Rechargeable battery pack

Abstract

One or more embodiments of the present disclosure may include a rechargeable battery pack including: unit cells adjacent to each other; a case including an internal space for accommodating the unit cells; a fire extinguishing agent unit spaced apart from the unit cell and configured to generate a solid aerosol at a set temperature; and a medium between the plurality of fire extinguishing agent units.

Description

Technical Field

[0001] Various aspects of embodiments of this disclosure relate to rechargeable battery packs. Background Technology

[0002] Generally speaking, rechargeable batteries can be repeatedly charged and discharged.

[0003] A rechargeable battery pack may include individual cells and a housing for receiving the individual cells.

[0004] A problem with some rechargeable battery packs is that if one cell catches fire, adjacent cells can be ignited by the flame produced by the burning cell. Utility Model Content

[0005] One or more embodiments of this disclosure provide a rechargeable battery pack configured to actively extinguish burning cell batteries in the cell batteries.

[0006] According to one or more embodiments of the present disclosure, a rechargeable battery pack may include: a plurality of cell units adjacent to each other; a housing including an internal space for accommodating the plurality of cell units; a plurality of extinguishing agent units spaced apart from the plurality of cell units and configured to generate a solid aerosol at a set temperature; and a medium between the plurality of extinguishing agent units.

[0007] The medium may include a heat transfer unit for transferring heat between multiple extinguishing agent units.

[0008] The heat transfer unit can be connected to multiple extinguishing agent units.

[0009] Multiple extinguishing agent units can be spaced apart from each other by a distance equal to or greater than approximately 70 mm, and the heat transfer unit is located between the multiple extinguishing agent units.

[0010] The medium may include a heat delay unit that blocks the gaps between multiple extinguishing agent units.

[0011] The thermal delay unit can cover the gap between multiple extinguishing agent units.

[0012] Multiple extinguishing agent units can overlap each other, and the heat delay unit is located between the multiple extinguishing agent units.

[0013] The weight of the first extinguishing agent unit in the multiple extinguishing agent units can satisfy Equation 1: Y = 0.0088X + 0.211, where Y is the unit volumetric weight of the first extinguishing agent unit in the internal space of the shell (g / L), and X is the battery capacity (Wh) of one of the multiple cell batteries.

[0014] In Equation 1, X satisfies Equation 2: X = V × 6.8 / Z, where V is the battery capacity (Wh) of one of the multiple cell units, and Z is the volume (L) of the internal space of the casing.

[0015] The internal volume of the casing can be set to approximately 6.8L.

[0016] The distance between the first extinguishing agent unit and the unit battery in a multi-extinguishing agent unit can be approximately 2mm to approximately 70mm.

[0017] The distance between the first extinguishing agent unit and the unit battery can be approximately 2mm to approximately 32mm.

[0018] The distance between the first extinguishing agent unit and the unit battery can be approximately 20mm.

[0019] Solid aerosols may include potassium free radicals.

[0020] Multiple extinguishing agent units may include a mixture of potassium compounds and resins.

[0021] Multiple extinguishing agent units may further include a mesh for supporting the mixture.

[0022] The mesh can be configured to penetrate the mixture.

[0023] The first extinguishing agent unit of the multiple extinguishing agent units may be located in the internal space of the housing, and the second extinguishing agent unit of the multiple extinguishing agent units may be located in the second internal space of the second housing.

[0024] The rechargeable battery pack may further include: a battery manager connected to the cell unit and the extinguishing agent unit and between the cell unit and the extinguishing agent unit, wherein the battery manager is configured to sense the temperature of the cell unit and is configured to heat one of the extinguishing agent units in response to the temperature of one of the cell units being higher than a set temperature.

[0025] The battery manager may include a heater attached to the extinguishing agent unit, and the battery manager is configured to control the heater to heat the extinguishing agent unit.

[0026] According to one embodiment, a rechargeable battery pack is provided, which is configured to actively extinguish burning cell batteries in the cell batteries. Attached Figure Description

[0027] Figure 1 A rechargeable battery pack according to some embodiments is shown.

[0028] Figure 2 Show Figure 1 Examples of extinguishing agent units and media are shown in the figure.

[0029] Figure 3 Another example of a fire extinguishing agent unit and medium for a rechargeable battery pack according to some embodiments is shown.

[0030] Figures 4 to 6 A graph showing the experimental results of checking the effect of the weight of the fire extinguishing agent unit of a rechargeable battery pack according to some embodiments.

[0031] Figures 7 to 9 A graph showing the experimental results of checking the distance between the extinguishing agent unit and the cell in a rechargeable battery pack according to some embodiments.

[0032] Figure 10 A rechargeable battery pack according to some embodiments is shown.

[0033] Figure 11 A rechargeable battery pack according to some embodiments is shown. Detailed Implementation

[0034] The present disclosure will be described more fully below with reference to the accompanying drawings, in which embodiments of the disclosure are illustrated. As those skilled in the art will recognize, the embodiments described herein may be modified in one or more suitable different ways, all without departing from the scope of the present disclosure.

[0035] It will be understood that when an element or layer is referred to as being "on" another element or layer, "connected to," or "linked to" another element or layer, it may be directly on, connected to, or linked to the other element or layer, or one or more intermediary elements or layers may be present. When an element or layer is referred to as being "directly on" another element or layer, "directly connected to," or "directly linked to" another element or layer, no intermediary element or layer is present. For example, when a first element is described as being "linked" or "connected" to a second element, the first element may be directly linked to or connected to the second element, or the first element may be indirectly linked to or connected to the second element via one or more intermediary elements.

