Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, and the battery pack provided by the utility model comprises a first box body, a second box body and a third box body, the battery cell module is arranged in the first accommodating cavity; the second box body is provided with a second accommodating cavity; the electrical module comprises a first electrical module and a second electrical module which are connected with each other, the second electrical module is arranged in the second accommodating cavity, and the first electrical module is arranged in the first accommodating cavity and is connected with the battery cell module; the first box body is provided with a first cooling plate, and the first cooling plate is arranged in the first accommodating cavity and is connected to one side, far away from the second box body, of the battery cell module; the orthographic projection of the first electrical module in the third direction is at least partially located on the first cooling plate; the second box body is provided with a second cooling plate, and the second cooling plate is connected to the side, in the third direction, of the first electrical module. According to the battery pack provided by the utility model, more battery cell accommodating spaces can be reserved, and meanwhile, the heat dissipation of the battery cell module and the electrical module is ensured.

Description

Technical Field

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

[0002] Battery packs provide stable, high-energy-density DC power for electric vehicles, energy storage systems, and portable electronic devices. Battery pack design is crucial for achieving efficient, safe, and economical battery use.

[0003] The capacity of a battery pack is limited by the number of battery cells. In addition to the battery cell modules, the battery pack also has a battery control system. The battery control system is located in the same space as the battery cells. The battery cell modules and the battery control system generate heat during operation, which needs to be dissipated in a timely and effective manner to improve their performance and service life.

[0004] Since the space available for placing battery packs on a vehicle body is limited by the size of the vehicle body, the area available for placing battery cells is also limited. Therefore, how to arrange as many battery cell modules as possible within a limited space and ensure heat dissipation for the battery cell modules and electrical modules has always been a concern in the industry. Utility Model Content

[0005] In view of this, the present invention provides a battery pack and electrical equipment to solve the problem of how to arrange as many battery cell modules as possible in a limited space, while ensuring heat dissipation of the battery cell modules and electrical modules.

[0006] In a first aspect, this utility model provides a battery pack having intersecting first, second, and third directions, comprising:

[0007] The first housing has a first receiving cavity;

[0008] The battery cell module is located within the first receiving cavity;

[0009] The second housing is connected to the first housing on one side along a third direction; the second housing has a second receiving cavity.

[0010] An electrical module includes a first electrical module and a second electrical module that are interconnected. The second electrical module is located in a second receiving cavity, and the first electrical module is located in the first receiving cavity and connected to the battery cell module.

[0011] The first housing has a first cooling plate, which is disposed in the first receiving cavity and connected to the side of the battery cell module away from the second housing. The first cooling plate is adapted to cool the battery cell module. The orthographic projection of the first electrical module along a third direction is at least partially located on the first cooling plate.

[0012] The second enclosure has a second cooling plate, which is connected to the third-direction side of the first electrical module and is located between the second electrical module and the first enclosure; the second cooling plate is adapted to cool the second electrical module.

[0013] Beneficial Effects: The battery pack provided by this utility model independently arranges the second housing and the first housing in a Z-direction, with the cell module built into the first receiving cavity and the electrical module divided into two modules and built into the first and second receiving cavities respectively. This reduces the proportion of space occupied by the electrical module in the cell receiving space, making more efficient use of the cell receiving space in the first receiving cavity and leaving more space for the cells. The first housing cools the cell module and the first electrical module through the first cooling plate. The second cooling plate is independently set up with the first cooling plate for easy individual control. By setting the second cooling plate separately to cool and dissipate heat from the second electrical module, the cooling effect of the electrical module is improved, achieving independent liquid cooling of the upper electrical area of ​​the battery pack. This allows for the arrangement of more individual cells in a limited space, while ensuring heat dissipation of the cell module and the electrical module, thus ensuring the normal operation of the battery pack.

[0014] In one optional embodiment, the second cooling plate includes a second channel plate body and a second channel cover plate that are attached to each other. The second channel plate body and the second channel cover plate are stacked in a third direction, and the second channel cover plate is located between the second electrical module and the second channel plate body. A portion of the second channel plate body is recessed in a direction away from the second electrical module to form a second flow channel groove. The second channel cover plate is adapted to enclose the second flow channel groove together to form a second cooling flow channel.

