Battery device

Abstract

A battery device according to an embodiment of the present invention may comprise: a plurality of cell stacks electrically connected to each other through connection members; the plurality of battery core stacking bodies are accommodated in the shell; and a support member provided between the connection member and the housing to support the housing, the support member may include: a buffer body made of an insulating material and having a first insertion groove formed on a first surface, the connection member being inserted into the first insertion groove; a conductive wire inserted into a second insertion groove formed on a second surface of the buffer body and electrically connected to at least one of the plurality of cell stacks; and an insulating cover coupled to the second surface of the buffer body.

Description

Technical Field

[0001] The present invention relates to a battery device which is easy to manufacture. Background Art

[0002] In recent years, high-power battery devices using non-aqueous electrolytes with high energy density have been developed. Such high-power battery devices can achieve large capacity by connecting multiple cells or battery devices in series or in parallel, and are used for devices requiring high power, such as motor drives for electric vehicles.

[0003] A conventional battery device includes a cell monitoring unit (CMU) that monitors the voltage / temperature of each battery cell and a battery management unit (BMU) that aggregates information monitored by the CMU and overall manages the battery device, and includes at least one conductive line for electrically connecting these units.

[0004] Since multiple conductive wires may need to be bonded to a battery device during the manufacturing process, it may take a lot of time to fix the conductive wires into the battery device. Therefore, a structure that can stably and quickly fix the conductive wires is needed. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] It is an object of the present invention to provide a battery device which is easy to manufacture.

[0007] Another object of the present invention is to provide a battery device capable of stably and quickly fixing a conductive wire.

[0008] (II) Technical solution

[0009] A battery device according to an embodiment of the present invention may include: a plurality of battery cell stacks electrically connected to each other via a connecting component; a shell housing the plurality of battery cell stacks internally; and a supporting component disposed between the connecting component and the shell to support the shell, the supporting component may include: a buffer body made of an insulating material and having a first insertion groove formed on a first surface, the connecting component being inserted into the first insertion groove; a conductive wire being inserted into a second insertion groove formed on a second surface of the buffer body and being electrically connected to at least a portion of the plurality of battery cell stacks; and an insulating cover coupled to the second surface of the buffer body.

[0010] In this embodiment, the insulating cover may extend to wrap at least one of the side surfaces of the buffer body.

[0011] In this embodiment, the two connecting components may be arranged side by side with each other, and at least a portion of the insulating cover may be arranged between the two connecting components.

[0012] In this embodiment, the connection member may be fastened to the plurality of battery cell stacks by a fastening member, and the buffer body may include an expansion groove into which the fastening member protruding outside the connection member is inserted.

[0013] In this embodiment, the buffer body may be inserted and coupled to the fastening component.

[0014] In this embodiment, the buffer body may be made of expanded polypropylene (EPP).

[0015] In this embodiment, the insulating cover may be made of a sheet containing mica.

[0016] In this embodiment, the second insertion groove may be formed as a slot in the form of a narrow slot.

[0017] In this embodiment, connectors may be formed at both ends of the conductive wire, and the connectors are coupled to the plurality of battery cell stacks.

[0018] In this embodiment, a plurality of the first insertion grooves may be spaced apart, the buffer body may include a third insertion groove, the third insertion groove is arranged between the first insertion grooves in the form of a narrow groove, and at least a portion of the insulation cover is inserted into the third insertion groove.

[0019] In addition, the battery device according to the embodiment of the present invention may include: a plurality of battery cell stacks electrically connected to each other by a connecting component; a housing accommodating the plurality of battery cell stacks; and a supporting component disposed between the connecting component and the housing. The supporting component may be coupled to the connecting component to cover the upper surface of the connecting component, thereby ensuring insulation between the connecting component and the housing, and the upper surface of the supporting component may be in surface contact with the housing to suppress vibration of the housing.

[0020] In this embodiment, the battery device may further include a conductive wire, a portion of which is embedded in the support component, and both ends of the conductive wire are exposed outside the support component to be respectively coupled to the plurality of battery cell stacks.

[0021] (III) Beneficial effects

[0022] According to an embodiment of the present invention, a support member disposed between the cell stack and the case to suppress shaking or trembling of the upper plate is disposed to wrap the connection member, thereby preventing a short circuit between the connection members in the event of thermal runaway.

