Battery pack and power device

Abstract

The present invention relates to the technical field of power batteries, and discloses a battery pack and an electric device, the electric device comprising a battery pack; the battery pack comprises a box, a plurality of single cells and a crossbeam; the plurality of single cells are arranged in the box at intervals, and a gap is provided between two adjacent single cells; the crossbeam is provided in the accommodating cavity, the crossbeam is detachably connected to the box, the crossbeam is provided between two adjacent single cells, and is sealed to the two adjacent single cells, and the crossbeam, the plurality of single cells and the box form a flow channel. By providing a flow channel in the box, and sealing the flow channel by fitting the crossbeam with the shell, the coolant can flow in the flow channel, and then the coolant is in direct contact with the single cells for heat transfer, thereby improving the heat transfer efficiency and the heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a battery pack. Background Art

[0002] In recent years, with the continuous development of new energy vehicles, power batteries, as the power source of new energy batteries, have been widely used in new energy vehicles. Single batteries will generate a lot of heat during use. If the heat is accumulated in the box and not discharged in time, it will directly affect the performance, safety and service life of the battery pack. Therefore, the heat dissipation system is an indispensable system for the battery pack. The current heat dissipation system mainly uses air cooling and liquid cooling.

[0003] Existing liquid-cooled heat dissipation systems all pass the coolant into a liquid cooling plate, and then fit the liquid cooling plate to the single battery for heat transfer. The coolant and the single battery are heat transferred through the liquid cooling plate as an intermediate medium, which will cause problems such as uneven heat transfer and poor heat transfer efficiency, affecting the heat dissipation effect. Summary of the invention

[0004] The technical problems to be solved by the present invention are:

[0005] The liquid cooling plate is used as an intermediate medium for heat transfer, but the heat transfer efficiency is poor, which affects the heat dissipation effect.

[0006] In order to solve the above technical problem, the present invention provides a battery pack, wherein the battery pack has a first direction and a second direction intersecting each other, and comprises:

[0007] A box body, wherein a receiving cavity is provided in the box body;

[0008] A plurality of single cells, wherein the plurality of single cells are arranged in the accommodation cavity at intervals along the second direction, and a gap is provided between two adjacent single cells along the first direction; and

[0009] A crossbeam is arranged in the accommodating cavity, the crossbeam extends along the first direction and is detachably connected to the box body, the crossbeam is arranged between two adjacent single cells and is sealedly connected to the two adjacent single cells, and the crossbeam, multiple single cells and the box body form a flow channel.

[0010] In one embodiment, a plurality of the cross beams are provided, and the plurality of the cross beams are arranged at intervals along the second direction. The single cells have a plurality of rows in the second direction, and the cross beams are provided between two adjacent rows of cells.

[0011] In one of the embodiments, the single cell includes a shell and a top cover covering the shell, the top cover is arranged on the same side of each of the single cells, and the cross beam is arranged between two adjacent top covers and fits with the shell to prevent the coolant in the flow channel from contacting the side of the top cover facing away from the shell.

[0012] In one embodiment, the crossbeam includes a connecting block and a seal; the connecting block is detachably connected to the box body, the seal is in the shape of a long strip extending along the first direction, the connecting blocks are arranged at both ends of the seal in the first direction, and the sealing strip is tightly fitted with the shell.

[0013] In one of the embodiments, the box body is provided with slots; the slots are arranged on the box body at intervals along the second direction, and the connecting blocks are correspondingly inserted into the slots.

[0014] In one of the embodiments, the connecting block is in a "T" shape, the slot corresponds to the shape of the connecting block, and the slot is arranged in a "T"-shaped groove shape.

[0015] In one embodiment, the single battery further includes a mounting bar; the mounting bar is in a long strip shape and extends along the first direction, and the mounting bar is relatively arranged on two sides of the housing along the second direction.

[0016] In one of the embodiments, the seal includes an extension portion and a positioning portion; the extension portion is in contact with the shell along two side surfaces in the second direction, the positioning portion is arranged on a side of the extension portion close to the top cover, the positioning portion is in contact with the mounting strip, and the positioning portion is used to position the installation position between the crossbeam and the single cell.

[0017] In one of the embodiments, in the second direction, the positioning parts are spaced apart at one end of the extension part close to the top cover; buckle grooves are provided on the mounting bar, and the spaced apart positioning parts are respectively inserted into the buckle grooves of the single cells on both sides.

