Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, the battery pack comprises a box body, a plurality of battery cell monomers and a first spacer; the box body comprises a cover body, a liquid cooling plate, a frame and a bottom protection plate, and the cover body, the frame and the bottom protection plate jointly define a containing cavity; the liquid cooling plate divides the accommodating cavity into a mounting space and an exhaust channel; a plurality of exhaust holes are formed in the liquid cooling plate; the plurality of battery cell single bodies are arranged in the mounting space; the bottom walls of the battery cell monomers are adhered to the liquid cooling plate, and anti-explosion valves are arranged on the bottom walls; the plurality of anti-explosion valves and the plurality of exhaust holes are arranged in a one-to-one correspondence manner; the first spacer is arranged between the liquid cooling plate and the bottom wall, the first spacer comprises isolation parts and second connecting parts, the isolation parts and the exhaust holes are arranged in a one-to-one correspondence mode in the third direction, and the second connecting parts are connected with the two adjacent isolation parts. According to the battery pack provided by the utility model, the invasion of eruption substances to other normal battery cell monomers is avoided, and the safety of the battery pack is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack and an electrical device. Background Technology

[0002] Existing battery packs typically have independent venting channels for discharging ejected material in the event of thermal runaway from individual battery cells. For space efficiency, multiple battery cells are usually grouped together, with the venting channels attached to the groups of cells, allowing multiple cells to eject material towards these channels. Because the ejected material from a single cell during thermal runaway is molten material with high temperature and pressure, it splashes and spreads after entering the venting channel, easily contacting other healthy battery cells and causing secondary damage. This results in other healthy battery cells, especially adjacent ones, being thermally affected. Utility Model Content

[0003] In view of this, the present invention provides a battery pack and electrical equipment to solve the problem that thermal runaway molten material can easily come into contact with other normal battery cells, causing secondary damage.

[0004] In a first aspect, the present invention provides a battery pack having a first direction, a second direction and a third direction intersecting each other, including: a housing, multiple individual battery cells and a first separator;

[0005] The enclosure includes a cover, a liquid cooling plate, a frame, and a bottom protective plate. The frame has two opposing openings along a third direction. The cover and the bottom protective plate each cover one of the openings and are positioned opposite each other. The cover, frame, and bottom protective plate together enclose a receiving cavity. The liquid cooling plate is disposed in the receiving cavity and divides the receiving cavity into an installation space and an exhaust channel. The installation space is located between the cover and the liquid cooling plate, and the exhaust channel is located between the liquid cooling plate and the bottom protective plate.

[0006] The liquid cooling plate has multiple exhaust holes that penetrate along a third direction, and the multiple exhaust holes are arranged at intervals along the first direction;

[0007] Multiple battery cells are arranged along a first direction and built into the installation space; each battery cell has a bottom wall facing the liquid cooling plate along a third direction, the bottom wall is connected to the liquid cooling plate, and an explosion-proof valve is provided on the bottom wall; multiple explosion-proof valves and multiple vent holes are arranged one-to-one along a third direction.

[0008] The first partition is disposed between the liquid cooling plate and the bottom wall. The first partition includes an isolation part and a second connecting part. Multiple isolation parts and multiple second connecting parts are arranged alternately along a first direction. Multiple isolation parts and multiple exhaust holes are arranged opposite to each other along a third direction. The second connecting part connects two adjacent isolation parts.

[0009] In the second direction, the size L2 of the second connecting part is smaller than the size L1 of the isolation part; and in the third direction, the projection of the second connecting part is at least partially located on the bottom wall.

[0010] Beneficial effects: The battery pack provided by this utility model has an installation space formed between the cover and the liquid cooling plate, in which multiple battery cells are built-in. The liquid cooling plate and the bottom protective plate are spaced apart along the third direction Z to form an exhaust channel. The exhaust holes on the liquid cooling plate and the explosion-proof valve are positioned opposite each other along the third direction Z. When the explosion-proof valve is opened, the ejected material can enter the exhaust channel through the exhaust holes, which not only avoids the ejected material from affecting the battery cells and improves the safety of the battery pack, but also leaves more installation space for the battery cells. By setting a first spacer between the liquid cooling plate and the battery cells, each first spacer has multiple... The isolation section and the explosion-proof valve are arranged opposite each other along the third direction Z. Each isolation section is covered with a corresponding vent. When a cell experiences thermal runaway, the ejected material is ejected from the explosion-proof valve of that cell under high pressure and breaks through the corresponding isolation section. After passing through the corresponding vent, the ejected material enters the exhaust channel. After the ejected material splashes and spreads in the exhaust channel, its temperature and pressure will decrease. At the same time, since the explosion-proof valves of other normal cells are also equipped with corresponding isolation sections for protection, the ejected material is prevented from interfering with other normal cells, thus improving the safety of the battery pack.