[0036] In the accompanying drawings, the dimensions of various elements, layers, etc., may be enlarged for clarity of illustration. The same reference numerals denote the same elements. As used herein, the term “and / or” includes any and all combinations of one or more of the associated enumerated items. Furthermore, the use of “may” in describing embodiments of this disclosure refers to “one or more embodiments of this disclosure.” Expressions such as “at least one of…” and “any one of…” modify the entire list of elements when preceding / following the list of elements, and do not modify individual elements in the list. For example, the expression “at least one of a, b, and c” indicates only a, only b, only c, both a and b, both a and c, both b and c, all a, b, and c, or variations thereof. As used herein, the terms “use” and “be used” may be considered synonymous with the terms “utilize” and “be exploited,” respectively. As used herein, the terms “substantially,” “about,” and similar terms are used as approximate terms rather than terms of degree and are intended to explain inherent variations in measured or calculated values ​​that will be recognized by one of ordinary skill in the art.

[0037] It will be understood that although the terms first, second, third, etc., may be used herein to describe various elements, components, areas, layers, and / or segments, these elements, components, areas, layers, or segments should not be limited by these terms. These terms are used to distinguish one element, component, area, layer, or segment from another element, component, area, layer, or segment. Therefore, the first element, component, area, layer, or segment discussed below may be referred to as the second element, component, area, layer, or segment without departing from the teachings of the exemplary embodiments.

[0038] For ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” and “above” are used herein to describe the relationship between one element or feature and another, as illustrated in the figures. It will be understood that, in addition to the orientation depicted in the figures, the spatial relative terms are intended to cover different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element or feature described as “below” or “under” other elements or features will be oriented as “above” or “above” other elements or features. Thus, the term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise), and the spatial relative descriptors used herein should be interpreted accordingly.

[0039] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to limit this disclosure. As used herein, unless the context clearly indicates otherwise, the singular form “a” is intended to include the plural form as well. It will be further understood that the terms “comprising” and / or “having” as used in this specification indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0040] Those skilled in the art will recognize that, in view of the overall content of this disclosure, each suitable feature of the various embodiments of this disclosure may be combined in part or in whole or in combination with one another, and may be technically interlocked and operated in various suitable ways, and unless otherwise stated or implied, each embodiment may be implemented independently of one another or in combination with one another in any suitable way.

[0041] Furthermore, any numerical range disclosed and / or set forth herein is intended to include all subranges with the same numerical precision contained within the set forth range. For example, the range “1.0 to 10.0” is intended to include all subranges between the stated minimum value of 1.0 and the stated maximum value of 10.0 (and inclusive), that is, a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limit set forth herein is intended to include all lower numerical limits contained herein, and any minimum numerical limit set forth in this specification is intended to include all higher numerical limits contained herein. Therefore, the applicant reserves the right to amend this specification (including the claims) to expressly set forth any subranges contained within the range expressly set forth herein. All such ranges are intended to be described implicitly in this specification such that the range used to expressly set forth any such subrange will be deemed appropriate.

[0042] Reference Figures 1 to 9 Describes a rechargeable battery pack according to one or more embodiments.

[0043] A rechargeable battery pack may include individual cells and a housing for receiving (or accommodating) the individual cells. However, a rechargeable battery pack is not limited to this and may include multiple rechargeable battery modules, each including an individual cell and a housing for receiving the individual cells.

[0044] Figure 1 A rechargeable battery pack according to some embodiments is shown.

[0045] refer to Figure 1 The rechargeable battery pack 1000 may include a cell battery 100, a housing 200, a fire extinguishing agent unit 300, and a medium 400.

[0046] The cell units 100 may be adjacent to each other (e.g., adjacent to each other or stacked side by side) and may be received (or housed) within the interior space 210 of the housing 200. The cell units 100 may have various suitable rechargeable battery capacities and various suitable rechargeable battery forms. For example, each cell unit 100 may have a battery capacity of approximately 18Wh and a cylindrical shape, but is not limited thereto. The cell units 100 may be connected in series or in parallel with each other using various suitable connecting elements. The cell units 100 may be in contact with each other, and / or the cell units 100 may be spaced apart from each other, but is not limited thereto. The cell units 100 may be arranged on the underside of the interior space 210 of the housing 200, but is not limited thereto.

[0047] The housing 200 may include an internal space 210 for receiving the cell battery 100. The internal space 210 of the housing 200 may have one or more suitable spatial shapes for receiving (or accommodating) the rechargeable battery. The internal space 210 of the housing 200 may have one or more suitable volumes. The housing 200 may include one or more suitable lower covers, side covers, and / or upper covers for receiving (or accommodating) the cell battery 100.

[0048] The extinguishing agent unit 300 may be spaced apart from the unit battery 100 within the internal space 210 of the housing 200. The extinguishing agent unit 300 may generate a solid aerosol at a set or reference temperature (e.g., a predetermined temperature) and may extinguish flames FI generated in the internal space 210.

[0049] For example, the extinguishing agent unit 300 can generate a solid aerosol including potassium radicals at a set or predetermined temperature of about 300°C or higher. If the flame FI is generated by one of the unit cells 100, at least one of the extinguishing agent units 300 generates a solid aerosol including potassium radicals, and the extinguishing agent unit 300 generates an endothermic reaction for generating a stable compound, thereby reducing the temperature in the internal space 210 of the housing 200 in which the flame FI is generated, and effectively extinguishing the burning unit cell 100 in the unit cell 100.

