Battery device and battery container

Abstract

This invention discloses a battery device and a battery container. The battery container includes a housing, a battery holder, and an end cap. The battery holder is disposed within the housing. The battery holder has two opposing recessed portions. The two recessed portions, together with an inner edge of the housing, form two first channels. The end cap is mounted on one end of the housing. The end cap includes multiple external holes and two second channels. Each second channel connects the multiple external holes and one of the first channels. The second channel includes multiple non-parallel buffer segments, which are sequentially defined as a first buffer segment, a second buffer segment, up to an Nth buffer segment, along the first channel to the multiple external holes. The first buffer segments are not parallel to the first channels. The cross-sectional area of ​​the first buffer segment is less than 25% of the cross-sectional area of ​​each first channel, and N is a positive integer not less than 3.

Description

Technical Field

[0001] This invention relates to a device, and more particularly to a battery device and a battery container. Background Technology

[0002] The higher the energy of existing battery devices, the greater the risk of injury from high-temperature flames, flammable gases, and toxic gases generated during thermal runaway. However, the demand for high energy density and miniaturization in existing battery devices has become mainstream.

[0003] However, existing battery devices achieve high energy density by increasing the number of battery packs or the volume of batteries, which reduces the usable space of existing battery devices. In other words, when existing battery devices experience thermal runaway, the high-pressure gas generated is difficult to release effectively, resulting in gas accumulation and deflagration.

[0004] Therefore, the inventor believed that the above-mentioned defects could be improved, and thus devoted himself to research and applied scientific principles, and finally proposed an invention that is reasonably designed and effectively improves the above-mentioned defects. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a battery device and battery container to address the shortcomings of the prior art.

[0006] One embodiment of the present invention discloses a battery device comprising: a battery container including: a housing having an inner edge; a battery holder disposed within the housing, the battery holder having two opposing recessed portions, the two recessed portions cooperating with the inner edge to jointly form two first channels; an end cap mounted on one end of the housing, the end cap including a plurality of external holes and two second channels, each second channel communicating with the plurality of external holes and one of the first channels, and the second channel including a plurality of non-parallel buffer segments, the plurality of buffer segments being sequentially defined as a first buffer segment, a second buffer segment, up to an Nth buffer segment along the first channels to the plurality of external holes, the first buffer segment being non-parallel to the first channel, and the cross-sectional area of ​​the first buffer segment being less than 25% relative to the cross-sectional area of ​​each first channel, where N is a positive integer not less than 3; and

[0007] Multiple battery packs are housed within the battery holder.

[0008] Optionally, the first buffer segment is perpendicular to the first channel, and any two connected buffer segments are perpendicular to each other.

[0009] Optionally, the end cap is a stacked structure and defines a stacking direction. The end cap includes multiple plates stacked along the stacking direction, each plate including a predetermined notch. In any three plates in an adjacent stack, a portion of the predetermined notch of the middle plate overlaps a portion of the predetermined notches of the other two plates along the stacking direction, so that three buffer sections are formed between the three plates.

[0010] Optionally, the plate furthest from the battery holder is defined as an outer plate. The outer plate includes a body and a plurality of baffles extending from the body in a stacking direction. The body has a plurality of external holes, and the plurality of baffles abut against the plates of adjacent outer plates to collectively form a plurality of buffer sections.

[0011] Optionally, the cross-sectional area of ​​the first buffer section is between 2T / K and 2T / E, where T is the cross-sectional area of ​​the first buffer section, K is the cross-sectional area of ​​the outer casing, and E is the cross-sectional area of ​​each battery pack.

[0012] Optionally, the battery holder includes multiple assemblies, with two assemblies respectively provided at both ends of each battery pack. Each assembly has an inner end and a connecting end facing opposite directions, and each assembly has a stepped structure on the connecting end. In the two assemblies on each battery pack, the inner end of one assembly faces the inner end of the other assembly. In two adjacent battery packs, the connecting end of the assembly on one battery pack faces the connecting end of the assembly on the other battery pack, so that the stepped structures on the two connecting ends together form a buffer channel connecting one of the first channels.

