Battery pack box body and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack box body and a battery pack, the battery pack box body comprises a heat management plate and a frame; the frame is provided with a first target surface, the first target surface is arranged on the side, facing the heat management plate in the third direction, of the frame, and the first target surface abuts against the heat management plate in the third direction; the heat management plate comprises a first plate body and a second plate body which are oppositely arranged in a spaced mode in the third direction, the first plate body abuts against the first target surface, the first plate body and the frame jointly define a first containing bin, and the interior of the first containing bin is suitable for containing a battery cell; the frame is further provided with an extending edge, and the extending edge is formed by extending the first target face in the direction close to the second plate body in the third direction. The extending edge surrounds the circumferential edge of the second plate body by a circle and forms a second containing bin with the first plate body and the second plate body in an enclosing mode, and the second containing bin is a closed containing cavity. According to the battery pack box body provided by the utility model, the heat loss of the battery pack can be reduced.

Description

Technical Field

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

[0002] The battery pack enclosure needs to adapt to various temperature conditions during daily use. The battery pack needs to operate normally at temperature points ranging from -20℃ to 60℃. In order to meet the stringent requirements of this type of project, the heat dissipation and insulation of the battery pack need to be continuously adjusted. The heat dissipation part can be accomplished by a liquid cooling system. However, when facing low temperature conditions, the liquid cooling system completely fails and cannot reduce heat loss. Utility Model Content

[0003] In view of this, the present invention provides a battery pack housing and a battery pack to reduce the external heat exchange rate of the battery pack and reduce heat loss.

[0004] In a first aspect, this utility model provides a battery pack housing having a three-dimensional shape with intersecting first, second, and third directions, comprising:

[0005] A thermal management plate and a frame; the frame has a first target surface, the first target surface is located on the side of the frame facing the thermal management plate in a third direction, and the first target surface abuts against the thermal management plate in a third direction;

[0006] The thermal management board includes a first plate and a second plate that are spaced apart from each other along a third direction. The first plate abuts against a first target surface and together with a frame, forms a first receiving compartment, which is suitable for accommodating a battery cell. The second plate is located on the side of the first plate that is away from the first target surface along a third direction.

[0007] The frame also has an extension edge, which extends from the first target surface in a third direction toward the second plate; the extension edge surrounds the circumferential edge of the second plate and together with the first plate and the second plate to form a second receiving compartment, which is a sealed cavity.

[0008] Beneficial effects: The battery pack housing provided by this utility model first fills the second containment chamber with inert gas to a certain pressure value at room temperature and then seals it. When the ambient temperature drops, as the activity of the inert gas molecules inside the second containment chamber decreases and their kinetic energy decreases, the pressure inside the second containment chamber decreases. At this time, by pumping air out of the second containment chamber, the amount of inert gas inside the second containment chamber is reduced, making the second containment chamber tend to be a vacuum. This reduces the overall thermal conductivity of the battery pack housing, better isolates the heat exchange between the battery pack and the outside world, reduces the heat loss of the battery pack, and thus significantly reduces the power consumption of the vehicle for heating, specifically resulting in a significant increase in driving range.

[0009] When the ambient temperature rises, the inert gas in the second containment chamber can self-regulate within a certain range according to the temperature-pressure change curve. When the ambient temperature rises significantly, the temperature of the inert gas in the second containment chamber also rises. At this time, the pressure on the inner wall of the heat management plate can be reduced by drawing gas out of the second containment chamber, thereby reducing the risk of seal failure.

[0010] In addition, when conditions such as bottom ball impact occur, changes in temperature and pressure within the second containment chamber can be used to determine whether the thermal management plate at the bottom of the battery pack is cracked or leaking, thereby assisting in determining the depth of intrusion and the condition of the battery pack.

[0011] In one alternative embodiment, the frame further has a second target surface, which is located on the side of the frame facing the first receiving compartment, and the second target surface intersects with the first target surface;

[0012] The first weld is formed at the contact point between the first plate and the second target surface;

[0013] The second weld is formed at the contact point between the second plate and the extended edge.

[0014] Beneficial effects: The frame and its extended edge together with the first plate and the second plate form a second receiving chamber. By forming a first weld at the contact position between the first plate and the second target surface, and forming a second weld at the contact position between the second plate and the extended edge, the sealing of the second receiving chamber is ensured, the leakage of inert gas in the second receiving chamber is avoided, and the thermal management performance of the thermal management plate is guaranteed.

