Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack comprises a box body and a plurality of battery monomers, the box body comprises a first plate and a second plate, the first plate is provided with a first channel and a first exhaust hole, and the first exhaust hole is communicated with the first channel; the second plate is arranged on the side, provided with the first exhaust hole, of the first plate, connected with the first plate and used for defining a containing cavity. The second plate is provided with a second channel, a third exhaust hole and a plurality of second exhaust holes, and the second exhaust holes penetrate through one side of the second plate and communicate with the second channel; the third exhaust hole is hermetically communicated with the second channel and the first exhaust hole; the second plate can move to adjust the size of the containing cavity, the multiple battery monomers are arranged in the containing cavity, the two sides of each battery monomer are provided with an electrode terminal and a pressure relief part respectively, and the side, provided with the pressure relief part, of each battery monomer is connected with the side, provided with the second exhaust hole, of the second plate; at least part of the orthographic projection of each pressure relief piece on the second plate piece is located in one second exhaust hole.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and an electrical device. Background Technology

[0002] For moduleless battery packs, the side beams and middle beams of the housing form a cavity to limit and fix the individual battery cells, thereby achieving structural stability of the battery pack. However, for this type of battery pack, a housing of one structural size can only accommodate one size of battery cell, which makes the battery housing inflexible and unfavorable for battery pack production. Utility Model Content

[0003] The purpose of this utility model is to provide a battery pack that solves the problem that existing battery boxes can only accommodate one size of battery cell, which makes the battery box inflexible and detrimental to the production of battery packs; another purpose of this application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of this application has intersecting first and second directions, including:

[0005] A housing having at least one receiving cavity, the housing comprising:

[0006] The first plate has a first channel and a first vent hole. The first vent hole penetrates the first plate along the first direction on the side near the receiving cavity and communicates with the first channel.

[0007] A second plate is disposed on the side of the first plate where the first vent hole is located. The second plate is connected to the first plate to form the receiving cavity. The second plate has a second channel, a third vent hole, and a plurality of second vent holes spaced apart along the first direction. The second channel extends along the first direction. The second vent holes penetrate the second plate along one side of the second plate along the second direction and communicate with the second channel. The third vent holes penetrate the second plate near the first plate and communicate with the second channel. The second plate is movable along the second direction, and the third vent hole is in sealed communication with the first vent hole.

[0008] A plurality of battery cells arranged along the first direction are disposed in the receiving cavity; the battery cells are respectively provided with electrode terminals and pressure relief components on both sides along the second direction, the side of the battery cell with the pressure relief component is connected to the side of the second plate with the second vent hole, and at least a portion of the orthographic projection of each pressure relief component on the second plate is located in one of the second vent holes.

[0009] In some embodiments,

[0010] The first plate has a first groove, which is located on the side of the first plate facing the second plate. The first vent hole penetrates the bottom of the first groove and communicates with the first groove.

[0011] The second plate includes:

[0012] The first body has a second vent that penetrates one side of the first body along the second direction;

[0013] The first slider is connected to the side of the first body facing the first plate. The first slider is inserted into the first groove and can slide in the first groove along the second direction. The second channel passes through the side of the first body near the first plate. The third vent passes through the first slider and communicates with the second channel.

[0014] In some embodiments,

[0015] The first plate has a second slide groove, which is disposed on the side of the first plate facing the second plate. The second slide groove is disposed on one side of the first slide groove along the second direction and communicates with the first slide groove.

[0016] The second plate also includes a second slider, which is connected to one side of the first slider. The second slider is inserted into the second groove and can slide in the second groove along the second direction.

[0017] In some embodiments,

[0018] The first plate has a third slide groove, which is disposed along the second direction on the side of the first slide groove away from the second slide groove and communicates with the first slide groove;

[0019] The second plate includes a third slider, which is connected to the side of the first slider away from the second slider along the second direction. The third slider is inserted into the third groove and can move in the third groove along the second direction.

[0020] In some embodiments, the battery pack further has a third direction intersecting the first direction and the second direction, the third vent hole having a dimension along the second direction that is greater than the dimension of the first vent hole along the second direction, and the dimension of the third vent hole having a dimension along the third direction that is less than or equal to the dimension of the first channel; along the first direction, the orthographic projection of the first slider on the first plate covers the first vent hole, and the third vent hole communicates with the first vent hole.