[0018] In one of the embodiments, in the second direction, the positioning portion is relatively arranged at the middle position of the extension portion, so that the end of the seal close to the mounting bar is in a "convex" shape, and the seal is inserted between the mounting bars of the single battery cells on both sides, and the seal is in contact with the mounting bars on both sides.

[0019] In one of the embodiments, in the second direction, the two side walls of the positioning portion extend from the extension portion toward the mounting bar; an inclined surface is provided on the mounting bar, the inclined surface corresponds to the shape of the positioning portion, and the inclined surface presses against the positioning portion.

[0020] An electrical device comprises the above-mentioned battery pack.

[0021] Compared with the prior art, the above battery pack has the following advantages:

[0022] A flow channel is formed by a crossbeam, a plurality of single cells and a housing, and the flow channel is sealed by fitting the crossbeam and the housing, so that the coolant can flow in the flow channel, and then the coolant is in direct contact with the single cell for heat transfer, thereby improving the heat transfer efficiency and the heat dissipation effect.

[0023] By detachably connecting the crossbeam and the box body, the installation position of the crossbeam can be adjusted to meet the installation requirements of single cells of different specifications and improve the adaptability of use. The box body can load single cells of different specifications and reduce production costs.

[0024] By arranging a slot on the box body and a connecting block on the crossbeam, and arranging the connecting block and the slot into a "T" shape, the crossbeam can be quickly installed into the box body and fixed with the box body, simplifying the disassembly and assembly operations and facilitating later maintenance.

[0025] By relatively arranging the positioning part at the middle position of the extension part, the end of the seal close to the mounting strip is in a "convex" shape, and the seal fits with the mounting strips on both sides, thereby improving the positioning accuracy of the crossbeam for the installation position of the single battery and improving the accuracy of the battery cell installation position.

[0026] By arranging the positioning parts at intervals at one end of the extension part close to the top cover, and providing buckle grooves on the mounting strip, the interval positioning parts can be respectively inserted into the buckle grooves of the single cells on both sides, thereby improving the sealing performance at the joint position between the cross beam and the single cell, thereby preventing the coolant in the flow channel from leaking to the top cover of the single cell.

[0027] By extending the two side walls of the positioning portion from the extension portion toward the mounting bar, and providing an inclined surface on the mounting bar, the inclined surface is pressed against the positioning portion, and by slanting the joint surface, the single cell will automatically return to the center position under the action of the gravity of the single cell, and at the same time increase the pressure between the mounting bar and the positioning portion, thereby improving the stability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a battery pack according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the battery pack;

[0030] Figure 3 for Figure 2 The structural diagram of the middle box;

[0031] Figure 4 for Figure 2 Schematic diagram of the structure of a single cell;

[0032] Figure 5 for Figure 4 A schematic diagram of the structure of a single cell from another angle;

[0033] Figure 6 for Figure 2 Structural diagram of the middle crossbeam;

[0034] Figure 7 for Figure 1 A schematic cross-sectional view of a battery pack;

[0035] Figure 8 for Figure 7 An enlarged schematic diagram of the middle circle A portion;

[0036] Fig. 9 is a schematic cross-sectional view of a battery pack according to a second embodiment of the present invention;

[0037] Fig.10 for Fig. 9 An enlarged schematic diagram of the middle circle B portion;

[0038] Fig.11 is a schematic cross-sectional view of a battery pack according to a third embodiment of the present invention;

[0039] Fig.12 for Fig.11 Enlarged schematic diagram of the circled portion C.

[0040] The meanings of the numbers in the accompanying drawings are:

[0041] 100. Battery pack;

[0042] 10. Box body; 101. Accommodating chamber; 11. Flow channel; 15. Socket; 16. First explosion-proof valve; 17. Liquid inlet pipe; 18. Liquid outlet pipe;

[0043] 20. Single battery; 21. Shell; 22. Winding core; 23. Top cover; 25. Mounting strip; 26. Second explosion-proof valve;

[0044] 30. cross beam; 31. connecting block; 32. sealing strip; 35. extension part; 36. positioning part;

[0045] 40. Cover plate;

[0046] 200, battery pack;

[0047] 20a, single battery; 25a, mounting strip; 27, buckle slot;

[0048] 32a, sealing strip; 35a, extending portion; 36a, positioning portion;

[0049] 300, battery pack;

[0050] 20b, single battery; 25b, mounting bar; 28, inclined surface;

