Battery pack and power device with same

Abstract

The utility model provides a battery pack and a power device with the battery pack, and the battery pack comprises a box body, a battery pack, a battery pack and a battery pack, the battery module is located in the containing cavity, the battery module comprises a plurality of single batteries which are arranged in a stacked mode in the first direction, an anti-explosion valve and a busbar are arranged on the surface of the same side of each single battery, and the anti-explosion valves and the busbars are arranged at intervals; and the partition plate is connected between the anti-explosion valve and the busbar in a sealing manner, so that the anti-explosion valve is not communicated with the busbar. According to the battery pack disclosed by the utility model, the partition plate is arranged and is used for isolating the explosion-proof valve from the busbar, so that the thermal runaway of the battery monomers can be prevented from being further intensified, the use safety of the battery pack is improved, meanwhile, the thermal protection cost of the battery pack can be reduced, and the production cost of the battery pack can be further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power device manufacturing, in particular to a battery pack and a power device having the same. Background Art

[0002] In the existing battery pack, in order to prevent the spray from the explosion-proof valve of the battery cell from spraying onto the bus, a thermal protection material is usually provided on the bus. However, the thermal protection material is expensive, which leads to an increase in the thermal protection cost of the battery pack, and further leads to an increase in the production cost of the battery pack, which is not conducive to the production of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery pack, which can reduce the production cost of the battery pack.

[0004] The utility model also provides a power device having the battery pack.

[0005] According to the battery pack of the embodiment of the utility model, it includes: a box body, a accommodating cavity is provided in the box body; a battery module, the battery module is located in the accommodating cavity, the battery module includes a plurality of battery cells stacked along a first direction, the battery cells are provided with an explosion-proof valve and a bus, the explosion-proof valve and the bus are formed on the same side surface of the battery module; a partition, the partition is sealed and connected between the explosion-proof valve and the bus to separate the explosion-proof valve and the bus.

[0006] According to the battery pack of the utility model, a partition is provided to isolate the explosion-proof valve and the bus bar, which can prevent the thermal runaway of the battery cell from further aggravating and improve the safety of the battery pack. At the same time, the thermal protection cost of the battery pack can be reduced, thereby reducing the production cost of the battery pack.

[0007] According to some embodiments of the present invention, the battery pack includes: a partition beam, the partition beam is disposed in the box body, the partition beam extends along a first direction, and the partition beam divides the accommodating cavity along a second direction.

[0008] According to some optional embodiments of the utility model, the battery modules are provided on both sides of the partition beam, and on the surface of one side adjacent to two battery modules, the explosion-proof valves and the bus bars of adjacent battery modules are arranged facing each other.

[0009] According to some embodiments of the present utility model, the busbar is arranged on the upper side of the explosion-proof valve, and in the up and down directions, the explosion-proof valve is not higher than the upper end surface of the partition beam.

[0010] According to some embodiments of the present invention, the partition is connected to the upper end of the partition beam, and both ends of the partition in the second direction are respectively abutted between the explosion-proof valve and the bus bar relative to the battery cell.

[0011] According to some optional embodiments of the present invention, the partition beam, the partition plate and the two adjacent battery modules define two exhaust channels on both sides of the partition beam.

[0012] According to some optional embodiments of the utility model, the battery pack also includes: a cross beam, which is arranged perpendicular to the partition beam, the cross beam is connected to the partition beam, the number of the cross beams is two, the two cross beams are respectively connected to the two ends of the partition beam, at least one of the cross beams is provided with an exhaust hole passing through the cross beam along the first direction, and the exhaust hole is connected to the exhaust channel.

[0013] According to some optional embodiments of the present invention, there are multiple exhaust holes, and the exhaust holes are aligned with and connected to the exhaust channel in the first direction.

[0014] According to some embodiments of the present invention, heat insulation members are provided on both side surfaces of the partition beam in the second direction.

[0015] The power device according to the embodiment of the second aspect of the utility model includes the battery pack according to the first aspect of the utility model.

[0016] According to the power device of the utility model, by setting the battery pack of the first embodiment mentioned above and setting a partition, the partition isolates the explosion-proof valve and the bus, which can prevent the thermal runaway of the battery cell from further aggravating, improve the safety of the battery pack, and at the same time, reduce the thermal protection cost of the battery pack, thereby reducing the production cost of the battery pack.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the first aspect of the utility model;

[0019] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 is along Figure 1 Sectional view along line BB.

