broken line in the figure indicates the deformation of the first sealing member 121.
实施例3Example 3
请参阅图8，图8是本发明电池组第三实施例的结构示意图，相较于实施例1而言，该实施例中相邻电池单元的相邻金属板同一端分离区域之间设有弹性支撑体506，即相当于将弹性支撑体填充到了原来间隙505的位置，弹性支撑体506的弹性可以增强电池组堆叠方向的延伸性。弹性支撑体506可以使用任何合适的材料。例如硅橡胶、三元乙丙橡胶、聚乙烯以及聚氯乙烯等具有如下特性的材料：绝缘性好，能够与电解质共存可以在电压10伏以下以及200度以下稳定等。优选地，弹性支撑体在电池单元的堆叠方向上至少可以弹性形变增加15%或者更大。Referring to FIG. 8, FIG. 8 is a schematic structural view of a third embodiment of a battery pack according to the present invention. Compared with the first embodiment, adjacent ones of adjacent battery cells of the adjacent battery cells are disposed at the same end separation region. The elastic support body 506 corresponds to a position where the elastic support body is filled to the original gap 505, and the elasticity of the elastic support body 506 can enhance the extension of the stacking direction of the battery pack. The elastic support 506 can use any suitable material. For example, a material having the following properties such as silicone rubber, ethylene propylene diene monomer, polyethylene, and polyvinyl chloride is excellent in insulation, and can coexist with an electrolyte and can be stabilized at a voltage of 10 volts or less and 200 degrees or less. Preferably, the elastic support body is at least elastically deformable by 15% or more in the stacking direction of the battery cells.
请一并参阅图9和图10，图9是电池单元第四实施例的结构图，图10是图9实施例中电池单元弧形段发生形变的示意图，该实施例与实施例1中电池单元结构的区别在于，分离区域112包括一向电池单元内侧弯曲的弧形段1102，当电池单元发生膨胀或者受到挤压时，该弧形段1102向外突出，以抵消或缓解电池单元金属板的形变。9 and FIG. 10, FIG. 9 is a structural view of a fourth embodiment of the battery unit, and FIG. 10 is a schematic view showing deformation of the arc segment of the battery unit in the embodiment of FIG. 9. The battery of the embodiment and the embodiment 1 The unit structure is different in that the separation region 112 includes an arc segment 1102 bent toward the inner side of the battery unit. When the battery unit expands or is squeezed, the arc segment 1102 protrudes outward to offset or relieve the metal plate of the battery unit. deformation.
优选地，该连接区域111和分离区域112为一体结构，其中，弧形段1102的材料厚度小于分离区域112其他部分材料以及连接区域111材料的厚度，或者弧形段1102的厚度小于连接区域111和分离区域112其他部分中的一者，之所以设计弧形段1102的材料厚度更小一些，主要是考虑在电池单元发生膨胀或者受到挤压时，弧形段1102由于材料厚度小于与其相邻的连接区域111和分离区域112，可以更容易的发生形变，而使连接区域111、分离区域112以及电池单元其他部分结构保持结构稳定，避免电池单元发生损坏。图10中虚线表示弧形段1102发生形变的情况。Preferably, the connection region 111 and the separation region 112 are a unitary structure, wherein the material thickness of the arc segment 1102 is smaller than the thickness of the other portion of the separation region 112 and the material of the connection region 111, or the thickness of the arc segment 1102 is smaller than the connection region 111. And one of the other portions of the separation region 112, the thickness of the material of the curved segment 1102 is designed to be smaller, mainly considering that the arc segment 1102 is less than the adjacent material when the cell is expanded or squeezed. The connection region 111 and the separation region 112 can be more easily deformed, and the connection region 111, the separation region 112, and other portions of the battery unit are structurally stabilized to prevent damage of the battery unit. The broken line in Fig. 10 indicates the case where the curved segment 1102 is deformed.
举例来说，金属板在弧形段1102的材料厚度可比连接区域111和/或分离区域112的厚度减薄10%-50%，例如可以减薄20%、25%、30%、40%等。For example, the material thickness of the metal plate in the curved segment 1102 can be reduced by 10%-50% compared to the thickness of the connection region 111 and/or the separation region 112, for example, 20%, 25%, 30%, 40%, etc. can be thinned. .
