Box body and battery pack with same

Abstract

The utility model discloses a box body and a battery pack with the box body. The box body comprises a box main body, the two partition plates are arranged in the box main body and arranged up and down, the space in the box main body is divided into a discharge channel and two battery cabins by the two partition plates, the discharge channel is formed between the two partition plates, the two battery cabins are formed on the upper side and the lower side of the discharge channel respectively, and the battery cabins are used for containing single batteries; an exhaust hole penetrating through the partition plate in the vertical direction is formed in the partition plate; the baffle is arranged in the battery compartment, an exhaust channel is arranged between the baffle and the partition plate, the exhaust channel is communicated with the exhaust channel through the exhaust hole, at least part of the baffle forms a structure weak area, and the structure weak area is suitable for being opposite to an anti-explosion valve of the battery monomer arranged on the side, away from the exhaust channel, of the baffle. According to the box body disclosed by the utility model, the probability that thermal runaway spreads between the battery packs in the two battery cabins can be reduced, so that the safety of the battery pack is improved.

Description

Technical Field

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

[0002] In some battery packs, in order to utilize space and achieve energy storage capacity, a double-layer battery pack structure is used. In related technologies, when thermal runaway occurs in one layer of the battery pack, it is easy to spread to another layer, thereby reducing the safety 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 box body, which can improve the safety of the battery pack.

[0004] The utility model also provides a battery pack having the box body.

[0005] According to the first aspect of the utility model, the box body is used for a battery pack, and the box body includes: a box body; two partitions, the two partitions are arranged in the box body and arranged up and down, the two partitions divide the space in the box body into a discharge channel and two battery compartments, the discharge channel is formed between the two partitions, and the two battery compartments are respectively formed on the upper and lower sides of the discharge channel, the battery compartment is used to accommodate battery cells, and exhaust holes are formed on the partitions and pass through the partitions in the up and down directions; a baffle, the baffle is arranged in the battery compartment, an exhaust channel is provided between the baffle and the partition, the exhaust channel is connected to the exhaust channel through the exhaust hole, at least a part of the baffle is formed as a structural weak area, and the structural weak area is suitable for being opposite to the explosion-proof valve of the battery cell arranged on the side of the baffle away from the exhaust channel.

[0006] According to the box body of the first aspect of the utility model, when the battery pack in one of the battery compartments experiences thermal runaway, the partition and the baffle can prevent the high-temperature and high-pressure gas from spreading to the other battery compartment, thereby reducing the probability of thermal runaway spreading between the battery packs in the two battery compartments and improving the safety of the battery pack. In addition, the two battery compartments share a discharge channel, which can improve the space utilization rate in the box body.

[0007] According to some embodiments of the utility model, the baffle and the partition are arranged in an upper and lower spacing, and the baffle and the partition cooperate to define the exhaust channel; and / or the spacing between the baffle and the partition is 5mm-15mm.

[0008] According to some embodiments of the present utility model, the box body further includes: a support member, wherein the support member is supported between the baffle plate and the partition plate.

[0009] According to some embodiments of the present invention, a support groove is formed on a side of the partition plate facing the baffle plate, and the support member is disposed in the support groove.

[0010] According to some embodiments of the present invention, the exhaust hole is formed in the support groove and passes through the bottom wall of the support groove in the up-down direction.

[0011] According to some embodiments of the present invention, the exhaust holes on the two partitions are staggered in the horizontal direction.

[0012] According to some embodiments of the present invention, the baffle is a mica board.

[0013] According to some embodiments of the utility model, an opening is formed on the box body and passes through the box body along the thickness direction, and the opening is connected to the exhaust channel. The box body also includes: a side cover and a pressure relief mechanism, the side cover is arranged at the opening, and the pressure relief mechanism is arranged on the side cover.

[0014] According to some embodiments of the utility model, the box body also includes: an electrical compartment, which is arranged on one side of the battery compartment in the horizontal direction, and a wiring hole connecting the electrical compartment and the battery compartment is formed on the side wall of the electrical compartment facing the battery compartment.

[0015] The battery pack according to the second aspect of the present invention comprises: the box body according to the first aspect of the present invention; two battery groups, wherein the battery groups are arranged in the battery compartment, and the battery groups include multiple battery cells, and at least part of the explosion-proof valves of the multiple battery cells are arranged toward the baffle.

[0016] According to the battery pack of the second aspect of the present invention, the safety of the battery pack can be improved by providing the box body according to the first aspect of the present invention.

[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 an exploded view of a battery pack according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 An exploded view of the battery pack from another angle shown in FIG.