[0011] Furthermore, multiple isolation sections are connected by a second connecting part, so that a single first partition can correspond to a row of exhaust holes. During assembly, only one isolation section needs to be aligned, eliminating the need for multiple alignments. Along the second direction, the size L2 of the second connecting part is smaller than the size L1 of the isolation section, and along the third direction, the projections of the second connecting part and the bottom wall on the liquid cooling plate at least partially overlap, thereby increasing the bonding area between the bottom wall and the liquid cooling plate, improving the bonding strength between the battery cell and the liquid cooling plate, and pressing the second connecting part with the bottom wall to prevent misalignment between the explosion-proof valve and the exhaust hole.

[0012] In one optional embodiment, the isolation part includes a first connecting part, an opening part, and a plurality of ribs; the first connecting part is disposed around the outer periphery of the opening part, and the first connecting part and the opening part are spaced apart, and the ribs are connected between the first connecting part and the opening part; the opening part and the explosion-proof valve are disposed opposite each other along a third direction, one side of the first connecting part along the third direction abuts against the liquid cooling plate, and two adjacent first connecting parts along the first direction are connected by a second connecting part.

[0013] Beneficial effects: By connecting the opening part to the first connecting part through several ribs, when a certain cell experiences thermal runaway, the ejected material is ejected from the explosion-proof valve of the cell under high pressure and impacts the opening part of the corresponding isolation part, forcing the ribs to break. This causes the opening part to fold open from the first connecting part, allowing the ejected material to pass through the corresponding vent hole and enter the venting channel. The ribs of the isolation parts corresponding to other normal cell cells remain connected, preventing the ejected material from interfering with other normal cell cells and improving the safety of the battery pack.

[0014] In one optional embodiment, the isolation portion is provided with a first notch, the isolation portion has an axis parallel to a third direction, the first notch extends in the direction around the axis and divides the isolation portion into a first connecting portion and an opening portion, the first connecting portion is disposed around the peripheral outer edge of the opening portion; the opening portion and the explosion-proof valve are disposed opposite to each other in a third direction.

[0015] Beneficial effects: The first notch divides the isolation section into a first connecting part and an opening part. When a certain cell experiences thermal runaway, the ejected material is ejected from the explosion-proof valve of that cell under high pressure and impacts the opening part of the corresponding isolation section. This causes the opening part to break off from the first connecting part along the first notch, allowing the ejected material to pass through the corresponding vent hole and enter the venting channel. The isolation sections of other normal cell cells remain connected, preventing the ejected material from interfering with other normal cell cells and improving the safety of the battery pack.

[0016] In one alternative embodiment, the battery pack includes a plurality of first separators spaced apart along a second direction.

[0017] Beneficial effects: Each battery cell has an isolation part between its explosion-proof valve and corresponding vent, which prevents the ejected material from interfering with other normal battery cells and improves the safety of the battery pack.

[0018] In one alternative embodiment, a clearance zone is formed between two adjacent first connecting portions and second connecting portions, and the clearance zone is used to fill the adhesive layer.

[0019] Beneficial effect: By creating a clearance zone between two adjacent first and second connection parts, the bonding area between the battery cell and the liquid cooling plate is maximized to ensure the bonding strength between the battery cell and the liquid cooling plate.

[0020] In one alternative implementation, the opening is formed with one or more second grooves.

[0021] Beneficial effects: By creating a second notch on the opening section, the exhaust area after the isolation section is opened is increased, and the consistency of the opening path of the isolation section is improved.

[0022] In one alternative embodiment, the battery pack further includes a second spacer attached to the side of the bottom protective plate facing the liquid cooling plate in a third direction;

[0023] The second partition and the vent are positioned opposite each other along a third direction.