[0050] According to another example, if the flame FI is generated by one of the cell units 100, at least one of the extinguishing agent units 300 may generate a solid aerosol including potassium radicals, and the potassium radicals reduce the concentration of H and OH in the internal space 210 of the housing 200, thereby minimizing or reducing the concentration of H and OH in the internal space 210 of the housing 200 in which the flame FI is generated, and effectively extinguishing the burning cell unit 100 in the cell unit 100.

[0051] According to another example, the concentrations of H and OH in the internal space 210 of the shell 200 are determined by K₂O and KO₂O as follows.- The chemical formulas shown are reduced (or decomposed) by K2O and KO. - The potassium compound included in at least one solid aerosol generated by the extinguishing agent unit 300 can extinguish the burning cell 100 in the interior space 210.

[0052] Chemical formula

[0053] K2O+H + →2KOH, KOH + OH - →H2O, KO - +H + →KOH

[0054] The extinguishing agent unit 300 may be located on the upper side (or area) of the interior space 210 of the housing 200, but is not limited thereto. The extinguishing agent unit 300 may be attached to the inner surface 201 of the housing 200 on the upper side (or area) of the interior space 210 of the housing 200.

[0055] For example, the extinguishing agent unit 300 may be attached to the inner surface 201 of the housing 200 by one or more suitable attachment elements such as a strap, or by a support element such as a support protruding from the inner surface 201 of the housing 200. The extinguishing agent unit 300 may be covered by one or more suitable covering elements such as a capsule.

[0056] Medium 400 may be located between extinguishing agent units 300. Medium 400 may connect extinguishing agent units 300. Medium 400 may transfer heat from a first extinguishing agent unit 300 burned by the flame FI of a burning unit cell 100 to a second extinguishing agent unit 300. Medium 400 may include heat transfer units for transferring heat between extinguishing agent units 300. The heat transfer units of medium 400 may connect extinguishing agent units 300. Extinguishing agent units 300 may be spaced about 70 mm or more apart, wherein the heat transfer units of medium 400 are located between extinguishing agent units 300. The heat transfer units of medium 400 may include one or more suitable types of heat transfer elements. For example, the heat transfer units of medium 400 may have a form in which a flammable material such as gunpowder, potassium nitrate, or oil is coated along the line used to connect adjacent extinguishing agent units 300, but is not limited thereto. For example, the heat transfer unit of medium 400 may include one or more suitable types of metals for transferring heat between adjacent extinguishing agent units 300, but is not limited thereto. The heat transfer unit of medium 400 may include one or more suitable heat transfer elements for transferring heat of about 300°C or higher between adjacent extinguishing agent units 300.

[0057] The heat transfer unit of medium 400 can be connected to the extinguishing agent unit 300 to transfer heat between the extinguishing agent units 300, so that the heat generated by the combustion of the first extinguishing agent unit 300 due to the flame FI of the burning unit battery 100 can be transferred to the adjacent second extinguishing agent unit 300 to generate solid aerosol. Furthermore, if a set or predetermined time has elapsed since the first extinguishing agent unit 300 began burning, the second extinguishing agent unit 300 can also be burned and generate solid aerosol. The extinguishing agent units 300 can be sequentially heated by medium 400 at a set or predetermined temperature to sequentially generate solid aerosol in the internal space 210 of the housing 200, thereby effectively extinguishing the burning unit battery 100 in the unit battery 100.

[0058] Figure 2 Show Figure 1 Examples of extinguishing agent units and media are shown in the figure.

[0059] For example, refer to Figure 2 The extinguishing agent unit 300 may include a mixture 310 formed of one or more suitable potassium compounds and one or more suitable resins, and a mesh for supporting the mixture 310. The mesh may be included in the medium 400; in some embodiments, the extinguishing agent unit 300 may include additional mesh, but is not limited thereto. The mixture 310 may have a form in which the potassium compound and resin can be compressed under high temperature and pressure, but is not limited thereto. The mesh of the medium 400 may support the mixture 310. The mesh of the medium 400 may be supported on the inner surface 201 of the housing 200, but is not limited thereto. The mesh of the medium 400 may penetrate the mixture 310 in the horizontal direction and may support the mixture 310; however, in some embodiments, the mesh of the medium 400 may support the lower or upper side of the mixture 310, but is not limited thereto.

[0060] Since the mixture 310 of the extinguishing agent unit 300 is supported by the mesh of the medium 400, the mixture 310 of the first extinguishing agent unit 300, which is burned by the burning unit cell 100, can also be supported by the mesh of the medium 400. Therefore, the burning mixture 310 can be prevented from falling from the mesh of the medium 400 onto the unit cell 100, and the temperature rise of the unit cell 100 can be suppressed or reduced.

[0061] The mesh of medium 400 may include metal as a heat transfer element. The mesh of medium 400 may connect extinguishing agent units 300 to transfer heat between them. The heat from the combustion of the first extinguishing agent unit 300 due to the flame of the burning unit battery 100 can generate a solid aerosol, which can also be transferred to the adjacent second extinguishing agent unit 300. Therefore, if a set or predetermined time has elapsed since the first extinguishing agent unit 300 began combustion, the second extinguishing agent unit 300 can also be ignited and generate a solid aerosol. The extinguishing agent units 300 can be sequentially heated through the mesh of medium 400 at a set or predetermined temperature to sequentially generate solid aerosols within the internal space 210 of the housing 200, thereby effectively extinguishing the burning unit battery 100 within the unit battery 100.