[0051] 32b, sealing strip; 35b, extending portion; 36b, positioning portion. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0058] It should be noted that according to Figure 1 and 2 As shown, in the embodiment of the present invention, the X-axis direction intersects with the Y-axis direction. For the convenience of explanation, the first direction is defined as the X-axis direction, and the second direction is defined as the Y-axis direction. In this embodiment, the X-axis direction and the Y-axis direction are coplanar and perpendicular to each other. Further explanation, the definition of vertical in the specification should be understood as vertical within a 90-degree fluctuation of 10%, that is, the angle between the defined first direction and the second direction should be understood as vertical if it is between 80 degrees and 90 degrees.

[0059] See also Figures 1 to 8 , is a battery pack 100 of the first embodiment of the present invention, comprising a box body 10, a single cell 20 and a crossbeam 30. The box body 10 is provided with a receiving chamber 101, and the receiving chamber 101 is used to receive the single cell 20 and the crossbeam 30. The single cell 20 is provided with a plurality of single cells 20, and the plurality of single cells 20 are arranged in the receiving chamber 101 at intervals along the second direction, and a gap is provided between two adjacent single cells 20. The single cell 20 is the core power supply component of the battery pack 100. The crossbeam 30 is provided in the receiving chamber 101, and the crossbeam 30 is extended along the first direction, and the crossbeam 30 is detachably connected to the box body 10, and the crossbeam 30 is provided between two adjacent single cells 20, and is sealed and connected to the two adjacent single cells 20. The crossbeam 30, the plurality of single cells 20 and the box body 10 enclose a flow channel 11, and the flow channel 11 is used to receive the coolant, thereby ensuring that the coolant flows in the box body 10.

[0060] There are a plurality of cross beams 30 , which are spaced apart along the second direction Y. The single cells 20 have a plurality of rows in the second direction Y, and a cross beam 30 is disposed between two adjacent rows of cells 20 .

[0061] The flow channel 11 and the crossbeam 30 are both extended along the first direction X, and the single cell 20 is relatively arranged on both sides of the flow channel 11 along the second direction Y; the single cell 20 includes a shell 21 and a top cover 23 covering the shell 21, and the top cover 23 is arranged on the same side of each single cell 20. The top cover 23 is provided with electrodes to conduct the electric energy of the single cell 20 to the outside. The crossbeam 30 is arranged between two adjacent top covers 23 and fits with the shell 21 to prevent the coolant in the flow channel 11 from contacting the top cover 23; the crossbeam 30 is used to support the installation position of the single cell 20 and seal the coolant in the flow channel 11 to prevent the coolant from leaking to the top cover 23 and causing the risk of electrical connection.

[0062] Furthermore, the box body 10 is provided with a hollow structure, and the interior of the box body 10 is used to accommodate the single battery 20; the battery pack 100 also includes a cover plate 40, and the cover plate 40 is sealed on the box body 10 to form a relatively closed space in the box body 10. In this embodiment, the box body 10 is provided with a first explosion-proof valve 16, and the first explosion-proof valve 16 is installed on one side of the box body 10, so that when an explosion occurs in the box body 10, the first explosion-proof valve 16 can quickly release the pressure in the box body 10 to prevent explosion.

[0063] Furthermore, the flow channel 11 is in the shape of a long strip, and the flow channel 11 is evenly spaced along the second direction in the box body 10. In this embodiment, the box body 10 is provided with a liquid inlet pipe 17 and a liquid outlet pipe 18; the liquid inlet pipe 17 and the liquid outlet pipe 18 are relatively arranged on both sides of the box body 10 along the first direction, and the liquid inlet pipe 17 and the liquid outlet pipe 18 are respectively connected to the two ends of the flow channel 11 to ensure the flow of the coolant in the flow channel 11.

[0064] Furthermore, the shell 21 is a hollow rectangular structure, and the top cover 23 is a rectangular straight plate. The top cover 23 is sealed on the shell 21 to form a relatively closed space inside the shell 21. It can be understood that the single battery 20 also includes a winding core 22, which is used to generate electric energy. The winding core 22 is wound by a positive electrode sheet, a negative electrode sheet and a diaphragm. The winding core 22 is arranged in the shell 21 and is sealed by the top cover 23. In this embodiment, a second explosion-proof valve 26 is provided on the shell 21. The second explosion-proof valve 26 is installed on one side of the shell 21. The second explosion-proof valve 26 is used to release the pressure in the shell 21 when a deflagration occurs in the shell 21, thereby preventing the single battery 20 from exploding. Specifically, the second explosion-proof valve 26 is installed on the side of the shell 21 away from the top cover 23.

