Battery pack box body, battery pack and electric equipment

Abstract

The utility model provides a battery pack box body, a battery pack and electric equipment. The battery pack box body comprises a frame and a heat exchange plate which covers one side of the frame along a Z direction, an inlet allowing a heat exchange medium to enter is formed in one side of the heat exchange plate in the X direction, a water inlet flow channel communicated with the inlet is formed in the heat exchange plate, the frame comprises a front cross beam arranged close to the inlet, and the orthographic projection of the front cross beam on the heat exchange plate and the water inlet flow channel have an overlapping area; a heat insulation groove is formed in the position, at least corresponding to the overlapping area, of the front cross beam, a groove opening of the heat insulation groove is sunken in the side, away from the heat exchange plate, of the heat insulation groove in the Z direction, so that the position, at least corresponding to the overlapping area, of the front cross beam and the heat exchange plate are arranged at intervals, and heat exchange media do not exchange heat with the front cross beam when flowing through the overlapping area; therefore, heat exchange between the heat exchange plate and the front cross beam is avoided, the cooling performance and the heating performance of the battery pack are improved, the temperature difference of the battery cells is reduced, the temperature of the battery cells is uniform, and the requirement for temperature uniformity is met.

Description

Technical Field

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

[0002] A battery pack typically includes a frame, battery cells, and a liquid cooling plate. The liquid cooling plate is located at the bottom of the frame and encloses the frame to form a housing cavity, within which the battery cells are located. The liquid cooling plate has a water inlet channel; the frame has a water inlet communicating with the water inlet channel, and the frame includes a front crossbeam positioned near the water inlet and above the side of the water inlet channel closest to the water inlet.

[0003] In related technologies, when a liquid cooling plate heats or cools a battery pack, water enters the inlet channel through the inlet and then passes through the area where the front crossbeam is located. Since the bottom of the front crossbeam is in direct contact with the liquid cooling plate, and the front crossbeam is usually made of metal with a high thermal conductivity and fast heat transfer, heat exchange occurs between the front crossbeam and the liquid cooling plate. This not only reduces the cooling and heating performance of the battery pack, but also causes the temperature of the cells near the front crossbeam to be higher, resulting in localized higher temperatures and larger temperature differences in the cells, which fails to meet the requirements for temperature uniformity. Utility Model Content

[0004] In view of this, the present invention aims to provide a battery pack housing, a battery pack, and an electrical device to improve the problem of excessive temperature difference in battery cells to a certain extent and meet the requirements for temperature uniformity.

[0005] In a first aspect, the present invention provides a battery pack housing, the battery pack housing including a frame and a heat exchange plate covered on one side of the frame along the Z direction;

[0006] Along the X direction, an inlet for the heat exchange medium to enter is provided on one side of the heat exchange plate, and a water inlet channel communicating with the inlet is provided inside the heat exchange plate. The frame includes a front crossbeam, which is located close to the inlet, and the orthographic projection of the front crossbeam on the heat exchange plate overlaps with the water inlet channel.

[0007] The front crossbeam is provided with a heat insulation groove at least at a position corresponding to the overlapping area, and the groove opening of the heat insulation groove is recessed on the side away from the heat exchange plate along the Z direction, so that the front crossbeam is spaced apart from the heat exchange plate at least at a position corresponding to the overlapping area.

[0008] Optionally, along the Y direction, the opening size of the heat insulation groove is larger than the inner cavity size of the water inlet channel corresponding to the overlapping area.

[0009] Optionally, the shape of the heat insulation groove projected onto the heat exchange plate matches the shape of the water inlet channel corresponding to the overlapping area;

[0010] And / or, along the Z direction, the inner cavity size of the heat insulation groove gradually increases;

[0011] And / or, the number of water inlet channels is two, the two water inlet channels are spaced apart along the Y direction, and the number of heat insulation grooves is two, with one heat insulation groove corresponding to one water inlet channel.

[0012] Optionally, the heat exchange plate is provided with an outlet for the heat exchange medium to flow out, and the heat exchange plate is provided with a water outlet channel communicating with the outlet. The outlet and the inlet are located on the same side, and the water outlet channel is located between the two water inlet channels and communicates with the water inlet channels.