[0021] Reference numerals:

[0022] 100. Battery pack;

[0023] 10. Box body;

[0024] 20. Battery module; 21. Battery cell; 211. Bus bar; 212. Explosion-proof valve;

[0025] 30. Partition;

[0026] 40. Separation beam;

[0027] 50. crossbeam; 51. exhaust hole;

[0028] 60. Exhaust channel. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] Please refer to the following Figure 1-3 A battery pack 100 according to an embodiment of the present invention is described.

[0031] Reference Figure 1 , Figure 2 and Figure 3 According to an embodiment of the present invention, a battery pack 100 includes a box body 10 , a battery module 20 and a partition 30 .

[0032] Specifically, the box body 10 is provided with a receiving cavity; the battery module 20 is located in the receiving cavity, and the battery module 20 includes a plurality of Figure 1 That is, the battery module 20 may include two, three or four or more battery cells 21, and the battery cells 21 are provided with explosion-proof valves 212 and bus bars 211, which are formed on the same side surface of the battery module 20, and the explosion-proof valves 212 and bus bars 211 are arranged at intervals; the partition 30 is sealed and connected between the explosion-proof valves 212 and the bus bars 211 to separate the explosion-proof valves 212 and the bus bars 211.

[0033] For example, Figure 1 , Figure 2 and Figure 3As shown, a receiving cavity is formed in the box body 10, and a battery module 20 is arranged in the receiving cavity. The battery module 20 includes a plurality of battery cells 21 stacked in the front-to-back direction. An explosion-proof valve 212 and a bus bar 211 are provided on the right side surface of the battery cell 21 of the left battery module 20. When two adjacent battery cells 20 are connected, one end of the bus bar 211 is connected to the positive pole of one of the battery cells 20, and the other end of the bus bar 212 is connected to the negative pole of the other battery cell 20.

[0034] The battery pack 100 of the utility model is provided with a partition 30, which isolates the explosion-proof valve 212 and the bus 211. When the battery cell 21 is in thermal runaway, the spray released from the explosion-proof valve 212 of the battery cell 21 can only be sprayed onto the partition 30, and the spray will not be sprayed onto the bus 211. In this way, short-circuit arcing phenomenon can be avoided in the bus 211, thereby preventing the thermal runaway of the battery cell 21 from further aggravation, thereby improving the safety of the battery pack 100. At the same time, compared with the solution of providing a thermal protection material on the bus 211 in the prior art, the partition 30 of this embodiment is low in cost and convenient for mass use, thereby reducing the thermal protection cost of the battery pack 100, thereby reducing the production cost of the battery pack 100.

[0035] According to the battery pack 100 of the embodiment of the utility model, a partition 30 is provided, and the partition 30 isolates the explosion-proof valve 212 and the bus 211, which can prevent the thermal runaway of the battery cell 21 from further aggravating, improve the safety of the battery pack 100, and at the same time, reduce the thermal protection cost of the battery pack 100, thereby reducing the production cost of the battery pack 100.

[0036] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , including: a partition beam 40, the partition beam 40 is arranged in the box body 10, and the partition beam 40 is arranged along a first direction (such as Figure 2 The partition beam 40 extends in a second direction (such as the front-to-rear direction shown in FIG. Figure 2 Thus, the partition beam 40 divides the accommodating cavity, making the layout of the accommodating cavity more reasonable and facilitating the placement of the battery module 20.

[0037] For example, Figure 2 and Figure 3 As shown, the partition beam 40 extends in the front-to-rear direction, and the partition beam 40 divides the accommodation chamber into two in the left-to-right direction.

[0038] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 3 , separating the two sides of the beam 40 (such as Figure 3The left and right sides of the partition beam 40 shown in the figure are both provided with battery modules 20, and on the adjacent side surface of two battery modules 20, the explosion-proof valves 212 and the busbars 211 of the adjacent battery modules 20 are arranged opposite to each other. Therefore, the explosion-proof valves 212 and the busbars 211 of the adjacent battery modules 20 are arranged opposite to each other, which can reduce the problem of leakage of the explosion-proof valves 212 under mechanical working conditions of the battery pack 100, thereby improving the protective effect of the box 10 on the battery modules 20.

[0039] For example, Figure 1 and Figure 3 As shown, battery modules 20 are provided on both sides of the partition beam 40. In the battery module 20 on the left, the explosion-proof valve 212 and the bus 211 of the battery cell 21 are arranged on the right side surface of the battery cell 21. In the battery module 20 on the right, the explosion-proof valve 212 and the bus 211 of the battery cell 21 are arranged on the left side surface of the battery cell 21.