[0023] In addition, during the manufacturing process of the battery device, the conductive wire can be fixed and set at the correct position by simply combining the supporting member with the connecting member, thereby reducing the manufacturing process and manufacturing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an exploded perspective view schematically showing a battery device according to an embodiment of the present invention.

[0025] Figure 2 yes Figure 1 A partially exploded stereogram of .

[0026] Figure 3 yes Figure 2 An enlarged view of the support component shown in FIG.

[0027] Figure 4 yes Figure 3 Exploded three-dimensional diagram.

[0028] Figure 5 yes Figure 3 Bottom stereogram of .

[0029] Figure 6 yes Figure 2 Magnified view of part A.

[0030] Figure 7 yes Figure 2 Magnified view of part B.

[0031] Figure 8 is an exploded perspective view of a supporting component according to another embodiment of the present invention.

[0032] Fig. 9 yes Figure 8 A bottom perspective view of the support component shown in FIG. Best Mode for Carrying Out the Invention

[0033] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Some components in the accompanying drawings may be exaggerated, omitted or schematically shown, and the size of each component does not completely reflect the actual size.

[0034] Figure 1 is a perspective view schematically showing a battery device according to an embodiment of the present invention, Figure 2 yes Figure 1 A partially exploded stereogram of the Figure 6 yes Figure 2 A magnified view of part A. Figure 7 yes Figure 2 Magnified view of part B.

[0035] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7 The battery device 1 according to the embodiment of the present invention may include a plurality of battery cell stacks 10 , a case 50 , a separator 60 , a connecting member 80 , and a supporting member 70 .

[0036] The cell stack 10 may include a secondary battery cell such as a rechargeable lithium-ion battery or a nickel-hydrogen battery. Each cell stack 10 may be formed of a hexahedron formed by stacking a plurality of cells and may be housed in a separate module housing or fixed in a stacked state by a bracket or the like.

[0037] The cell stack 10 may be provided with at least one terminal on one side. The terminal may be a conductive component provided on the cell stack 10 to electrically connect the cell to the outside. The terminal may include a positive terminal and a negative terminal, and each cell stack 10 may be electrically connected to each other by a connection component 80 fastened to the terminal.

[0038] The housing 50 may provide a storage space for accommodating other components. Therefore, the housing 50 may be configured to wrap the entire battery cell stack 10 , and a plurality of battery cell stacks 10 may be arranged side by side in a plurality of rows in the storage space of the housing 50 .

[0039] The housing 50 may be made of a metal material to ensure rigidity, but is not limited thereto. In addition, in order to improve the heat dissipation effect, at least a portion of the housing 50 may be made of aluminum.

[0040] The housing 50 may include a side wall portion 51 forming an inner space, a lower plate 52 covering a lower portion of the inner space, and an upper plate 53 covering an upper portion of the inner space.

[0041] The side wall portion 51 may form an outer side surface of the case 50 and define an inner space. Therefore, the battery cell stack 10 may be accommodated in the inner space defined by the side wall portion 51 and seated on the lower plate 52.

[0042] The lower plate 52 may support the lower surface of the cell stack 10 and may cool the cell stack 10 at the same time.

[0043] The housing 50 may be provided with a partition plate 60 disposed to cross an inner space formed by the side wall portion 51 to partition the inner space into a plurality of accommodation spaces. Therefore, at least a portion of the partition plate 60 may be fastened to the side wall portion 51.

[0044] The separator 60 may be coupled to the case 50 to enhance the overall rigidity of the case 50. In addition, the separator 60 may be disposed between the cell stacks 10 to suppress the propagation of gas or flame between the cell stacks 10.

[0045] In this embodiment, the partition 60 can be respectively arranged between two battery cell stacks 10 arranged side by side. Both ends of the partition 60 can be fastened to the side wall portion 51 of the housing 50, or fastened to other partitions 60, so that the internal space formed by the side wall portion 51 can be divided into a plurality of accommodation spaces. Therefore, a plurality of battery cell stacks 10 can be respectively dispersedly arranged in a plurality of accommodation spaces divided by the side wall portion 51 and the partition 60.

[0046] The partition plate 60 may be welded to the housing 50 or may be fixed and fastened to the housing 50 by fastening means such as bolts, screws, etc.