[0013] Optionally, the stepped structure of each component includes a first stepped surface, a second stepped surface, and a step surface connecting the first stepped surface and the second stepped surface. The depth of the first stepped surface along the step surface to the second stepped surface is not less than 1.5 mm, and the second stepped surface is coplanar with multiple electrodes of the battery pack.

[0014] Optionally, the battery pack is defined in a width direction, and each assembly also includes multiple receiving slots and two side slots. The multiple receiving slots respectively receive multiple electrodes of the battery pack, and each side slot is connected from the first channel to the receiving slot of the corresponding receiving electrode along the width direction; the width of each side slot is not less than 1.5 mm.

[0015] Optionally, the battery container includes multiple fire-resistant layers, and the two fittings on each battery pack are respectively covered with two fire-resistant layers at the outer edges of the corresponding two first channel positions.

[0016] One embodiment of the present invention discloses a battery container, comprising: a housing having an inner side edge; a battery holder disposed within the housing, the battery holder having two opposing recessed portions, the two recessed portions cooperating with the inner side edge to jointly form two first channels; and

[0017] An end cap is installed at one end of the housing. The end cap includes multiple external holes and two second channels. Each second channel connects the multiple external holes and one of the first channels. The second channel includes multiple non-parallel buffer segments. The multiple buffer segments are sequentially defined as a first buffer segment, a second buffer segment, and an Nth buffer segment along the first channel to the multiple external holes. The first buffer segment is not parallel to the first channel, and the cross-sectional area of ​​the first buffer segment is less than 25% of the cross-sectional area of ​​each first channel. N is a positive integer not less than 3.

[0018] In summary, the battery device and battery container disclosed in the embodiments of the present invention can effectively release the gas generated by thermal runaway while having high energy density and miniaturized volume through the design of "each second channel connecting multiple external holes and one of the first channels, and the second channel including multiple buffer sections that are not parallel to each other" and "the cross-sectional area of ​​the first buffer section is less than 25% relative to the cross-sectional area of ​​each first channel".

[0019] To further understand the features and technical content of this invention, please refer to the following detailed description and accompanying drawings. However, these descriptions and drawings are only for illustrating the invention and are not intended to limit the scope of protection of the invention in any way. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the battery device of the present invention.

[0021] Figure 2 This is an exploded view of the battery device of the present invention.

[0022] Figure 3 This is another exploded view of the battery device of the present invention.

[0023] Figure 4 For along Figure 1 A schematic diagram of the cross section along line IV-IV.

[0024] Figure 5 This is a cross-sectional schematic diagram of a portion of the battery device of the present invention.

[0025] Figure 6 This is a schematic diagram of the end cap and part of the outer casing of the battery device of the present invention.

[0026] Figure 7 This is a schematic diagram of the plate and outer plate of the battery device of the present invention.

[0027] Figure 8 This is a plan view of four adjacent assemblies of the present invention.

[0028] Figure 9This is an exploded view of two adjacent assemblies of the present invention.

[0029] Figure 10 This is an exploded view of two adjacent assemblies of the present invention. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the "battery device and battery container" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated beforehand. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention.

[0031] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used in this document should, as appropriate, include any combination of one or more of the related listed items.

[0032] Additionally, in the following description, if it is indicated that a specific diagram is referred to or as shown in a specific diagram, it is only to emphasize that most of the relevant content in the following description appears in that specific diagram, but does not limit the following description to refer only to that specific diagram.

[0033] See Figures 1 to 10 As shown, this embodiment provides a battery device 100. Figures 1 to 3 As shown, the battery device 100 includes a battery container 1 and a plurality of battery packs 2 disposed within the battery container 1. In the event of thermal runaway in any of the battery packs 2, the battery device 100 can effectively release gases (e.g., hydrogen, carbon dioxide, carbon monoxide, etc.) through the battery container 1, thereby preventing further damage caused by high pressure or gases.