[0024] Beneficial effects: By installing a second partition in the exhaust channel and positioning it opposite the exhaust port in the third direction Z, when a single battery cell experiences thermal runaway, the ejected material is ejected from the explosion-proof valve of that cell under high pressure and enters the exhaust channel through the corresponding exhaust port. Due to the obstruction of the second partition, the heat of the ejected material is effectively prevented from being transferred to the bottom protection plate and other components, effectively reducing the risk of fire. At the same time, the insulation effect of the second partition effectively prevents short circuits caused by thermal runaway, ensuring the electrical safety of the battery pack.

[0025] In one alternative embodiment, the battery pack further includes a spring clip support, which is supported between the liquid cooling plate and the bottom protective plate, and the spring clip support is disposed on at least one side of the second spacer along the second direction.

[0026] Beneficial effect: By installing a spring clip bracket between the liquid cooling plate and the bottom protective plate, the collapse between the liquid cooling plate and the bottom protective plate is prevented, thereby ensuring the unobstructed flow of the exhaust channel.

[0027] In one alternative embodiment, the liquid cooling plate has multiple cooling channels disposed between two adjacent exhaust holes, and the cooling channels are suitable for the flow of cooling medium.

[0028] Beneficial effects: By setting up a cooling channel between two adjacent exhaust channels, and with the cooling channel and exhaust channel being set up independently, it is possible to cool both the individual battery cells and the ejected material diffused in the exhaust channel, thereby improving the safety of the battery pack.

[0029] Secondly, this utility model also provides an electrical device, including: a device body, and a battery pack as described above.

[0030] Beneficial effects: By adopting the battery pack of the first aspect, the electrical equipment of the second aspect allows for the ejection of material under high pressure from the explosion-proof valve of the cell when a single cell experiences thermal runaway. This material then breaks through the corresponding isolation section and enters the exhaust channel after passing through the corresponding vent. As the material splashes and spreads within the exhaust channel, its temperature and pressure decrease. Simultaneously, since the explosion-proof valves of other normal cells are equipped with corresponding isolation sections for protection, the ejected material is prevented from interfering with other normal cells, thus improving the safety of the battery pack and the entire electrical equipment. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a top view of a single row of battery cells behind a hidden cover of a battery pack according to an embodiment of the present invention.

[0033] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0034] Figure 3 for Figure 1 Sectional view of section BB;

[0035] Figure 4 for Figure 3 A magnified view of a portion of point C in the middle;

[0036] Figure 5 for Figure 4 A magnified view of a portion of point D in the middle;

[0037] Figure 6 This is a perspective view of a first type of first separator in a battery pack according to an embodiment of the present utility model;

[0038] Figure 7 This is a top view of a second type of first separator in a battery pack according to an embodiment of the present utility model;

[0039] Figure 8 for Figure 4 The image shows a sectional view of the cover.

[0040] Figure 9 This is a perspective view of the frame of a battery pack according to an embodiment of the present utility model;

[0041] Figure 10 This is a top view of a liquid cooling plate of a battery pack according to an embodiment of the present invention;

[0042] Figure 11 This is a perspective view of a single cell of a battery pack according to an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 10. Enclosure; 101. Installation space; 102. Exhaust channel; 11. Liquid cooling plate; 110. Exhaust port row; 111. Exhaust port; 112. Cooling channel; 12. Frame; 121. Opening; 13. Bottom guard plate; 14. Cover;

[0045] 20. Individual battery cell; 201. Bottom wall; 21. Explosion-proof valve;

[0046] 30. First partition; 301. Clearance area; 31. Isolation section; 311. First connecting section; 312. Opening section; 313. Rib; 314. First notch; 315. Second notch; 32. Second connecting section;

[0047] 40. Second septum;

[0048] 50. Spring clip support;

[0049] X—first direction; Y—second direction; Z—third direction. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0051] The following is combined with Figures 1 to 11 The following describes embodiments of the present invention.

[0052] According to an embodiment of this utility model, in one aspect, a battery pack is provided, having intersecting first directions X, second directions Y, and third directions Z. (See also...) Figure 1 As shown, it includes: a housing 10, multiple battery cells 20, and a first separator 30;

[0053] Please see Figure 8 As shown, the enclosure 10 includes a cover 14, a liquid cooling plate 11, a frame 12, and a bottom protective plate 13. Please assemble them together. Figure 9 As shown, the frame 12 has two opposing openings 121 along the third direction Z. The cover 14 and the bottom protective plate 13 respectively cover one of the openings 121 and are arranged opposite to each other. The cover 14, the frame 12 and the bottom protective plate 13 together enclose a receiving cavity. The liquid cooling plate 11 is disposed in the receiving cavity and divides the receiving cavity into an installation space 101 and an exhaust channel 102. The installation space 101 is located between the cover 14 and the liquid cooling plate 11, and the exhaust channel 102 is located between the liquid cooling plate 11 and the bottom protective plate 13.

