Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries. The heat exchange assembly is connected with the box body, and a containing cavity is defined by the heat exchange assembly and the box body; the first pressure relief piece is arranged in the containing cavity, the first pressure relief piece is connected with the heat exchange assembly, a first exhaust channel is defined by the first pressure relief piece and the heat exchange assembly, and the first pressure relief piece is provided with a plurality of first pressure relief parts; the batteries are arranged in the containing cavity, each battery comprises a body and a second pressure relief part arranged on the body, the bodies are connected with the heat exchange assembly, the second pressure relief parts are located on the sides, facing the first pressure relief parts, of the bodies, the second pressure relief parts and the first pressure relief parts are correspondingly arranged, and the second pressure relief parts are configured to be broken when the internal pressure of the bodies exceeds a first threshold value. The first pressure relief part is configured to communicate with the first exhaust channel after the second pressure relief part is broken. Gas generated by thermal runaway of the battery can be guided to be discharged out of the battery pack, the exhaust efficiency is improved, and the safety of the battery pack is improved.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery pack and an electrical device using the same. Background Art

[0002] When thermal runaway occurs in the battery inside the battery pack, a large amount of high-temperature and high-pressure gas will be generated inside the battery. When the internal pressure of the battery reaches the threshold, it will break through the pressure relief structure of the battery. At this time, the high-temperature and high-pressure gas will quickly spray into the battery pack. If the high-temperature and high-pressure gas is not guided out of the battery pack in time, it is not only easy to cause more battery damage, but also may trigger more serious safety accidents. Summary of the Utility Model

[0003] Purpose of the Utility Model: The embodiments of this application provide a battery pack, aiming to solve the above technical problems; another purpose of this application is to provide an electrical device using the above battery pack.

[0004] Technical Solution: A battery pack according to an embodiment of this application includes:

[0005] A box body;

[0006] A heat exchange component, the heat exchange component is connected to the box body, and an accommodation cavity is formed between the heat exchange component and the box body;

[0007] A first pressure relief member, the first pressure relief member is disposed in the accommodation cavity, the first pressure relief member is connected to the heat exchange component, and a first exhaust passage is formed between the first pressure relief member and the heat exchange component. The first pressure relief member is provided with a plurality of first pressure relief portions;

[0008] A plurality of batteries, the plurality of batteries are disposed in the accommodation cavity. The battery includes a body and a second pressure relief portion disposed on the body. The body is connected to the heat exchange component. The second pressure relief portion is located on a side of the body facing the first pressure relief portion, and the second pressure relief portion and the first pressure relief portion are correspondingly arranged. The second pressure relief portion is configured to break when the internal pressure of the body exceeds a first threshold, and the first pressure relief portion is configured to be able to communicate with the first exhaust passage after the second pressure relief portion breaks.

[0009] In some embodiments, a second exhaust passage is provided in the box body, and the second exhaust passage communicates with the first exhaust passage.

[0010] In some embodiments, a plurality of the first pressure relief members are provided. The plurality of first pressure relief members are respectively connected to the heat exchange component and form a plurality of the first exhaust passages, and the plurality of first exhaust passages communicate with each other.

[0011] In some embodiments, the box body includes:

[0012] A frame that surrounds the heat exchange component, and the frame and the heat exchange component enclose the accommodation cavity, and the second exhaust passage is formed within the frame;

[0013] A cross beam disposed within the accommodation cavity, the cross beam connecting the heat exchange component and the frame, and a third exhaust passage is provided within the cross beam, and the third exhaust passage communicates with the first exhaust passage and the second exhaust passage.

[0014] In some embodiments, a plurality of the bodies are arranged in a first direction, a plurality of the bodies are respectively connected to the first pressure relief member, a plurality of the first pressure relief portions are arranged in the first direction, and the first pressure relief portion and the second pressure relief portion are correspondingly arranged;

[0015] The battery pack further includes:

[0016] A plurality of thermal conductive adhesive layers disposed between the body and the heat exchange component, and the thermal conductive adhesive layers are respectively connected to the body and the heat exchange component, a plurality of the thermal conductive adhesive layers are spaced apart in a second direction, and the first pressure relief member is located between two adjacent thermal conductive adhesive layers, and the first direction intersects with the second direction.