[0065] Furthermore, the cross beam 30 includes a connecting block 31 and a seal 32. The connecting block 31 is detachably connected to the box body 10, the seal 32 is in a long strip shape and extends along the first direction, the connecting blocks 31 are correspondingly arranged at both ends of the seal 32 in the first direction, and the seal 32 is tightly fitted with the housing 21 to ensure the sealing of the cross beam 30 and the single battery 20 at the joint position.

[0066] Furthermore, the box body 10 is provided with slots 15, which are relatively arranged on both sides of the box body 10, and the slots 15 are arranged on the box body 10 at intervals along the second direction, and the connecting block 31 is correspondingly inserted into the slots 15 to fix the crossbeam 30 in the box body 10 in a detachable manner, and the disassembly and assembly operation is convenient and quick. In this embodiment, the connecting block 31 is in a "T" shape, and the slot 15 corresponds to the shape of the connecting block 31. The slot 15 is correspondingly arranged in a "T"-shaped groove shape to prevent the connecting block 31 from shaking in the slot 15, thereby improving the stability of the connection between the crossbeam 30 and the box body 10. It can be understood that according to the insertion of the connecting block 31 into the slot 15 at different positions, the distance between two adjacent crossbeams 30 can be adjusted, thereby meeting the installation and use requirements of single cells 20 of different sizes and improving the adaptability of use.

[0067] Furthermore, the single cell 20 further includes a mounting bar 25. The mounting bar 25 is in a long strip shape and extends along the first direction. The mounting bar 25 is relatively arranged on both sides of the housing 21 along the second direction. The mounting bar 25 abuts against the sealing bar 32 to ensure that the crossbeam 30 supports and mounts the single cell 20, and the single cell 20 is positioned and mounted in the box body 10.

[0068] Furthermore, the seal strip 32 includes an extension portion 35 and a positioning portion 36. The extension portion 35 is in a rectangular strip shape and extends along the first direction. The two side surfaces of the extension portion 35 along the second direction are in contact with the housing 21 to ensure the sealing of the joint between the cross beam 30 and the single battery 20. The positioning portion 36 is disposed on a side of the extension portion 35 close to the top cover 23. The positioning portion 36 abuts against the mounting strip 25 and is used to locate the mounting position between the cross beam 30 and the single battery 20.

[0069] Furthermore, in the second direction, the positioning portion 36 is relatively arranged at the middle position of the extension portion 35. The positioning portion 36 is protruded from the extension portion 35 toward the top cover 23, so that the end of the seal 32 close to the mounting strip 25 is in a "convex" shape. The seal 32 is inserted between the mounting strips 25 of the single cells 20 on both sides. The seal 32 is fitted with the mounting strips 25 on both sides. The seal 32 positions the end positions of the mounting strips 25 on both sides, and then positions the installation position of the single cell 20, thereby improving the installation accuracy of the single cell 20.

[0070] See also Figures 9 and 10, is a battery pack 200 of the second embodiment of the present invention. The difference between the battery pack 200 of this embodiment and the battery pack 100 of the first embodiment is that in the battery pack 200 of this embodiment, the positioning portion 36a is arranged at intervals at one end of the extension portion 35a close to the top cover in the second direction. Specifically, in this embodiment, two positioning portions 36a are arranged on the same seal 32a, and the two positioning portions 36a are respectively arranged on both sides of the extension portion 35a in the second direction. The mounting bar 25a is provided with a buckle groove 27, which is in the shape of a long strip and extends along the first direction. The buckle groove 27 corresponds to the setting position of the positioning portion 36a, and the positioning portions 36a arranged at intervals are respectively inserted into the buckle grooves 27 of the single batteries 20a on both sides.

[0071] By providing a buckle groove 27 on the mounting strip 25a and inserting the positioning portion 36a into the buckle groove 27, the sealing performance at the position where the seal 32a and the single battery 20a are directly connected is improved; by providing the seal 32a with one end close to the top cover in a U shape so that the seal 32a is hooked in the buckle groove 27 through the positioning portion 36a, the installation positions of the single batteries 20a on both sides can be positioned, thereby improving the installation accuracy.