[0054] Please see Figure 10 As shown, the liquid cooling plate 11 has multiple exhaust holes 111 extending through the third direction Z, and the multiple exhaust holes 111 are arranged at intervals along the first direction X.

[0055] Multiple battery cells 20 are arranged along the first direction X and housed within the installation space 101; please refer to Figure 11 As shown, the battery cell 20 has a bottom wall 201 that faces the liquid cooling plate 11 along the third direction Z. The bottom wall 201 is connected to the liquid cooling plate 11, and an explosion-proof valve 21 is provided on the bottom wall 201. Multiple explosion-proof valves 21 and multiple vent holes 111 are arranged opposite to each other along the third direction Z.

[0056] The first partition 30 is disposed between the liquid cooling plate 11 and the bottom wall 201. Please refer to [link / reference]. Figure 6 As shown, the first partition 30 includes an isolation part 31 and a second connecting part 32. Multiple isolation parts 31 and multiple second connecting parts 32 are arranged alternately along the first direction X. Multiple isolation parts 31 and multiple exhaust holes 111 are arranged opposite to each other along the third direction Z. The second connecting part 32 connects two adjacent isolation parts 31.

[0057] In this regard, please combine Figure 7 As shown, along the second direction Y, the size L2 of the second connecting portion 32 is smaller than the size L1 of the isolation portion 31; and along the third direction Z, the projection of the second connecting portion 32 is at least partially located on the bottom wall 201.

[0058] The battery pack provided by this utility model has an installation space 101 formed between the cover 14 and the liquid cooling plate 11, in which multiple battery cells 20 are built into the installation space 101. The liquid cooling plate 11 and the bottom protective plate 13 are spaced apart along the third direction Z to form an exhaust channel 102. The exhaust holes 111 on the liquid cooling plate 11 and the explosion-proof valve 21 are positioned opposite each other along the third direction Z. When the explosion-proof valve 21 is opened, the ejected material can enter the exhaust channel 102 through the exhaust holes 111, which not only avoids the ejected material from affecting the battery cells 20 and improves the safety of the battery pack, but also leaves more installation space for the battery cells. By setting a first spacer 30 between the liquid cooling plate 11 and the battery cells 20, each first spacer 30 has multiple Each isolation section 31 is positioned opposite the explosion-proof valve 21 along the third direction Z. Each isolation section 31 is covered with a corresponding vent 111. When a certain battery cell 20 experiences thermal runaway, the ejected material is ejected from the explosion-proof valve 21 of that battery cell 20 under high pressure and breaks through the corresponding isolation section 31. After passing through the corresponding vent 111, the ejected material enters the exhaust channel 102. After the ejected material splashes and spreads in the exhaust channel 102, its temperature and pressure will decrease. At the same time, since the explosion-proof valves 21 of other normal battery cells 20 are all equipped with corresponding isolation sections 31 for protection, the ejected material is prevented from interfering with other normal battery cells 20, thus improving the safety of the battery pack.

[0059] Multiple first connecting parts 311 are connected by multiple second connecting parts 32 to form an integral structure, thereby enabling the first separator 30 to be positioned as a whole in a single operation, avoiding multiple positioning operations for multiple separator parts 31, and improving the assembly accuracy and efficiency of the battery pack. Along the second direction Y, the size L2 of the second connecting part 32 is smaller than the size L1 of the separator part 31, and along the third direction Z, the projections of the second connecting part 32 and the bottom wall 201 on the liquid cooling plate 11 at least partially overlap, thereby increasing the bonding area between the bottom wall 201 and the liquid cooling plate 11, improving the bonding strength between the cell 20 and the liquid cooling plate 11, and pressing the second connecting part 32 with the bottom wall 201 to prevent misalignment between the explosion-proof valve 21 and the vent 111.