[0017] In some embodiments, a plurality of the bodies are arranged in a first direction, and in the first direction, there is a first gap between adjacent bodies, a plurality of the bodies are respectively connected to the first pressure relief member, and a plurality of the first pressure relief portions are arranged in the first direction;

[0018] The battery pack further includes:

[0019] A plurality of seals arranged in the first direction, and in the first direction, each seal is spaced between two adjacent first pressure relief portions, and each seal is sealingly connected to two adjacent bodies and the first pressure relief member to block the first gap.

[0020] In some embodiments, the heat exchange component includes a first heat exchange member and a second heat exchange member connected to each other, and a heat exchange flow channel is formed between the first heat exchange member and the second heat exchange member;

[0021] The first pressure relief member is disposed on a side of the first heat exchange member facing away from the second heat exchange member, the first pressure relief member and the first heat exchange member enclose the first exhaust passage, and there is a second gap between the first pressure relief portion and the corresponding second pressure relief portion.

[0022] In some embodiments, a first groove is formed on a side of the first heat exchange member facing the body, the first pressure relief member is embedded in the first groove, and the first pressure relief member and the groove wall of the first groove enclose the first exhaust passage.

[0023] In some embodiments, the battery further includes a pole column provided on the body, and the pole column and the second pressure relief portion of the same battery are distributed on different sides of the body.

[0024] Correspondingly, an electrical device according to an embodiment of the present application includes the above-mentioned battery pack.

[0025] Beneficial effects: The battery pack of the embodiment of the present application includes a box body, a heat exchange component, a first pressure relief member, and a plurality of batteries. The heat exchange component is connected to the box body and encloses a containing cavity with the box body. The first pressure relief member is provided in the containing cavity and connected to the heat exchange component. The first pressure relief member and the heat exchange component enclose a first exhaust passage, and the first pressure relief member is provided with a plurality of first pressure relief portions. The plurality of batteries are provided in the containing cavity. The battery includes a body and a second pressure relief portion provided on the body. The body is connected to the heat exchange component. The second pressure relief portion is located on a side of the body facing the first pressure relief portion, and the second pressure relief portion and the first pressure relief portion are correspondingly arranged. The second pressure relief portion is configured to break when the internal pressure of the body exceeds a first threshold. The first pressure relief portion is configured to be able to communicate with the first exhaust passage after the second pressure relief portion breaks. When a thermal runaway occurs in the battery in the containing cavity, the internal pressure of the body exceeds the first threshold and breaks the second pressure relief portion, and high-temperature and high-pressure gas is ejected from the second pressure relief portion toward the first pressure relief portion. The first pressure relief portion bears the impact pressure and then communicates with the first exhaust passage, so as to guide the gas generated by the thermal runaway of the battery out of the battery pack through the first exhaust passage, improving the exhaust efficiency and the safety of the battery pack. At the same time, the first pressure relief portions corresponding to the other batteries that do not undergo thermal runaway can block the gas flow in the first exhaust passage from flowing toward the batteries that do not undergo thermal runaway, improving the protection of the batteries that do not undergo thermal runaway and reducing the risk of the thermal runaway battery inducing other batteries to undergo thermal runaway. In addition, the first pressure relief portions are spaced between the second pressure relief portion and the heat exchange component at the same time to form a buffering effect, which is beneficial to reducing the impact of the high-temperature and high-pressure gas on the heat exchange component and improving the protection of the heat exchange component. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 is a schematic structural diagram of the battery pack box body and the battery in the embodiment of the present application;

[0028] Figure 2 is an exploded structural diagram of the battery pack in the embodiment of the present application;

[0029] Figure 3It is a schematic structural diagram of the battery pack according to the embodiment of the present application from a top-down perspective;