[0021] In some embodiments, along the second direction, the size of the first slider is smaller than the size of the first groove, the sum of the size of the first slider and the size of the second slider is greater than the size of the first groove, and the sum of the size of the first slider and the size of the third slider is greater than the size of the first groove; along the third direction, the size of the first groove is greater than the size of the second groove, and the size of the first groove is greater than the size of the third groove.

[0022] In some embodiments, the housing further includes a third plate, which is disposed along the first direction on the side of the second plate away from the first plate, and a fourth sliding groove is provided on the side of the third plate close to the second plate, the fourth sliding groove extending along the second direction; the second plate further includes a fourth slider, which is inserted into the fourth sliding groove and is capable of sliding along the second direction within the fourth sliding groove.

[0023] In some embodiments,

[0024] The housing further includes a fourth plate, which is disposed opposite to the second plate along the second direction; a fifth groove is provided on the side of the fourth plate facing the second plate; the first plate, the second plate, the third plate, and the fourth plate form a receiving cavity;

[0025] The third plate includes a second body and a fifth slider. The fourth slide groove is disposed on the side of the second body facing the second plate, and the fifth slider is disposed on the side of the second body close to the fourth plate. The fifth slider is inserted into the fifth slide groove and can move in the fifth slide groove along the first direction.

[0026] In some embodiments,

[0027] The enclosure also includes:

[0028] The fifth plate is disposed on the side of the second plate away from the fourth plate. The fifth plate, the first plate, the second plate, and the third plate form a receiving cavity. The fifth plate has a sixth sliding groove on the side facing the second plate. The third plate also includes a sixth slider. The sixth slider is connected to the side of the second body away from the fifth slider. The sixth slider is inserted into the sixth sliding groove and can move in the sixth sliding groove along the first direction.

[0029] Multiple second plates are spaced apart between the fifth plate and the fourth plate along the second direction, and multiple second exhaust holes are provided on both sides of the second plates along the second direction;

[0030] The first plate has a plurality of first exhaust holes, the plurality of first exhaust holes are spaced apart along the second direction, the plurality of second plates are all connected to the first plate, and the third exhaust hole of each second plate is sealed and connected to one of the first exhaust holes;

[0031] A battery pack is formed by multiple battery cells arranged along the first direction. The battery pack includes multiple battery cells arranged along the second direction. Two adjacent battery cells are disposed on both sides of a second plate along the second direction. The pressure relief device of each battery cell in the two battery cells is disposed facing the second plate, and the pressure relief device is disposed opposite to a second vent hole.

[0032] In some embodiments, the first plate further has a pressure relief hole, which is located on the side of the first plate away from the second plate and communicates with the first channel;

[0033] The enclosure also includes an explosion-proof valve, which is connected to the first plate and covers the pressure relief hole.

[0034] Accordingly, the electrical device described in this application includes a battery pack as described in any of the foregoing embodiments.

[0035] Beneficial Effects: Compared with the prior art, a battery pack according to an embodiment of this application has intersecting first and second directions, including a housing and a plurality of battery cells arranged along the first direction. The housing has at least one receiving cavity. The housing includes a first plate and a second plate. The first plate has a first channel and a first vent hole. The first vent hole penetrates the side of the first plate along the first direction near the receiving cavity and communicates with the first channel. The second plate is disposed on the side of the first plate with the first vent hole and is connected to the first plate to form a receiving cavity. The second plate has a second channel, a third vent hole, and a plurality of second rows of batteries spaced apart along the first direction. A second vent is provided, extending along a first direction. A second vent penetrates one side of the second plate along the second direction and communicates with the second channel. A third vent penetrates the side of the second plate near the first plate and communicates with the second channel. The second plate is movable along the second direction, and the third vent is sealed and communicates with the first vent. Multiple battery cells arranged along the first direction are disposed in a receiving cavity. Each battery cell has an electrode terminal and a pressure relief component on both sides along the second direction. The side of the battery cell with the pressure relief component is connected to the side of the second plate with the second vent. At least a portion of the orthographic projection of each pressure relief component on the second plate is located within a second vent. This application, by providing a first channel and a first vent on the first plate, and by providing a second channel, a second vent, and a third vent on the second plate, and utilizing the communication between the third vent and the first vent, enables thermal runaway gas to escape into the channel inside the housing and ultimately exit the battery pack, improving the safety of the battery pack and effectively preventing thermal runaway of a single battery cell from affecting adjacent battery cells. Meanwhile, the horizontal arrangement of the battery cells can reduce the height of the battery pack along the third direction, which is beneficial to improving the volumetric energy density of the battery pack.