实施例4Example 4
请参阅图11，图11是本发明电池组第四实施例的结构示意图，从该实施例的图中可以看到，相较于实施例1的结构来说，在相邻电池单元之间设置了导电块88，具体为在相邻电池单元的相邻金属板连接区域之间设有间隙801并通过导电块88连接在一起。Referring to FIG. 11, FIG. 11 is a schematic structural view of a fourth embodiment of the battery pack of the present invention. As can be seen from the figure of the embodiment, the structure is set between adjacent battery cells compared to the structure of the first embodiment. The conductive blocks 88 are specifically provided with gaps 801 between adjacent metal plate connection regions of adjacent battery cells and connected together by the conductive blocks 88.
其中，该导电块88的材料优选为软质材料制成，譬如铝、钛合金等等。优选软质材料的好处是，在电池单元发生膨胀或者受到挤压时，导电块88一方面起到导电连接相邻金属板的作用，另一方面还可以发生一定的形变，使电池单元除了在分离区域112处可以发生形变之外，还可以在连接区域111位置处发生形变。The material of the conductive block 88 is preferably made of a soft material such as aluminum, titanium alloy or the like. Preferably, the soft material has the advantage that, when the battery unit expands or is squeezed, the conductive block 88 functions to electrically connect adjacent metal plates on the one hand, and can also undergo a certain deformation on the other hand, so that the battery unit is In addition to the deformation at the separation region 112, deformation can also occur at the location of the connection region 111.
实施例5Example 5
请参阅图12，图12是本发明电池组第五实施例的结构示意图，该实施例中，电池组还包括设在相邻电池单元的相邻金属板同一端分离区域之间的电路板150。电路板150用于电池组平衡、热管理或者其他可能的功能等。将电路板150设在电池组内部的好处是可以充分利用电池组内部空间，减少导线的数量和长度，不必将电极的导线延伸到电池组壳体（图中未示）的外部，从而增强电池组整体的密封性。为了进一步利用电池组内部空间，优选地将电路板150设置在分离区域的同一侧或者是电池组的同一侧。Referring to FIG. 12, FIG. 12 is a schematic structural view of a fifth embodiment of a battery pack according to the present invention. In this embodiment, the battery pack further includes a circuit board 150 disposed between the adjacent end regions of adjacent metal plates of adjacent battery cells. . Circuit board 150 is used for battery pack balancing, thermal management, or other possible functions. The advantage of providing the circuit board 150 inside the battery pack is that the internal space of the battery pack can be fully utilized, and the number and length of the wires can be reduced without extending the wires of the electrodes to the outside of the battery pack case (not shown), thereby enhancing the battery. The overall sealing of the group. In order to further utilize the internal space of the battery pack, the circuit board 150 is preferably disposed on the same side of the separation area or on the same side of the battery pack.
请一并参阅图13，图13是图12实施例中电池组结构变形实施例的示意图，为了使电路板150可以得到保护，也是为了进一步增强密封件120的密封性，在同一电池单元两金属板的同一端分离区域外周还贴设有密封胶带160。密封胶带160的材料可以为陶瓷或聚合物等材料。密封胶带160的作用包括防止电路板150短路，提供更好的化学或电化学稳定性以及提供电池单元更好的机械强度等。Referring to FIG. 13 together, FIG. 13 is a schematic diagram showing a modified embodiment of the battery pack structure in the embodiment of FIG. 12. In order to protect the circuit board 150, it is also to further enhance the sealing property of the sealing member 120. A sealing tape 160 is also attached to the outer periphery of the separation portion of the same end of the plate. The material of the sealing tape 160 may be a material such as ceramic or polymer. The function of the sealing tape 160 includes preventing the circuit board 150 from being short-circuited, providing better chemical or electrochemical stability, and providing better mechanical strength of the battery unit and the like.
另外，在结合实施例2的基础上，请参阅图14，图14是图12实施例中电池组结构另一种变形实施例的示意图，在该实施例想说明的是，密封胶带160并不是一定与电路板150一起设置的，当然还可以单独设置密封胶带160在电池单元分离区域外周，如图14中所示。In addition, referring to FIG. 14, FIG. 14 is a schematic view showing another modified embodiment of the battery pack structure in the embodiment of FIG. 12, in which the sealing tape 160 is not It must be provided together with the circuit board 150, and of course, the sealing tape 160 may be separately provided on the outer periphery of the battery cell separation region as shown in FIG.