[0030] Figure 4 It is Figure 3 a partial cross-sectional view along line A-A in

[0031] Figure 5 It is Figure 4 a partially enlarged view of part D in

[0032] Figure 6 It is Figure 3 a partial cross-sectional view along line B-B in

[0033] Figure 7 It is Figure 3 a partial cross-sectional view along line C-C in

[0034] Figure 8 It is an exploded structural diagram of the cross beam and the frame according to the embodiment of the present application;

[0035] Figure 9 It is a schematic structural diagram for showing the heat-conducting adhesive layer and the seal according to the embodiment of the present application;

[0036] Reference numerals: 1, box body; 10, frame; 100, second exhaust passage; 101, fourth exhaust port; 102, side beam; 11, accommodation cavity; 12, cross beam; 120, third exhaust passage; 121, second exhaust port; 122, third exhaust port; 2, heat exchange assembly; 20, heat exchange flow channel; 21, first exhaust passage; 22, first heat exchange member; 220, first groove; 2200, sinking groove portion; 2201, annular groove portion; 23, second heat exchange member; 230, second groove; 231, third groove; 24, liquid inlet; 25, liquid outlet; 3, first pressure relief member; 30, base portion; 31, first pressure relief portion; 32, first exhaust port; 4, battery; 40, body; 41, second pressure relief portion; 42, pole column; 43, first gap; 5, heat-conducting adhesive layer; 50, first adhesive layer; 51, second adhesive layer; 6, seal; 7, second gap; X, first direction; Y, second direction; Z, third direction. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0038] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, and at least one means one, two or more, unless otherwise specifically defined.

[0039] Referring to Figures 1 to 9 , an embodiment of the present application provides a battery pack, including a box body 1, a heat exchange component 2, a first pressure relief member 3, and a plurality of batteries 4.

[0040] Among them, the heat exchange component 2 is connected to the box body 1, and the heat exchange component 2 and the box body 1 enclose a receiving cavity 11. The first pressure relief member 3 is arranged in the receiving cavity 11, the first pressure relief member 3 is connected to the heat exchange component 2, and the first pressure relief member 3 and the heat exchange component 2 enclose a first exhaust passage 21. The first pressure relief member 3 is provided with a plurality of first pressure relief parts 31.

[0041] The plurality of batteries 4 are arranged in the receiving cavity 11. The battery 4 includes a body 40 and a second pressure relief part 41 arranged on the body 40. The body 40 is connected to the heat exchange component 2. The second pressure relief part 41 is located on the side of the body 40 facing the first pressure relief part 31. The second pressure relief part 41 and the first pressure relief part 31 are correspondingly arranged. The second pressure relief part 41 is configured to break when the internal pressure of the body 40 exceeds a first threshold value, and the first pressure relief part 31 is configured to be able to communicate with the first exhaust passage 21 after the second pressure relief part 41 breaks.

[0042] It should be noted that in this embodiment, the second pressure relief part 41 can adopt a conventional battery 4 pressure relief valve, and the first threshold value required for it to break can be flexibly adjusted according to different battery 4 specifications, which will not be elaborated here.

[0043] In this embodiment, the first pressure relief part 31 itself has structural strength, and its structural strength is set to be less than the instantaneous destructive force of the gas ejected towards the first pressure relief part 31 at the moment when the second pressure relief part 41 breaks. That is, the first pressure relief part 31 can dissipate part of the gas impact force ejected at the second pressure relief part 41, but cannot prevent the second pressure relief part 41 from smoothly exhausting gas towards the first exhaust passage 21.

[0044] When the battery 4 in the accommodation cavity 11 undergoes thermal runaway, the pressure inside the corresponding main body 40 exceeds the first threshold and then breaks through the second pressure relief part 41. At this time, high-temperature and high-pressure gas is ejected from the second pressure relief part 41 towards the first pressure relief part 31. The first pressure relief part 31 bears the impact pressure of the ejected high-temperature and high-pressure gas and then communicates with the first exhaust passage 21, so as to guide the gas generated by the thermal runaway of the battery 4 to be discharged from the battery pack through the first exhaust passage 21, improving the exhaust efficiency and the safety of the battery pack.