[0013] Optionally, along the X direction, the side of the front crossbeam opposite to the inlet is a battery compartment for accommodating battery cells, and a first heat insulation element is provided on the side of the front crossbeam facing the battery compartment.

[0014] Optionally, the first heat insulation member includes a main body and an extension connected to the main body at an angle; the first heat insulation member has an L-shaped structure, the main body is located between the front crossbeam and the battery cell, and the extension is located between the heat exchange plate and the battery cell;

[0015] Along the X direction, the dimension of the extension is not less than 1 / 3 of the dimension of the bottom surface of a single cell.

[0016] Optionally, the heat exchange plate includes multiple heat exchange zones, and the water inlet channel includes a main channel and branch channels disposed in each of the heat exchange zones. In two adjacent branch channels, the outlet of one branch channel is connected to the inlet of the other branch channel, and the inlet of each branch channel is connected to the main channel.

[0017] The battery pack housing also includes a plurality of second heat insulation components, which are disposed at least between the main road and the battery cell located above the heat exchange plate along the Z direction.

[0018] Optionally, along the Z direction, a third heat insulation element is provided on the side of the front crossbeam facing the heat exchange plate, and the third heat insulation element is located in the area of ​​the front crossbeam other than the heat insulation groove.

[0019] Secondly, this utility model provides a battery pack, including the battery pack housing as described above.

[0020] Thirdly, this utility model provides an electrical device, including the battery pack housing as described above, or including the battery pack as described above.

[0021] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0022] This utility model provides a battery pack housing, battery pack, and electrical equipment. By setting a frame and covering one side of the frame in the Z-direction with a heat exchange plate, and providing an inlet for the heat exchange medium to enter along one side of the heat exchange plate in the X-direction, the heat exchange plate contains a water inlet channel communicating with the inlet. The frame includes a front crossbeam positioned near the inlet; the orthogonal projection of the front crossbeam onto the heat exchange plate overlaps with the water inlet channel. The front crossbeam has a heat insulation groove at least at a position corresponding to the overlapping area, and the groove opening is recessed along the Z-direction away from the heat exchange plate. This arrangement ensures that the front crossbeam is spaced apart from the heat exchange plate at least at the position corresponding to the overlapping area. In this configuration, the heat insulation groove separates the bottom of the front crossbeam at the position corresponding to the overlapping area from the water inlet channel. In other words, the water inlet channel corresponding to the overlapping area is spaced apart from the front crossbeam, thus preventing the heat exchange plate from contacting the front crossbeam in this overlapping area, creating an air isolation layer. This air isolation layer has good performance. The thermal insulation performance ensures that the heat exchange medium will not exchange heat with the front crossbeam to a certain extent when flowing through the overlapping area. That is, no heat transfer will occur between the heat exchange medium and the front crossbeam, thus avoiding heat exchange between the heat exchange plate and the front crossbeam to a certain extent. This not only improves the cooling and heating performance of the battery pack, but also avoids the phenomenon of localized high temperature of the cells near the front crossbeam to a certain extent. This makes the cooling performance of the heat exchange plate on the cells more balanced, reduces the temperature difference of the cells, and makes the temperature of the cells more uniform, thus meeting the temperature uniformity requirements. Attached Figure Description

[0023] Figure 1 This is an isometric view of the battery pack housing according to an embodiment of the present invention;

[0024] Figure 2 This is a partial exploded view of the battery pack housing according to an embodiment of the present invention;

[0025] Figure 3 This is an axonometric view of the frame of the battery pack housing according to an embodiment of the present invention;

[0026] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0027] Figure 5 This is an exploded view of the front crossbeam, the first heat insulation component, and the third heat insulation component of the battery pack housing according to an embodiment of the present invention.