[0062] Figure 3 Another example of a fire extinguishing agent unit and medium for a rechargeable battery pack according to an embodiment is shown.

[0063] According to another example, see reference Figure 3 The first extinguishing agent unit 300 in the extinguishing agent unit 300 may be arranged in the first internal space 210a of the first housing 200a, the second extinguishing agent unit 300 may be arranged in the second internal space 210b of the second housing 200b, and the third extinguishing agent unit 300 may be arranged in the third internal space 210c of the third housing 200c. A medium 400 may connect the first extinguishing agent unit 300, the second extinguishing agent unit 300, and the third extinguishing agent unit 300 in the extinguishing agent unit 300. The medium 400 may include a heat transfer unit. The medium 400 may connect the first extinguishing agent unit 300 arranged in the first internal space 210a of the first housing 200a, the second extinguishing agent unit 300 arranged in the second internal space 210b of the second housing 200b, and the third extinguishing agent unit 300 arranged in the third internal space 210c of the third housing 200c to transfer heat between the extinguishing agent units 300. The extinguishing agent unit 300 can be heated sequentially by the medium 400 at a set or predetermined temperature to generate solid aerosols in the first internal space 210a of the first housing 200a, the second internal space 210b of the second housing 200b, and the third internal space 210c of the third housing 200c, thereby effectively extinguishing the unit batteries arranged in the internal space of the housing.

[0064] The weight of the first extinguishing agent unit 300 in the extinguishing agent unit 300 satisfies Equation 1.

[0065] Equation 1

[0066] Y = 0.0088X + 0.211

[0067] In Equation 1, Y is the volumetric weight (g / L) of the first extinguishing agent unit 300 in the internal space 210 of the housing 200, and X is the battery capacity (Wh) of one of the unit batteries 100 in the internal space 210 of the housing 200. For example, the set or predetermined volume of the internal space 210 of the housing 200 may be approximately 6.8L, but is not limited thereto.

[0068] If the internal space 210 of the shell 200 has various volumes, then X in Equation 1 can satisfy Equation 2.

[0069] Equation 2

[0070] X = V × 6.8 / Z

[0071] In Equation 2 of this paper, V is the battery capacity (Wh) of one of the cell cells 100, and Z is the volume (L) of the internal space 210 of the casing 200.

[0072] The volumetric weight (g / L) of the first extinguishing agent unit 300 in the internal space 210 of the housing 200 satisfies Equations 1 and 2, thus providing a rechargeable battery pack 1000 including the extinguishing agent unit 300 for actively extinguishing combustion in the unit battery 100.

[0073] Now refer to Figures 4 to 6 The description examines the test results of the effect (or efficacy) of the first extinguishing agent unit 300 in the extinguishing agent unit 300 of the rechargeable battery pack 1000 according to some embodiments, based on weight.

[0074] Figures 4 to 6 A graph showing the experimental results of checking the effect of the weight of the fire extinguishing agent unit of a rechargeable battery pack according to some embodiments. Figure 4 The graph shows the maximum temperature (max T) of a cell cell burning based on the unit volume weight (K radical weight) of the extinguishing agent unit within the internal space, assuming the internal space has a volume of approximately 6.8 L. Figure 5 The graph shows the maximum temperature duration (high temperature duration) of a cell cell burning based on the unit volume weight (K radical weight) of the extinguishing agent unit within the internal space, assuming an internal space volume of approximately 6.8 L. Figure 6 The diagram shows a graph depicting the temperature (Ncell T) of a cell surrounding a burning cell, based on the volumetric weight (Kradical) of the extinguishing agent unit within the internal space, if the internal space of the casing has a volume of approximately 6.8 L. For example, the cell surrounding the burning cell may include another cell adjacent to the burning cell.

[0075] In some embodiments, Figures 4 to 6 As shown, if the internal space of the housing has a volume of about 6.8L, if the weight of the extinguishing agent unit is about 0.37g / L (for example, when the weight of the extinguishing agent unit is about 0.37g / L), the maximum temperature (max T) of the burning cell, the maximum temperature duration (high temperature duration), and the temperature of the cell surrounding the burning cell (N Cell T) have a minimum point, each cell received (or contained) in the internal space of the housing has a cell capacity of about 18Wh, and the distance between the extinguishing agent unit and the cell is about 2mm to about 70mm.

[0076] For example, if X in Equation 1 is replaced with approximately 18 Wh, Y is calculated to be approximately 0.37 g / L.

[0077] Equation 1

[0078] Y = 0.0088X + 0.211

[0079] Here, if the internal space of the casing has a set or predetermined volume, Y is the unit volumetric weight (g / L) of the first extinguishing agent unit in the internal space of the casing, and X is the battery capacity (Wh) of one of the unit cells.

[0080] In some embodiments, if the internal space of the housing is approximately 6.8L, the maximum temperature (max T), the maximum temperature duration (high temperature duration), and the temperature of the cell surrounding the burning cell (N Cell T) of the cell burning within the internal space of the housing have a minimum point at a extinguishing agent cell weight calculated according to Equation 1 of approximately 0.37 g / L.

[0081] For example, if the internal space of the shell has one or more suitable volumes, X in Equation 1 can satisfy Equation 2.

[0082] Equation 2

[0083] X = V × 6.8 / Z

[0084] Here, V is the battery capacity (Wh) of one of the cell units, and Z is the volume (L) of the internal space of the casing.