[0020] Figure 3 yes Figure 1 An exploded view of a box according to an embodiment of the utility model;

[0021] Figure 4 yes Figure 3 An exploded view of the box body, partitions, baffles, electrical compartments and supports shown in FIG;

[0022] Figure 5 yes Figure 4 Schematic diagram of the box body, partition and electrical compartment shown in .

[0023] Reference numerals:

[0024] 1000, battery pack;

[0025] 100, box body;

[0026] 10. Box body;

[0027] 20. partition; 21. exhaust hole; 22. support groove;

[0028] 30. Exhaust channel;

[0029] 40. Battery compartment; 41. Battery cover;

[0030] 50. Baffle;

[0031] 60. Supporting member;

[0032] 70. Side cover; 71. Pressure relief mechanism;

[0033] 80. Electrical compartment; 81. Wiring hole; 82. Electrical cover;

[0034] 200, battery pack; 210, battery cell. DETAILED DESCRIPTION

[0035] 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.

[0036] Reference below Figure 1-Figure 5 The box 100 according to the first embodiment of the utility model is described.

[0037] like Figure 1 , Figure 3 and Figure 5 As shown, the box body 100 according to the embodiment of the first aspect of the utility model is used for a battery pack 1000 , and the box body 100 includes: a box body 10 , two partitions 20 and a baffle 50 .

[0038] Specifically, two partitions 20 are provided in the box body 10 and arranged up and down. The two partitions 20 divide the space in the box body 10 into an exhaust channel 30 and two battery compartments 40. The exhaust channel 30 is formed between the two partitions 20. The two battery compartments 40 are respectively formed on the upper and lower sides of the exhaust channel 30. The battery compartment 40 is used to accommodate a battery cell 210. An exhaust hole 21 is formed on the partition 20 and passes through the partition 20 in the up and down directions. The baffle 50 is provided in the battery compartment 40. An exhaust channel is provided between the baffle 50 and the partition 20. The exhaust channel is connected to the exhaust channel 30 through the exhaust hole 21. At least a portion of the baffle 50 is formed as a structurally weak area, and the structurally weak area is suitable for being opposite to the explosion-proof valve of the battery cell 210 arranged on the side of the baffle 50 away from the exhaust channel.

[0039] When the battery pack 1000 is assembled, two battery groups 200 are arranged in two battery compartments 40, and the battery group 200 includes a plurality of battery cells 210. During the use of the battery pack 1000, when a battery cell 210 in one of the battery compartments 40 experiences thermal runaway, the explosion-proof valve of the battery cell 210 will be in an open state, and high-temperature and high-pressure gas will be ejected from the explosion-proof valve of the battery cell 210, and the high-temperature and high-pressure gas will break through the structural weak area on the baffle 50 and enter the exhaust channel, and then be discharged from the battery pack 1000 from the exhaust channel 30 through the exhaust hole 21.

[0040] It is understandable that when high-temperature and high-pressure gas spreads into a battery compartment 40 where thermal runaway has not occurred, the high-temperature and high-pressure gas can easily cause thermal runaway of the battery cells 210 in the battery compartment 40 where thermal runaway has not occurred.

[0041] In the present embodiment, in the battery compartment 40 where thermal runaway occurs, the partition 20 and the baffle 50 can limit the movement path of the high-temperature and high-pressure gas to prevent the high-temperature and high-pressure gas from directly rushing to the battery compartment 40 where thermal runaway does not occur. In the battery compartment 40 where thermal runaway does not occur, the partition 20 and the baffle 50 can prevent the high-temperature and high-pressure gas from flowing in. Thereby, the probability of thermal runaway spreading between the two battery compartments 40 can be reduced, thereby improving the safety of the battery pack 1000.

[0042] The two battery compartments 40 share one exhaust channel 30, so that the high-temperature and high-pressure gas in the two battery compartments 40 can be exhausted through the exhaust channel 30, and there is no need to set up exhaust channels 30 separately for the two battery compartments 40, thereby improving the space utilization rate in the box 100. In addition, the two partitions 20 define the exhaust channel 30, and the structure of the box 100 is relatively simple, which can reduce the difficulty of product design and production, thereby reducing production costs.

[0043] According to the box body 100 of the embodiment of the first aspect of the utility model, when thermal runaway occurs in one of the battery compartments 40, the partition 20 and the baffle 50 can prevent the high-temperature and high-pressure gas from spreading to the other battery compartment 40, thereby reducing the probability of thermal runaway spreading between the battery packs 200 in the two battery compartments 40 and improving the safety of the battery pack 1000. In addition, the two battery compartments 40 share a discharge channel 30, which can improve the space utilization rate in the box body 100.