[0060] It should be noted that the opening pressure threshold of the isolation section 31 is less than or equal to the opening pressure threshold of the explosion-proof valve 21, and the opening pressure threshold of the isolation section 31 is greater than the maximum pressure threshold of the exhaust channel 102. This allows the isolation section 31 to be opened by the high-temperature and high-pressure material ejected by the explosion-proof valve 21, but it will not be affected by the ejected material diffused in the exhaust channel 102, thereby protecting other normal battery cells 20 from interference and improving the safety of the battery pack.

[0061] Furthermore, the first spacer 30 can be a mica sheet or a microcellular polypropylene foam (MPP).

[0062] In some embodiments, see Figure 6 As shown, the isolation section 31 includes a first connecting section 311, an opening section 312, and a plurality of ribs 313. Here, "a plurality of" means that the number is two or more, for example, such as... Figure 6 As shown, the number of ribs 313 in a single isolation part 31 can be six, four, eight, etc.; the first connecting part 311 is arranged around the outer periphery of the opening part 312, and the first connecting part 311 and the outer periphery of the opening part 312 are spaced apart, and the ribs 313 are connected between the first connecting part 311 and the opening part 312; the opening part 312 and the explosion-proof valve 21 are arranged opposite each other along the third direction Z, the first connecting part 311 abuts against the liquid cooling plate 11 on one side along the third direction Z, and two adjacent first connecting parts 311 along the first direction X are connected by a second connecting part 32.

[0063] In this embodiment, the opening portion 312 is connected to the first connecting portion 311 by a number of ribs 313. When a certain cell 20 experiences thermal runaway, the ejected material is ejected from the explosion-proof valve 21 of the cell 20 under high pressure and impacts the opening portion 312 of the corresponding isolation portion 31, forcing the ribs 313 to break. This causes the opening portion 312 to fold open from the first connecting portion 311, allowing the ejected material to pass through the corresponding exhaust port 111 and enter the exhaust channel 102. The ribs 313 of the isolation portions 31 of other normal cell 20 remain connected, preventing the ejected material from interfering with other normal cell 20 and improving the safety of the battery pack.

[0064] Furthermore, the first connecting part 311, the opening part 312, and the several ribs 313 are integrally formed structures.

[0065] In some embodiments, see Figure 7 As shown, the isolation portion 31 has a first notch 314. The isolation portion 31 has an axis parallel to the third direction Z. The first notch 314 extends in the direction around the axis and divides the isolation portion 31 into a first connecting portion 311 and an opening portion 312. The first connecting portion 311 is disposed around the peripheral outer edge of the opening portion 312. Please refer to the diagram for further details. Figure 5 As shown, the opening part 312 and the explosion-proof valve 21 are arranged opposite each other along the third direction Z.

[0066] It should be noted that the depth of the first notch 314 along the third direction Z is less than the thickness of the isolation part 31.

[0067] In this embodiment, the isolation portion 31 is divided into a first connecting portion 311 and an opening portion 312 by the first notch 314. When a certain cell 20 experiences thermal runaway, the ejected material is ejected from the explosion-proof valve 21 of the cell 20 under high pressure and impacts the opening portion 312 of the corresponding isolation portion 31. This causes the opening portion 312 to break off from the first connecting portion 311 along the first notch 314, allowing the ejected material to pass through the corresponding exhaust port 111 and enter the exhaust channel 102. The isolation portions 31 of other normal cell 20 remain connected, preventing the ejected material from interfering with other normal cell 20 and improving the safety of the battery pack.

[0068] In some embodiments, see Figure 1 As shown, the battery pack includes a plurality of first spacers 30, which are spaced apart along a second direction Y.

[0069] In this embodiment, multiple vent holes 111 on the liquid cooling plate 11 are spaced apart along the first direction X to form vent hole rows 110, and multiple vent hole rows 110 are spaced apart along the second direction Y; multiple first partitions 30 are spaced apart along the second direction Y, and each first partition 30 is disposed between a vent hole row 110 and an explosion-proof valve 21. Each first partition 30 includes multiple isolation parts 31 and multiple second connecting parts 32. The multiple isolation parts 31 and multiple second connecting parts 32 are arranged alternately along the first direction X, and the multiple isolation parts 31 and multiple vent holes 111 are arranged one-to-one opposite to each other along the third direction Z. The second connecting parts 32 connect two adjacent isolation parts 31, so that each cell 20 has an isolation part 31 between its explosion-proof valve 21 and its corresponding vent hole 111 for protection, avoiding the interference of ejected substances to other normal cell 20 and improving the safety of the battery pack.