[0047] The connection component 80 may be made of a conductive material to electrically connect the terminals of one cell stack 10 and another adjacent cell stack 10 to each other. To this end, the connection component 80 may include a bus bar or a cable. Both ends of the connection component 80 may be fastened to the terminals of the cell stack 10 by fastening components P such as bolts.

[0048] The cell stacks 10 of this embodiment can be connected in series or in parallel with each other through the connection member 80. In addition, as required, some of the cell stacks 10 can be connected in series, and some of the cell stacks 10 can be connected in parallel.

[0049] The connection member 80 according to the present embodiment can be made by processing a flat strip-shaped conductive member. In addition, the connection member 80 can be made of a material having flexibility. However, the configuration of the present invention is not limited thereto.

[0050] Reference Figure 7 , the connection members 80 of the present embodiment may be provided in pairs, such that the two connection members 80 face each other. However, the configuration of the present invention is not limited thereto.

[0051] The support member 70 may be disposed between the connection member 80 and the upper plate 53 , and may accommodate at least a portion of the connection member 80 therein.

[0052] Figure 3 yes Figure 2 An enlarged view of the support component shown in Figure 4 yes Figure 3 Exploded stereogram of Figure 5 yes Figure 3 Bottom stereogram of .

[0053] Also refer to Figures 3 to 5 , the support member 70 according to the present embodiment may include a conductive wire 78 , a buffer body 71 , and an insulating cover 75 .

[0054] The conductive wire 78 may include a wire material formed by insulating a conductor, and at least one of its two ends may be coupled to the battery cell stack 10. To this end, both ends of the conductive wire 78 may be coupled to a connector 79. The connector 79 may be coupled to a connector coupling portion 12 provided on the battery cell stack 10, so that the conductive wire 78 may be electrically connected to the battery cell stack 10.

[0055] Such conductive wires 78 may be used to connect cell monitoring units (CMUs) that monitor the voltage / temperature of the cells, or to electrically connect a battery management unit (BMU) that aggregates CMU monitoring information and manages the battery device as a whole to the CMU. However, the present invention is not limited thereto.

[0056] The buffer body 71 may be coupled to the above-mentioned connection member 80. To this end, a first surface, ie, a lower surface of the buffer body 71 may be provided with a first insertion groove 72a into which the connection member 80 is inserted.

[0057] The first insertion groove 72 a may be formed as a groove corresponding to the shape of the connection member 80 , and thus the connection member 80 may be partially or entirely inserted into the first insertion groove 72 a .

[0058] The first insertion groove 72a may be coupled to the connection member 80 in a form of completely covering the upper surface of the connection member 80. Therefore, when the connection member 80 and the buffer body 71 are coupled, the connection member 80 may not be exposed to the outside of the buffer body 71.

[0059] In the present embodiment, the connection member 80 may be coupled to the cell stack 10 by a fastening member P such as a bolt. Therefore, at least a portion of the fastening member P may protrude to an upper portion of the connection member 80 .

[0060] Therefore, the buffer body 71 may include an expansion slot 73 into which the fastening member P is inserted. The expansion slot 73 may be formed corresponding to the position where the fastening member P is provided. In addition, the horizontal cross-sectional area of ​​the expansion slot 73 may be the same as or slightly smaller than the horizontal cross-sectional area of ​​the fastening member P. In this case, the fastening member P may be tightly inserted into the expansion slot 73 without a gap, and thus may be stably coupled to the connecting member 80 even without an additional fixing member.

[0061] A second insertion groove 72 b may be provided on a second surface, ie, an upper surface, of the buffer body 71 .

[0062] The conductive wire 78 may be inserted into the second insertion groove 72 b. Therefore, the second insertion groove 72 b may be formed in a long narrow groove shape, and the width of the second insertion groove 72 b may be defined according to the thickness of the conductive wire 78.

[0063] Similar to the expansion slot 73 , the width of the second insertion slot 72 b may be the same as or slightly smaller than the thickness of the conductive wire 78 so that the conductive wire 78 is firmly coupled to the second insertion slot 72 b .