[0028] Figure 6 This is a partial structural schematic diagram of the top view of the battery pack housing according to an embodiment of the present invention;

[0029] Figure 7This is a schematic diagram of the front crossbeam of the battery pack housing according to an embodiment of the present invention, which shows the heat insulation groove;

[0030] Figure 8 This is an isometric view of the first heat insulation component of the battery pack housing according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the third heat insulation component of the battery pack housing according to an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram showing the fit between the battery pack housing and the battery cells in an embodiment of the present invention.

[0033] Figure 11 for Figure 10 Sectional view of AA;

[0034] Figure 12 for Figure 11 Enlarged view of point C in the middle;

[0035] Figure 13 for Figure 10 Sectional view of BB;

[0036] Figure 14 for Figure 13 Enlarged view at point D;

[0037] Figure 15 This is a schematic diagram of the water inlet and flow of the heat exchange plate of the battery pack housing according to an embodiment of the present invention.

[0038] Among them, 10. Battery pack housing; 1. Frame; 11. Front crossbeam; 2. Heat exchange plate; 3. Heat insulation groove; 4. Water inlet channel; 41. Water inlet branch; 5. Water outlet channel; 51. Water return branch; 6. First heat insulation component; 61. Main body; 62. Extension; 7. Second heat insulation component; 8. Third heat insulation component; 91. Liquid inlet; 92. Liquid outlet; 20. Battery cell. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] refer to Figures 1 to 15 As shown, this embodiment provides a battery pack housing 10, which includes a frame 1 and a heat exchange plate 2 covering one side of the frame 1 along the Z direction.

[0041] In some implementations, the heat exchange plate 2 is installed at the bottom of the frame 1. Of course, in other implementations, the heat exchange plate 2 can also be installed at the top of the frame 1.

[0042] The following embodiment is illustrated by taking the example of the heat exchange plate 2 being installed at the bottom of the frame 1.

[0043] In the specific connection, the heat exchange plate 2 can be fixed to the bottom of the frame 1 by means of welding or bolt connection.

[0044] The frame 1 and the heat exchange plate 2 enclose a cavity, and the battery cell 20 of the battery pack is installed in the cavity and makes heat exchange contact with the heat exchange plate 2. The heat exchange plate 2 has a load-bearing function for the battery cell 20 and can exchange heat with the battery cell 20, thereby heating or cooling the battery cell 20.

[0045] Specifically, along the X direction, an inlet (not shown) for the heat exchange medium is provided on one side of the heat exchange plate 2, and a water inlet channel 4 communicating with the inlet is provided inside the heat exchange plate 2. In actual use, the heat exchange medium enters the water inlet channel 4 inside the heat exchange plate 2 through the inlet, thereby exchanging heat with the battery cell 20. The frame 1 includes a front crossbeam 11, which is located near the inlet, and the orthogonal projection of the front crossbeam 11 on the heat exchange plate 2 overlaps with the water inlet channel 4. The front crossbeam 11 is provided with a heat insulation groove 3 at least at the position corresponding to the overlapping area, and the groove opening of the heat insulation groove 3 is recessed along the Z direction toward the side away from the heat exchange plate 2, and the groove opening of the heat insulation groove 3 faces at least toward the heat exchange plate 2, so that the front crossbeam 11 is spaced apart from the heat exchange plate 2 at least at the position corresponding to the overlapping area.

[0046] In other words, at least at the bottom of the front crossbeam 11, at a position opposite to the water inlet channel 4, an insulation groove 3 with an opening facing the heat exchange plate 2 is provided. The insulation groove 3 separates the bottom of the front crossbeam 11 from the heat exchange plate 2, so that the bottom of the front crossbeam 11 will not come into contact with the heat exchange plate 2.

[0047] By creating a heat insulation groove 3 at the bottom of the front crossbeam 11 opposite to the water inlet channel 4, and making the opening of the heat insulation groove 3 face the heat exchange plate 2, the bottom of the front crossbeam 11 opposite to the water inlet channel 4 is separated from the heat exchange plate, and the two do not contact each other. In this way, when the heat exchange medium in the water inlet channel 4 passes through the front crossbeam 11 opposite to the water inlet channel 4, no heat exchange occurs between the heat exchange medium and the front crossbeam 11. This setting not only improves the cooling and heating performance of the battery pack, but also avoids the phenomenon of local high temperature of the battery cell 20 near the front crossbeam 11 to a certain extent. This makes the cooling performance of the heat exchange plate 2 on the battery cell 20 more balanced, reduces the temperature difference of the battery cell 20, and makes the temperature of the battery cell 20 more uniform, thus meeting the temperature uniformity requirements.