[0015] In one optional embodiment, the thermal management plate further includes support ribs, which are disposed between the first plate and the second plate and extend along a first direction, and a plurality of support ribs are spaced apart along a second direction.

[0016] Beneficial effects: By setting support ribs between the first plate and the second plate, the thermal management plate's resistance to torsion is enhanced, avoiding deformation during the manufacturing process and thus reducing the manufacturing difficulty of the thermal management plate.

[0017] In one optional embodiment, a first cavity is formed between adjacent support ribs; the ends of the support ribs and the first plate along the first direction are spaced apart from the extension edge to form a second cavity, and the second cavities are all connected to the first cavity.

[0018] Beneficial effects: On the one hand, it ensures that inert gas can flow through the second cavity to each first cavity, avoiding dead zones in the thermal management board during the vacuuming process. On the other hand, the second cavity can provide installation space for pressure and temperature sensors without affecting the overall sealing of the second containment chamber.

[0019] In one alternative embodiment, the thermal management panel includes multiple insulation panels extending along a first direction, and the multiple insulation panels are spliced ​​together along a second direction to form the thermal management panel.

[0020] Beneficial effects: The thermal management board is made by splicing multiple insulation boards along the second direction, which is not only easy to process, but also easy to replace insulation boards that do not meet the yield standards during the process, which helps to reduce production costs.

[0021] In one alternative embodiment, the supporting ribs of adjacent insulation boards are abutted together along a second direction to form a third weld.

[0022] Beneficial effects: It not only ensures the welding yield of the insulation board, but also makes the overall structural strength of the heat management board higher by welding two adjacent and close-fitting support ribs.

[0023] In one alternative embodiment, the battery pack housing also includes a sensor; the sensor is located within the second cavity.

[0024] Beneficial effects: By installing sensors in the second cavity to monitor the pressure and temperature at various monitoring points within the second containment compartment, the impact of external temperature on the entire pack can be determined when using it under extreme temperature conditions by continuously receiving pressure and temperature signals from various points within the second containment compartment. When the monitored temperatures at each point rise synchronously, it can self-adjust according to the temperature-pressure change curve within a certain range. When the monitored temperatures at each point rise significantly, air can be drawn out from the second containment compartment to reduce the pressure on the inner wall of the thermal management plate, thereby reducing the risk of seal failure.

[0025] In one alternative embodiment, the battery pack housing further includes a gas regulating device connected to the second containment chamber and electrically connected to a sensor. The gas regulating device is adapted to regulate the amount of inert gas in the second containment chamber.

[0026] Beneficial effects: By setting up a gas regulating device electrically connected to the sensor, the amount of inert gas in the second containment chamber can be adjusted according to the changes in temperature and pressure at various monitoring points in the second containment chamber, thereby improving the adaptability of the battery pack under extreme temperature conditions.

[0027] In one alternative embodiment, the battery pack housing further includes a protective plate disposed on the side of the second plate away from the first plate in a third direction;

[0028] The protective plate has an anti-collision coating on the side facing away from the second plate.

[0029] Beneficial effects: By attaching the protective plate to the second plate, the thermal management plate is prevented from being damaged by impacts during operation, while enhancing the overall safety and stability of the entire battery pack; by applying an anti-collision coating to the protective plate, the anti-collision coating can further avoid external impacts, helping to improve the overall safety and stability of the battery pack.

[0030] Secondly, this utility model also provides a battery pack, including: a battery cell, and a battery pack housing as described above.

[0031] Beneficial effects: The second aspect of the battery pack, by adopting the battery pack housing of the first aspect, can provide a reliable heat insulation environment for the cell compartment in all directions, reduce the external heat exchange rate, reduce heat loss, and significantly reduce the power consumption of the whole vehicle for heating, which is specifically manifested in a significant increase in driving range; at the same time, the design of protective plates and anti-collision coatings can also avoid external impacts, and help improve the overall safety and stability of the battery pack. Attached Figure Description

[0032] 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.