上述实施例中的电池组，电池单元分别设置了不同的安全防护结构，包括分离区域处设置间隙、弹性支撑体，在金属板的连接区域和分离区域之间设置弧形段等，都可以起到当电池单元发生膨胀或者受到挤压时，抵消或缓解电池单元金属板的形变的作用，另外，还将电路板设置在电池组内部来提高电池组空间利用率，并通过设置密封胶带来增强保护及密封性能。In the battery pack of the above embodiment, the battery units are respectively provided with different safety protection structures, including a gap at the separation area, an elastic support body, and an arc segment between the connection area of the metal plate and the separation area, etc. To counteract or alleviate the deformation of the battery unit metal plate when the battery unit expands or is squeezed. In addition, the circuit board is placed inside the battery pack to improve battery space utilization and is enhanced by providing sealing tape. Protection and sealing performance.
以上实施例是对电池单元以及电池组整体结构的描述，上述各实施例中的技术特征在经过不同的组合后，当然还可以延伸出更多的实施例，在本领域技术人员没有经过创造性劳动，而只是以本发明中技术特征的简单组合也应该在本发明的保护范围之内。The above embodiment is a description of the overall structure of the battery unit and the battery pack. The technical features in the above embodiments may, after different combinations, further extend more embodiments, and the skilled person does not have to work creatively. However, a simple combination of the technical features of the present invention should also be within the scope of the present invention.
方法实施例1Method embodiment 1
另外，本发明还提供电池组的组装方法实施例，请参阅图15，图15是本发明电池组组装方法第一实施例的流程示意图，该方法包括但不限于以下步骤。In addition, the present invention also provides an embodiment of a method for assembling a battery pack. Referring to FIG. 15, FIG. 15 is a schematic flow chart of a first embodiment of a method for assembling a battery pack according to the present invention, which includes, but is not limited to, the following steps.
步骤S100，生成多个电池单元，其中电池单元的外壳包括上金属板和下金属板，上金属板和下金属板之间设置有密封件。Step S100, generating a plurality of battery cells, wherein the outer casing of the battery unit comprises an upper metal plate and a lower metal plate, and a sealing member is disposed between the upper metal plate and the lower metal plate.
步骤S110，将多个电池单元堆叠设置，并使相邻的电池单元的金属板部分的导电连接在一起，以形成电池组。In step S110, a plurality of battery cells are stacked and electrically connected together of the metal plate portions of the adjacent battery cells to form a battery pack.
在步骤S100生成多个电池单元的步骤中，还具体包括如下过程，首先在绝缘隔板上、下表面分别贴合阳极板和阴极板，以形成电池内芯；然后在上、下金属板相对侧的端部分别贴设密封材料；以及将电池内芯压合在金属板内，以形成电池单元；其中，上、下金属板通过密封材料贴合在一起，并形成密封容置腔体，电池内芯设于密封容置腔体内。In the step of generating a plurality of battery cells in step S100, the method further includes the following steps: firstly, an anode plate and a cathode plate are respectively attached to the upper and lower surfaces of the insulating spacer to form a battery inner core; and then the upper and lower metal plates are oppositely The end portions of the side are respectively attached with a sealing material; and the battery core is pressed into the metal plate to form a battery unit; wherein the upper and lower metal plates are bonded together by the sealing material, and a sealed receiving cavity is formed. The battery core is disposed in the sealed receiving cavity.
请参阅图16，图16是金属板制作过程的示意图，在该步骤中，首先要制作金属板，可以将金属板110先压制出连接区域111和分离区域112，然后将两块金属板通过连接区域111相互固定连接，其中需要保证相邻金属板分离区域112之间的间隙大于连接区域111之间的间隙，形成图中所示的结构。该结构一般被称作双极板，相邻电池单元的相邻金属板之间采用固定连接的方式。在该实施例中，相邻电池单元的相邻金属板连接区域111之间为直接的紧靠连接，当然，在其他实施例中，相邻电池单元的相邻金属板连接区域111之间也可以是通过导电物质进行间接连接的。相邻电池单元的相邻金属板连接区域111可以是被压制在一起的，或者焊接在一起，或者使用导电粘合剂粘合在一起等。相邻电池单元的相邻金属板分离区域112之间是分离的，形成间隙。该种结构可以在电池单元发生膨胀或者受到挤压时，分离区域112处形成的间隙受压收缩，可以抵消或缓解电池单元金属板的形变。分离区域112处间隙相当于缓冲室式的安全防护结构，可以有效防止电池单元受到破坏，保证电池组结构的稳定性。Please refer to FIG. 16. FIG. 16 is a schematic diagram of a metal plate manufacturing process. In this step, a metal plate is first formed, and the metal plate 110 can be first pressed out of the connection region 111 and the separation region 112, and then the two metal plates are connected. The regions 111 are fixedly connected to each other in which it is necessary to ensure that the gap between the adjacent metal plate separation regions 112 is larger than the gap between the connection regions 111, forming the structure shown in the drawing. This structure is generally referred to as a bipolar plate, and a fixed connection between adjacent metal plates of adjacent battery cells is employed. In this embodiment, adjacent metal plate connection regions 111 of adjacent battery cells are directly abutting connections, of course, in other embodiments, adjacent metal plate connection regions 111 of adjacent battery cells are also It may be indirectly connected by a conductive substance. Adjacent metal plate connection regions 111 of adjacent battery cells may be pressed together, or welded together, or bonded together using a conductive adhesive or the like. Adjacent metal plate separation regions 112 of adjacent battery cells are separated to form a gap. Such a structure can compress and contract the gap formed at the separation region 112 when the battery cell expands or is squeezed, and can cancel or alleviate the deformation of the battery unit metal plate. The gap at the separation area 112 is equivalent to a buffer type safety protection structure, which can effectively prevent the battery unit from being damaged and ensure the stability of the battery pack structure.