[0048] Furthermore, at the bottom of the front crossbeam 11, opposite to the water inlet channel 4, a heat insulation groove 3 is spaced apart from the heat exchange plate 2. The heat insulation groove 3 contains air, thus forming an air isolation layer between the front crossbeam 11 and the water inlet channel 4 at their respective positions. Since air is a poor conductor of heat, the air isolation layer has good heat insulation performance. As the air isolation layer forms a heat insulation layer, when the heat exchange medium in the water inlet channel 4 flows through the position opposite to the front crossbeam 11, it further prevents the heat exchange medium from exchanging heat with the front crossbeam 11, thereby further improving the cooling and heating performance of the battery pack. It also further avoids the phenomenon of localized high temperature of the battery cell 20 near the front crossbeam 11, making the cooling performance of the heat exchange plate 2 on the battery cell 20 more balanced, further reducing the temperature difference of the battery cell 20, making the temperature of the battery cell 20 more uniform, and better meeting the temperature uniformity requirements.

[0049] The battery pack housing provided in this embodiment includes a frame 1 and a heat exchange plate 2 covering one side of the frame 1 in the Z direction. The heat exchange plate 2 has an inlet for the heat exchange medium to enter on one side in the X direction. The heat exchange plate 2 has a water inlet channel 4 communicating with the inlet. The frame 1 includes a front crossbeam 11, which is located near the inlet. The orthogonal projection of the front crossbeam 11 on the heat exchange plate 2 overlaps with the water inlet channel 4. The front crossbeam 11 is provided with a heat insulation groove 3 at least at the position corresponding to the overlapping area, and the groove opening of the heat insulation groove 3 is recessed on the side away from the heat exchange plate along the Z direction, so that the front crossbeam 11 is spaced apart from the heat exchange plate 2 at least at the position corresponding to the overlapping area. In this arrangement, the heat insulation groove 3 separates the position at the bottom of the front crossbeam 11 corresponding to the overlapping area from the water inlet channel 4. In other words, the water inlet channel 4 corresponding to the overlapping area is spaced apart from the front crossbeam 11, so that the heat exchange plate 2 does not contact the front crossbeam 11 in the overlapping area, and air is present, forming an air isolation layer. The air isolation layer has good performance. The heat insulation performance ensures that the heat exchange medium will not exchange heat with the front crossbeam 11 to a certain extent when flowing through the overlapping area. That is, no heat transfer will occur between the heat exchange medium and the front crossbeam 11, thereby avoiding heat exchange between the heat exchange plate 2 and the front crossbeam 11 to a certain extent. This not only improves the cooling and heating performance of the battery pack, but also avoids the phenomenon of localized high temperature of the battery cell 20 near the front crossbeam 11. This makes the cooling performance of the heat exchange plate 2 on the battery cell 20 more balanced, reduces the temperature difference of the battery cell 20, and makes the temperature of the battery cell 20 more uniform, thus meeting the temperature uniformity requirements.

[0050] refer to Figures 2 to 6 As shown, in some embodiments, along the Y direction, the opening size of the heat insulation groove 3 is larger than the inner cavity size of the water inlet channel 4 corresponding to the overlapping area. That is, along the length direction of the front crossbeam 11 (refer to...) Figure 2 In the Y direction, the opening size of the heat insulation groove 3 is larger than the inner cavity size of the water inlet channel 4 corresponding to the overlapping area.