[0015] Beneficial effects: The second channel cover is sealed to the second channel plate body along the third direction Z, so that the second channel cover and the second channel plate body together enclose and form a second cooling channel. The second cooling channel is suitable for the flow of cooling medium. The second cooling channel and the first cooling channel are set independently and each adopts two independent cooling systems, which are easy to control separately, thereby ensuring their respective cooling effects. The second channel cover is bonded to the second electrical module along the third direction Z, away from the second channel plate body, to fix the second cooling plate and the second electrical module.

[0016] In one optional embodiment, the second housing is provided with a second inlet pipe and a second outlet pipe;

[0017] The second channel cover plate has an inlet and an outlet on the side facing away from the second channel plate body. The inlet and outlet are spaced apart and both are connected to the second cooling channel. The inlet is connected to the second inlet pipe and the outlet is connected to the second outlet pipe.

[0018] Beneficial effects: By separately setting up a second liquid inlet pipe connected to the liquid inlet of the second cooling plate, and separately setting up a second liquid outlet pipe connected to the liquid outlet of the second cooling plate, the water inlet and outlet in the second cooling channel are more uniform, which is conducive to improving the cooling effect of the second cooling plate on the second electrical module.

[0019] In one optional embodiment, the first cooling plate has a first cooling channel; the first housing is provided with a first liquid inlet pipe and a first liquid outlet pipe, both of which are connected to the first cooling channel.

[0020] The first liquid inlet pipe and the first liquid outlet pipe are located on one side of the battery pack along the second direction, and the second liquid inlet pipe and the second liquid outlet pipe are located on the other side of the battery pack along the second direction.

[0021] Beneficial effects: On the one hand, it enables the cooling medium to form a more uniform flow path within the battery pack, avoiding excessive concentration of the cooling medium in a certain local area within the battery pack, thereby improving the overall cooling efficiency and ensuring that all areas of the battery pack can be effectively cooled. On the other hand, for example, when the first inlet pipe or the first outlet pipe fails, the second inlet pipe and the second outlet pipe can still work normally, and the first inlet pipe or the first outlet pipe can be maintained separately, which not only ensures the safety of the system, but also helps to reduce maintenance time and costs.

[0022] In one optional implementation, the second electrical module includes a first component and a second component, both of which are located on the same side of the second channel cover away from the battery cell module, and the heating power of the first component is greater than that of the second component.

[0023] The second cooling channel has one channel, and the second cooling channel has a medium flow direction from the liquid inlet to the liquid outlet; along the medium flow direction, the first component is located upstream of the second component.

[0024] Beneficial effects: By arranging the high-heat-generating components in the second electrical module at the end of the second cooling channel near the liquid inlet along its flow direction, and arranging the low-heat-generating components at the end of the second cooling channel near the liquid outlet along its flow direction, the high-heat-generating components can achieve better cooling, thus optimizing the cooling and heat dissipation path of the entire second electrical module and improving the overall cooling and heat dissipation efficiency.

[0025] In one alternative embodiment, the second electrical module includes a base and an adapter disposed within the base, the base being connected to the side of the second cooling plate opposite to the first housing.

[0026] The base has a through hole extending through the base in a third direction. The through hole is suitable for installing an adapter, and the adapter is at least partially exposed on the side of the base facing the second channel cover.

[0027] A second adhesive layer is provided between the adapter and the second channel cover plate, which is suitable for bonding the adapter and the second channel cover plate.

[0028] Beneficial effects: At least a portion of the adapter extends from the through hole on the base to the side of the base facing the second cooling plate in the third direction Z, and the adapter is bonded to the second channel cover plate by a second adhesive layer made of thermally conductive material, thereby improving the heat conduction efficiency between the adapter and the second channel cover plate, and thus enhancing the cooling effect of the second cooling plate on the electrical module.

[0029] In one alternative embodiment, a third adhesive layer is provided between the base and the second channel cover plate. The third adhesive layer is made of a thermally conductive material and is suitable for bonding the base and the second channel cover plate.