[0045] Meanwhile, the first pressure relief parts 31 corresponding to the other batteries 4 that have not undergone thermal runaway can block the gas flow in the first exhaust passage 21 from flowing towards the batteries 4 that have not undergone thermal runaway, improving the protection of the batteries 4 that have not undergone thermal runaway and reducing the risk of the thermal runaway battery 4 inducing other batteries 4 to undergo thermal runaway.

[0046] In addition, the first pressure relief part 31 is spaced between the second pressure relief part 41 and the heat exchange component 2 to form a buffering effect, that is, to consume the impact destructive force of the gas ejected during thermal runaway, which is beneficial to reducing the impact of the high-temperature and high-pressure gas on the heat exchange component 2 and improving the protection of the heat exchange component 2.

[0047] Exemplarily, the first pressure relief part 31 is configured to break when the pressure it bears exceeds the second threshold, and the second threshold is smaller than the first threshold. It is ensured that when the battery 4 undergoes thermal runaway and the pressure inside the main body 40 exceeds the first threshold, the second pressure relief part 41 breaks. At this time, the pressure reaching the first pressure relief part 31 will actually continuously increase with the continuation of thermal runaway. Setting the second threshold smaller than the first threshold is also to ensure that the first pressure relief part 31 can break smoothly when the main body 40 undergoes thermal runaway.

[0048] It should be noted that the following embodiments of the present application introduce a first direction X, a second direction Y, and a third direction Z that intersect pairwise. Among them, the first direction X is substantially parallel to the overall length direction of the battery pack in the embodiments of the present application, the second direction Y is substantially parallel to the overall width direction of the battery pack in the embodiments of the present application, and the third direction Z is substantially parallel to the overall height direction of the battery pack in the embodiments of the present application.

[0049] Specifically, in some embodiments, referring to Figures 2 to 5 , the heat exchange component 2 includes a first heat exchange member 22 and a second heat exchange member 23 that are connected to each other. Both the first heat exchange member 22 and the second heat exchange member 23 can adopt an integrally formed plate structure and are stacked in the third direction Z, and the first heat exchange member 22 and the second heat exchange member 23 enclose a heat exchange flow channel 20.

[0050] The first pressure relief member 3 is provided on the side of the first heat exchange member 22 facing away from the second heat exchange member 23. The first pressure relief member 3 and the first heat exchange member 22 enclose the first exhaust passage 21, and there is a second gap 7 between the first pressure relief part 31 and the corresponding second pressure relief part 41.

[0051] By reserving a second gap 7 between the first pressure relief part 31 and the corresponding second pressure relief part 41, a buffer space for gas release can be provided when the battery 4 undergoes thermal runaway, reducing the risk of the first pressure relief part 31 blocking the second pressure relief part 41, which is beneficial for the second pressure relief part 41 to smoothly release pressure and exhaust gas towards the first exhaust passage 21.

[0052] On one side of the second heat exchange part 23 relative to the first heat exchange part 22, a plurality of connected second grooves 230 are formed. After the second heat exchange part 23 is connected to the first heat exchange part 22, the second grooves 230 are covered, thereby forming the above-mentioned heat exchange flow passage 20. In order to facilitate the introduction and discharge of the heat exchange fluid into and out of the heat exchange flow passage 20, a liquid inlet 24 and a liquid outlet 25 communicating with the second grooves 230 are extendedly provided on the second heat exchange part 23, and through holes are correspondingly opened on the first heat exchange part 22 to communicate the liquid inlet 24 and the liquid outlet 25.

[0053] In some embodiments, referring to Figure 5 , on one side of the first heat exchange part 22 facing the main body 40, a first groove 220 is formed. The first pressure relief part 3 is embedded in the first groove 220, and an exhaust passage 21 is formed by the first pressure relief part 3 and the groove wall of the first groove 220.