[0033] Figure 1 This is an exploded view of a battery pack according to an embodiment of the present utility model;

[0034] Figure 2 This is a top view of a battery pack according to an embodiment of the present utility model;

[0035] Figure 3 This is a perspective view of a battery pack housing according to an embodiment of the present utility model;

[0036] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0037] Figure 5 This is a top view of a battery pack housing according to an embodiment of the present utility model;

[0038] Figure 6 for Figure 5 Sectional view of section BB;

[0039] Figure 7 for Figure 6 A magnified view of a portion of point C in the middle;

[0040] Figure 8 for Figure 6A magnified view of a portion of point D in the middle;

[0041] Figure 9 for Figure 8 A magnified view of a portion of point E in the middle;

[0042] Figure 10 This is a diagram showing the arrangement of pressure and temperature sensors on a thermal management board in a battery pack housing according to an embodiment of the present invention.

[0043] Figure 11 This is a top view of the thermal management plate of a battery pack housing according to an embodiment of the present utility model;

[0044] Figure 12 for Figure 11 A sectional view of section FF in the middle;

[0045] Figure 13 for Figure 12 A magnified view of a portion of point G in the middle;

[0046] Figure 14 for Figure 13 A magnified view of a portion of point H in the middle.

[0047] Explanation of reference numerals in the attached figures:

[0048] 10. Thermal management board; 100. Insulation board; 11. First plate; 12. Second plate; 13. Supporting rib; 131. Target rib;

[0049] 20. Border; 201. First target surface; 202. Second target surface; 21. Extension edge; 22. Side beam;

[0050] 31. First receiving chamber; 32. Second receiving chamber; 33. First cavity; 34. Second cavity;

[0051] 40. Battery cells;

[0052] 51. First weld; 52. Second weld; 53. Third weld;

[0053] 61. Pressure sensor; 62. Temperature sensor; 63. Gas regulating device;

[0054] 70. Protective plate; 71. Anti-collision coating;

[0055] X—first direction; Y—second direction; Z—third direction. Detailed Implementation

[0056] 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.

[0057] Among related technologies, some solutions use heating wires to provide heat energy. However, the battery pack housing located at the bottom of the vehicle constantly and rapidly loses heat, which not only increases the difficulty of passing experiments but also consumes a huge amount of internal power. Other solutions use insulation boards, which rely primarily on foam filling to isolate heat diffusion and reduce heat loss. However, this insulation effect is not ideal; under extremely harsh environments, it can easily exceed the heat loss warning line, causing battery overheating and even dangerous situations such as power outages.

[0058] The following is combined with Figures 1 to 14 The following describes embodiments of the present invention.

[0059] According to an embodiment of the present invention, in one aspect, a battery pack housing is provided, having a three-dimensional shape with intersecting first directions X, second directions Y, and third directions Z, comprising:

[0060] Thermal management plate 10, and frame 20; see also Figure 9 As shown, the frame 20 has a first target surface 201, which is located on the side of the frame 20 facing the thermal management plate 10 along the third direction Z. The first target surface 201 abuts against the thermal management plate 10 along the third direction Z.

[0061] Please see Figure 8 As shown, the thermal management board 10 includes a first plate 11 and a second plate 12 that are spaced apart from each other along the third direction Z. The first plate 11 abuts against the first target surface 201. The first plate 11 and the frame 20 together enclose a first receiving compartment 31, which is suitable for accommodating the battery cell 40. The second plate 12 is located on the side of the first plate 11 away from the first target surface 201 along the third direction Z.

[0062] See also Figure 8 As shown, the frame 20 also has an extension edge 21, which is formed by the first target surface 201 extending along the third direction Z towards the second plate 12; the extension edge 21 surrounds the circumferential edge of the second plate 12 and together with the first plate 11 and the second plate 12 to form a second receiving chamber 32, which is a sealed cavity.

[0063] The second containment chamber 32 is equipped with an inert gas, and the amount of the inert gas is adjustable.

[0064] The battery pack housing provided by this utility model first fills the second receiving chamber 32 with inert gas to a certain pressure value at room temperature and then seals it. When the ambient temperature drops, as the activity of the inert gas molecules inside the second receiving chamber 32 decreases and their kinetic energy decreases, the pressure inside the second receiving chamber 32 decreases. At this time, by evacuating air from the second receiving chamber 32 to reduce the amount of inert gas inside the second receiving chamber 32, the second receiving chamber 32 tends to be a vacuum, thereby reducing the overall thermal conductivity of the battery pack housing, better isolating the battery pack from heat exchange with the outside world, reducing heat loss of the battery pack, and thus significantly reducing the power consumption of the whole vehicle for heating, specifically manifested as a significant increase in driving range.