[0030] Beneficial effects: By setting a third adhesive layer between the base and the second channel cover, the base is directly bonded to the second channel cover along the third direction Z towards the second cooling plate. This not only ensures the connection strength between the second electrical module and the second cooling plate, but also further enhances the cooling effect on the second electrical module by cooling the base.

[0031] In one alternative embodiment, an insulating sheet is provided on the side of the second channel cover facing the base, the insulating sheet being adapted to insulate the second cooling plate from the second electrical module.

[0032] Beneficial effects: By setting an insulating sheet between the second channel cover and the base, the second electrical module and the second cooling plate are electrically isolated, preventing direct contact between the second electrical module and the second cooling plate, avoiding short circuits and arc discharges between the second electrical module and the second cooling plate, and thus ensuring the electrical safety of the battery pack.

[0033] In one optional embodiment, the second housing includes a shell and a second cover. The shell has openings on both sides opposite each other in a third direction. The second cover covers one of the openings, and the second cooling plate covers the other opening. The end of the second cooling plate away from the shell is connected to the first housing. The second cover, the shell, and the second cooling plate together form a second receiving cavity.

[0034] The second cover is detachably connected to the outer shell.

[0035] Beneficial effects: By providing openings on both sides of the housing along the third direction Z, covering one opening with a second cover and covering the other opening with a second cooling plate, and by detachably connecting the second cover to the housing, it is possible to maintain the second electrical module inside the second receiving cavity through the openings. After maintenance, the openings are sealed with the second cover to achieve a seal on the second receiving cavity, thereby preventing foreign objects from entering the second receiving cavity and damaging the second electrical module.

[0036] Secondly, this utility model also provides an electrical device, including: a device body, and a battery pack as described above.

[0037] Beneficial effects: The second type of electrical equipment, by adopting the battery pack of the first aspect, divides the electrical module into two modules and installs them in the first and second accommodating cavities respectively. This reduces the proportion of space occupied by the electrical module in the cell accommodating space, making more efficient use of the cell accommodating space in the first accommodating cavity, thus leaving more space for the cells. The first housing cools the cell module and the first electrical module through the first cooling plate. The second cooling plate is set independently from the first cooling plate, which is convenient for individual control. By setting the second cooling plate separately to cool and dissipate heat from the second electrical module, the cooling effect of the electrical module is improved, and independent liquid cooling of the upper electrical area of ​​the battery pack is achieved. This allows for the arrangement of more individual cells in a limited space, while ensuring heat dissipation of the cell module and the electrical module, and ensuring the normal operation of the battery pack. Attached Figure Description

[0038] 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.

[0039] Figure 1 This is a front view of a battery pack according to an embodiment of the present utility model;

[0040] Figure 2 for Figure 1 Sectional view of section AA;

[0041] Figure 3 for Figure 2 A magnified view of a portion of point B in the middle;

[0042] Figure 4 for Figure 3 A cross-sectional view of the main body of the first channel plate;

[0043] Figure 5 for Figure 2 A magnified view of a portion of point C in the middle;

[0044] Figure 6 for Figure 5 A cross-sectional view of the main body of the second channel plate;

[0045] Figure 7 This is an exploded view of the second cooling plate of a battery pack according to an embodiment of the present invention;

[0046] Figure 8 This is a schematic diagram of the cooling cycle principle of the second cooling plate of a battery pack according to an embodiment of the present invention;

[0047] Figure 9 This is an exploded view of the base and adapter of a battery pack according to an embodiment of the present utility model;

[0048] Figure 10 This is an exploded view of a battery pack cell module and a second cooling plate according to an embodiment of the present invention.

[0049] Figure 11 This is an exploded view of the casing and the second cover of a battery pack according to an embodiment of the present invention;

[0050] Figure 12 This is a schematic diagram showing the relative positions of the first liquid inlet pipe and the first liquid outlet pipe, and the second liquid inlet pipe and the second liquid outlet pipe of a battery pack according to an embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] 10. First housing; 100. First receiving cavity; 11. First cooling plate; 110. First cooling channel; 111. First channel plate body; 1110. First channel groove; 112. First channel cover; 113. First liquid inlet pipe; 114. First liquid outlet pipe; 12. Side beam; 13. First cover;