[0064] The buffer body 71 can be made of a material having electrical insulation properties, and can be made of a material that is elastically deformed under the action of an external force. Therefore, when the fastening component P is inserted into the expansion slot 73, the buffer body 71 can be elastically deformed, the cross-sectional area of ​​the expansion slot 73 can be expanded, and when the fastening component P is fully inserted into the expansion slot 73, the buffer body 71 can pressurize the fastening component P through a restoring force. Similarly, when the conductive wire 78 is inserted into the second insertion slot 72b, the buffer body 71 can be elastically deformed, the width of the second insertion slot 72b can be expanded, and when the conductive wire 78 is fully inserted into the second insertion slot 72b, the buffer body 71 can pressurize the conductive wire 78 through a restoring force. Therefore, the fastening component P inserted into the expansion slot 73 or the conductive wire 78 inserted into the second insertion slot 72b is not easily separated from the buffer body 71. On the other hand, this configuration is also applicable to the first insertion slot 72a.

[0065] The buffer body 71 may be made of a foamed material. Therefore, when the upper surface of the support member 70 is in close contact with the housing 50, the support member 70 may absorb the shaking or vibration of the housing 50. Therefore, the shaking of the housing 50 may be suppressed by the support member 70. For example, the buffer body 71 may be made of expanded polypropylene (EPP) formed by foaming a polyolefin-based polypropylene (PP) material, but is not limited thereto.

[0066] The insulation cover 75 may be coupled to the second surface of the buffer body 71 .

[0067] The insulating cover 75 may be coupled to the buffer body 71 in the form of covering the conductive wire 78 inserted into the second insertion groove 72b. Therefore, the conductive wire 78 inserted into the second insertion groove 72b is not easily separated from the second insertion groove 72b due to the insulating cover 75.

[0068] In addition, the insulating cover 75 may cover at least one of the side surfaces of the buffer body 71. Figure 6 and Figure 7 As shown, when two connection parts 80 are arranged side by side, at least a portion of the insulating cover 75 may be disposed between the two connection parts 80. Therefore, the insulating cover 75 may be disposed on the side facing the other connection part 80 among the sides of the buffer body 71. In addition, in order to improve the insulation reliability between the connection parts 80, the insulating cover 75 may be disposed on the entire area where the connection parts 80 face each other.

[0069] The insulating cover 75 is in direct contact with the upper plate 53 of the housing 50, and thus can be made of a material having electrical insulation. In addition, the insulating cover 75 of the present embodiment can be made of a material having flame retardancy or flame retardancy to prevent the flame or the heat caused by the flame from spreading to other battery cell stacks 10 during thermal runaway. Here, flame retardancy refers to the property of preventing the spread of combustion, and flame retardancy refers to the property of not being easy to burn even if a fire occurs. Therefore, the insulating cover 75 can have a combustibility that does not become a factor in the spread of combustion itself, or have a property that is not easy to burn.

[0070] For example, the insulating cover 75 of the present embodiment may include mica. Specifically, it may be formed by forming a sheet containing mica. The insulating cover 75 may be formed by a single sheet, but may also be formed by stacking sheets of different materials as required.

[0071] The insulating cover 75 may be bonded to the buffer body 71 by an adhesive member. The adhesive member may be an adhesive or an adhesive tape, but is not limited thereto.

[0072] The support member 70 of the present embodiment configured as described above may be disposed to contact the connection member 80 and the upper plate 53, respectively. For example, the entire upper surface of the support member 70 may contact the lower surface of the upper plate 53. As described above, since the buffer body 71 of the support member 70 is made of a foamed material, the support member 70 may absorb shaking or jittering of the upper plate 53.

[0073] A plurality of support members 70 may be dispersedly provided according to the arrangement structure of the cell stack 10. Therefore, in the battery device 1 of the present embodiment, the plurality of support members 70 can support the upper plate 53 at a plurality of points, thereby preventing a specific portion of the upper plate 53 from sagging.

[0074] In addition, each support member 70 is configured to wrap the respective connection member 80, and the insulating cover 75 is provided between the connection members 80 facing each other, thereby ensuring insulation between the connection members 80. Therefore, the connection members 80 can be prevented from contacting each other and short-circuiting in the event of thermal runaway.

[0075] In addition, the buffer body 71 of the support member 70 of the present embodiment is integrally formed with the conductive wire 78, so during the manufacturing process of the battery device 1, the conductive wire 78 can be fixed in the correct position by simply combining the support member 70 with the connecting member 80. Therefore, the manufacturing process can be simplified, thereby minimizing the manufacturing time.

[0076] On the other hand, the present invention is not limited to the above-described embodiments, and various modifications are possible.