[0085] If the internal volume of the casing is approximately 0.765 L, and one of the cell units has a capacity of approximately 18 Wh, then approximately 18 Wh can replace V, approximately 0.765 L can replace Z, and X in Equation 2 can be calculated as approximately 160 Wh. If X in Equation 1 is replaced with approximately 160 Wh, then Y can be calculated as approximately 1.62 g / L.

[0086] If the volume of the internal space of the casing is about 0.765L, the maximum temperature of the cell burning in the internal space of the casing, the duration of the maximum temperature, and the temperature of the cell surrounding the burning cell can have a minimum point of about 1.62g / L, calculated according to Equations 1 and 2.

[0087] refer to Figure 1 For example, the volume of the internal space 210 of the housing 200 may be about 10 L, and the weight of the first extinguishing agent unit 300 in the extinguishing agent unit 300 may be about 1 g to about 32 g. If the weight of the first extinguishing agent unit 300 is less than about 1 g, it may be difficult to handle the extinguishing agent unit 300, difficult to attach the extinguishing agent unit 300 to the inner surface 201, and the amount of the extinguishing agent unit 300 is small (e.g., a relatively small amount), so it may be difficult to extinguish the burning cell 100. If the weight of the first extinguishing agent unit 300 is greater than about 32 g, the burning cell 100 can be extinguished, and the combustion can be diffused to the cell 100 arranged around the burning cell 100 by the heat generated by the combustion of the extinguishing agent unit 300. In some embodiments, the volume of the internal space 210 of the housing 200 is about 10L and the weight of the first extinguishing agent unit 300 in the extinguishing agent unit 300 is a threshold value that limits the upper and lower limits of the configuration to about 1g to about 32g.

[0088] refer to Figure 1 The distance between the first extinguishing agent unit 300 and the unit battery 100 can be approximately 2 mm to approximately 70 mm. For example, the distance between the first extinguishing agent unit 300 and the unit battery 100 may include a first vertical distance L1 between the extinguishing agent unit 300 and the first unit battery 100, a second distance L2 between the extinguishing agent unit 300 and the second unit battery 100, and a third distance L3 between the extinguishing agent unit 300 and the third unit battery 100. The distance between the first extinguishing agent unit 300 and the unit battery 100 may include the distance between one of the first extinguishing agent unit 300 and the unit battery 100, as well as the distance between the first extinguishing agent unit 300 and each of the unit batteries 100.

[0089] For example, if the internal space 210 of the housing 200 has a volume of approximately 6.8 L, one of the unit batteries 100 has a capacity of approximately 18 Wh, and the extinguishing agent unit 300 has a weight of approximately 5 g, the distance between the first extinguishing agent unit 300 and the unit battery 100 can be approximately 2 mm to approximately 70 mm. When the distance between the first extinguishing agent unit 300 and the unit battery 100 is less than approximately 2 mm, the extinguishing agent unit 300 obstructs the path of the flame FI of the burning unit battery 100, and the temperature of the burning unit battery 100 and the unit batteries 100 surrounding the burning unit battery 100 can increase due to the heat of combustion of the extinguishing agent unit 300. If the distance between the first extinguishing agent unit 300 and the unit battery 100 is greater than approximately 70 mm, the heat transferred from the flame FI of the burning unit battery 100 to the extinguishing agent unit 300 can be lower than the set temperature of the burning extinguishing agent unit 300 (e.g., 300 °C or higher), and the extinguishing agent unit 300 may not be able to generate solid aerosols. It can be observed that the distance between the first extinguishing agent unit 300 and the unit battery 100 is a threshold value with a numerical limit configuration of approximately 2 mm to approximately 70 mm, which limits the upper and lower limits.

[0090] Now refer to Figures 7 to 9 The description examines test results of the effects caused by the distance between the first extinguishing agent unit 300 and the unit battery 100 of a rechargeable battery pack 1000 according to some embodiments.

[0091] Figures 7 to 9 A graph showing the experimental results of checking the distance between the extinguishing agent unit and the cell according to some embodiments of a rechargeable battery pack. Figure 7 The graph shows the maximum temperature (maxT) of a burning cell based on the distance between the extinguishing agent unit and the cell (distance from the cell to the K radical) if the internal space of the casing has a volume of about 6.8L, one of the cells in the cell has a capacity of about 18Wh, and the extinguishing agent unit has a weight of about 5g. Figure 8 The graph shows the maximum temperature duration (high temperature duration) of a burning cell based on the distance between the extinguishing agent unit and the cell (distance from the cell to the K radical) if the internal space of the casing has a volume of about 6.8L, one of the cells in the cell has a capacity of about 18Wh and the extinguishing agent unit has a weight of about 5g. Figure 9 The graph shows the temperature (N Cell T) of a cell arranged around a burning cell, depending on the distance between the extinguishing agent unit and the cell (distance from the cell to the K radical), if the internal space of the casing has a volume of about 6.8 L, one of the cells has a capacity of about 18 Wh and the extinguishing agent unit has a weight of about 5 g.