相邻电池单元的相邻金属板优选为不同的材料制成。贴近阳极板131的金属板可以基于阳极的电势来进行选择，例如铜或者其他材料。而贴近阴极板132的金属板可以基于阴极的电势来进行选择，例如铝或其它材料。换句话说，贴近不同极板的金属板可基于阴、阳极的电势要求来选择材料。Adjacent metal sheets of adjacent battery cells are preferably made of different materials. The metal plate adjacent to the anode plate 131 can be selected based on the potential of the anode, such as copper or other materials. The metal plate adjacent to the cathode plate 132 can be selected based on the potential of the cathode, such as aluminum or other materials. In other words, metal plates that are close to different plates can be selected based on the potential requirements of the cathode and anode.
而关于阳极板131和阴极板132的材料则可以是任何合适的电池材料。例如，阳极板131材料可以是锡、锂、钙等的合金或者氧化物，还可以为硅、石墨等其它能够作为电池阳极的材料。而阴极板132的材料可以是锂的氧化物以及钴酸锂、 碳酸锂等等，在本领域技术人员的理解范围内，此处不再一一列举。The material for the anode plate 131 and the cathode plate 132 may be any suitable battery material. For example, the material of the anode plate 131 may be an alloy or an oxide of tin, lithium, calcium, or the like, or may be other materials capable of functioning as an anode of a battery such as silicon or graphite. The material of the cathode plate 132 may be an oxide of lithium and lithium cobaltate. Lithium carbonate and the like are within the scope of those skilled in the art and will not be enumerated here.
金属板110的厚度优选为2-100微米，在该范围内一方面可以满足金属板110弯折加工的要求，另一方面还可以满足电池单元密封性强度的要求。进一步优选地，该金属板110的厚度可以在5-80微米之间。The thickness of the metal plate 110 is preferably 2 to 100 μm, and on the one hand, the requirements for the bending process of the metal plate 110 can be satisfied, and on the other hand, the sealing strength of the battery unit can be satisfied. Further preferably, the metal plate 110 may have a thickness of between 5 and 80 microns.
请继续参阅图17，图17是金属板设置密封材料的示意图，将制作好的金属板相对侧的端部分别贴设密封材料1205。同一电池单元两金属板的分离区域112之间设有密封件120，能够使同一电池单元两相邻金属板密封结合以防止电解质渗出。电解质可以是固体的、胶体的或者液体的。密封件120能够通过相邻电池单元之间的密封来实现电化学隔离。在保证密封时效的情况下，密封件120的材料可以是具备金属层之间良好粘接性以及具有良好弹性的任意材料，譬如复合材料，包括橡胶-石棉、气凝胶毡-聚氨酯等；橡胶类材料或者塑料等。请一并参阅图18，图18是第一方法实施例中将电池内芯压合在金属板内的结构示意图。Please refer to FIG. 17. FIG. 17 is a schematic view showing the sealing material of the metal plate, and the sealing material 1205 is respectively attached to the opposite ends of the prepared metal plate. A sealing member 120 is disposed between the separation regions 112 of the two metal plates of the same battery unit, so that two adjacent metal plates of the same battery unit can be sealingly combined to prevent electrolyte leakage. The electrolyte can be solid, colloidal or liquid. The seal 120 is capable of electrochemical isolation by sealing between adjacent battery cells. In the case of ensuring sealing aging, the material of the sealing member 120 may be any material having good adhesion between metal layers and having good elasticity, such as composite materials, including rubber-asbestos, aerogel felt-polyurethane, etc.; rubber Class materials or plastics, etc. Please refer to FIG. 18 together. FIG. 18 is a schematic structural view of the first embodiment of the battery core being pressed into the metal plate.