[0036] Compared with the prior art, an electrical device according to an embodiment of this application includes a battery pack as described in any of the foregoing embodiments. It is understood that the electrical device according to an embodiment of this application includes all the technical features and effects of the battery packs described in the foregoing embodiments, and will not be repeated here. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the overall structure of a battery pack according to an embodiment of this application;

[0039] Figure 2 This is an exploded view of a battery pack according to an embodiment of this application;

[0040] Figure 3 This is a top view of a battery pack according to an embodiment of this application;

[0041] Figure 4 yes Figure 3 A sectional view along section line AA;

[0042] Figure 5 yes Figure 4 Part A is an enlarged view;

[0043] Figure 6 yes Figure 3 A sectional view along section line BB;

[0044] Figure 7 This is a schematic diagram of the structure of a battery pack housing according to an embodiment of this application;

[0045] Figure 8 This is a schematic diagram of the structure of a first plate component according to an embodiment of this application;

[0046] Figure 9 yes Figure 8 Enlarged view of section B;

[0047] Figure 10 This is a schematic diagram of the structure of a second plate near the end of the first plate according to an embodiment of this application;

[0048] Figure 11 This is a schematic diagram of a first plate component facing away from the second plate component according to an embodiment of this application;

[0049] Figure 12 This is a schematic diagram of the structure of a second plate component according to an embodiment of this application;

[0050] Figure 13 This is a cross-sectional view of a second plate component according to an embodiment of this application;

[0051] Figure 14 This is a cross-sectional view of a third plate component according to an embodiment of this application;

[0052] Figure 15 This is a schematic diagram of the structure of a fourth plate component according to an embodiment of this application;

[0053] Figure 16 This is a schematic diagram of the structure of a fourth plate component according to an embodiment of this application.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. Housing; 11. Receiving cavity; 12. First plate; 121. First channel; 122. First vent; 123. First slide groove; 124. Second slide groove; 125. Third slide groove; 126. Pressure relief hole; 13. Second plate; 131. Second channel; 132. Second vent; 133. Third vent; 134. First body; 135. First slider; 136. Second slider; 137. Third slider; 138. Fourth slider; 14. Third plate; 141. Fourth slide groove; 142. Second body; 143. Fifth slider; 144. Sixth slider; 15. Fourth plate; 151. Fifth slide groove; 16. Fifth plate; 161. Sixth slide groove; 17. Explosion-proof valve; 2. Battery cell; 21. Electrode terminal; 22. Pressure relief component; 20. Battery pack; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0057] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, the range of included angles from 80° to 100° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, the range of completely parallel angles from 10° is considered parallel.

[0058] It should also be noted that in the accompanying drawings of this application, arrows labeled X indicate the first direction X, arrows labeled Y indicate the second direction Y, and arrows labeled Z indicate the third direction Z. The introduction of the first direction X, the second direction Y, and the third direction Z is to facilitate the description of the structural positional relationships of the battery pack, thereby making it easier to understand its structure. In the embodiments of this application, the first direction X is the arrangement direction of the multiple battery cells 2, and also the extension direction of the second plate 13; the second direction Y is the arrangement direction of the second plate 13 and the battery cells 2; and the third direction Z is the height direction of the battery pack; furthermore, the first direction X, the second direction Y, and the third direction Z intersect each other, and are perpendicular to each other.

[0059] In related technologies, new energy vehicles powered by batteries have developed rapidly due to their advantages over gasoline vehicles, such as energy saving, low pollution, and high efficiency. However, in practical applications, battery systems may overheat and cause thermal runaway. Conventional solutions involve top or bottom venting of the battery pack, which requires additional venting components and channels. This increases the size of the battery pack along the Z-axis, occupies internal space, and affects the volumetric energy density of the battery pack.

[0060] In view of this, embodiments of this application provide a battery pack and a power-consuming device, which aim to solve the above-mentioned problems.