[0040] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , bus 211 is arranged on the upper side of explosion-proof valve 212 (such as Figure 2 Thus, if the explosion-proof valve 212 is disposed on the upper side of the bus bar 211, when the battery module 20 is thermally runaway, the ejection of the battery cell 21 from the explosion-proof valve 212 will flow onto the bus bar 211. Therefore, the bus bar 211 is disposed on the upper side of the explosion-proof valve 212 to make the structural design reasonable and ensure the safety of the battery pack 100. In the up-down direction, the explosion-proof valve 212 does not exceed the upper end surface of the partition beam 40 (as shown in FIG. Figure 3 In this way, the explosion-proof valve 212 can be prevented from spraying the ejected material onto the battery cells 21 of the adjacent battery modules 20, thereby reducing the impact of thermal runaway of the battery module 20 on the adjacent battery module 20, thereby improving the safety of the battery pack 100.

[0041] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the partition 30 is connected to the upper end of the partition beam 40 (such as Figure 3 The partition plate 30 is disposed at the upper end of the partition beam 40 shown in FIG. Figure 3 The two ends of the partition 30 (in the left and right directions as shown) are respectively abutted between the explosion-proof valve 212 and the bus bar 211 of the relative battery cell 20. Therefore, the explosion-proof valve 212 and the bus bar 211 of the adjacent battery module 20 can be isolated by setting a partition 30, so that the number of partitions 30 can be reduced, and the production cost of the battery pack 100 can be reduced.

[0042] For example, Figure 2 and Figure 3As shown, the partition beam 40 is vertically arranged, the lower end of the partition beam 40 is connected to the box body 10, the upper end of the partition beam 40 extends upward, and the upper end surface of the partition beam 40 is higher than the explosion-proof valve 212, and the partition plate 30 is horizontally arranged at the upper end of the partition beam 40 along the left-right direction, the left end of the partition plate 30 is sealed and connected to the right side surface of the left battery module 20, and the right end of the partition plate 30 is sealed and connected to the left side surface of the right battery module 20.

[0043] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the partition beam 40, the partition plate 30 and the two adjacent battery modules 20 are on both sides of the partition beam 40 (such as Figure 3 Two exhaust passages 60 are defined on the left and right sides of the dividing beam 40 as shown.

[0044] In this way, the partition beam 40 can define two exhaust channels 60. This structural arrangement is reasonable and can also reduce costs. In addition, the exhaust of the battery modules 20 on both sides of the partition beam 40 does not affect each other, thereby effectively preventing the ejecta of a battery module 20 from thermal runaway from being sprayed onto the adjacent battery module 20, thereby achieving thermal and electrical separation, and effectively improving the safety of the battery pack 100. In addition, the exhaust channel 60 is arranged in the middle of the battery pack 100. When the two sides of the battery pack 100 are collided, the exhaust channel 60 can provide the battery module 20 with a moving space, thereby effectively avoiding damage to the battery module 20.

[0045] For example, Figure 2 and Figure 3 As shown, the partition beam 40 and the partition plate 30 form a T-shaped structure, and the two ends of the partition plate 30 are sealed and connected to the surface of the connected battery module 20. The left side of the partition beam 40, the battery module 20 on the left side and the left half of the partition plate 30 form an exhaust channel 60, and the right side of the partition beam 40, the battery module 20 on the right side and the right half of the partition plate 30 form another exhaust channel 60.

[0046] According to some optional embodiments of the present invention, referring to Figure 1 , Figure 2 and Figure 3 The battery pack 100 further includes: a crossbeam 50, the crossbeam 50 is arranged perpendicular to the partition beam 40, the crossbeam 50 is connected to the partition beam 40, the number of the crossbeam 50 is two, and the two crossbeams 50 are respectively connected to the two ends of the partition beam 40 (such as Figure 3 The front and rear ends of the partition beam 40 shown in the figure) are provided on at least one cross beam 50 along the first direction (such as Figure 1That is to say, one beam 50 may be provided with an exhaust hole 51 that penetrates the beam 50 along the first direction, or both beams 50 may be provided with an exhaust hole 51 that penetrates the beam 50 along the first direction, and the exhaust hole 51 is connected to the exhaust channel 60.

[0047] Therefore, the cross beam 50 can strengthen the strength of the box body 10 and prevent the box body 10 from being damaged. At the same time, the cross beam 50 can cooperate with the partition beam 40 to separate the accommodating cavity of the box body 10, thereby making the internal layout of the box body 10 more reasonable. Furthermore, the exhaust hole 51 of the cross beam 50 is connected to the exhaust channel 60, so that the gas in the exhaust channel 60 can be discharged from the accommodating cavity from the exhaust hole 51, thereby improving the safety performance of the battery pack 100.