[0034] It should be noted that, although the battery container 1 and the multiple battery packs 2 are collectively defined as the battery device 100 in this embodiment, the present invention is not limited thereto. For example, the battery device 100 can also be used alone (e.g., implemented, manufactured, sold, etc.) or in combination with other components. The structure of each component of the battery device 100 will be described below, and the connection relationship between the components of the battery device 100 will be explained as appropriate.

[0035] Cooperate Figures 1 to 3 As shown, in this embodiment, the battery container 1 includes a housing 11, a battery holder 12 disposed within the housing 11, and two end caps 13 disposed on the housing 11.

[0036] In this embodiment, the outer shell is made of a rigid, flame-retardant metal material (e.g., aluminum), but this is not a limitation of the invention. In practice, the outer shell 11 may include two C-shaped covers 111 and two connecting pieces 112. The openings of the two C-shaped covers 111 are arranged facing each other, and two connecting pieces 112 are respectively provided on both sides between the two C-shaped covers 111 for fixation, making the outer shell 11 a generally hollow columnar structure with an inner edge (not shown). In other words, the outer shell 11 can be defined with a length direction D1, and the outer shell 11 has two ports in the length direction D1.

[0037] Cooperate Figures 3 to 5 As shown, the battery holder 12 is used to install multiple battery packs 2, allowing the multiple battery packs 2 to be fixed inside the housing 11. The battery holder 12 has two opposing recessed portions (not shown), which are arranged along the length direction D1, and the two recessed portions, together with the inner edge, can jointly form two first channels G1. That is, the two first channels G1 are parallel to the length direction D1.

[0038] More specifically, the battery holder 12 includes multiple mounting parts 121, multiple fire-resistant plates 122, and multiple connecting pieces 124. Each mounting part 121 is installed at an end of the battery pack 2, and the electrodes of the battery pack 2 are connected by the connecting pieces 124. In other words, each end of the battery pack 2 is provided with two mounting parts 121, and each of the two mounting parts 121 has two connecting pieces 124 on its opposite sides. Each fire-resistant plate 122 is disposed between the mounting parts 121 of two adjacent battery packs 2, that is, one fire-resistant plate 122 is disposed between two battery packs 2.

[0039] The design of each of the mounting components 121 is based on the configuration of the battery pack 2. Specifically, in this embodiment, the battery pack 2 consists of five cells 21 as a group, and each mounting component 121 is designed to include five receiving slots 1211 corresponding to the five cells 21. The five receiving slots 1211 respectively accommodate the electrodes of the five cells 21, and the five receiving slots 1211 are arranged in a quincunx pattern, that is, one receiving slot 1211 is located in the center, and the other four receiving slots 1211 are symmetrically distributed around the central receiving slot 1211. Accordingly, each mounting component 121 can form a groove on the outer edge of three adjacent receiving slots 1211, but this is not a limitation of the invention.

[0040] For example, in other embodiments of the invention not shown, each of the fittings 121 may also include four receiving slots 1211 arranged in a rectangular manner, and the outer edges of two adjacent receiving slots 1211 can form the recessed portion.

[0041] Re-reference Figure 2 , Figure 5 and Figure 6 As shown, the two end caps 13 are respectively installed at both ends of the housing 11, and the two end caps 13 can close the two ports, so that the housing 11 and the two end caps 13 can form a closed space.

[0042] It should be noted that the battery container 1 in this embodiment includes two end caps 13, but this is not a limitation of the present invention. For example, in other embodiments of the present invention not shown, the outer casing 11 may have only one port, so that the battery container 1 only needs one end cap 13 to cover the port. In other words, the number of end caps 13 of the battery container 1 may also be one. For ease of explanation, the two end caps 13 of the battery container 1 will be described below.

[0043] Cooperate Figures 5 to 7 As shown, the end cap 13 includes two second channels G2 that connect to the two first channels respectively, and a plurality of external holes H1 that connect the two second channels G2. Each second channel G2 is a multi-bend path, that is, each second channel G2 includes a plurality of non-parallel buffer segments G21.