[0061] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 12A battery pack according to an embodiment of this application has intersecting first direction X and second direction Y, including a housing 1 and a plurality of battery cells 2 arranged along the first direction X. The housing 1 has at least one receiving cavity 11. The housing 1 includes a first plate 12 and a second plate 13. The first plate 12 has a first channel 121 and a first vent 122. The first vent 122 penetrates the side of the first plate 12 along the first direction X near the receiving cavity 11 and communicates with the first channel 121. The second plate 13 is disposed on the side of the first plate 12 with the first vent 122. The second plate 13 is connected to the first plate 12 to form a receiving cavity 11. The second plate 13 has a second channel 131, a third vent 133 and a plurality of second vents 132 spaced apart along the first direction X. Channel 131 extends along the first direction X. Second vent 132 penetrates one side of the second plate 13 along the second direction Y and communicates with the second channel 131. Third vent 133 penetrates the side of the second plate 13 near the first plate 12 and communicates with the second channel 131. The second plate 13 is movable along the second direction Y, and the third vent 133 is sealed and communicated with the first vent 122. Multiple battery cells 2 arranged along the first direction X are disposed in the receiving cavity 11. The battery cells 2 are respectively provided with electrode terminals 21 and pressure relief components 22 on both sides along the second direction Y. The side of the battery cell 2 with pressure relief components 22 is connected to the side of the second plate 13 with second vent 132. At least a portion of the orthographic projection of each pressure relief component 22 on the second plate 13 is located in a second vent 132.

[0062] In this embodiment, by providing a first channel 121 and a first vent 122 on the first plate 12, and by providing a second channel 131, a second vent 132, and a third vent 133 on the second plate 13, and utilizing the communication between the third vent 133 and the first vent 122, thermal runaway gas is allowed to escape into the channels within the housing 1 and ultimately exit the battery pack, improving the safety of the battery pack and effectively preventing thermal runaway of a single battery cell 2 from affecting adjacent battery cells 2. Simultaneously, the horizontal arrangement of the battery cells 2 reduces the height of the battery pack along the third direction Z, which is beneficial for increasing the volumetric energy density of the battery pack. Furthermore, the second plate 13 can move along the second direction Y, thereby changing the size of the receiving cavity 11 along the second direction Y, thus enabling the housing 1 to accommodate battery cells 2 of different sizes and improving its applicability.

[0063] Specifically, the first plate 12 can extend along the second direction Y, and the second plate 13 can extend along the first direction X, and the two are connected to form at least one receiving cavity 11. The first channel 121 extends along the length direction of the first plate 12, and the second channel 131 extends along the length direction of the second plate 13. This ensures that both the first channel 121 and the second channel 131 have a large volume, and facilitates the second channel 131 to communicate with multiple second exhaust holes 132.

[0064] It should be noted that the second plate 13 of this application can move along the second direction Y, so that the size of the receiving cavity 11 along the second direction Y can be adjusted. At this time, the position of the second plate 13 can be adjusted according to the size of the battery cell 2.

[0065] It should also be noted that while the second plate 13 moves along the second direction Y, the third vent 133 is always sealed and connected with the first vent 122, which can ensure smooth venting when the battery cell 2 experiences thermal runaway.

[0066] It should also be noted that the electrode terminals 21 and pressure relief components 22 of the battery cell 2 of this application are arranged on both sides of the battery cell 2 along the second direction Y. At this time, the battery cell 2 lies horizontally in the housing 1, which can effectively reduce the size of the housing 1 along the third direction Z. At the same time, the exhaust channel is directly integrated into the first plate 12 and the second plate 13 (specifically, it can be in the horizontal and vertical beams of the housing 1), which further reduces the setting of exhaust channels and other components. On the one hand, it further reduces the size of the battery pack along the third direction Z, and on the other hand, it reduces the structural components inside the battery pack, which greatly reduces the weight of the battery pack and is conducive to the lightweighting of the battery pack and the improvement of volumetric energy density.

[0067] like Figure 4 and Figure 5 As shown, in some embodiments, the first plate 12 has a first groove 123, which is disposed on the side of the first plate 12 facing the second plate 13. A first vent 122 penetrates the bottom of the first groove 123 and communicates with the first groove 123. The second plate 13 includes a first body 134 and a first slider 135. The second vent 132 penetrates the first body 134 along the second direction Y. The first slider 135 is connected to the side of the first body 134 facing the first plate 12. The first slider 135 is inserted into the first groove 123 and can slide along the second direction Y in the first groove 123. A second channel 131 penetrates the side of the first body 134 near the first plate 12. A third vent 133 penetrates the first slider 135 and communicates with the second channel 131.