[0053] 20. Second housing; 200. Second receiving cavity; 21. Second cooling plate; 210. Second cooling channel; 211. Second channel plate body; 2110. Second channel groove; 212. Second channel cover plate; 2121. Liquid inlet; 2122. Liquid outlet; 213. Second liquid inlet pipe; 214. Second liquid outlet pipe; 215. Insulating sheet; 22. Housing; 221. Opening; 23. Second cover;

[0054] 30. Battery cell module;

[0055] 40. Electrical module; 401. First component; 402. Second component; 41. First electrical module; 42. Second electrical module; 421. Base; 4211. Through hole; 422. Adapter;

[0056] 51. First adhesive layer; 52. Second adhesive layer; 53. Third adhesive layer;

[0057] X—first direction; Y—second direction; Z—third direction. Detailed Implementation

[0058] 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.

[0059] The following is combined Figures 1 to 12 The following describes embodiments of the present invention.

[0060] According to an embodiment of the present invention, in one aspect, a battery pack is provided, having intersecting first directions X, second directions Y, and a third direction Z, comprising:

[0061] The first housing 10 has a first receiving cavity 100;

[0062] The battery cell module 30 is disposed within the first receiving cavity 100;

[0063] The second housing 20 is connected to the first housing 10 on one side along the third direction Z; the second housing 20 has a second receiving cavity 200 inside;

[0064] Electrical module 40 includes a first electrical module 41 and a second electrical module 42 that are interconnected. The second electrical module 42 is disposed in the second receiving cavity 200, and the first electrical module 41 is disposed in the first receiving cavity 100 and connected to the battery cell module 30.

[0065] The first housing 10 has a first cooling plate 11, which is disposed in the first receiving cavity 100 and connected to the side of the battery cell module 30 away from the second housing 20. The first cooling plate 11 is adapted to cool the battery cell module 30. The first electrical module 41 is at least partially located on the first cooling plate 11 along the third direction Z, thereby cooling the first electrical module 41 through the first cooling plate 11.

[0066] The second housing 20 has a second cooling plate 21, which is connected to the first electrical module 41 on one side along the third direction Z and is located between the second electrical module 42 and the first housing 10; the second cooling plate 21 is adapted to cool the second electrical module 42.

[0067] It should be noted that the battery module 30 includes multiple individual battery cells, which are arranged in the first receiving cavity 100 along the first direction X and the second direction Y.

[0068] The battery pack provided by this utility model independently arranges the second housing 20 and the first housing 10 in a Z-direction, and houses the cell module 30 inside the first receiving cavity 100. The electrical module 40 is divided into two modules and housed in the first receiving cavity 100 and the second receiving cavity 200 respectively. This reduces the proportion of the electrical module 40 in the cell receiving space, making more efficient use of the cell receiving space in the first receiving cavity 100 and leaving more space for the cells. The first housing 10 cools the cell module 30 and the first electrical module 41 through the first cooling plate 11. The second cooling plate 21 is independently arranged from the first cooling plate 11 for easy individual control. The second cooling plate 21 is used to cool and dissipate heat from the second electrical module 42, thereby improving the cooling effect of the electrical module 40 and achieving independent liquid cooling of the upper electrical area of ​​the battery pack. This allows for the arrangement of more individual cells in a limited space while ensuring heat dissipation for the cell module 30 and the electrical module 40, thus ensuring the normal operation of the battery pack.

[0069] Further, please see Figure 3 As shown, the first cooling plate 11 includes a first channel plate body 111 and a first channel cover plate 112, which should be combined together. Figure 4 As shown, the first channel plate body 111 is recessed along the third direction Z towards the battery cell module 30 to form a first flow channel groove 1110. The first channel cover plate 112 is disposed on the first channel plate body 111 along the third direction Z towards the battery cell module 30. The first channel cover plate 112 is adapted to cover the first flow channel groove 1110. The first channel cover plate 112 is adapted to form a first cooling flow channel 110 together with the first channel plate body 111.

[0070] A first adhesive layer 51 is provided between the first channel cover plate 112 and the battery cell module 30. The first adhesive layer 51 is made of thermally conductive material and is suitable for bonding the first channel cover plate 112 and the battery cell module 30.