[0044] The plurality of buffer segments G21 are sequentially defined along the first channel G1 to the plurality of external holes H1 as a first buffer segment G21, a second buffer segment G21, to an Nth buffer segment G21, and N is a positive integer not less than 3, that is, each second channel G2 has at least three buffer segments G21.

[0045] In practice, the first buffer section G21 is not parallel to the first channel G1, and the cross-sectional area of ​​the first buffer section G21 is less than 25% of the cross-sectional area of ​​each of the first channels G1. Accordingly, when any of the battery packs 2 experiences thermal runaway, gas can be released sequentially from the first buffer section G21 of the first channel G1, the second channel G2, to the Nth buffer section G21, causing the gas to be released through the plurality of external holes H1.

[0046] It is worth noting that when any of the battery packs 2 experiences thermal runaway, the gas generated by the battery pack 2 enters from the wide channel (i.e., the first channel G1) into the narrow channel (i.e., the second channel G2), thus reducing the impact force of the gas. Furthermore, the multiple bends in the second channel G2 effectively reduce the impact force of the gas again, allowing it to be discharged through the multiple external holes H1.

[0047] Preferably, the first buffer segment G21 may be perpendicular to the first channel G1, and any two connected buffer segments G21 are perpendicular to each other, thereby effectively reducing the impact of the gas. However, the invention is not limited thereto. For example, in other embodiments not shown, the first buffer segment G21 has an angle of 120 degrees with the first channel G1, and any two connected buffer segments G21 have an angle of 80 degrees.

[0048] Furthermore, the high energy density and miniaturization of the battery device 100 are related to the cross-sectional area of ​​the housing 11 and the cross-sectional area of ​​each of the battery packs 2. Therefore, the cross-sectional area of ​​the first buffer section G21 is preferably designed to be between 2T / K and 2T / E, where T is the cross-sectional area of ​​the first buffer section G21, K is the cross-sectional area of ​​the housing 11, and E is the cross-sectional area of ​​each of the battery packs 2. Accordingly, the second channel G2 is ensured to withstand the gas impact generated by the battery packs of corresponding energy, that is, the second channel G2 of the present invention will not be damaged by the gas impact generated by the high-energy battery packs 2.

[0049] More specifically, the end cap 13 is a stacked structure and has a defined stacking direction (parallel to the length direction D1), and the end cap 13 includes a plurality of plates 131 stacked along the stacking direction. In practice, the plurality of plates 131 may be made of two fire-resistant materials (e.g., fire-resistant silicone and fire-resistant plastic) stacked in an alternating manner.

[0050] In addition, such as Figure 6As shown, each of the plates 131 includes a predetermined notch PG, and in any three plates 131 in an adjacent stack, a portion of the predetermined notch PG of the middle plate 131 overlaps a portion of the predetermined notch PG of the other two plates 131 along the stacking direction, thereby forming three buffer segments G21 between the three plates 131. That is, the plurality of buffer segments G21 are formed by the inner edges of the plurality of plates 131 at the predetermined notch PG, and the plurality of buffer segments G21 are bent in a plane parallel to the stacking direction.

[0051] Better, such as Figure 7 As shown, some of the multiple buffer segments G21 can also be designed to be bent in a plane perpendicular to the stacking direction. Specifically, the plate furthest from the battery holder 12 is defined as an outer plate 131', which includes a body 1311 and multiple baffles 1312 extending from the body 1311 along the stacking direction. The body 1311 has multiple external holes H1, and the multiple baffles 1312 abut against the plate 131 of the adjacent outer plate 131' to collectively form multiple buffer segments G21. Accordingly, the multiple buffer segments G21 on the outer plate 131' are bent in an extension direction of the outer plate 131' perpendicular to the stacking direction.

[0052] It is worth noting that, such as Figures 8 to 10 As shown, in order to prevent the battery container 1 from being unable to release gas in real time, the battery container 1 can be further designed with a buffer channel G3 between two adjacent assemblies 121.