[0068] In this embodiment, by providing a first groove 123 in the first plate 12 and a second plate 13 including a first slider 135, the first slider 135 is inserted into the first groove 123, and the first groove 123 provides a sliding track for the first slider 135, enabling the second plate 13 to slide along the second direction Y. At the same time, the first slider 135 is always in contact with the bottom wall of the first groove 123, effectively sealing a part of the first exhaust channel and preventing the sealed connection between the first exhaust hole 122 and the third exhaust hole 133 from being destroyed.

[0069] Please refer to the following: Figure 5 , Figure 8 , Figure 9 , Figure 10 and Figure 13 In some embodiments, the first plate 12 has a second slide groove 124, which is disposed on the side of the first plate 12 facing the second plate 13. The second slide groove 124 is disposed on the side of the first slide groove 123 along the second direction Y and communicates with the first slide groove 123. The second plate 13 also includes a second slider 136, which is connected to the side of the first slider 135. The second slider 136 is inserted into the second slide groove 124 and can slide in the second slide groove 124 along the second direction Y.

[0070] In this embodiment of the application, by setting the second slide groove 124 to cooperate with the second slider 136, the second plate 13 and the first plate 12 can be further mutually limited, and the second slide groove 124 can be used to further guide the second slider 136.

[0071] It should be noted that, in this embodiment of the application, along the third direction Z, the size of the first slider 135 is larger than the size of the second slider 136, the size of the first slide groove 123 is larger than the size of the second slide groove 124, and the size of the first slider 135 matches the size of the first slide groove 123, and the size of the second slide groove 124 matches the size of the second slider 136, so as to ensure that the second plate 13 can slide smoothly along the second direction Y, and to avoid the second plate 13 from tilting and getting stuck.

[0072] Please continue to refer to the following: Figure 5 , Figure 8 , Figure 9 , Figure 10 and Figure 13In some embodiments, the first plate 12 has a third slide groove 125, which is disposed along the second direction Y on the side of the first slide groove 123 away from the second slide groove 124 and communicates with the first slide groove 123; the second plate 13 includes a third slider 137, which is connected to the side of the first slider 135 along the second direction Y away from the second slider 136, and is inserted into the third slide groove 125 and can move along the second direction Y within the third slide groove 125.

[0073] In this embodiment of the application, by setting the third slide groove 125 to cooperate with the second slide groove 124 and the first slide groove 123, and setting the third slider 137 to cooperate with the first slider 135 and the second slider 136, the stability of the second plate 13 sliding along the second direction Y is further improved, and the tilting and jamming of the second plate 13 can be further avoided.

[0074] In some embodiments, the battery pack further has a third direction Z intersecting the first direction X and the second direction Y. The size of the third vent 133 along the second direction Y is greater than the size of the first vent 122 along the second direction Y, and the size of the third vent 133 along the third direction Z is less than or equal to the size of the first channel 121. Along the first direction X, the orthographic projection of the first slider 135 on the first plate 12 covers the first vent 122, and the third vent 133 communicates with the first vent 122.

[0075] In this embodiment, by setting the size of the third vent 133 along the second direction Y to be larger than the size of the first vent 122 along the second direction Y, the third vent 133 and the first vent 122 can be kept connected throughout the entire stroke of the second plate 13 moving along the second direction Y. This ensures that when the battery cell 2 experiences thermal runaway, it can enter the second channel 131 through the second vent 132 and the first vent 122 through the third vent 133, eventually reaching the first channel 121 and being discharged through the pressure relief hole 126.

[0076] It should be noted that, in this embodiment, in order to keep the first exhaust port 122 always connected to the third exhaust port 133, the second plate 13 needs to be configured such that the first exhaust port 122 and the third exhaust port 133 can be connected within the maximum range of movement on both sides of the first exhaust port 122. Specifically, the second plate 13 can be configured such that the maximum movement distance of the second plate 13 along the second direction Y on both sides of the first exhaust port 122 is less than half the size of the first exhaust port 122. This ensures that the second plate 13 can move to adjust the size of the receiving cavity 11 along the second direction Y, and also ensures that the third exhaust port 133 and the first exhaust port 122 have a large communication diameter, ensuring that gas can quickly reach the first channel 121 from the second channel 131.