[0092] refer to Figures 7 to 9 It can be observed that if the internal space of the casing has a volume of approximately 6.8L, one of the cell units has a capacity of approximately 18Wh, and the extinguishing agent unit has a weight of approximately 5g, and the distance between the cell unit and the extinguishing agent unit is approximately 2mm to approximately 32mm (e.g., when the distance between the cell unit and the extinguishing agent unit is approximately 2mm to approximately 32mm), the maximum temperature and duration of the burning cell unit are relatively low. Furthermore, if the distance between the cell unit and the extinguishing agent unit is approximately 2mm to approximately 32mm (e.g., when the distance between the cell unit and the extinguishing agent unit is approximately 2mm to approximately 32mm), the temperature of the cell units arranged around the burning cell unit is relatively low. And if the distance between the cell unit and the extinguishing agent unit is approximately 20mm (e.g., when the distance between the cell unit and the extinguishing agent unit is approximately 20mm), there is a minimum point. It can be observed that this may be because the flame of the cell burning before the extinguishing agent unit burns can be obstructed, thereby directing the flame toward the cell arranged around the burning cell, and if the heat generated by the burning extinguishing agent unit (e.g., when the extinguishing agent unit burns) is transferred to the cell arranged around the burning cell to increase the temperature of the cell arranged around the burning cell.

[0093] Based on the above test results, the following numerical limitations can be identified: if the internal space of the housing has a volume of approximately 6.8L, one of the cells in the unit has a capacity of approximately 18Wh, and the extinguishing agent unit has a weight of approximately 5g, then the distance between the extinguishing agent unit and the cell is approximately 2mm to approximately 32mm.

[0094] The following numerical constraints can be observed: if the internal space of the housing has a volume of approximately 6.8L, one of the batteries has a capacity of approximately 18Wh, and the extinguishing agent unit has a weight of approximately 5g, then the distance between the extinguishing agent unit and the battery unit is approximately 20mm.

[0095] For example, the medium 400 can connect the extinguishing agent units 300 to transfer heat between them. The extinguishing agent units 300 can be sequentially heated by the medium 400 at a set or predetermined temperature to sequentially generate solid aerosols in the internal space 210 of the housing 200, so that the rechargeable battery pack 1000 according to one or more embodiments can effectively extinguish the burning of the unit battery 100 in the unit battery 100.

[0096] In some embodiments, the volumetric weight (g / L) of the first extinguishing agent unit 300 in the internal space 210 of the housing 200 can satisfy Equation 1, and the maximum temperature of the burning cell, the maximum temperature duration, and the temperature of the cell arranged around the burning cell can be minimized, so that the rechargeable battery pack 1000 according to one or more embodiments can actively extinguish the burning cell 100 in the cell 100.

[0097] The rechargeable battery pack 1000 according to one or more embodiments may include a configuration having a numerical limiting threshold that limits the volume of the internal space 210 of the housing 200 to about 10L and the weight of the first extinguishing agent unit 300 to about 1g to about 32g, thereby actively extinguishing the burning of the unit battery 100 in the unit battery 100.

[0098] A rechargeable battery pack 1000 according to one or more embodiments may include a configuration having a numerical limiting threshold that limits the distance between the first extinguishing agent unit 300 and the unit battery 100 to about 2 mm to about 70 mm, thereby actively extinguishing the burning unit battery 100 in the unit battery 100.

[0099] A rechargeable battery pack 1000 according to one or more embodiments may include a configuration having a numerical limiting threshold that limits the distance between the first extinguishing agent unit 300 and the unit battery 100 to about 2 mm to about 32 mm, thereby actively extinguishing the burning unit battery 100 in the unit battery 100.

[0100] A rechargeable battery pack 1000 according to one or more embodiments may include a configuration having a numerical limiting threshold that limits the distance between the first extinguishing agent unit 300 and the unit battery 100 to 20 mm, thereby actively extinguishing the burning unit battery 100 in the unit battery 100.

[0101] A rechargeable battery pack 1000 is provided for actively extinguishing combustion in a cell 100.

[0102] Now refer to Figure 10 The description pertains to a rechargeable battery pack 1002 according to some other embodiments.

[0103] The parts that differ from those of the rechargeable battery pack according to one or more embodiments will now be described.

[0104] Figure 10 A rechargeable battery pack according to some other embodiments is shown.

[0105] refer to Figure 10According to some other embodiments, the rechargeable battery pack 1002 may include a cell battery 100, a housing 200, a fire extinguishing agent unit 300, and a medium 400.

[0106] Extinguishing agent units 300 may overlap each other vertically within the internal space 210 of housing 200, with medium 400 located therebetween. Medium 400 may be arranged between the extinguishing agent units 300. Medium 400 may separate the extinguishing agent units 300. Medium 400 may block or reduce the heat set or predetermined time from the flame FI of the burning unit battery 100 within the extinguishing agent unit 300. Medium 400 may include heat delay units for blocking gaps between the extinguishing agent units 300. The heat delay units of medium 400 may cover the gaps between the extinguishing agent units 300. The heat delay units of medium 400 may include one or more suitable types of heat delay elements for blocking heat set or predetermined time. For example, the heat delay units of medium 400 may include paper and resin tape for covering the gaps between overlapping extinguishing agent units 300. For example, the resin tape may include one or more suitable types of suitable resins, such as polypropylene (PP), polyimide (PI), or polyethylene terephthalate (PET). The heat delay unit of the medium 400 may include one or more suitable types of heat delay elements for delaying the heat transferred between the overlapping extinguishing agent units 300 for a set or predetermined time.