[0051] In other words, along the length of the front crossbeam 11, the orthogonal projection of the heat insulation groove 3 onto the heat exchange plate 2 is larger than the inner cavity size of the water inlet channel 4 at the position opposite to the heat insulation groove 3. That is, at the bottom of the front crossbeam 11, at the position opposite to the water inlet channel 4, the water inlet channel 4 is located within the orthogonal projection area of ​​the heat insulation groove 3 onto the heat exchange plate 2. Thus, when the heat exchange medium passes through the position opposite to the front crossbeam 11, the heat exchange medium passes under the area where the heat insulation groove 3 is located, and the heat exchange medium does not come into contact with the front crossbeam 11 at all. The heat insulation performance between the heat exchange medium and the front crossbeam 11 is good, thereby further improving the cooling and heating performance of the battery pack. At the same time, it further avoids the phenomenon of local high temperature in the battery cell 20, resulting in good temperature uniformity.

[0052] In some embodiments, the shape of the heat insulation groove 3 projected onto the heat exchange plate 2 matches the shape of the water inlet channel 4 corresponding to the overlapping area. That is, at the position where the front crossbeam 11 is opposite to the water inlet channel 4, the shape of the heat insulation groove 3 matches the shape of the water inlet channel 4. In other words, the heat insulation groove 3 and the water inlet channel 4 are designed to mimic the shape at the position where they are opposite to the front crossbeam 11. With this arrangement, at the position where the front crossbeam 11 is opposite to the water inlet channel 4, the heat insulation groove 3 is located directly above the water inlet channel 4. The layout of the heat insulation groove 3 is more reasonable, and the heat insulation performance of the air isolation layer formed between the front crossbeam 11 and the water inlet channel 4 is better.

[0053] In some embodiments, the inner cavity size of the heat insulation groove 3 gradually increases along the Z direction, that is, along the direction from the heat exchange plate 2 to the front crossbeam 11. In other words, the inner cavity size of the heat insulation groove 3 gradually increases along the direction from bottom to top. That is, the heat insulation groove 3 is an inverted conical groove that is larger at the top and smaller at the bottom. The heat insulation groove 3 can accommodate more air. In this way, while ensuring that the front crossbeam 11 and the water inlet channel 4 are spaced apart and do not contact each other, the volume of the air isolation layer between the two is also increased, so that the heat insulation performance between the front crossbeam 11 and the water inlet channel 4 is better.

[0054] In some embodiments, reference Figures 2 to 6 , Figure 15 As shown, there are two water inlet channels 4, which are spaced apart along the Y direction. That is, the two water inlet channels 4 extend from the inlet in a direction away from each other. There are two heat insulation grooves 3, with one heat insulation groove 3 corresponding to one water inlet channel 4.

[0055] Typically, the heat exchange plate 2 is provided with two water inlet channels 4. The water inlet ends of the two water inlet channels 4 are connected to the inlet on the heat exchange plate 2, and the two water inlet channels 4 extend from the inlet in a direction away from each other. The orthographic projection of the front crossbeam 11 on the heat exchange plate 2 overlaps with the two water inlet channels 4. The heat exchange plate 2 has a good heat exchange effect on the battery pack.

[0056] In practice, heat insulation grooves 3 are provided at the bottom of the front crossbeam 11 at positions opposite to the two water inlet channels 4. The two heat insulation grooves 3 are spaced apart along the length of the front crossbeam 11, with one heat insulation groove 3 corresponding to one water inlet channel 4. That is, a heat insulation groove 3 is provided above each water inlet channel 4, so that the heat exchange medium in the two water inlet channels 4 will not exchange heat with the front crossbeam 11. This further avoids the phenomenon of local high temperature of the battery cell 20 on the side close to the front crossbeam 11, making the cooling performance of the heat exchange plate 2 on the battery cell 20 more balanced and the temperature uniformity better.

[0057] refer to Figure 2 and Figure 15As shown, in some embodiments, the heat exchange plate 2 is provided with an outlet for the heat exchange medium to flow out, and a water outlet channel 5 communicating with the outlet is provided inside the heat exchange plate 2. The end of the water outlet channel 5 away from the outlet is connected to the end of the water inlet channel 4 away from the inlet. The end of the water inlet channel 4 facing the inlet has an inlet branch 41, and the end of the water outlet channel 5 facing the outlet has a return water branch 51. The return water branch 51 is located on one side of the inlet branch 41, and the shape of the return water branch 51 is the same as the shape of the inlet branch 41.