[0077] In some embodiments, along the second direction Y, the size of the first slider 135 is smaller than the size of the first slide groove 123, the sum of the size of the first slider 135 and the size of the second slider 136 is greater than the size of the first slide groove 123, and the sum of the size of the first slider 135 and the size of the third slider 137 is greater than the size of the first slide groove 123; along the third direction Z, the size of the first slide groove 123 is greater than the size of the second slide groove 124, and the size of the first slide groove 123 is greater than the size of the third slide groove 125.

[0078] In this embodiment of the application, the above-mentioned dimensional relationship setting can ensure that the second slider 136 is always located in the second slide groove 124 and the third slider 137 is always located in the third slide groove 125, so as to ensure the stable connection between the second plate 13 and the first plate 12 and avoid the second plate 13 from tilting along its axial direction.

[0079] Please refer to the following: Figure 2 , Figure 6 , Figure 7 , Figure 14 In some embodiments, the housing 1 further includes a third plate 14, which is disposed on the side of the second plate 13 away from the first plate 12 along the first direction X. A fourth slide groove 141 is provided on the side of the third plate 14 close to the second plate 13, and the fourth slide groove 141 extends along the second direction Y. The second plate 13 further includes a fourth slider 138, which is inserted into the fourth slide groove 141 and can slide along the second direction Y within the fourth slide groove 141.

[0080] Please refer to the following: Figure 2 , Figure 3 , Figure 7 , Figure 15 In some embodiments, the housing 1 further includes a fourth plate 15, which is disposed opposite to the second plate 13 along the second direction Y; a fifth slide groove 151 is provided on the side of the fourth plate 15 facing the second plate 13; the first plate 12, the second plate 13, the third plate 14 and the fourth plate 15 form a receiving cavity 11; the third plate 14 includes a second body 142 and a fifth slider 143, the fourth slide groove 141 is disposed on the side of the second body 142 facing the second plate 13, the fifth slider 143 is disposed on the side of the second body 142 near the fourth plate 15, the fifth slider 143 is inserted into the fifth slide groove 151, and the fifth slider 143 can move in the fifth slide groove 151 along the first direction X.

[0081] In this embodiment of the application, by providing a fifth slide groove 151 in the fourth plate 15 and a fifth slider 143 in the third plate 14, the fifth slider 143 can slide in the fifth slide groove 151, thereby enabling the third plate 14 to slide relative to the fourth plate 15 along the first direction X. At this time, the size of the receiving cavity 11 along the first direction X can be adjusted.

[0082] It should be noted that the dimensions of the second plate 13 along the first direction X need to be adapted to the position of the third plate 14 to ensure that the second plate 13 can be connected to the third plate 14 and the first plate 12 respectively, and form a receiving cavity 11.

[0083] In this embodiment, by setting the third plate 14, the size of the receiving cavity 11 can be adjusted along the first direction X by moving along the first direction X, thus making it suitable for different numbers and sizes of battery cells 2.

[0084] Please refer to the following: Figure 2 , Figure 3 , Figure 7 , Figure 16 In some embodiments, the housing 1 further includes a fifth plate 16 and a plurality of second plates 13. The fifth plate 16 is disposed on the side of the second plate 13 away from the fourth plate 15. The fifth plate 16, the first plate 12, the second plate 13, and the third plate 14 form a receiving cavity 11. The fifth plate 16 has a sixth sliding groove 161 on the side facing the second plate 13. The third plate 14 further includes a sixth slider 144, which is connected to the side of the second body 142 away from the fifth slider 143. The sixth slider 144 is inserted into the sixth sliding groove 161 and can move along the first direction X within the sixth sliding groove 161. A plurality of second plates 13 are spaced apart between the fifth plate 16 and the fourth plate 15 along the second direction Y. The two plates 13 are provided with multiple second vent holes 132 on both sides along the second direction Y; the first plate 12 has multiple first vent holes 122, which are spaced apart along the second direction Y; the multiple second plates 13 are connected to the first plate 12, and the third vent hole 133 of each second plate 13 is sealed and connected to a first vent hole 122; multiple battery cells 2 arranged along the first direction X form a battery pack 20, and the battery pack includes multiple battery packs 20 arranged along the second direction Y. Two adjacent battery packs 20 are arranged on both sides of a second plate 13 along the second direction Y; the pressure relief component 22 of each battery cell 2 of the two battery packs 20 is arranged facing the second plate 13, and the pressure relief component 22 is arranged opposite to a second vent hole 132.