[0070] In some embodiments, please combine Figure 1 , Figure 6 and Figure 7 As shown, a clearance area 301 is formed between two adjacent first connecting parts 311 and second connecting parts 32, and the clearance area 301 is used to fill the adhesive layer.

[0071] In this embodiment, by forming an avoidance area 301 between two adjacent first connecting portions 311 and second connecting portions 32, the bonding area between the battery cell 20 and the liquid cooling plate 11 is maximized to ensure the bonding force between the battery cell 20 and the liquid cooling plate 11.

[0072] In some embodiments, see Figure 6 and Figure 7 As shown, the opening portion 312 is formed by one or more second grooves 315 along the third direction Z.

[0073] In this embodiment, by forming a second notch 315 on the opening portion 312, the exhaust area of ​​the isolation portion 31 after opening is increased, and the consistency of the opening path of the isolation portion 31 is improved.

[0074] In some embodiments, see Figure 5 As shown, the battery pack also includes a second separator 40, which is made of high-temperature resistant and insulating material. The second separator 40 is attached to the side of the bottom protective plate 13 facing the liquid cooling plate 11 in the third direction Z.

[0075] The second partition 40 and the exhaust port 111 are positioned opposite each other along the third direction Z.

[0076] In this embodiment, by providing a second partition 40 in the exhaust channel 102 and positioning the second partition 40 opposite to the exhaust port 111 along the third direction Z, when a certain battery cell 20 experiences thermal runaway, the ejected material is ejected from the explosion-proof valve 21 of the battery cell 20 under high pressure and enters the exhaust channel 102 through the corresponding exhaust port 111. Due to the blocking effect of the second partition 40, the heat of the ejected material is effectively prevented from being transferred to the bottom protective plate 13 and other components, effectively reducing the risk of fire. At the same time, through the insulation effect of the second partition 40, short circuits caused under thermal runaway conditions are effectively prevented, ensuring the electrical safety of the battery pack.

[0077] Furthermore, the second spacer 40 can be a mica sheet.

[0078] In some embodiments, please combine Figure 4 and Figure 5 As shown, the battery pack also includes a spring clip bracket 50, which is supported between the liquid cooling plate 11 and the bottom protective plate 13. The spring clip bracket 50 is disposed on at least one side of the second spacer 40 along the second direction Y.

[0079] In this embodiment, by supporting the spring clip bracket 50 between the liquid cooling plate 11 and the bottom protective plate 13, the collapse between the liquid cooling plate 11 and the bottom protective plate 13 is avoided, thereby ensuring the unobstructed flow of the exhaust channel 102.

[0080] In some embodiments, please combine Figure 1 and Figure 4 As shown, the liquid cooling plate 11 has multiple cooling channels 112, which are located between two adjacent exhaust holes 111. The cooling channels 112 and the exhaust channels 102 are independently arranged, and the cooling medium is suitable for flowing in the cooling channels 112.

[0081] In this embodiment, by setting a cooling channel 112 between two adjacent exhaust channels 102, and the cooling channel 112 and the exhaust channel 102 are set independently, the battery cell 20 can be cooled, and the ejected material diffused in the exhaust channel 102 can be cooled at the same time, thereby improving the safety of the battery pack.

[0082] According to an embodiment of the present invention, another aspect provides an electrical device, including: a device body, and a battery pack as described above.

[0083] In this embodiment, the electrical equipment uses the aforementioned battery pack. When a single cell 20 experiences thermal runaway, the ejected material is ejected from the explosion-proof valve 21 of that single cell 20 under high pressure and breaks through the corresponding isolation part 31. The ejected material passes through the corresponding exhaust port 111 and enters the exhaust channel 102. After the ejected material splashes and spreads in the exhaust channel 102, its temperature and pressure will decrease. At the same time, since the explosion-proof valves 21 of other normal single cells 20 are all equipped with corresponding isolation parts 31 for protection, the ejected material is prevented from interfering with other normal single cells 20, thereby improving the safety of the battery pack and the entire electrical equipment.