[0071] The first channel cover plate 112 is sealed to the first channel plate body 111 along the third direction Z, so that the first channel cover plate 112 and the first channel plate body 111 together form a first cooling channel 110. The first cooling channel 110 is suitable for the flow of cooling medium. The first channel cover plate 112 is bonded to the cell module 30 along the third direction Z by a first adhesive layer 51. The first adhesive layer 51 is made of thermally conductive material, which not only enhances the mode of the entire battery pack, but also improves the heat transfer efficiency between the first cooling plate 11 and the cell module 30, further enhancing the cooling effect of the cell module 30.

[0072] In some embodiments, see Figure 5 As shown, the second cooling plate 21 includes a second channel plate body 211 and a second channel cover plate 212 that are attached to each other. The second channel plate body 211 and the second channel cover plate 212 are stacked in the third direction Z, and the second channel cover plate 212 is located between the second electrical module 42 and the second channel plate body 211.

[0073] Please combine them together Figure 6 As shown, a portion of the second channel plate body 211 is recessed in the direction away from the second electrical module 42 to form a second flow channel groove 2110, and the second channel cover plate 212 is adapted to enclose the second flow channel groove 2110 together to form a second cooling flow channel 210.

[0074] In this embodiment, the second channel cover plate 212 is sealed to the second channel plate body 211 along the third direction Z, so that the second channel cover plate 212 and the second channel plate body 211 together form a second cooling channel 210. The second cooling channel 210 is suitable for the flow of cooling medium. The second cooling channel 210 and the first cooling channel 110 are set independently and each adopts two independent cooling systems, which are convenient for individual control and thus ensure their respective cooling effects. The second channel cover plate 212 is bonded to the second electrical module 42 along the third direction Z, away from the second channel plate body 211, to fix the second cooling plate 21 and the second electrical module 42.

[0075] In some embodiments, see Figure 7 As shown, the second housing 20 is provided with a second inlet pipe 213 and a second outlet pipe 214;

[0076] The second channel cover plate 212 has an inlet 2121 and an outlet 2122 on the side opposite to the second channel plate body 211. The inlet 2121 and the outlet 2122 are spaced apart and both are connected to the second cooling channel 210. The inlet 2121 is connected to the second inlet pipe 213 and the outlet 2122 is connected to the second outlet pipe 214.

[0077] In this embodiment, by separately setting a second liquid inlet pipe 213 connected to the liquid inlet 2121 of the second cooling plate 21, and separately setting a second liquid outlet pipe 214 connected to the liquid outlet 2122 of the second cooling plate 21, the water inlet and outlet in the second cooling channel 210 are made more uniform, which is beneficial to improving the cooling effect of the second cooling plate 21 on the second electrical module 42.

[0078] In some embodiments, see Figure 3 As shown, the first cooling plate 11 has a first cooling channel 110; please refer to it together. Figure 12 As shown, the first housing 10 is provided with a first liquid inlet pipe 113 and a first liquid outlet pipe 114, both of which are connected to the first cooling channel 110.

[0079] The first liquid inlet pipe 113 and the first liquid outlet pipe 114 are disposed on one side of the battery pack along the second direction Y, and the second liquid inlet pipe 213 and the second liquid outlet pipe 214 are disposed on the other side of the battery pack along the second direction Y.

[0080] In this embodiment, by placing the first liquid inlet pipe 113 and the first liquid outlet pipe 114 on one side of the battery pack along the second direction Y, and placing the second liquid inlet pipe 213 and the second liquid outlet pipe 214 on the other side of the battery pack along the second direction Y, on the one hand, the cooling medium forms a more uniform flow path within the battery pack, avoiding excessive concentration of the cooling medium flow in a certain local area within the battery pack, thereby improving the overall cooling efficiency and ensuring that all areas of the battery pack are effectively cooled. On the other hand, for example, when the first liquid inlet pipe 113 or the first liquid outlet pipe 114 malfunctions, the second liquid inlet pipe 213 and the second liquid outlet pipe 214 can still work normally, and the first liquid inlet pipe 113 or the first liquid outlet pipe 114 can be maintained separately, which not only ensures the safety of the system, but also helps to reduce maintenance time and costs.