[0054] The first groove 220 is beneficial for quickly positioning and stably installing the first pressure relief part 3, improving the assembly efficiency and stability of the first pressure relief part 3.

[0055] Specifically, referring to Figure 2 at the same time, in order to fit the first groove 220 formed by the first heat exchange part 22, the second heat exchange part 23 also needs to adaptively form a third groove 231. The parts of the first heat exchange part 22 and the second heat exchange part 23 opposite to the first pressure relief part 31 in the third direction Z are mutually attached, which is beneficial for increasing the overall structural thickness of this part and improving the anti-impact ability.

[0056] In some embodiments, referring to Figure 2 and Figure 5 , the first pressure relief part 3 further includes a base part 30, and a plurality of first pressure relief parts 31 are provided on the base part 30. It should be noted that the relationship between the base part 30 and the first pressure relief parts 31 can be a split structure. By pre-drilling holes on the base part 30, the first pressure relief parts 31 are covered on the holes of the base part 30 according to the requirement of the second threshold, and the connection structure strength is controlled. In this embodiment, taking the base part 30 and the first pressure relief parts 31 being integrally formed as an example, the structural strength at the first pressure relief parts 31 can be reduced by thinning, scoring, etc., to meet the buffering requirement without hindering the gas eruption of the first pressure relief parts 31.

[0057] Correspondingly, referring to Figure 5The first groove 220 includes a sinking groove portion 2200 and an annular groove portion 2201 surrounding the sinking groove portion 2200. The base 30 is embedded in the annular groove portion 2201 to limit the base 30 and reduce the height of the base 30 protruding from the first heat exchange element 22 away from the second heat exchange element 23 in the third direction Z to avoid affecting the arrangement of the battery 4. The first pressure relief portion 31 protrudes toward the sinking groove portion 2200 to form the above-mentioned second gap 7 with the corresponding first pressure relief portion 31.

[0058] In addition, it is understood that in some embodiments, reference Figure 5 Since the second pressure relief portion 41 is disposed on the body 40 in a structure that is recessed toward the inside of the body 40 , the second gap 7 also includes a gap between the second pressure relief portion 41 and the first pressure relief portion 31 that is generated when the second pressure relief portion 41 is recessed toward the body 40 .

[0059] In some embodiments, reference Figure 4 , Figure 6 and Figure 7 The box body 1 has a second exhaust passage 100 therein, and the second exhaust passage 100 is connected to the first exhaust passage 21 .

[0060] It is understandable that a second pressure relief member may also be provided on the housing 1 , and the gas in the first exhaust channel 21 may be further guided, cooled and pressure-relieved through the second exhaust channel 100 , and then discharged from the housing 1 through the second pressure relief member.

[0061] In some embodiments, reference Figure 2 There are multiple first pressure relief members 3, and the multiple first pressure relief members 3 are respectively connected to the heat exchange components 2 to form multiple first exhaust channels 21, and the multiple first exhaust channels 21 are interconnected.

[0062] In the present application, the plurality of batteries 4 are distributed in four columns of batteries 4 along the second direction Y, and each column of batteries 4 has a plurality of batteries 4 arranged along the first direction X. Therefore, corresponding to the four columns of batteries 4, the present application takes four first pressure relief members 3 as an example. In other embodiments, the number of columns of batteries 4 and the number of corresponding first pressure relief members 3 may also be flexibly increased, which will not be described in detail here.

[0063] By interconnecting the multiple first exhaust channels 21, when any battery 4 experiences thermal runaway, the generated gas can be quickly discharged through multiple channels, which is beneficial to reducing the pressure of the erupted gas and improving the structural protection of the battery pack.