[0084] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack having intersecting first directions (X), second directions (Y), and a third direction (Z), characterized in that, include: The enclosure (10), multiple battery cells (20), and the first separator (30); The housing (10) includes a cover (14), a liquid cooling plate (11), a frame (12), and a bottom protective plate (13). The frame (12) has two opposing openings (121) along the third direction (Z). The cover (14) and the bottom protective plate (13) are respectively sealed to one of the openings (121) and are arranged opposite to each other. The cover (14), the frame (12), and the bottom protective plate (13) together enclose a receiving cavity. The liquid cooling plate (11) is disposed in the receiving cavity and divides the receiving cavity into an installation space (101) and an exhaust channel (102). The installation space (101) is located between the cover (14) and the liquid cooling plate (11), and the exhaust channel (102) is located between the liquid cooling plate (11) and the bottom protective plate (13). The liquid cooling plate (11) has a plurality of exhaust holes (111) extending through the third direction (Z), and the plurality of exhaust holes (111) are arranged at intervals along the first direction (X); Multiple battery cells (20) are arranged along the first direction (X) and built into the installation space (101); each battery cell (20) has a bottom wall (201) facing the liquid cooling plate (11) along a third direction (Z), the bottom wall (201) is connected to the liquid cooling plate (11), and an explosion-proof valve (21) is provided on the bottom wall (201); multiple explosion-proof valves (21) and multiple vent holes (111) are arranged opposite to each other along the third direction (Z); The first partition (30) is disposed between the liquid cooling plate (11) and the bottom wall (201). The first partition (30) includes an isolation part (31) and a second connecting part (32). A plurality of isolation parts (31) and a plurality of second connecting parts (32) are arranged alternately along the first direction (X). A plurality of isolation parts (31) and a plurality of exhaust holes (111) are arranged opposite to each other along the third direction (Z). The second connecting part (32) connects two adjacent isolation parts (31). Along the second direction (Y), the size (L2) of the second connecting portion (32) is smaller than the size (L1) of the isolation portion (31); and along the third direction (Z), the projection of the second connecting portion (32) is at least partially located on the bottom wall (201).

2. The battery pack according to claim 1, characterized in that, The isolation section (31) includes a first connecting section (311), an opening section (312), and a plurality of ribs (313); the first connecting section (311) is arranged around the outer periphery of the opening section (312), and the first connecting section (311) and the opening section (312) are spaced apart, and the ribs (313) are connected between the first connecting section (311) and the opening section (312); the opening section (312) and the explosion-proof valve (21) are arranged opposite to each other along the third direction (Z), the first connecting section (311) abuts against the liquid cooling plate (11) on one side along the third direction (Z), and two adjacent first connecting sections (311) along the first direction (X) are connected by a second connecting section (32).

3. The battery pack according to claim 1, characterized in that, The isolation section (31) is provided with a first notch (314). The isolation section (31) has an axis parallel to the third direction (Z). The first notch (314) extends along the direction around the axis and divides the isolation section (31) into a first connecting section (311) and an opening section (312). The first connecting section (311) is arranged around the peripheral outer edge of the opening section (312). The opening section (312) and the explosion-proof valve (21) are arranged opposite to each other along the third direction (Z).

4. The battery pack according to claim 2, characterized in that, The battery pack includes a plurality of first separators (30), which are spaced apart along the second direction (Y).

5. The battery pack according to claim 4, characterized in that, An avoidance area (301) is formed between two adjacent first connecting parts (311) and second connecting parts (32), and the avoidance area (301) is used to fill the adhesive layer.

6. The battery pack according to claim 2 or 3, characterized in that, The opening (312) is formed by one or more second grooves (315).

7. The battery pack according to any one of claims 1-3, characterized in that, The battery pack also includes a second separator (40), which is attached to the side of the bottom protective plate (13) facing the liquid cooling plate (11) in a third direction (Z); The second partition (40) and the exhaust port (111) are arranged opposite each other in the third direction (Z).

8. The battery pack according to claim 7, characterized in that, The battery pack also includes a spring clip bracket (50) supported between the liquid cooling plate (11) and the bottom protective plate (13), and the spring clip bracket (50) is disposed on at least one side of the second partition (40) along the second direction (Y).

9. The battery pack according to any one of claims 1-3, characterized in that, The liquid cooling plate (11) has multiple cooling channels (112), which are located between two adjacent exhaust holes (111) and are suitable for the flow of cooling medium.

10. An electrical appliance, characterized in that, include: The device body, and the battery pack as described in any one of claims 1 to 9 above.

Images