[0085] In this embodiment of the application, by setting the fifth plate 16 to cooperate with the fourth plate 15, the two ends of the third plate 14 can slide in the grooves of the fourth plate 15 and the fifth plate 16 respectively, thereby realizing that the size of the multiple receiving cavities 11 is adjustable along the first direction X.

[0086] It should be noted that this application provides multiple second plates 13 spaced apart along the second direction Y, and the second plates 13 together form a receiving cavity 11, thus forming multiple receiving cavities 11.

[0087] It should also be noted that the second plate 13 has second vent holes 132 on both sides along the second direction Y. Two battery packs 20 are arranged between two adjacent second plates 13, and there is no second plate 13 between the two battery packs 20. The electrode terminals 21 of the battery cells 2 of the two battery packs 20 are arranged facing each other. This is beneficial for using an electrical isolation plate to directly act on the two battery packs 20, further saving the use of other structural components and contributing to the overall lightweighting of the battery pack. At the same time, the pressure relief component 22 of the battery cell 2 of each battery pack 20 is arranged facing the second plate 13 and connected to the second plate 13. The pressure relief component 22 is at least partially arranged opposite to the second vent hole 132, so that when the battery cell 2 thermally runs away, the pressure relief component 22 opens to the second vent hole 132 to release pressure. The thermal runaway gas enters the second channel 131 through the second vent hole 132 and finally reaches the first channel 121 for subsequent discharge.

[0088] Please refer to the following: Figure 2 , Figure 3 and Figure 11 In some embodiments, the first plate 12 also has a pressure relief hole 126, which is located on the side of the first plate 12 away from the second plate 13 and is connected to the first channel 121; the housing 1 also includes an explosion-proof valve 17, which is connected to the first plate 12 and covers the pressure relief hole 126.

[0089] In this embodiment of the application, by providing a pressure relief hole 126 communicating with the first channel 121 on the first plate 12, and correspondingly providing an explosion-proof valve 17 in the pressure relief hole 126, the explosion-proof valve 17 can open to relieve pressure when the gas is discharged from the battery cell 2 in thermal runaway and the gas enters the first channel 121 and exceeds the opening threshold of the explosion-proof valve 17, so as to ensure the safety of other battery cells 2 inside the battery pack.

[0090] Accordingly, an electrical device according to an embodiment of this application includes a battery pack as described in any of the foregoing embodiments.

[0091] In the embodiments of this application, the power-consuming device includes the aforementioned battery pack, wherein the aforementioned battery pack is used to supply power to the power-consuming device. Therefore, the power-consuming device includes all the technical features and technical effects of the aforementioned battery pack.

[0092] Of course, the electrical devices referred to in this application can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be new energy vehicles, including pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles; spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This application does not impose any special limitations on the above-mentioned electrical devices.

[0093] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0094] The battery pack and power device provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, Having intersecting first and second directions, including: A housing having at least one receiving cavity, the housing comprising: The first plate has a first channel and a first vent hole. The first vent hole passes through the first plate near the receiving cavity and communicates with the first channel. A second plate is disposed on the side of the first plate where the first vent hole is located. The second plate is connected to the first plate to form the receiving cavity. The second plate has a second channel, a third vent hole, and a plurality of second vent holes spaced apart along the first direction. The second channel extends along the first direction. The second vent holes penetrate the second plate along one side of the second plate along the second direction and communicate with the second channel. The third vent holes penetrate the second plate near the first plate and communicate with the second channel. The second plate is movable along the second direction, and the third vent hole is in sealed communication with the first vent hole. A plurality of battery cells arranged along the first direction are disposed in the receiving cavity; the battery cells are respectively provided with electrode terminals and pressure relief components on both sides along the second direction, the side of the battery cell with the pressure relief component is connected to the side of the second plate with the second vent hole, and at least a portion of the orthographic projection of each pressure relief component on the second plate is located in one of the second vent holes.