[0064] The method of interconnecting multiple first exhaust channels 21 can be adopted, for example, in the process of forming the first groove 220 on the first heat exchanger 22, the multiple first grooves 220 corresponding to the first pressure relief member 3 are interconnected. At this time, the multiple first pressure relief members 3 are connected to each other and embedded in the multiple first grooves 220. At this time, the first exhaust channels 21 are interconnected.

[0065] In some embodiments, referring to Figure 4 and Figures 6 to 8 , the housing 1 includes a frame 10 and a cross beam 12.

[0066] The frame 10 surrounds the heat exchange component 2, and the frame 10 and the heat exchange component 2 enclose a receiving cavity 11. The second exhaust passage 100 is formed within the frame 10. In this embodiment, a frame 10 structure formed by connecting four hollow side beams 102 end to end is taken as an example. The above-mentioned second pressure relief member can be installed on any side beam 102. The cross beam 12 is disposed in the receiving cavity 11. The cross beam 12 connects the heat exchange component 2 and the frame 10. A third exhaust passage 120 is provided within the cross beam 12, and the third exhaust passage 120 communicates with the first exhaust passage 21 and the second exhaust passage 100.

[0067] That is, the multiple first exhaust passages 21 shown in this embodiment are independent of each other, and converge into the second exhaust passage 100 through the third exhaust passage 120 for centralized discharge.

[0068] In this embodiment, one cross beam 12 is provided and extends along the second direction Y to connect two side beams 102 spaced apart in the second direction Y respectively. In other embodiments, the number of cross beams 12 can also be increased as needed, which will not be elaborated here.

[0069] Specifically, referring to Figure 6 and Figure 7 , a first exhaust port 32 is formed on the first pressure relief member 3. Correspondingly, one side of the cross beam 12 facing the first pressure relief member 3 abuts against the first pressure relief member 3 and is provided with a second exhaust port 121, and the first exhaust port 32 and the second exhaust port 121 are communicated. Corresponding to the four first pressure relief members 3 in this embodiment, four second exhaust ports 121 are also provided and distributed along the second direction Y.

[0070] At the same time, referring to Figure 8 , third exhaust ports 122 are respectively formed at both ends of the cross beam 12 in the second direction Y, and the third exhaust ports 122 communicate with the third exhaust passage 120. Correspondingly, fourth exhaust ports 101 are formed on the side beam 102 facing the corresponding third exhaust ports 122, and the second exhaust passage 100 and the third exhaust passage 120 are communicated through the fourth exhaust ports 101. Therefore, when the battery 4 undergoes thermal runaway, the high-temperature and high-pressure gas enters the second exhaust passage 100 through the first exhaust passage 21 and the third exhaust passage 120 for centralized discharge.

[0071] In some embodiments, referring to Figure 2 and Figure 9 , the battery pack further includes a plurality of thermal conductive adhesive layers 5. The thermal conductive adhesive layers 5 are disposed between the body 40 and the heat exchange component 2, and the thermal conductive adhesive layers 5 are respectively connected to the body 40 and the heat exchange component 2. The plurality of thermal conductive adhesive layers 5 are spaced apart along the second direction Y, and the first pressure relief member 3 is located between two adjacent thermal conductive adhesive layers 5.

[0072] Specifically, referring to Figure 9 , the heat-conducting adhesive layer 5 includes a first adhesive layer 50 and a second adhesive layer 51. The first adhesive layer 50 only bonds a single row of cells 4. In this embodiment, there are two spaced apart in the second direction Y. The second adhesive layer 51 bonds two rows of cells 4 respectively. In this embodiment, the second adhesive layer 51 is distributed between the two first adhesive layers 50.

[0073] The heat-conducting adhesive layer 5 can bond the body 40 to the heat exchange component 2 to fix the body 40 and improve the structural strength of the overall battery pack. At the same time, the heat-conducting adhesive layer 5 can conduct heat between the body 40 and the heat exchange component 2, improving the heat exchange effect of the heat exchange component 2 on the body 40.