[0053] In detail, each of the aforementioned components 121 has an opposite inner end E1 and a connecting end E2, and each of the aforementioned components 121 has a stepped structure LS on the connecting end E2. Specifically, in two components 121 on each of the battery packs 2, the inner end E1 of one component 121 faces the inner end E1 of the other component 121. Furthermore, in two adjacent battery packs 2, the connecting end E2 of the component 121 on one of the battery packs 2 faces the connecting end E2 of the component 121 on the other battery pack 2, such that the stepped structures LS on the two connecting ends E2 together form a buffer channel G3 connecting one of the first channels G1.

[0054] Preferably, the stepped structures LS on the two connecting ends E2 facing each other are partially staggered, that is, a portion of the stepped structure LS can abut against the surface of the connecting end E2. In other words, the projection area of ​​the stepped structure LS of one connecting end E2 along the length direction onto the projection area of ​​the other connecting end E2 partially overlaps the stepped structure LS of the other connecting end E2, making the buffer channel G3 a multi-bend structure.

[0055] Furthermore, the stepped structure LS of each of the aforementioned assemblies 121 includes a first stepped surface LS1, a second stepped surface LS2, and a trapezoidal surface LS3 connecting the first stepped surface LS1 and the second stepped surface LS2. The first stepped surface LS1 protrudes further from the battery pack 2 in the length direction D1 than the second stepped surface LS2; that is, the first stepped surface LS1 has a depth along the trapezoidal surface LS3 to the second stepped surface LS2. In practice, the second stepped surface LS2 is coplanar with a plurality of electrodes of the battery pack 2, and the depth may be not less than 1.5 mm.

[0056] On the other hand, in order to effectively guide the gas or flame (e.g., increase the rate of flame or combustible gas exhaust), each of the assembly 121 also includes two side slots 123. Specifically, each of the battery packs 2 defines a width direction perpendicular to the length direction D1, and each of the side slots 123 connects along the width direction from the first channel G1 to the receiving groove 1211 corresponding to the receiving electrode. Accordingly, the gas or flame generated by the electrode is generated to enter the first channel G1 along the two side slots 123.

[0057] Preferably, the width of each of the side slots 123 is not less than 1.5 mm to ensure that gas or flame can be effectively guided into the first channel G1.

[0058] Furthermore, the battery container 1 may also include multiple fire-resistant layers 3 (e.g., fire-retardant paper), with two fire-resistant layers 3 covering the outer edges of the two fittings 121 on each battery pack 2 at the corresponding two first channels G1 positions. Accordingly, the fire-resistant layers 3 can prevent the two fittings 121 from being damaged by flame impact, thereby improving the service life of the battery container 1.

[0059] Of course, the battery container 1 may also include a heat-resistant insulating layer 4 (e.g., polyester film), which covers the plurality of the assembly parts 121. In this embodiment, the plurality of battery packs 2 of the battery device 100 are connected in series by a plurality of connectors 5 (i.e., the battery device 100 includes a plurality of connectors 5), so the heat-resistant insulating layer 4 also has a plurality of exposed holes H2, and the plurality of exposed holes H2 are respectively positioned corresponding to the plurality of connectors 5 to avoid covering the plurality of connectors 5.

[0060] [Technical Effects of the Embodiments of the Invention]

[0061] In summary, the battery device and battery container disclosed in the embodiments of the present invention can effectively release the gas generated by thermal runaway while having high energy density and miniaturized volume through the design of "each second channel connecting multiple external holes and one of the first channels, and the second channel including multiple buffer sections that are not parallel to each other" and "the cross-sectional area of ​​the first buffer section is less than 25% of the cross-sectional area of ​​each first channel".

[0062] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made based on the description and drawings of the present invention are included within the protection scope of the present invention.