[0081] In some embodiments, see Figure 8 As shown, the second electrical module 42 includes a first component 401 and a second component 402. The first component 401 and the second component 402 are both located on the same side of the second channel cover plate 212 away from the battery cell module 30. The heating power of the first component 401 is greater than the heating power of the second component 402.

[0082] There is one second cooling channel 210, and the second cooling channel 210 has a medium flow direction from the liquid inlet 2121 to the liquid outlet 2122; along the medium flow direction, the first component 401 is disposed upstream of the second component 402.

[0083] It should be noted that the first component 401 does not refer to a specific component, but rather to one or more components in the electrical module 40 that have a large heat dissipation power. For example, for a resistive element, its heat dissipation power can be calculated using the following formula: P = I 2 ×R or P = V 2 / R, where P represents the heat dissipation power, I represents the current through the resistor, V represents the voltage across the resistor, and R represents the resistance value; for transistors, the heat dissipation power mainly comes from conduction losses and switching losses; for power management chips, the heat dissipation power equals the input voltage multiplied by the input current minus the output voltage multiplied by the output current; for transformers and inductors, the heat dissipation power mainly comes from copper losses and iron losses. The specific calculation method can be selected according to the type of component and operating conditions, and will not be elaborated here.

[0084] By arranging the high-heat-generating components in the second electrical module 42 at one end of the second cooling channel 210 along its flow direction near the liquid inlet 2121, and arranging the low-heat-generating components at one end of the second cooling channel 210 along its flow direction near the liquid outlet 2122, the high-heat-generating components can achieve better cooling, thus optimizing the cooling and heat dissipation path of the entire second electrical module 42 and improving the overall cooling and heat dissipation efficiency.

[0085] In some embodiments, see Figure 10 As shown, the second electrical module 42 includes a base 421 and an adapter 422 disposed in the base 421. The base 421 is connected to the side of the second cooling plate 21 away from the first housing 10.

[0086] Please combine them together Figure 9 As shown, the base 421 has a through hole 4211 extending through the base 421 in a third direction Z. The through hole 4211 is suitable for installing the adapter 422, and the adapter 422 is at least partially exposed on the side of the base 421 facing the second channel cover plate 212.

[0087] A second adhesive layer 52 is provided between the adapter 422 and the second channel cover 212, and the second adhesive layer 52 is suitable for bonding the adapter 422 and the second channel cover 212.

[0088] It should be noted that the adapter 422 can be a copper busbar. Copper busbar is a material with excellent electrical and thermal conductivity. By connecting the copper busbar with electrical components such as contactors and fuses, current can be effectively conducted. On the other hand, the copper busbar can provide mechanical support for each electrical component. Furthermore, the copper busbar can help dissipate the heat generated at the electrical connection point, thereby reducing the local temperature of the electrical module 40 and improving the reliability and safety of the system.

[0089] Furthermore, the second adhesive layer 52 is made of a thermally conductive material.

[0090] In this embodiment, at least a portion of the adapter 422 extends from the through hole 4211 on the base 421 to the side of the base 421 facing the second cooling plate 21 along the third direction Z, and the adapter 422 is bonded to the second channel cover plate 212 by the second adhesive layer 52. The second adhesive layer 52 is made of thermally conductive material, thereby improving the heat conduction efficiency between the adapter 422 and the second channel cover plate 212, and thus enhancing the cooling effect of the second cooling plate 21 on the second electrical module 42.

[0091] In some embodiments, see Figure 10 As shown, a third adhesive layer 53 is provided between the base 421 and the second channel cover 212. The third adhesive layer 53 is made of a thermally conductive material and is suitable for bonding the base 421 and the second channel cover 212.

[0092] It should be noted that by providing a second adhesive layer 52 between the base 421 and the second channel cover 212, the adapter 422 is bonded to the second channel cover 212 through the second adhesive layer 52. This allows for the cooling of the adapter 422, thereby cooling the second electrical module 42. Since the adapter 422 is made of a material with high thermal conductivity, most of the heat inside the second electrical module 42 can be carried away during the cooling process. At the same time, by providing a third adhesive layer 53 between the base 421 and the second channel cover 212, the side of the base 421 facing the second cooling plate 21 along the third direction Z is directly bonded to the second channel cover 212 through the third adhesive layer 53. This not only ensures the connection strength between the second electrical module 42 and the second cooling plate 21, but also further enhances the cooling effect of the second electrical module 42 by cooling the base 421.