[0107] The heat delay unit of the medium 400 can block or reduce the gap between the extinguishing agent units 300 to delay the heat transfer between the extinguishing agent units 300 by a set or predetermined time. The heat from the first extinguishing agent unit 300, which generates solid aerosol due to the combustion of the flame FI of the burning unit battery 100, can be transferred to the adjacent second extinguishing agent unit 300 after the set or predetermined time. Therefore, the second extinguishing agent unit 300 can burn after the first extinguishing agent unit 300 has burned for the set or predetermined time, and the second extinguishing agent unit 300 can generate solid aerosol. The extinguishing agent units 300 can be sequentially heated by the medium 400 at a set or predetermined temperature to sequentially generate solid aerosol in the internal space 210 of the housing 200, thereby effectively extinguishing the burning unit battery 100 in the unit battery 100.

[0108] For example, the medium 400 can block or reduce the gap between the extinguishing agent units 300 to delay the heat transfer between the extinguishing agent units 300 for a set or predetermined time, and the extinguishing agent units 300 can be sequentially heated by the medium 400 at a set or predetermined temperature to sequentially generate solid aerosols in the internal space 210 of the housing 200. Therefore, the rechargeable battery pack 1002 according to other embodiments can effectively extinguish the burning of the unit battery 100 in the unit battery 100.

[0109] The volumetric weight (g / L) of the first extinguishing agent unit 300 in the internal space 210 of the housing 200 can satisfy Equation 1, and the maximum temperature of the burning unit cell, the maximum temperature duration, and the temperature of the unit cells arranged around the burning unit cell can be minimized. Therefore, the rechargeable battery pack 1002 according to other embodiments can actively extinguish the burning unit cell 100 in the unit cell 100.

[0110] According to other embodiments, the rechargeable battery pack 1002 includes a configuration with a numerical limiting threshold, wherein the volume of the internal space 210 of the housing 200 is about 10L, and the weight of the first extinguishing agent unit 300 is about 1g to about 32g, thereby actively extinguishing the burning of the unit battery 100 in the unit battery 100.

[0111] According to other embodiments, the rechargeable battery pack 1002 includes a configuration with a numerical limiting threshold, wherein the distance between the first extinguishing agent unit 300 and the unit battery 100 is about 2 mm to about 70 mm, thereby actively extinguishing the burning unit battery 1000 in the unit battery 100.

[0112] According to other embodiments, the rechargeable battery pack 1002 may include a configuration with a numerical limiting threshold, wherein the distance between the first extinguishing agent unit 300 and the unit battery 100 is about 2 mm to about 32 mm, thereby actively extinguishing the burning unit battery 100 in the unit battery 100.

[0113] According to other embodiments, the rechargeable battery pack 1002 may include a configuration with a numerical limiting threshold, wherein the distance between the first extinguishing agent unit 300 and the unit battery 100 is about 20 mm, thereby actively extinguishing the burning unit battery 100 in the unit battery 100.

[0114] A rechargeable battery pack 1002 is provided for actively extinguishing combustion in the cell 100.

[0115] Now refer to Figure 11 A rechargeable battery pack 1003 according to other embodiments is described.

[0116] The parts that differ from the above-described rechargeable battery pack according to some embodiments will now be described.

[0117] Figure 11 A rechargeable battery pack according to another embodiment is shown.

[0118] refer to Figure 11 The rechargeable battery pack 1003 may include a cell battery 100, a housing 200, a fire extinguishing agent unit 300, a medium 400, and a battery manager 500.

[0119] A battery manager 500 may be disposed between the unit battery 100 and the extinguishing agent unit 300. The battery manager 500 may be connected to at least one of the unit battery 100 and the extinguishing agent unit 300. The battery manager 500 may sense the temperature of the unit battery 100. If the temperature of one of the unit batteries 100 is higher than a set or predetermined temperature, the battery manager 500 may heat at least one of the extinguishing agent units 300. At least one of the extinguishing agent units 300 heated by the battery manager 500 may generate a solid aerosol comprising potassium radicals, and other extinguishing agent units 300 may receive heat through the medium 400 and may subsequently generate solid aerosols.

[0120] The battery manager 500 may include a heater 510. The heater 510 may be attached to at least one of the extinguishing agent units 300, and the battery manager 500 may control the heater 510 to heat the extinguishing agent unit 300.

[0121] The battery manager 500 may include one or more suitable types of battery management systems, and may include, but is not limited to, a temperature sensor for sensing the temperature of the unit battery 100 and a heating element for heating at least one of the fire extinguishing agent units 300.

[0122] For example, according to other embodiments, the rechargeable battery pack 1003 may include a battery manager 500 for sensing the temperature of the unit battery 100, heating at least one of the extinguishing agent units 300, and sequentially generating solid aerosols from the extinguishing agent units 300, thereby actively extinguishing burning unit batteries 100 that are above a set or predetermined temperature or unit batteries 100 that may burn with a high probability.

[0123] The medium 400 can connect the gaps between the extinguishing agent units 300 to transfer heat between them. The extinguishing agent units 300 can be sequentially heated by the medium 400 at a set or predetermined temperature to sequentially generate solid aerosols in the internal space 210 of the housing 200. Therefore, the rechargeable battery pack 1003 according to other embodiments can effectively extinguish the burning of the unit battery 100 in the unit battery 100.

[0124] The volumetric weight (g / L) of the first extinguishing agent unit 300 in the internal space 210 of the housing 200 satisfies Equation 1. The maximum temperature of the burning cell, the duration of the maximum temperature, and the temperature of the cells arranged around the burning cell can be minimized, so that the rechargeable battery pack 1003 according to other embodiments can actively extinguish the burning cell 100 in the cell 100.