[0058] In other words, the heat exchange plate 2 has a water outlet channel 5, the inlet end of which is connected to the outlet end of the inlet channel 4, and the outlet end of the water outlet channel 5 is connected to the outlet on the heat exchange plate 2. In actual use, the heat exchange medium enters the inlet channel 4 through the inlet on the heat exchange plate 2, and then exits through the outlet channel 5 and the outlet on the heat exchange plate in sequence, and the heat exchange medium exchanges heat with the battery cell 20.

[0059] In some implementations, the inlet channel 4 has an inlet branch 41 at its inlet-facing end; the outlet channel 5 has a return branch 51 at its outlet-facing end. The return branch 51 is located on one side of the inlet branch 41, and the return branch 51 and inlet branch 41 are designed to mimic their shapes. This allows the high temperature of the heat exchange medium in the inlet branch 41 to regulate the temperature with the low temperature of the heat exchange medium in the return branch 51. In other words, the low temperature of the return branch 51 neutralizes the high temperature of the inlet branch 41, thus reducing the high temperature of the inlet branch 41 in a timely manner. This further reduces the maximum operating temperature of the battery cell 20, thereby further reducing the temperature difference of the battery cell 20 and resulting in better temperature uniformity.

[0060] In some embodiments, reference Figure 15 As shown, there are two inlet channels 4, which extend from the inlet in a direction away from each other, and each inlet end of the two inlet channels 4 has an inlet branch 41. There are two outlet channels 5, whose inlet ends are respectively connected to the outlet ends of the two inlet channels 4, and whose outlet ends extend in a direction closer to each other to the outlet on the heat exchange plate 2, and are both connected to the outlet on the heat exchange plate 2. Both outlet channels 5 have return water branches 51 at their outlet ends. Each return water branch 51 corresponds to an inlet water branch 41. The corresponding return water branch is located on one side of the corresponding inlet water branch. The corresponding return water branch and the corresponding inlet water branch are designed in a contour. In this way, after the heat exchange medium enters the heat exchange plate 2 from the inlet, it flows to both sides along the two inlet water branches 41. After passing through the outlet channel 5, it converges and is discharged to the outlet along the two return water branches 51. That is, it is inlet at both ends and outlet in the middle. Compared with the scheme of inlet in the middle and outlet at both ends in the prior art, the heat exchange effect is better.

[0061] refer to Figures 2 to 6 , Figure 8 As shown, in some embodiments, along the X direction, the side of the front crossbeam 11 facing away from the entrance is a battery compartment for accommodating the battery cell 20, and the side of the front crossbeam 11 facing the battery compartment is provided with a first heat insulation member 6.

[0062] In other words, a first heat insulation component 6 is provided on the side of the front crossbeam 11 that contacts the battery cell 20. The first heat insulation component 6 has a high temperature isolation function, which prevents the front crossbeam 11 from contacting the battery cell 20, so that no heat exchange occurs between the front crossbeam 11 and the battery cell 20, thereby avoiding the occurrence of high temperature areas caused by heat transfer from the front crossbeam, and making the temperature of the battery cell 20 more uniform.

[0063] In practice, the first heat insulation element 6 can be, for example, a heat insulation sheet made of polycarbonate.

[0064] refer to Figure 8 , Figure 12 and Figure 14 As shown, in some embodiments, the first heat insulation member 6 includes a main body 61 and an extension 62 connected to the bottom end of the main body 61, the extension 62 intersecting the main body 61. The main body 61 is connected to the side of the front crossbeam 11 facing the battery compartment, the main body 61 is located between the front crossbeam 11 and the battery cell 20, the extension 62 extends toward the battery compartment and contacts the bottom surface of the battery cell 20, the extension 62 is located between the heat exchange plate 2 and the battery cell 20.