方法实施例2Method embodiment 2
请参阅图19，图19是本发明电池组组装方法第二实施例的流程示意图；该方法包括但不限于以下步骤。Referring to FIG. 19, FIG. 19 is a schematic flow chart of a second embodiment of a method for assembling a battery pack according to the present invention; the method includes, but is not limited to, the following steps.
步骤S200，生成多个电池单元，其中电池单元的外壳包括上金属板和下金属板，上金属板和下金属板之间设置有密封件。Step S200, generating a plurality of battery cells, wherein the outer casing of the battery unit comprises an upper metal plate and a lower metal plate, and a sealing member is disposed between the upper metal plate and the lower metal plate.
步骤S210，将多个电池单元堆叠设置，并使相邻的电池单元的金属板部分的导电连接在一起，以形成电池组；其中，上金属板和/或下金属板包括连接区域和分离区域，分离区域包括一向电池单元内侧弯曲的弧形段，弧形段的厚度减薄。Step S210, stacking a plurality of battery cells, and electrically connecting the metal plate portions of adjacent battery cells together to form a battery pack; wherein the upper metal plate and/or the lower metal plate include a connection region and a separation region The separation region includes an arc segment that is curved toward the inner side of the battery unit, and the thickness of the arc segment is thinned.
相较于上一实施例来讲，金属板110在经过压合步骤之前还可以为平直结构，与上一实施例中金属板先压出分离区域和连接区域的情况有所不同，该实施例中是经过压合之后才形成分离区域和连接区域，即在将两侧密封材料粘接在一起形成密封件的同时压出分离区域和连接区域结构，并且在上、下金属板一者或两者中分离区域包括一向电池单元内侧弯曲的弧形段，弧形段的厚度减薄，以便当电池单元发生膨胀或者受到挤压时，该弧形段可以向外突出，以抵消或缓解电池单元金属板的形变。Compared with the previous embodiment, the metal plate 110 may have a flat structure before the pressing step, which is different from the case where the metal plate is first pressed out of the separation region and the connection region in the previous embodiment. In the example, the separation region and the connection region are formed after the pressing, that is, the separation region and the connection region structure are pressed while bonding the sealing materials on both sides to form the sealing member, and the upper and lower metal plates are either The separation region of the two includes an arc segment that is curved inside the battery unit, and the thickness of the arc segment is thinned so that when the battery unit expands or is squeezed, the arc segment can protrude outward to offset or relieve the battery. The deformation of the unit metal plate.
另外，请一并参阅图20-图23，图20是第二方法实施例中将电池内芯压合在金属板内的第一结构示意图，图21是第二方法实施例中将电池内芯压合在金属板内的第二结构示意图，图22是第二方法实施例中将电池内芯压合在金属板内的第三结构示意图以及图23是第二方法实施例中将电池内芯压合在金属板内的第四结构示意图。In addition, please refer to FIG. 20 to FIG. 23 together. FIG. 20 is a first structural diagram of the second embodiment of the battery core being pressed into the metal plate. FIG. 21 is a second embodiment of the battery core. FIG. 22 is a schematic view showing a third structure in which a battery inner core is press-fitted into a metal plate in a second method embodiment, and FIG. 23 is a second embodiment of the battery core. A schematic view of a fourth structure that is pressed into a metal plate.
图20中是形成两侧密封的示意图，经过压合后形成图4实施例中电池单元结构，标号110为金属板，标号1205为密封材料（下同）；图21中是形成异形密封件的示意图，两侧设置了不同面积大小的密封材料，最终可以获得图5实施例中电池单元结构。图22是形成单侧密封的示意图，经过压合后形成图3实施例中电池单元结构，图23是形成多密封件结构的示意图，经过压合后形成图7实施例中电池单元结构。关于电池组结构中端板、外壳等的组装过程，在本领域技术人员的理解范围内，此处不再赘述。另外，电池组组装过程中涉及到的密封材料、金属板选材、制作过程等，都可以参照前述电池组及电池单元结构实施例中的相关描述。Figure 20 is a schematic view showing the formation of the seals on both sides. After pressing, the structure of the battery unit in the embodiment of Fig. 4 is formed. The reference numeral 110 is a metal plate, and the reference numeral 1205 is a sealing material (the same applies hereinafter); In the schematic diagram, sealing materials of different area sizes are disposed on both sides, and finally the structure of the battery unit in the embodiment of FIG. 5 can be obtained. Figure 22 is a schematic view showing the formation of a one-sided seal. After pressing, the structure of the battery cell in the embodiment of Figure 3 is formed. Figure 23 is a schematic view showing the structure of the multi-seal member. After pressing, the structure of the battery cell in the embodiment of Figure 7 is formed. Regarding the assembly process of the end plate, the outer casing, and the like in the battery pack structure, those skilled in the art will not repeat them here. In addition, the sealing material, the selection of the metal plate, the manufacturing process, and the like involved in the assembly process of the battery pack can be referred to the relevant descriptions in the foregoing battery pack and battery cell structure embodiments.