[0125] According to other embodiments, the rechargeable battery pack 1003 may include a configuration with a numerical limiting threshold, wherein the volume of the internal space 210 of the housing 200 is about 10L and the weight of the first extinguishing agent unit 300 is about 1g to about 32g, thereby actively extinguishing the burning of the unit battery 100 in the unit battery 100.

[0126] According to other embodiments, the rechargeable battery pack 1003 may include a configuration with a numerical limiting threshold, wherein the distance between the first extinguishing agent unit 300 and the unit battery 100 is about 2 mm to about 70 mm, thereby actively extinguishing the burning unit battery 100 in the unit battery 100.

[0127] According to other embodiments, the rechargeable battery pack 1003 may include a configuration with a numerical limiting threshold, wherein the distance between the first extinguishing agent unit 300 and the unit battery 100 is about 2 mm to about 32 mm, thereby actively extinguishing the burning unit battery 100 in the unit battery 100.

[0128] According to other embodiments, the rechargeable battery pack 1003 may include a configuration with a numerical limiting threshold, wherein the distance between the first extinguishing agent unit 300 and the unit battery 100 is about 20 mm, thereby actively extinguishing the burning unit battery 100 in the unit battery 100.

[0129] A rechargeable battery pack 1003 is provided for actively extinguishing combustion in the cell 100.

[0130] While embodiments of the present disclosure have been described in conjunction with what are now considered to be practical exemplary embodiments, it should be understood that the present disclosure is not limited to the disclosed embodiments, but is intended to cover one or more suitable modifications and equivalent arrangements included within the scope of the claims and their equivalents.

Claims

1. A rechargeable battery pack, characterized in that, include: Multiple cell units, adjacent to each other; The housing includes an internal space for accommodating the plurality of cell batteries; Multiple extinguishing agent units, spaced apart from the multiple unit batteries, are configured to generate solid aerosols at a set temperature; as well as The medium is located between the plurality of extinguishing agent units.

2. The rechargeable battery pack according to claim 1, characterized in that, The medium includes a heat transfer unit for transferring heat between the plurality of extinguishing agent units.

3. The rechargeable battery pack according to claim 2, characterized in that, The heat transfer unit is connected to the plurality of fire extinguishing agent units.

4. The rechargeable battery pack according to claim 2, characterized in that, The plurality of extinguishing agent units are spaced apart from each other by a distance equal to or greater than 70 mm, and the heat transfer unit is located between the plurality of extinguishing agent units.

5. The rechargeable battery pack according to claim 1, characterized in that, The medium includes a heat delay unit for blocking the gaps between the plurality of extinguishing agent units.

6. The rechargeable battery pack according to claim 5, characterized in that, The thermal delay unit covers the gap between the plurality of extinguishing agent units.

7. The rechargeable battery pack according to claim 5, characterized in that, The plurality of extinguishing agent units overlap each other, and the heat delay unit is located between the plurality of extinguishing agent units.

8. The rechargeable battery pack according to claim 1, characterized in that, The weight of the first extinguishing agent unit in the plurality of extinguishing agent units satisfies Equation 1: Y = 0.0088X + 0.211 Wherein, Y is the unit volumetric weight of the first extinguishing agent unit in the internal space of the housing, in g / L, and X is the battery capacity of one of the plurality of cell batteries, in Wh.

9. The rechargeable battery pack according to claim 8, characterized in that, In Equation 1, X satisfies Equation 2: X = V × 6.8 / Z Wherein, V is the battery capacity of one of the plurality of cell batteries, in Wh, and Z is the volume of the internal space of the casing, in L.

10. The rechargeable battery pack according to claim 8, characterized in that, The internal space of the housing has a set volume of 6.8L.

11. The rechargeable battery pack according to claim 1, characterized in that, The distance between the first extinguishing agent unit and the unit battery in the plurality of extinguishing agent units is 2mm to 70mm.

12. The rechargeable battery pack according to claim 11, characterized in that, The distance between the first extinguishing agent unit and the unit battery is 2mm to 32mm.

13. The rechargeable battery pack according to claim 11, characterized in that, The distance between the first extinguishing agent unit and the unit battery is 20mm.

14. The rechargeable battery pack according to claim 1, characterized in that, The solid aerosol includes potassium free radicals.

15. The rechargeable battery pack according to claim 1, characterized in that, The extinguishing agent unit comprises a mixture of potassium compounds and resin.

16. The rechargeable battery pack according to claim 15, characterized in that, The extinguishing agent unit further includes a mesh that supports the mixture.

17. The rechargeable battery pack according to claim 16, characterized in that, The mesh is configured to penetrate the mixture.

18. The rechargeable battery pack according to claim 1, characterized in that, The first extinguishing agent unit of the plurality of extinguishing agent units is located in the internal space of the housing, and The second extinguishing agent unit of the plurality of extinguishing agent units is located in the second internal space of the second housing.

19. The rechargeable battery pack according to claim 1, characterized in that, The rechargeable battery further includes: A battery manager, connected to the unit battery and the fire extinguishing agent unit, and positioned between the unit battery and the fire extinguishing agent unit. The battery manager is configured to sense the temperature of the cell unit and to heat one of the plurality of fire extinguishing agent units in response to the temperature of one of the plurality of cell units being higher than a set temperature.

20. The rechargeable battery pack according to claim 19, characterized in that, The battery manager includes a heater attached to the extinguishing agent unit, and The battery manager is configured to control the heater to heat the extinguishing agent unit.

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