[0065] In other words, the first heat insulation component 6 includes a main body 61 and an extension 62. The main body 61 covers and is connected to the side of the front crossbeam 11 that contacts the battery cell 20. The extension 62 is connected to the bottom end of the main body 61 and extends into the battery compartment in a direction away from the main body 61. The first heat insulation component 6 is roughly L-shaped, consisting of the main body 61 and the extension 62. This not only provides heat insulation for the front crossbeam 11 and the battery cell 20 through the main body 61, but also meets the waterproofing requirements inside the battery pack through the extension 62. At the same time, it can also act as a sealant to prevent the thermal conductive adhesive from overflowing.

[0066] In some embodiments, along the X direction, i.e. along the width direction of the crossbeam, the dimension of the extension 62 is not less than 1 / 3 of the dimension of the bottom surface of a single cell 20, so that the first heat insulation member 6 provides heat insulation between the cell 20 and the front crossbeam 11, and also has good sealing performance.

[0067] refer to Figure 3 , Figure 10 , Figure 13As shown, in some embodiments, the heat exchange plate 2 includes multiple heat exchange zones, and the water inlet channel 4 includes a main channel and branch channels disposed in each heat exchange zone. In two adjacent branch channels, the outlet of one branch channel is connected to the inlet of the other branch channel, and the inlet of each branch channel is connected to the main channel. The battery pack housing 10 also includes multiple second heat insulation elements 7, which are disposed at least along the Z-direction between the main channel and the battery cell 20 located above the heat exchange plate 2.

[0068] In other words, a second heat insulation component 7 is installed between the main water inlet channel 4 and the battery cell 20. The second heat insulation component 7 isolates the main water inlet channel and the battery cell 20, thus providing heat insulation. The thermal conductivity of the second heat insulation component 7 is lower than that of the thermally conductive adhesive, which can reduce the heat transfer rate and further prevent high temperature phenomena. At the same time, it also has a limiting effect on the thermally conductive adhesive between the heat exchange plate 2 and the battery cell 20.

[0069] In practice, the second heat insulation element 7 can be, for example, a heat insulation strip made of polycarbonate.

[0070] The second heat insulation component 7 can be attached to the bottom surface of the battery cell, or it can be attached to the top of the main channel of the water inlet channel 4.

[0071] In some other implementations, the second heat insulation element 7 can be simultaneously bonded to the main channel above the battery cell 20 and the water inlet channel 4.

[0072] refer to Figures 4 to 6 , Figure 9 , Figure 14 As shown, in some embodiments, a third heat insulation element 8 is provided on the side of the front crossbeam 11 facing the heat exchange plate 2 along the Z direction. The third heat insulation element 8 is located in the area of ​​the front crossbeam 11 other than the heat insulation groove 3.

[0073] In other words, a third heat insulation component 8 is provided in the area at the bottom of the front crossbeam 11 other than the heat insulation groove 3. The third heat insulation component 8 separates the front crossbeam 11 from the battery cell 20 and plays a role in heat insulation.

[0074] The side of the front crossbeam 11 facing the entrance is usually the electrical compartment. The third heat insulation element 8 also has a sealing function between the front crossbeam 11 and the battery cell 20, sealing and isolating the battery compartment and the electrical compartment, thereby preventing leakage in the electrical compartment from affecting the battery compartment to a certain extent.

[0075] In practice, the third thermal insulation component 8 can be, for example, sealant, thermal insulation strip made of polycarbonate, etc.

[0076] refer to Figures 1 to 15 As shown, this embodiment also provides a battery pack, which includes a battery pack housing 10.

[0077] The battery pack housing 10 in this embodiment has the same structure and implementation principle as the battery pack housing 10 provided in the above embodiments, and can bring the same or similar technical effects. It will not be described in detail here, but can be referred to the description of the above embodiments.

[0078] This embodiment also provides an electrical device, which includes a battery pack housing 10, or includes a battery pack.

[0079] The battery pack housing 10 in this embodiment has the same structure and implementation principle as the battery pack housing 10 provided in the above embodiments, and can bring the same or similar technical effects. It will not be described in detail here, but can be referred to the description of the above embodiments.