需要说明的是，本方法实施例只是给出制作电池组的一般性组装方法，当然，根据本发明上述电池组及其电池单元结构的实施例中可以看出，电池组的结构可以有很多种，但是通过该方法经过简单的变形，都可以得到相应变形结构的电池组，因此在组装方法实施例中不不再一一列举。譬如，在步骤S100以及步骤S200中，具体可以将分离区域设于金属板的一端或者两端；在相邻电池单元的相邻金属板同一端分离区域之间设置弹性支撑体；在相邻电池单元的相邻金属板同一端分离区域之间设置电路板；在同一电池单元两金属板的同一端分离区域外周贴设密封胶带；以及设置多个密封件等等，关于这些技术特征的详细描述请参阅上述电池组实施例中的相关内容。It should be noted that the embodiment of the method only gives a general assembly method for manufacturing the battery pack. Of course, according to the embodiment of the battery pack and the battery unit structure thereof, the battery pack can have many structures. However, the battery pack corresponding to the deformed structure can be obtained by simple deformation of the method, and therefore will not be enumerated in the embodiment of the assembly method. For example, in step S100 and step S200, the separation region may be specifically disposed at one end or both ends of the metal plate; an elastic support body is disposed between the adjacent end regions of adjacent metal plates of adjacent battery cells; a circuit board is disposed between the adjacent metal plates of the unit at the same end separation area; a sealing tape is attached to the outer periphery of the same end of the same metal unit; and a plurality of seals and the like are provided, and detailed descriptions of these technical features are provided. Please refer to the relevant content in the above battery pack embodiment.
相较于现有技术，本发明实施例提供的电池组组装方法，在电池单元设置了安全防护结构，包括分离区域处设置间隙、弹性支撑体，在金属板的连接区域和分离区域之间设置弧形段等，都可以起到当电池单元发生膨胀或者受到挤压时，抵消或缓解电池单元金属板的形变的作用，另外，还将电路板设置在电池组内部来提高电池组空间利用率，并通过设置密封胶带来增强保护及密封性能。Compared with the prior art, the battery pack assembly method provided by the embodiment of the present invention provides a safety protection structure in the battery unit, including a gap and an elastic support body at the separation area, and is disposed between the connection area of the metal plate and the separation area. Arc segments, etc., can play the role of offsetting or mitigating the deformation of the battery unit metal plate when the battery unit expands or is squeezed. In addition, the circuit board is placed inside the battery pack to improve the battery space utilization. And by providing sealing tape to enhance protection and sealing performance.
以上所述仅为本发明的部分实施例，并非因此限制本发明的保护范围，凡是利用本发明说明书及附图内容所作的等效装置或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。The above description is only a part of the embodiments of the present invention, and is not intended to limit the scope of the present invention. Any equivalent device or equivalent process transformation made by using the description of the present invention and the contents of the drawings may be directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Claims (18)

  1. 一种电池组，其特征在于，所述电池组包括至少两个堆叠设置的电池单元，所述电池单元的外壳包括上金属板和下金属板，所述上金属板和下金属板之间设置有密封件；相邻电池单元的金属板部分的导电连接在一起，以形成连接区域和分离区域，所述分离区域包括一向电池单元内侧弯曲的弧形段，所述上金属板和/或所述下金属板在所述弧形段的厚度减薄。A battery pack, characterized in that the battery pack comprises at least two battery units arranged in a stack, the outer casing of the battery unit comprises an upper metal plate and a lower metal plate, and the upper metal plate and the lower metal plate are arranged a sealing member; the metal plate portions of the adjacent battery cells are electrically connected together to form a connection region and a separation region, the separation region including an arc segment bent toward the inner side of the battery unit, the upper metal plate and/or the The thickness of the metal plate is reduced in the curved section.