[0044] In some embodiments of the utility model, the baffle 50 and the partition 20 are arranged in an upper and lower space, and the baffle 50 and the partition 20 cooperate to define an exhaust channel. In this way, the exhaust channel can cover the area where the battery cell 210 is located in the battery compartment 40. When the battery cell 210 has thermal runaway, the high-temperature and high-pressure gas generated by the battery cell 210 can break through the structural weak area on the baffle 50 and directly enter the exhaust channel, so that the exhaust in the battery compartment 40 is more timely, and the volume of the exhaust channel is larger, which can provide a buffer for the high-temperature and high-pressure gas and reduce the impact of the high-temperature and high-pressure gas on the bottom wall of the battery compartment 40. Therefore, the safety of the battery pack 1000 can be further improved. In addition, the structure of the exhaust channel is relatively simple, which can reduce the difficulty of product design and production, thereby reducing production costs.

[0045] In some embodiments of the present invention, the spacing between the baffle 50 and the partition 20 is 5 mm-15 mm. For example, the spacing between the baffle 50 and the partition 20 can be 5 mm, 7 mm, 10 mm, 12 mm or 15 mm. In this way, it can be ensured that the exhaust efficiency of the exhaust channel meets the use requirements, and the exhaust channel does not occupy a large space. In the process of generating the design, the spacing between the baffle 50 and the partition 20 can be adjusted according to the use requirements, so as to meet more product design requirements.

[0046] In some embodiments of the present invention, Figure 2-Figure 4 As shown, the box 100 further includes: a support member 60, and the support member 60 is supported between the baffle 50 and the partition 20. In this way, the baffle 50 and the partition 20 can be arranged in an upper and lower interval, wherein, preferably, there can be a plurality of support members 60, for example, there can be two, three or four support members 60, and the plurality of support members 60 are supported between the baffle 50 and the partition 20 at intervals, so that the plurality of support members 60 can provide support at different positions, thereby improving the stability of the baffle 50 on the partition 20.

[0047] In some embodiments of the present invention, Figure 4 and Figure 5As shown, a support groove 22 is formed on one side of the partition 20 facing the baffle 50, and the support member 60 is disposed in the support groove 22. By providing the support groove 22, during the assembly process, the support groove 22 can position the support member 60, thereby improving the assembly efficiency and assembly accuracy. After the assembly is completed, the support groove 22 can limit the displacement of the support member 60, thereby further improving the stability of the baffle 50 on the partition 20.

[0048] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the exhaust hole 21 is formed in the support groove 22 and penetrates the bottom wall of the support groove 22 in the up-down direction. It can be understood that the bottom wall of the support groove 22 is relatively thin, so that the difficulty of opening the exhaust hole 21 can be reduced, and the damage to the structure of the partition 20 can be reduced, thereby improving the support strength of the partition 20.

[0049] In some embodiments of the present invention, the exhaust holes 21 on the two partitions 20 are staggered in the horizontal direction. In this way, when high-temperature and high-pressure gas is ejected from the exhaust hole 21 on one of the partitions 20, the high-temperature and high-pressure gas will not be directly ejected into the exhaust hole 21 on the other partition 20, thereby further improving the safety of the battery pack 1000.

[0050] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, the exhaust hole 21 is rectangular or circular. During the product design process, the size or shape of the exhaust hole 21 can be adjusted to meet more product design requirements.

[0051] In some embodiments of the present invention, the baffle 50 is a mica board. The mica board has good insulation and is easy to break, thereby meeting the insulation requirements of the battery pack 1000, and when the battery cell 210 has thermal runaway, the high-temperature and high-pressure gas can more easily break through the baffle 50 and enter the exhaust channel, thereby improving the reliability and safety of the battery pack 1000 during operation.

[0052] In some embodiments of the present invention, Figure 1-Figure 3 As shown, an opening is formed on the box body 10 that passes through the box body 10 in the thickness direction, and the opening is connected to the discharge channel 30. The box body 100 also includes: a side cover 70 and a pressure relief mechanism 71. The side cover 70 is provided at the opening, and the pressure relief mechanism 71 is provided on the side cover 70. When a battery cell 210 in the battery compartment 40 has thermal runaway, after the high-temperature and high-pressure gas enters the discharge channel 30, the pressure relief mechanism 71 is in an open state under the action of the high-temperature and high-pressure gas, so that the high-temperature and high-pressure gas can be discharged from the discharge channel 30.