[0077] Figure 8 is an exploded perspective view showing a supporting member according to another embodiment of the present invention, Fig. 9 yes Figure 8 A bottom perspective view of the support component shown in FIG.

[0078] Reference Figure 8 and Fig. 9 The supporting member 70 of this embodiment can be combined with a plurality of connecting members ( Figure 7 80), multiple conductive wires 78 can be combined with the second surface of the buffer body 71. Therefore, multiple first insertion grooves 72a can be provided to correspond to the arrangement structure of multiple connecting parts 80, and multiple second insertion grooves 72b can also be provided to combine multiple conductive wires 78.

[0079] In addition, the buffer body 71 of this embodiment may be provided with a third insertion groove 72c between the two first insertion grooves 72a, and the insulation cover 75 may be inserted into the third insertion groove 72c. The third insertion groove 72c may be formed in a long narrow groove form and may be formed in the entire area where the connection parts 80 face each other.

[0080] The insulation cover 75 may be formed to cover the entire second surface of the buffer body 71 , and at least a portion may be inserted into the third insertion groove 72 c .

[0081] In the battery device of the present embodiment configured as described above, one supporting member 70 can cover a plurality of connecting members 80 , and thus the manufacturing time can be further shortened.

[0082] The embodiments of the present invention are described in detail above, but the scope of the present invention is not limited thereto. It is obvious to those skilled in the art that various modifications and variations can be made without departing from the technical concept of the present invention.

[0083] For example, the above embodiment is described by taking the case where the connecting member 80 is disposed adjacent to each other as an example, but it is also possible to consider the case where the connecting member 80 is disposed adjacent to the side wall portion 51 of the housing 50. In this case, in order to insulate the connecting member 80 from the side wall portion 51, at least a portion of the insulating cover 75 may be disposed between the connecting member 80 and the side wall portion 51.

[0084] Furthermore, the various embodiments may be implemented in combination with each other.

Claims

1. A battery device comprising: A plurality of battery cell stacks are electrically connected to each other via a connecting component; A shell body, accommodating the plurality of battery cell stacks; as well as a supporting member, disposed between the connecting member and the housing to support the housing, The supporting member comprises: The buffer body is made of an insulating material and has a first insertion groove formed on a first surface, and the connecting component is inserted into the first insertion groove; a conductive wire inserted into a second insertion groove formed on a second surface of the buffer body and electrically connected to at least a portion of the plurality of battery cell stacks; and The insulating cover is coupled to the second surface of the buffer body.

2. The battery device according to claim 1, wherein: The insulating cover extends to wrap at least one of the side surfaces of the buffer body.

3. The battery device according to claim 1, wherein: The two connecting parts are arranged side by side with each other, At least a portion of the insulating cover is disposed between the two connecting members.

4. The battery device according to claim 1, wherein: The connecting member is fastened to the plurality of battery cell stacks by a fastening member, The buffer body includes an expansion groove into which the fastening member protruding to the outside of the connecting member is inserted.

5. The battery device according to claim 4, wherein: The buffer body is inserted and coupled to the fastening component.

6. The battery device according to claim 1, wherein: The buffer body is made of foamed polypropylene.

7. The battery device according to claim 1, wherein: The insulating cover is made of a sheet material containing mica.

8. The battery device according to claim 1, wherein: The second insertion groove is formed as a slot-shaped groove.

9. The battery device according to claim 1, wherein: Connectors are formed at both ends of the conductive wire, and the connectors are coupled to the plurality of battery cell stacks.

10. The battery device according to claim 1, wherein: The plurality of first insertion slots are spaced apart from each other. The buffer body includes a third insertion groove, and the third insertion groove is arranged between the first insertion grooves in a narrow groove form. At least a portion of the insulation cover is inserted into the third insertion groove.

11. A battery device comprising: A plurality of battery cell stacks are electrically connected to each other via a connecting component; A shell body, accommodating the plurality of battery cell stacks; as well as a supporting member, arranged between the connecting member and the housing, The supporting member is coupled to the connecting member to cover an upper surface of the connecting member, thereby ensuring insulation between the connecting member and the housing, The upper surface of the supporting member is in surface contact with the housing to suppress shaking of the housing.

12. The battery device according to claim 11, further comprising: A conductive wire, a portion of which is embedded in the support component, and both ends of which are exposed outside the support component so as to be respectively coupled to the plurality of battery cell stacks.

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