Claims

1. A battery device, characterized in that, The battery device includes: A battery container, comprising: A shell having an inner edge; A battery holder is disposed inside the housing. The battery holder has two opposing recessed portions, which together with the inner side edge form two first channels. An end cap is installed at one end of the housing. The end cap includes a plurality of external holes and two second channels. Each second channel connects the plurality of external holes and one of the first channels. The second channel includes a plurality of non-parallel buffer segments. The plurality of buffer segments are sequentially defined as a first buffer segment, a second buffer segment, and an Nth buffer segment along the first channel to the plurality of external holes. The first buffer segment is not parallel to the first channel, and the cross-sectional area of ​​the first buffer segment is less than 25% of the cross-sectional area of ​​each of the first channels. N is a positive integer not less than 3. as well as Multiple battery packs are disposed within the battery holder.

2. The battery device according to claim 1, characterized in that, The first buffer segment is perpendicular to the first channel, and any two connected buffer segments are perpendicular to each other.

3. The battery device according to claim 1, characterized in that, The end cap is a stacked structure and defines a stacking direction. The end cap includes a plurality of plates stacked along the stacking direction, each plate including a predetermined notch. In any three plates in an adjacent stack, a portion of the predetermined notch of the middle plate overlaps a portion of the predetermined notches of the other two plates along the stacking direction, thereby forming three buffer sections between the three plates.

4. The battery device according to claim 3, characterized in that, The plate furthest from the battery holder is defined as an outer plate, the outer plate including a body and a plurality of baffles extending from the body along the stacking direction, the body having a plurality of external openings, the plurality of baffles abutting against the plates of adjacent outer plates to collectively form a plurality of buffer sections.

5. The battery device according to claim 1, characterized in that, The cross-sectional area of ​​the first buffer section is between 2T / K and 2T / E, where T is the cross-sectional area of ​​the first buffer section, K is the cross-sectional area of ​​the outer casing, and E is the cross-sectional area of ​​each battery pack.

6. The battery device according to claim 1, characterized in that, The battery holder includes multiple fittings, with two fittings respectively provided at both ends of each battery pack. Each fitting has an inner end and a connecting end facing opposite directions, and each fitting has a stepped structure on the connecting end. In the two fittings on each battery pack, the inner end of one fitting faces the inner end of the other fitting. In two adjacent battery packs, the connecting end of the fitting on one battery pack faces the connecting end of the fitting on the other battery pack, so that the stepped structures on the two connecting ends together form a buffer channel connecting one of the first channels.

7. The battery device according to claim 6, characterized in that, The stepped structure of each of the aforementioned components includes a first stepped surface, a second stepped surface, and a step surface connecting the first stepped surface and the second stepped surface. The depth of the first stepped surface along the step surface to the second stepped surface is not less than 1.5 mm, and the second stepped surface is coplanar with the plurality of electrodes of the battery pack.

8. The battery device according to claim 6, characterized in that, The battery pack is defined in a width direction, and each of the assembly parts further includes multiple receiving slots and two side slots. The multiple receiving slots respectively receive multiple electrodes of the battery pack, and each of the side slots is connected from the first channel along the width direction to the receiving slot corresponding to the receiving electrode; the width of each side slot is not less than 1.5 mm.

9. The battery device according to claim 6, characterized in that, The battery container includes multiple fireproof layers, and the two fittings on each battery pack are respectively covered by two fireproof layers at the outer edges of the corresponding two first channel positions.

10. A battery container, characterized in that, The battery container includes: A shell having an inner edge; A battery holder is disposed inside the housing. The battery holder has two opposing recessed portions, which together with the inner side edge form two first channels. as well as An end cap is installed at one end of the housing. The end cap includes a plurality of external holes and two second channels. Each second channel connects the plurality of external holes and one of the first channels. The second channel includes a plurality of non-parallel buffer segments. The plurality of buffer segments are sequentially defined as a first buffer segment, a second buffer segment, and an Nth buffer segment along the first channel to the plurality of external holes. The first buffer segment is not parallel to the first channel, and the cross-sectional area of ​​the first buffer segment is less than 25% of the cross-sectional area of ​​each of the first channels. N is a positive integer not less than 3.

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