[0074] In addition, the heat-conducting adhesive layer 5 is distributed on both sides of the first pressure relief member 3. The heat-conducting adhesive layer 5 is hermetically connected to the heat exchange component 2 and the body 40, which is beneficial to improving the sealing effect between the body 40 and the heat exchange component 2 and preventing high-temperature and high-pressure gas from leaking from the joint surface between the body 40 and the first pressure relief member 3.

[0075] In some embodiments, referring to Figure 2 , Figure 6 and Figure 9 , in the first direction X, there is a first gap 43 between adjacent bodies 40. A plurality of bodies 40 are respectively connected to the first pressure relief member 3, and a plurality of first pressure relief portions 31 are arranged along the first direction X. The first gap 43 is beneficial to providing space for the normal expansion of the body 40 during the charging and discharging of the battery 4.

[0076] The battery pack further includes a plurality of seals 6. The plurality of seals 6 are arranged along the first direction X. In the first direction X, each seal 6 is arranged at intervals between adjacent two first pressure relief portions 31, and each seal 6 is hermetically connected to adjacent two bodies 40 and the first pressure relief member 3, thereby blocking the first gap 43.

[0077] Specifically, in this embodiment, a single seal 6 is simultaneously connected to two rows of cells 4. In other embodiments, it can also be only connected to a single row of cells 4. The seal 6 is beneficial to sealing the first gap 43 relative to the first pressure relief member 3 and the body 40, preventing the high-temperature and high-pressure gas ejected from the body 40 from spraying out from the first gap 43. The seal 6 cooperates with the heat-conducting adhesive layer 5 to form a sealing effect in the first direction X and the second direction Y respectively, thereby realizing restricting the gas ejected from the body 40 and guiding it into the first exhaust passage 21, reducing the risk of high-temperature and high-pressure gas leaking into other areas inside the battery pack.

[0078] In addition, in some embodiments, referring to Figure 4 and Figure 5, the battery 4 further includes a pole 42 provided on the body 40, and the pole 42 and the second pressure relief portion 41 of the same battery 4 are distributed on different sides of the body 40. In this embodiment, the pole 42 and the second pressure relief portion 41 are correspondingly distributed at opposite ends of the body 40 in the third direction Z. In other embodiments, the pole 42 may also be provided on the side surface of the body 40 in the second direction Y or the first direction X, as long as it is distributed on a different side from the second pressure relief portion 41.

[0079] The distribution of the pole 42 and the second pressure relief portion 41 on different sides of the body 40 is beneficial to realizing the thermoelectric separation of the battery pack. When the battery 4 undergoes thermal runaway, it reduces the high-temperature and high-pressure gas ejected from the second pressure relief portion 41 from damaging the electrical connection structure at the pole 42 and improves the protection of the electrical connection structure.

[0080] Correspondingly, an embodiment of the present application provides an electrical device, which includes the above-mentioned battery pack. The electrical device may be an electronic device, a power storage device, or a power vehicle, etc. It can be understood that the electrical device may have all the technical features and corresponding beneficial effects of the above-mentioned battery pack, which will not be elaborated here.

[0081] The above has introduced in detail a battery pack and an electrical device provided by an embodiment of the present application, and specific examples have been used to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: Box body (1); A heat exchange component (2), the heat exchange component (2) being connected to the housing (1), and the heat exchange component (2) and the housing (1) enclose a receiving cavity (11); a first pressure relief member (3), the first pressure relief member (3) being arranged in the accommodating chamber (11), the first pressure relief member (3) being connected to the heat exchange component (2), and the first pressure relief member (3) and the heat exchange component (2) forming a first exhaust passage (21), and the first pressure relief member (3) being provided with a plurality of first pressure relief portions (31); A plurality of batteries (4), wherein the plurality of batteries (4) are arranged in the accommodating cavity (11), wherein the battery (4) comprises a body (40) and a second pressure relief portion (41) arranged on the body (40), wherein the body (40) is connected to the heat exchange component (2), wherein the second pressure relief portion (41) is located on a side of the body (40) facing the first pressure relief portion (31), and the second pressure relief portion (41) and the first pressure relief portion (31) are arranged correspondingly, wherein the second pressure relief portion (41) is configured to break when the internal pressure of the body (40) exceeds a first threshold value, and wherein the first pressure relief portion (31) is configured to be able to connect to the first exhaust channel (21) after the second pressure relief portion (41) breaks.