[0065] When the ambient temperature rises, the inert gas in the second containment chamber 32 can self-regulate within a certain range according to the temperature-pressure change curve. When the ambient temperature rises significantly, the temperature of the inert gas in the second containment chamber 32 also rises. At this time, the pressure on the inner wall of the heat management plate 10 can be reduced by drawing air out of the second containment chamber 32, thereby reducing the risk of seal failure.

[0066] In addition, when conditions such as bottom ball impact occur, the changes in temperature and pressure within the second containment chamber 32 can be used to determine whether the thermal management plate 10 at the bottom of the battery pack is cracked or leaking, thereby assisting in determining the depth of intrusion and the condition of the battery pack.

[0067] In some embodiments, see Figure 8 As shown, the frame 20 also has a second target surface 202, which is located on the side of the frame 20 facing the first receiving compartment 31, and the second target surface 202 intersects with the first target surface 201;

[0068] The first weld 51 is formed at the contact position between the first plate 11 and the second target surface 202;

[0069] Please combine them together Figure 9 As shown, the second weld 52 is formed at the contact position between the second plate 12 and the extended edge 21.

[0070] The frame 20 and its extended edge 21 together with the first plate 11 and the second plate 12 form the second receiving chamber 32. By forming a first weld 51 at the contact position between the first plate 11 and the second target surface 202, and forming a second weld 52 at the contact position between the second plate 12 and the extended edge 21, the sealing of the second receiving chamber 32 is ensured, the leakage of inert gas in the second receiving chamber 32 is avoided, and the thermal management performance of the thermal management plate 10 is guaranteed.

[0071] Furthermore, friction stir welding can be used to weld the first plate 11 to the second target surface 202 and the second plate 12 to the extension edge 21.

[0072] In some embodiments, see Figure 13 As shown, the thermal management plate 10 also includes a support rib 13, which is disposed between the first plate body 11 and the second plate body 12 and extends along the first direction X. A plurality of support ribs 13 are spaced apart along the second direction Y.

[0073] By providing support ribs 13 between the first plate 11 and the second plate 12, the thermal management plate 10 is enhanced to resist twisting, avoiding straightening during the manufacturing process and thus reducing the manufacturing difficulty of the thermal management plate 10.

[0074] Furthermore, the supporting rib 13 is integrally formed with the first plate 11 and the second plate 12.

[0075] In some embodiments, see Figure 13 As shown, a first cavity 33 is formed between adjacent support ribs 13;

[0076] Please see Figure 7 and Figure 9 As shown, the ends of the support rib 13 and the first plate 11 along the first direction X are spaced apart from the extension edge 21 to form a second cavity 34. The second cavity 34 extends along the second direction Y and is connected to the first cavity 33.

[0077] By setting a second cavity 34 that is connected to the first cavity 33, on the one hand, it is ensured that the inert gas can flow through the second cavity 34 to each first cavity 33, avoiding dead corners in the thermal management plate 10 during the vacuuming process. On the other hand, the second cavity 34 can provide installation space for the sensor, while not affecting the sealing of the entire second containment chamber 32.

[0078] Please see Figure 10 As shown, in the manufacturing process of the thermal management plate 10, a portion of the length of the supporting rib 13 and the first plate 11 corresponding to the mother profile can be cut off at both ends along the first direction X, so that the length of the supporting rib 13 and the first plate 11 along the first direction X is less than that of the second plate 12. Thus, after the battery pack box is manufactured, the supporting rib 13 and the first plate 11 are spaced apart from the extension edge 21 at both ends along the first direction X and respectively form two second cavities 34.

[0079] In some embodiments, see Figure 11 As shown, the thermal management board 10 includes multiple insulation boards 100 extending along a first direction X, and the multiple insulation boards 100 are spliced ​​together along a second direction Y to form the thermal management board 10.