2. The battery pack according to claim 1, characterized in that, The first plate has a first groove, which is located on the side of the first plate facing the second plate. The first vent hole penetrates the bottom of the first groove and communicates with the first groove. The second plate includes: The first body has a second vent that penetrates one side of the first body along the second direction; The first slider is connected to the side of the first body facing the first plate. The first slider is inserted into the first groove and can slide in the first groove along the second direction. The second channel passes through the side of the first body near the first plate. The third vent passes through the first slider and communicates with the second channel.

3. The battery pack according to claim 2, characterized in that, The first plate has a second slide groove, which is disposed on the side of the first plate facing the second plate. The second slide groove is disposed on one side of the first slide groove along the second direction and communicates with the first slide groove. The second plate also includes a second slider, which is connected to one side of the first slider. The second slider is inserted into the second groove and can slide in the second groove along the second direction.

4. The battery pack according to claim 3, characterized in that, The first plate has a third slide groove, which is disposed along the second direction on the side of the first slide groove away from the second slide groove and communicates with the first slide groove; The second plate includes a third slider, which is connected to the side of the first slider away from the second slider along the second direction. The third slider is inserted into the third groove and can move in the third groove along the second direction.

5. The battery pack according to claim 4, characterized in that, The battery pack also has a third direction intersecting the first direction and the second direction. The size of the third vent along the second direction is greater than the size of the first vent along the second direction. The size of the third vent along the third direction is less than or equal to the size of the first channel. Along the first direction, the orthographic projection of the first slider on the first plate covers the first vent. The third vent is connected to the first vent.

6. The battery pack according to claim 5, characterized in that, Along the second direction, the size of the first slider is smaller than the size of the first groove, the sum of the size of the first slider and the size of the second slider is greater than the size of the first groove, and the sum of the size of the first slider and the size of the third slider is greater than the size of the first groove; along the third direction, the size of the first groove is greater than the size of the second groove, and the size of the first groove is greater than the size of the third groove.

7. The battery pack according to claim 1, characterized in that, The housing further includes a third plate, which is disposed on the side of the second plate away from the first plate along the first direction. A fourth sliding groove is provided on the side of the third plate close to the second plate, and the fourth sliding groove extends along the second direction. The second plate also includes a fourth slider, which is inserted into the fourth sliding groove and is capable of sliding in the fourth sliding groove along the second direction.

8. The battery pack according to claim 7, characterized in that, The housing further includes a fourth plate, which is disposed opposite to the second plate along the second direction; a fifth groove is provided on the side of the fourth plate facing the second plate; the first plate, the second plate, the third plate, and the fourth plate form a receiving cavity; The third plate includes a second body and a fifth slider. The fourth slide groove is disposed on the side of the second body facing the second plate, and the fifth slider is disposed on the side of the second body close to the fourth plate. The fifth slider is inserted into the fifth slide groove and can move in the fifth slide groove along the first direction.

9. The battery pack according to claim 8, characterized in that, The enclosure also includes: The fifth plate is disposed on the side of the second plate away from the fourth plate. The fifth plate, the first plate, the second plate, and the third plate form a receiving cavity. The fifth plate has a sixth sliding groove on the side facing the second plate. The third plate also includes a sixth slider. The sixth slider is connected to the side of the second body away from the fifth slider. The sixth slider is inserted into the sixth sliding groove and can move in the sixth sliding groove along the first direction. Multiple second plates are spaced apart between the fifth plate and the fourth plate along the second direction, and multiple second exhaust holes are provided on both sides of the second plates along the second direction; The first plate has a plurality of first exhaust holes, the plurality of first exhaust holes are spaced apart along the second direction, the plurality of second plates are all connected to the first plate, and the third exhaust hole of each second plate is sealed and connected to one of the first exhaust holes; A battery pack is formed by multiple battery cells arranged along the first direction. The battery pack includes multiple battery cells arranged along the second direction. Two adjacent battery cells are disposed on both sides of a second plate along the second direction. The pressure relief device of each battery cell in the two battery cells is disposed facing the second plate, and the pressure relief device is disposed opposite to a second vent hole.

10. The battery pack according to claim 1, characterized in that, The first plate also has a pressure relief hole, which is located on the side of the first plate away from the second plate and is connected to the first channel; The enclosure also includes an explosion-proof valve, which is connected to the first plate and covers the pressure relief hole.

11. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-10.

Images