[0072] See also Figure 11 to Figure 12 , is a battery pack 300 of the third embodiment of the present invention. The difference between the battery pack 300 of this embodiment and the battery pack 100 of the first embodiment is that in the battery pack 300 of this embodiment, the two side walls of the positioning portion 36b extend from the extension portion 35b to the mounting bar 25b in the second direction, that is, the positioning portion 36b is arranged in a triangular prism shape, and in the direction perpendicular to the common surface of the first direction and the second direction, the positioning portion 36b is arranged in a triangular shape. The mounting bar 25b is provided with an inclined surface 28, which corresponds to the shape of the positioning portion 36b, and the inclined surface 28 presses against the positioning portion 36b.

[0073] By extending the two side walls of the positioning portion 36b from the extension portion 35b toward the mounting bar 25b, the positioning portion 36b is arranged in a triangular prism shape, and by providing an inclined surface 28 on the mounting bar 25b, the joint surface between the seal 32b and the single battery 20b is inclined, so that the self-weight of the single battery 20b will be converted into a component force along the direction of the inclined surface 28 and a component force along the direction perpendicular to the inclined surface 28. The component force along the direction of the inclined surface 28 will cause the single battery 20b to automatically return to the center, and the component force perpendicular to the direction of the inclined surface 28 will improve the sealing of the joint position between the single battery 20b and the seal 32b, thereby improving the reliability of the overall battery pack.

[0074] The present invention further discloses an electric device, which includes the battery pack 100 mentioned above, and the battery pack 100 provides the electric device with electric energy required for operation.

[0075] The working process of the present invention is as follows: during installation, the installation position of the crossbeam 30 is first determined according to the size of the single battery 20, and the connecting block 31 of the crossbeam 30 is inserted into the slot 15 corresponding to the installation position; after the crossbeam 30 is installed, the single battery 20 is inserted between two adjacent crossbeams 30, so that the seal 32 of the crossbeam 30 fits with the shell 21 of the single battery 20, and the positioning part 36 and the installation strip 25 cooperate to locate the installation position of the single battery 20. After the single battery 20 and the crossbeam 30 are installed, the cover plate 40 is connected to the box 10, and the single battery 20 is encapsulated in the box 10. At this time, the flow channel 11 in the box 10 is blocked by the crossbeam 30 to form a relatively closed space for the coolant to pass through, and the coolant can directly contact the shell 21 of the single battery 20, thereby improving the heat dissipation efficiency.

[0076] In summary, the embodiment of the present invention provides a battery pack 100, which has the following beneficial effects:

[0077] 1. The flow channel 11 is enclosed by the crossbeam 30, multiple single cells 20 and the box body 10, and the flow channel 11 is blocked by the crossbeam 30 and the shell 21, so that the coolant can flow in the flow channel 11, and then the coolant is in direct contact with the single cell 20 for heat transfer, thereby improving the heat transfer efficiency and the heat dissipation effect.

[0078] 2. By making the crossbeam 30 and the box body 10 detachably connected, the installation position of the crossbeam 30 can be adjusted to meet the installation requirements of single cells 20 of different specifications and improve the adaptability of use. The box body 10 can load single cells 20 of different specifications and reduce production costs.

[0079] 3. By setting a slot 15 on the box body 10 and a connecting block 31 on the beam 30, the connecting block 31 and the slot 15 are set to be in a "T" shape, so that the beam 30 can be quickly installed in the box body 10 and fixed with the box body 10, the disassembly and assembly operations are assimilated, and later maintenance is convenient.

[0080] 4. By relatively arranging the positioning portion 36 at the middle position of the extension portion 35, the end of the seal 32 close to the mounting strip 25 is in a "convex" shape, and the seal 32 fits with the mounting strips 25 on both sides, thereby improving the positioning accuracy of the cross beam 30 for the installation position of the single battery 20 and improving the accuracy of the battery cell installation position.

[0081] 5. By arranging the positioning portion 36 at intervals at one end of the extension portion 35 close to the top cover 23 and providing a buckle groove 27 on the mounting bar 25, the interval positioning portion 36 can be respectively inserted into the buckle groove 27 of the single battery 20 on both sides, thereby improving the sealing performance at the joint position between the cross beam 30 and the single battery 20, thereby preventing the coolant in the flow channel 11 from leaking to the top cover 23 of the single battery 20.