[0080] The battery pack in this embodiment has the same structure and implementation principle as the battery pack provided in the above embodiments, and can bring the same or similar technical effects. It will not be described in detail here, but can be referred to the description of the above embodiments.

[0081] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, the terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0082] In this document, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery pack case characterized by, The battery pack housing (10) includes a frame (1) and a heat exchange plate (2) covering one side of the frame (1) along the Z direction; Along the X direction, an inlet for the heat exchange medium to enter is provided on one side of the heat exchange plate (2), and a water inlet channel (4) communicating with the inlet is provided inside the heat exchange plate (2). The frame (1) includes a front crossbeam (11), which is located close to the inlet, and the orthographic projection of the front crossbeam (11) on the heat exchange plate (2) overlaps with the water inlet channel (4). The front crossbeam (11) is provided with a heat insulation groove (3) at least at the position corresponding to the overlapping area, and the groove opening of the heat insulation groove (3) is recessed on the side away from the heat exchange plate (2) along the Z direction, so that the front crossbeam (11) is spaced apart from the heat exchange plate (2) at least at the position corresponding to the overlapping area.

2. The battery pack enclosure of claim 1, wherein, Along the Y direction, the opening size of the heat insulation groove (3) is larger than the inner cavity size of the water inlet channel (4) corresponding to the overlapping area.

3. The battery pack enclosure of claim 1, wherein, The shape of the heat insulation groove (3) projected onto the heat exchange plate (2) matches the shape of the water inlet channel (4) corresponding to the overlapping area; And / or, along the Z direction, the inner cavity size of the heat insulation groove (3) gradually increases; And / or, the number of water inlet channels (4) is two, the two water inlet channels (4) are spaced apart along the Y direction, the number of heat insulation grooves (3) is two, and one heat insulation groove (3) corresponds to one water inlet channel (4).

4. The battery pack housing according to claim 3, characterized in that, The heat exchange plate (2) is provided with an outlet for the heat exchange medium to flow out. The heat exchange plate (2) is provided with a water outlet channel (5) that communicates with the outlet. The outlet and the inlet are located on the same side. The water outlet channel (5) is located between the two water inlet channels (4) and communicates with the water inlet channels (4).

5. The battery pack enclosure of any one of claims 1 to 3, wherein, Along the X direction, the side of the front crossbeam (11) facing away from the entrance is a battery compartment for accommodating the battery cell (20), and the side of the front crossbeam (11) facing the battery compartment is provided with a first heat insulation member (6).

6. The battery pack enclosure of claim 5, wherein, The first heat insulation member (6) includes a main body (61) and an extension (62) connected to the main body (61) at an angle; the first heat insulation member has an L-shaped structure, the main body (61) is located between the front crossbeam (11) and the battery cell (20), and the extension (62) is located between the heat exchange plate (2) and the battery cell (20); Along the X direction, the size of the extension (62) is not less than 1 / 3 of the size of the bottom surface of a single cell (20).

7. The battery pack enclosure of any one of claims 1 to 3, wherein, The heat exchange plate (2) includes multiple heat exchange zones, and the water inlet channel (4) includes a main channel and branch channels arranged in each of the heat exchange zones. For two adjacent branch channels, the outlet of one branch channel is connected to the inlet of the other branch channel, and the inlet of each branch channel is connected to the main channel. The battery pack housing (10) also includes a plurality of second heat insulation components (7), which are disposed at least between the main road and the battery cell (20) located above the heat exchange plate (2) along the Z direction.

8. The battery pack enclosure of any one of claims 1 to 3, wherein, Along the Z direction, a third heat insulation element (8) is provided on the side of the front crossbeam (11) facing the heat exchange plate (2), and the third heat insulation element (8) is located in the area of ​​the front crossbeam (11) other than the heat insulation groove (3).

9. A battery pack, characterized by, Includes the battery pack housing (10) as described in any one of claims 1 to 8.

10. An electric device, characterized by It includes the battery pack housing (10) as described in any one of claims 1 to 8, or the battery pack as described in claim 9.

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