[0048] For example, Figure 1 , Figure 2 and Figure 3 As shown, the cross beam 50 is extended in the left-right direction, and the two cross beams 50 are arranged at intervals in the front-back direction and are respectively connected to the front and rear ends of the partition beam 40. An exhaust hole 51 is provided on the front cross beam 50, and the exhaust hole 51 penetrates the cross beam 50 in the front-back direction.

[0049] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 3 The number of the exhaust holes 51 is multiple, that is, the number of the exhaust holes 51 is two, three, or four or more, and the exhaust holes 51 and the exhaust channel 60 are in the first direction (such as Figure 1 As a result, the gas in the exhaust passage can be directly discharged from the accommodating cavity through the exhaust hole 51, thereby increasing the exhaust rate and ensuring the safety of the battery module 20.

[0050] For example, Figure 1 and Figure 3 As shown, there are two exhaust channels 60, and the two exhaust holes 51 are arranged at intervals along the left-right direction. The exhaust hole 51 on the left is aligned and connected with the exhaust channel 60 on the left in the front-to-back direction, and the exhaust hole 51 on the right is aligned and connected with the exhaust channel 60 on the right in the front-to-back direction.

[0051] According to some embodiments of the present invention, referring to Figure 3 , the partition beam 40 is in the second direction (such as Figure 3 Since the ejection of the battery cell 21 from the explosion-proof valve 212 is high-temperature and high-pressure gas, the provision of a heat-insulating member on the partition beam 40 can effectively prevent the partition beam 40 from being damaged by the ejection, thereby increasing the service life of the partition beam 40.

[0052] According to the power device of the second embodiment of the utility model, Figure 1 , including the battery pack 100 of the first aspect of this embodiment.

[0053] According to the power device of the embodiment of the utility model, by setting the battery pack 100 of the first aspect embodiment mentioned above, a partition 30 is set, and the partition 30 isolates the explosion-proof valve 212 and the bus 211, which can prevent the thermal runaway of the battery cell 21 from further aggravating, improve the safety of the battery pack 100, and at the same time, reduce the thermal protection cost of the battery pack 100, thereby reducing the production cost of the battery pack 100.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A box body, wherein a receiving cavity is provided in the box body; A battery module, the battery module is located in the accommodating cavity, the battery module includes a plurality of battery cells stacked along a first direction, the battery cells are provided with explosion-proof valves and bus bars, the explosion-proof valves and bus bars are formed on the same side surface of the battery module, and the explosion-proof valves and bus bars are arranged at intervals; A partition is sealingly connected between the explosion-proof valve and the bus bar to isolate the explosion-proof valve from the bus bar.

2. The battery pack according to claim 1, characterized in that: The invention comprises a partition beam, wherein the partition beam is arranged in the box body, the partition beam extends along a first direction, and the partition beam partitions the accommodating cavity along a second direction.

3. The battery pack according to claim 2, characterized in that: The battery modules are arranged on both sides of the partition beam, and on the surface of one side adjacent to two battery modules, the explosion-proof valves and the busbars of the adjacent battery modules are arranged facing each other.

4. The battery pack according to claim 2 or 3, characterized in that: The bus bar is arranged on the upper side of the explosion-proof valve, and the explosion-proof valve is not higher than the upper end surface of the partition beam in the up and down direction.

5. The battery pack according to claim 3, characterized in that: The partition is connected to the upper end of the partition beam, and both ends of the partition in the second direction are respectively abutted between the explosion-proof valve and the bus bar relative to the battery cell.

6. The battery pack according to claim 5, characterized in that: The partition beam, the partition plate and the two adjacent battery modules define two exhaust channels on both sides of the partition beam.

7. The battery pack according to claim 6, characterized in that: Also includes: A crossbeam, wherein the crossbeam is arranged perpendicular to the partition beam, the crossbeam is connected to the partition beam, there are two crossbeams, the two crossbeams are respectively connected to the two ends of the partition beam, at least one of the crossbeams is provided with an exhaust hole penetrating the crossbeam along the first direction, and the exhaust hole is connected to the exhaust channel.

8. The battery pack according to claim 7, characterized in that: There are a plurality of exhaust holes, and the exhaust holes are aligned with and communicate with the exhaust channel in the first direction.

9. The battery pack according to claim 2, characterized in that: The partition beam is provided with heat insulating members on both side surfaces in the second direction.

10. A power device, characterized in that: Comprising a battery pack according to any one of claims 1-9.

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