  2. 根据权利要求1所述的电池组，其特征在于，所述上金属板和/或所述下金属板在所述弧形段的厚度减薄10%-50%。The battery pack according to claim 1, wherein the upper metal plate and/or the lower metal plate are thinned by 10% to 50% in thickness of the curved segment.
  3. 根据权利要求1或2所述的电池组，其特征在于，所述连接区域和所述分离区域为一体结构。The battery pack according to claim 1 or 2, wherein the connection region and the separation region are a unitary structure.
  4. 根据权利要求3所述的电池组，其特征在于，相邻电池单元的相邻金属板连接区域之间相互紧靠连接。The battery pack according to claim 3, wherein adjacent metal plate connection regions of adjacent battery cells are closely connected to each other.
  5. 根据权利要求3所述的电池组，其特征在于，相邻电池单元的相邻金属板连接区域之间设有间隙并通过导电块连接。The battery pack according to claim 3, wherein a gap is provided between adjacent metal plate connection regions of adjacent battery cells and connected by a conductive block.
  6. 根据权利要求3所述的电池组，其特征在于，所述密封件为弹性材料制成，且同一电池单元的两端分别设有一个或多个密封件。The battery pack according to claim 3, wherein the sealing member is made of an elastic material, and one or more sealing members are respectively provided at both ends of the same battery unit.
  7. 根据权利要求6所述的电池组，其特征在于，相邻电池单元的相邻金属板分离区域部之间设有弹性支撑体。The battery pack according to claim 6, wherein an elastic support body is provided between adjacent metal plate separation region portions of adjacent battery cells.
  8. 根据权利要求1所述的电池组，其特征在于，所述电池组还包括设在相邻电池单元的相邻金属板分离区域之间的电路板。The battery pack according to claim 1, wherein said battery pack further comprises a circuit board disposed between adjacent metal plate separation regions of adjacent battery cells.
  9. 一种电池组组装方法，其特征在于，所述组装方法包括步骤：A battery pack assembling method, characterized in that the assembling method comprises the steps of:
    生成多个电池单元，其中所述电池单元的外壳包括上金属板和下金属板，所述上金属板和下金属板之间设置有密封件；Generating a plurality of battery cells, wherein the outer casing of the battery unit comprises an upper metal plate and a lower metal plate, and a sealing member is disposed between the upper metal plate and the lower metal plate;
    将多个所述电池单元堆叠设置，并使相邻的电池单元的金属板部分的导电连接在一起，以形成电池组；Stacking a plurality of the battery cells, and electrically connecting the metal plate portions of adjacent battery cells together to form a battery pack;
    其中，所述上金属板和/或所述下金属板包括连接区域和分离区域，所述分离区域包括一向电池单元内侧弯曲的弧形段，所述弧形段的厚度减薄。Wherein the upper metal plate and/or the lower metal plate comprises a connection region and a separation region, the separation region comprising an arc segment curved toward the inner side of the battery unit, the thickness of the arc segment being thinned.
  10. 根据权利要求9所述的组装方法，其特征在于，所述上金属板和/或所述下金属板在所述弧形段的厚度减薄10%-50%。The assembling method according to claim 9, wherein the upper metal plate and/or the lower metal plate are thinned by 10% to 50% in thickness of the curved segment.
  11. 根据权利要求10所述的组装方法，其特征在于，所述生成多个电池单元的步骤具体包括：The assembling method according to claim 10, wherein the step of generating a plurality of battery cells specifically comprises:
    在绝缘隔板上、下表面分别贴合阳极板和阴极板，以形成电池内芯；An anode plate and a cathode plate are respectively attached to the upper and lower surfaces of the insulating spacer to form a battery inner core;
    在上、下金属板相对侧的端部分别贴设密封材料；a sealing material is respectively attached to the opposite ends of the upper and lower metal plates;
    将所述电池内芯压合在金属板内，以形成电池单元；其中，上、下金属板通过密封材料贴合在一起，并形成密封容置腔体，所述电池内芯设于所述密封容置腔体内。Pressing the battery inner core into a metal plate to form a battery unit; wherein the upper and lower metal plates are bonded together by a sealing material and forming a sealed receiving cavity, wherein the battery inner core is disposed on the battery The seal is housed in the cavity.
  12. 根据权利要求9所述的组装方法，其特征在于，所述上金属板和/或所述下金属板在所述弧形段的厚度减薄10%-50%。The assembling method according to claim 9, wherein the upper metal plate and/or the lower metal plate are thinned by 10% to 50% in thickness of the curved segment.