[0082] 6. By extending the two side walls of the positioning portion 36 from the extension portion 35 toward the mounting bar 25, and providing an inclined surface 28 on the mounting bar 25, the inclined surface 28 is pressed against the positioning portion 36, and by slanting the joint surface, the single cell 20 will automatically return to the center position under the action of the gravity of the single cell 20, and at the same time increase the pressure between the mounting bar 25 and the positioning portion 36, thereby improving the stability of the battery pack 100.

[0083] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A battery pack (100), the battery pack having a first direction (X) and a second direction (Y) intersecting each other, characterized in that: include: A box body (10), wherein a receiving cavity (101) is provided in the box body (10); a plurality of single cells (20), wherein the plurality of single cells (20) are arranged in the accommodating cavity (101) at intervals along the second direction (Y), and a gap is provided between two adjacent single cells (20) along the first direction (X); and a crossbeam (30) disposed in the accommodating cavity (101); the crossbeam (30) is extended along the first direction (X) and is detachably connected to the box body (10); the crossbeam (30) is disposed between two adjacent single cells (20) and is sealed to the two adjacent single cells (20); the crossbeam (30), the plurality of single cells (20) and the box body (10) enclose a flow channel (11); A plurality of the cross beams (30) are provided, and the plurality of the cross beams (30) are arranged at intervals along the second direction (Y); the single cells (20) have a plurality of rows in the second direction (Y), and the cross beams (30) are provided between two adjacent rows of single cells (20); The single battery (20) comprises a shell (21) and a top cover (23) covering the shell (21), the top cover (23) being arranged on the same side of each single battery (20), the crossbeam (30) being arranged between two adjacent top covers (23) and being in contact with the shell (21) to prevent the coolant in the flow channel (11) from contacting a side of the top cover (23) facing away from the shell (21); The crossbeam (30) comprises a connecting block (31) and a sealing strip (32); the connecting block (31) is detachably connected to the box body (10); the sealing strip (32) is in a long strip shape and extends along the first direction (X); the connecting blocks (31) are arranged at both ends of the sealing strip (32) in the first direction (X); and the sealing strip (32) is tightly fitted to the shell (21); The single battery (20) further comprises a mounting bar (25); the mounting bar (25) is in the shape of a long strip and extends along the first direction (X); the mounting bar (25) is relatively arranged on two sides of the housing (21) along the second direction (Y); The seal strip (32) comprises an extension portion (35) and a positioning portion (36); the two side surfaces of the extension portion (35) along the second direction (Y) are in contact with the housing (21); the positioning portion (36) is arranged on a side of the extension portion (35) close to the top cover (23); the positioning portion (36) is in contact with the mounting strip (25); and the positioning portion (36) is used to locate the mounting position between the crossbeam (30) and the single battery (20).

2. The battery pack (100) according to claim 1, characterized in that: The box body (10) is provided with slots (15); the slots (15) are arranged on the box body (10) at intervals along the second direction (Y), and the connection blocks (31) are correspondingly inserted into the slots (15).

3. The battery pack (100) according to claim 2, characterized in that: The connection block (31) is in a "T" shape, the slot (15) corresponds to the shape of the connection block (31), and the slot (15) is correspondingly arranged in a "T"-shaped groove shape.

4. The battery pack (100) according to claim 1, characterized in that: In the second direction (Y), the positioning portions (36) are arranged at intervals at one end of the extension portion (35) close to the top cover (23); the mounting bar (25) is provided with buckle grooves (27), and the positioning portions (36) arranged at intervals are respectively inserted into the buckle grooves (27) of the single batteries (20) on both sides.

5. The battery pack (100) according to claim 1, characterized in that: In the second direction (Y), the positioning portion (36) is relatively arranged at a middle position of the extension portion (35), so that the end of the seal (32) close to the mounting bar (25) is in a "convex" shape, and the seal (32) is inserted between the mounting bars (25) of the single batteries (20) on both sides, and the seal (32) is in contact with the mounting bars (25) on both sides.

6. The battery pack (100) according to claim 1, characterized in that: In the second direction (Y), two side walls of the positioning portion (36) extend from the extension portion (35) towards the mounting strip (25); an inclined surface is provided on the mounting strip (25), the inclined surface corresponds to the shape of the positioning portion (36), and the inclined surface presses against the positioning portion (36).

7. An electrical device, characterized in that: Comprising a battery pack (100) as claimed in any one of claims 1 to 6.

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