[0080] Furthermore, each insulation board 100 is composed of a first board body 11, a second board body 12, and a supporting rib 13 between them.

[0081] Furthermore, multiple insulation boards 100 are welded together to form a thermal management board 10.

[0082] The thermal management plate 10 is formed by splicing multiple insulation plates 100 along the second direction Y, which is convenient for processing and easy to replace insulation plates 100 with substandard yield during the process, thus helping to reduce production costs.

[0083] In some embodiments, see Figure 14 As shown, the supporting ribs 13 of adjacent insulation boards 100 are attached to each other along the second direction Y and form a third weld 53.

[0084] Please see Figure 14 As shown, Figure 14 The target rib 131 for forming the third weld 53 is shown. The target rib 131 is provided on both sides of each insulation board 100 along the second direction Y, and the side of the target rib 131 away from the first cavity 33 along the second direction Y is flush with the outer edge of the insulation board 100.

[0085] By making the supporting ribs 13 of adjacent insulation boards 100 fit together along the second direction Y and forming a third weld 53, not only can the welding yield of the insulation board 100 be guaranteed, but also the overall structural strength of the heat management board 10 can be increased by welding the two adjacent and fitted supporting ribs 13.

[0086] Furthermore, friction stir welding can be used to weld between any two adjacent insulation boards 100.

[0087] In some embodiments, please combine Figure 7 , Figure 8 and Figure 10 As shown, the battery pack housing also includes a sensor, which is located in the second cavity 34.

[0088] By installing sensors in the second cavity 34 to monitor the pressure and temperature at each monitoring point in the second containment compartment 32, the impact of the external temperature on the entire pack can be determined by continuously receiving pressure and temperature signals from each point in the second containment compartment 32 when used under extreme temperature conditions. When the monitored temperatures at each point rise synchronously, the pack can self-adjust according to the temperature-pressure change curve within a certain range. When the monitored temperatures at each point rise significantly, air can be drawn out from the second containment compartment 32 to reduce the pressure on the inner wall of the thermal management plate 10, thereby reducing the risk of seal failure.

[0089] In addition, when conditions such as bottom ball impact occur, the changes in temperature and pressure at various monitoring points in the second containment chamber 32 can be used to determine whether the thermal management plate 10 at the bottom of the battery pack is cracked or leaking, thereby assisting in determining the depth of intrusion and the condition of the battery pack.

[0090] Furthermore, the sensor may include a pressure sensor 61 and a temperature sensor 62; multiple pressure sensors 61 and multiple temperature sensors 62 are respectively disposed in two second cavities 34. The pressure sensor 61 is adapted to monitor the pressure in the second receiving chamber 32 and generate a pressure signal, and the temperature sensor 62 is adapted to monitor the temperature in the second receiving chamber 32 and generate a temperature signal.

[0091] Furthermore, the pressure sensor 61 and the temperature sensor 62 can be electrically and / or communicatively connected to the vehicle's infotainment system.

[0092] In some embodiments, see Figure 6 As shown, the battery pack housing also includes a gas regulating device 63, which is connected to the second containment chamber 32. The control terminal of the gas regulating device 63 is electrically connected to the sensor. The gas regulating device 63 is adapted to regulate the amount of inert gas in the second containment chamber 32.

[0093] It should be noted that the gas regulating device 63 can be located outside the battery pack. The specific location of the gas regulating device 63 and the connection pipeline between the gas regulating device 63 and the second receiving compartment 32 can be adjusted according to the actual structure of the vehicle, and no specific limitation is made here.

[0094] By setting up a gas regulating device 63 electrically connected to the sensor, the amount of inert gas in the second containment chamber 32 can be adjusted according to the changes in temperature and pressure at various monitoring points in the second containment chamber 32, thereby improving the adaptability of the battery pack under extreme temperature conditions.

[0095] In some embodiments, see Figure 7 and Figure 8 As shown, the battery pack housing also includes a protective plate 70, which is located on the side of the second plate 12 away from the first plate 11 along the third direction Z.

[0096] The protective plate 70 has an anti-collision coating 71 on the side opposite to the second plate 12.

[0097] Furthermore, the frame 20 includes two side beams 22 extending along the second direction Y, and the protective plate 70 is fitted with the second plate 12 and the side beams 22.