[0053] In some embodiments of the present invention, Figure 1-Figure 3As shown, the box body 100 further includes a battery cover 41 , which is openably disposed on a side of the battery compartment 40 away from the discharge channel 30 , thereby facilitating maintenance of the battery pack 200 in the battery compartment 40 .

[0054] In some embodiments of the present invention, Figure 1 , Figure 4 and Figure 5 As shown, the box body 100 further includes: an electrical compartment 80, which is arranged on one side of the battery compartment 40 in the horizontal direction, and a wiring hole 81 connecting the electrical compartment 80 and the battery compartment 40 is formed on the side wall of the electrical compartment 80 facing the battery compartment 40. The electrical compartment 80 is used to arrange the electrical equipment on the battery pack 1000, and the battery pack 200 in the battery compartment 40 is electrically connected to the electrical equipment in the electrical compartment 80 through the wiring hole 81, and the current is converged in the electrical compartment 80. When thermal runaway occurs in the battery compartment 40, the side wall between the battery compartment 40 and the electrical compartment 80 can prevent the thermal runaway from spreading to the electrical compartment 80, thereby further improving the safety of the battery pack 1000.

[0055] In some embodiments of the present invention, Figure 1 As shown, the box body 100 further includes: an electrical cover plate 82, which is openably arranged on a side of the electrical compartment 80 away from the battery compartment 40, so that the electrical equipment in the electrical compartment 80 can be inspected and repaired more conveniently.

[0056] Reference below Figure 1-Figure 5 A battery pack 1000 according to an embodiment of the second aspect of the utility model is described.

[0057] like Figure 1-Figure 3 As shown, the battery pack 1000 according to the second embodiment of the utility model comprises: the box body 100 according to the first embodiment of the utility model and two battery packs 200. The battery pack 200 is arranged in the battery compartment 40, and the battery pack 200 comprises a plurality of battery cells 210, and at least part of the explosion-proof valves of the plurality of battery cells 210 are arranged toward the baffle 50.

[0058] According to the battery pack 1000 of the second embodiment of the utility model, the safety of the battery pack 1000 can be improved by providing the box body 100 according to the first embodiment of the utility model.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 box, which is used for a battery pack, characterized in that: include: Box body; Two partitions, the two partitions are arranged in the box body and arranged up and down, the two partitions divide the space in the box body into a discharge channel and two battery compartments, the discharge channel is formed between the two partitions, the two battery compartments are formed on the upper and lower sides of the discharge channel respectively, the battery compartment is used to accommodate battery cells, and the partition is formed with exhaust holes that penetrate the partition in the up and down direction; A baffle, wherein the baffle is arranged in the battery compartment, an exhaust channel is provided between the baffle and the partition, the exhaust channel is connected to the exhaust channel through the exhaust hole, at least part of the baffle is formed as a structural weak area, and the structural weak area is suitable for being opposite to the explosion-proof valve of the battery cell arranged on the side of the baffle away from the exhaust channel.

2. The box according to claim 1, characterized in that: The baffle plate and the partition plate are arranged in an upper and lower spaced relationship, and the baffle plate and the partition plate cooperate to define the exhaust channel; and / or, the spacing between the baffle plate and the partition plate is 5mm-15mm.

3. The box according to claim 2, characterized in that: Also includes: A support member is supported between the baffle and the partition.

4. The box according to claim 3, characterized in that: A support groove is formed on one side of the partition plate facing the baffle plate, and the support member is arranged in the support groove.

5. The box according to claim 4, characterized in that: The exhaust hole is formed in the supporting groove and passes through the bottom wall of the supporting groove in the up-down direction.

6. The box according to claim 1, characterized in that: The exhaust holes on the two partitions are staggered in the horizontal direction.

7. The box according to claim 1, characterized in that: The baffle is a mica plate.

8. The box according to claim 1, characterized in that: The box body is formed with an opening penetrating the box body in the thickness direction, and the opening is communicated with the discharge channel. The box body further comprises: a side cover and a pressure relief mechanism, wherein the side cover is arranged at the opening, and the pressure relief mechanism is arranged on the side cover.

9. The box according to any one of claims 1 to 8, characterized in that: Also includes: The electrical compartment is arranged on one side of the battery compartment in the horizontal direction, and a wiring hole connecting the electrical compartment and the battery compartment is formed on the side wall of the electrical compartment facing the battery compartment.

10. A battery pack, characterized in that: include: The box body according to any one of claims 1 to 9; Two battery packs are arranged in the battery compartment, the battery packs include a plurality of battery cells, and at least part of the explosion-proof valves of the plurality of battery cells are arranged toward the baffle.

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