2. The battery pack according to claim 1, characterized in that: The housing (1) has a second exhaust passage (100) therein, and the second exhaust passage (100) is connected to the first exhaust passage (21).

3. The battery pack according to claim 2, characterized in that: A plurality of the first pressure relief components (3) are provided, and the plurality of the first pressure relief components (3) are respectively connected to the heat exchange components (2) to form a plurality of the first exhaust channels (21), and the plurality of the first exhaust channels (21) are interconnected.

4. The battery pack according to claim 2, characterized in that: The housing (1) comprises: a frame (10), the frame (10) surrounding the heat exchange component (2), the frame (10) and the heat exchange component (2) enclosing the accommodating cavity (11), the second exhaust channel (100) being formed in the frame (10); A crossbeam (12), the crossbeam (12) being arranged in the accommodating cavity (11), the crossbeam (12) connecting the heat exchange component (2) and the frame (10), the crossbeam (12) having a third exhaust channel (120) therein, the third exhaust channel (120) being connected to the first exhaust channel (21) and the second exhaust channel (100).

5. The battery pack according to claim 1, characterized in that: The plurality of bodies (40) are arranged along a first direction (X), the plurality of bodies (40) are respectively connected to the first pressure relief components (3), and the plurality of first pressure relief portions (31) are arranged along the first direction (X); The battery pack further comprises: A plurality of heat-conducting adhesive layers (5), wherein the heat-conducting adhesive layers (5) are arranged between the body (40) and the heat exchange component (2), and the heat-conducting adhesive layers (5) are respectively connected to the body (40) and the heat exchange component (2), the plurality of heat-conducting adhesive layers (5) are arranged at intervals along a second direction (Y), and the first pressure relief member (3) is located between two adjacent heat-conducting adhesive layers (5), and the first direction (X) and the second direction (Y) intersect.

6. The battery pack according to claim 1, characterized in that: The plurality of bodies (40) are arranged along a first direction (X), and in the first direction (X), a first gap (43) is provided between adjacent bodies (40), the plurality of bodies (40) are respectively connected to the first pressure relief member (3), and the plurality of first pressure relief portions (31) are arranged along the first direction (X); The battery pack further comprises: A plurality of sealing members (6), wherein the plurality of sealing members (6) are arranged along the first direction (X); in the first direction (X), each of the sealing members (6) is arranged at intervals between two adjacent first pressure relief portions (31), and each of the sealing members (6) seals and connects two adjacent bodies (40) and the first pressure relief member (3) to seal the first gap (43).

7. The battery pack according to claim 1, characterized in that: The heat exchange component (2) comprises a first heat exchange element (22) and a second heat exchange element (23) which are connected to each other, and the first heat exchange element (22) and the second heat exchange element (23) surround a heat exchange flow channel (20); The first pressure relief component (3) is arranged on a side of the first heat exchange component (22) facing away from the second heat exchange component (23); the first pressure relief component (3) and the first heat exchange component (22) enclose the first exhaust channel (21); and a second gap (7) is provided between the first pressure relief portion (31) and the corresponding second pressure relief portion (41).

8. The battery pack according to claim 7, characterized in that: A first groove (220) is formed on a side of the first heat exchange component (22) facing the main body (40), the first pressure relief component (3) is embedded in the first groove (220), and the first pressure relief component (3) and the groove wall of the first groove (220) form the first exhaust channel (21).

9. The battery pack according to claim 1, characterized in that: The battery (4) further comprises a pole (42) arranged on the body (40), and the pole (42) and the second pressure relief portion (41) of the same battery (4) are distributed on different sides of the body (40).

10. An electrical device, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 9.

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