[0098] The protective plate 70 is attached to the second plate 12 to prevent the thermal management plate 10 from being damaged by bumps during operation, thereby enhancing the overall safety and stability of the entire battery pack. The anti-collision coating 71 is provided on the protective plate 70 to further avoid external impacts and help improve the overall safety and stability of the battery pack.

[0099] Furthermore, the anti-collision coating 71 can be a PVC anti-collision coating.

[0100] According to an embodiment of the present invention, another aspect provides a battery pack, including: a battery cell 40, and a battery pack housing as described above, wherein the battery cell 40 is disposed in a first receiving compartment 31.

[0101] The battery pack provided in this embodiment, by adopting the above-mentioned battery pack housing, can provide a reliable heat insulation environment for the cell compartment in all directions, reduce the external heat exchange rate, reduce heat loss, and significantly reduce the power consumption of the whole vehicle for heating, which is specifically manifested in a significant increase in driving range; at the same time, the design of the protective plate 70 and the anti-collision coating 71 can also avoid external impacts, and help improve the overall safety and stability of the battery pack.

[0102] 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 housing having a three-dimensional shape with intersecting first (X), second (Y), and third (Z) directions, characterized in that, include: A thermal management plate (10) and a frame (20); the frame (20) has a first target surface (201), the first target surface (201) is located on the side of the frame (20) facing the thermal management plate (10) along the third direction (Z), and the first target surface (201) abuts against the thermal management plate (10) along the third direction (Z); The thermal management plate (10) includes a first plate (11) and a second plate (12) arranged at a distance from each other along the third direction (Z). The first plate (11) abuts against the first target surface (201). The first plate (11) and the frame (20) together enclose a first receiving compartment (31), which is suitable for accommodating a battery cell (40). The second plate (12) is located on the side of the first plate (11) away from the first target surface (201) along the third direction (Z). The frame (20) also has an extension edge (21), which is formed by the first target surface (201) extending along the third direction (Z) towards the second plate (12); the extension edge (21) surrounds the circumferential edge of the second plate (12) and together with the first plate (11) and the second plate (12) to form a second receiving chamber (32), which is a sealed cavity.

2. The battery pack housing according to claim 1, characterized in that, The frame (20) also has a second target surface (202), which is located on the side of the frame (20) facing the first receiving compartment (31), and the second target surface (202) intersects with the first target surface (201); The first weld (51) is formed at the contact position between the first plate (11) and the second target surface (202); The second plate (12) forms a second weld (52) at the contact position with the extended edge (21).

3. The battery pack housing according to claim 1, characterized in that, The heat management plate (10) further includes a support rib (13), which is disposed between the first plate body (11) and the second plate body (12) and extends along the first direction (X). A plurality of the support ribs (13) are spaced apart along the second direction (Y).

4. The battery pack housing according to claim 3, characterized in that, A first cavity (33) is formed between adjacent supporting ribs (13); The supporting rib (13) and the first plate (11) are spaced apart from the extension edge (21) along the first direction (X) to form a second cavity (34), which is connected to the first cavity (33).

5. The battery pack housing according to claim 4, characterized in that, The thermal management plate (10) includes multiple insulation boards (100) extending along the first direction (X), and the multiple insulation boards (100) are spliced ​​together along the second direction (Y) to form the thermal management plate (10).

6. The battery pack housing according to claim 5, characterized in that, The supporting ribs (13) of the adjacent insulation boards (100) are attached to each other along the second direction (Y) to form a third weld (53).

7. The battery pack housing according to claim 4, characterized in that, The battery pack housing also includes a sensor, which is located in the second cavity (34).

8. The battery pack housing according to claim 7, characterized in that, The battery pack housing also includes a gas regulating device (63), which is connected to the second containment chamber (32) and electrically connected to the sensor. The gas regulating device (63) is adapted to regulate the amount of inert gas in the second containment chamber (32).

9. The battery pack housing according to any one of claims 1-8, characterized in that, The battery pack housing also includes a protective plate (70), which is disposed on the side of the second plate (12) away from the first plate (11) along the third direction (Z); The protective plate (70) has an anti-collision coating (71) on the side opposite to the second plate (12).

10. A battery pack, characterized in that, include: The battery cell (40) and the battery pack housing as described in any one of claims 1 to 9 above.

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