  13. 根据权利要求9或10所述的组装方法，其特征在于，所述连接区域和所述分离区域为一体结构。The assembling method according to claim 9 or 10, wherein the connection region and the separation region are a unitary structure.
  14. 根据权利要求13所述的组装方法，其特征在于，相邻电池单元的相邻金属板连接区域之间相互紧靠连接。The assembling method according to claim 13, wherein adjacent metal plate connection regions of adjacent battery cells are closely connected to each other.
  15. 根据权利要求13所述的组装方法，其特征在于，相邻电池单元的相邻金属板连接区域之间设有间隙并通过导电块连接。The assembling method according to claim 13, wherein a gap is provided between adjacent metal plate connection regions of adjacent battery cells and connected by a conductive block.
  16. 根据权利要求13所述的组装方法，其特征在于，所述密封件为弹性材料制成，且同一电池单元的两端分别设有一个或多个密封件。The assembling method according to claim 13, wherein the sealing member is made of an elastic material, and one or more sealing members are respectively provided at both ends of the same battery unit.
  17. 根据权利要求16所述的组装方法，其特征在于，相邻电池单元的相邻金属板分离区域部之间设有弹性支撑体。The assembling method according to claim 16, wherein an elastic support body is provided between adjacent metal plate separation region portions of adjacent battery cells.
  18. 根据权利要求9所述的组装方法，其特征在于，所述电池组还包括设在相邻电池单元的相邻金属板分离区域之间的电路板。 The assembling method according to claim 9, wherein said battery pack further comprises a circuit board disposed between adjacent metal plate separation regions of adjacent battery cells.
PCT/CN2017/078215 2016-03-25 2017-03-24 Battery pack and assembly method therefor WO2017162214A1 (en)

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Publication number Priority date Publication date Assignee Title
WO2017162214A1 (en) * 2016-03-25 2017-09-28 安徽巨大电池技术有限公司 Battery pack and assembly method therefor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101079494A (en) * 2007-07-05 2007-11-28 上海交通大学 Making method of proton exchange film fuel cell electric piling
CN101123313A (en) * 2006-08-09 2008-02-13 大同特殊钢株式会社 Metallic bipolar plate for fuel cells, and fuel cell comprising the same
CN103746123A (en) * 2014-02-18 2014-04-23 武汉理工大学 Metal bipolar plate for proton exchange membrane fuel battery and electric pile formed by same
CN103996863A (en) * 2013-02-15 2014-08-20 原子能与替代能源委员会 Bipolar metal plate for fuel cell with proton exchange membrane
WO2015177365A1 (en) * 2014-05-23 2015-11-26 Reinz-Dichtungs-Gmbh Metallic bipolar plate with resilien sealing arrangement and electrochemical system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100375323C (en) * 2004-09-14 2008-03-12 南亚电路板股份有限公司 Method for improving double pole plate and proton exchange film contact of flat plate type fuel battery
DE102005022894A1 (en) * 2005-05-18 2006-11-23 Staxera Gmbh SOFC stack
SE530190C2 (en) * 2006-01-17 2008-03-25 Nilar Int Ab A battery stack arrangement
DE102006058335A1 (en) * 2006-12-11 2008-06-12 Staxera Gmbh Fuel cell stack and gasket for a fuel cell stack and their manufacturing process
TWI419403B (en) * 2011-04-29 2013-12-11 Iner Aec Executive Yuan A solid oxide fuel cell stack modular structure
CN203631683U (en) * 2013-12-06 2014-06-04 广州微宏电源科技有限公司 Lithium ion battery pack
WO2017162214A1 (en) * 2016-03-25 2017-09-28 安徽巨大电池技术有限公司 Battery pack and assembly method therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101123313A (en) * 2006-08-09 2008-02-13 大同特殊钢株式会社 Metallic bipolar plate for fuel cells, and fuel cell comprising the same
CN101079494A (en) * 2007-07-05 2007-11-28 上海交通大学 Making method of proton exchange film fuel cell electric piling
CN103996863A (en) * 2013-02-15 2014-08-20 原子能与替代能源委员会 Bipolar metal plate for fuel cell with proton exchange membrane
CN103746123A (en) * 2014-02-18 2014-04-23 武汉理工大学 Metal bipolar plate for proton exchange membrane fuel battery and electric pile formed by same
WO2015177365A1 (en) * 2014-05-23 2015-11-26 Reinz-Dichtungs-Gmbh Metallic bipolar plate with resilien sealing arrangement and electrochemical system

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