[0093] In some embodiments, see Figure 10 As shown, an insulating sheet 215 is provided on the side of the second channel cover 212 facing the base 421. The insulating sheet 215 is suitable for insulating the second cooling plate 21 from the second electrical module 42.

[0094] In this embodiment, by providing an insulating sheet 215 between the second channel cover plate 212 and the base 421, the second electrical module 42 and the second cooling plate 21 are electrically isolated, preventing direct contact between the second electrical module 42 and the second cooling plate 21, avoiding short circuits and arc discharges between the second electrical module 42 and the second cooling plate 21, thereby ensuring the electrical safety of the battery pack.

[0095] Further, please see Figure 2 As shown, the first housing 10 also includes a side beam 12 and a first cover 13. The side beam 12 is arranged around the edge of the first cooling plate 11, and the first cover 13 is arranged on the side of the side beam 12 away from the first cooling plate 11 along the third direction Z. The side beam 12 and the first cover 13 together with the first cooling plate 11 form a first receiving cavity 100.

[0096] The second electrical module 42 and the second cooling plate 21 are disposed on the side of the first cover 13 away from the cell module 30 along the third direction Z.

[0097] The first cover 13 provides an installation position for the second housing 20 and the cell module 30 on the side away from the cell module 30 along the third direction Z. Moreover, through the mechanical isolation of the first cover 13, the first receiving cavity 100 and the second receiving cavity 200 are spatially isolated in the third direction Z, thereby realizing the layered arrangement of the battery pack along the third direction Z, separating the second electrical module 42 from the cell module 30, which facilitates the individual disassembly and maintenance of the second electrical module 42.

[0098] Furthermore, the side beam 12 can be connected to the first cover 13 and the first cooling plate 11 by bolts and / or screws.

[0099] Furthermore, the second electrical module 42 can be connected to the first cover 13 by bolts and / or screws.

[0100] In some embodiments, see Figure 11 As shown, the second housing 20 includes a shell 22 and a second cover 23. The shell 22 has openings 221 on both sides opposite to each other along the third direction Z. The second cover 23 covers one of the openings 221, and the second cooling plate 21 covers the other opening 221. The end of the second cooling plate 21 facing away from the shell 22 is connected to the first housing 10. The second cover 23, the shell 22 and the second cooling plate 21 enclose and form a second receiving cavity 200.

[0101] The second cover 23 is detachably connected to the housing 22.

[0102] In this embodiment, openings 221 are provided on both sides of the housing 22 along the third direction Z. A second cover 23 is provided over one of the openings 221, and a second cooling plate 21 is provided over the other opening 221. The second cover 23 is detachably connected to the housing 22, so that the second electrical module 42 in the second receiving cavity 200 can be maintained through the opening 221. After maintenance, the second cover 23 is used to seal the opening 221, thereby sealing the second receiving cavity 200 and preventing foreign objects from entering the second receiving cavity 200 and damaging the second electrical module 42.

[0103] Furthermore, the side of the housing 22 closest to the first cover 13 along the third direction Z can be bonded to the first cover 13, and the housing 22 and the first cover 13 can also be connected by bolts and / or screws.

[0104] According to an embodiment of the present invention, another aspect provides an electrical device, including: a device body, and a battery pack as described above.

[0105] In this embodiment, the electrical device uses the aforementioned battery pack. By dividing the electrical module 40 into two modules and placing them respectively in the first receiving cavity 100 and the second receiving cavity 200, the proportion of the electrical module 40 occupied in the cell receiving space is reduced, allowing for more efficient use of the cell receiving space in the first receiving cavity 100 and thus leaving more space for the cells. The first housing 10 cools the cell module 30 and the first electrical module 41 through the first cooling plate 11. The second cooling plate 21 is independently set with respect to the first cooling plate 11, facilitating individual control. By separately setting the second cooling plate 21 to cool and dissipate heat from the second electrical module 42, the cooling effect on the electrical module 40 is improved, achieving independent liquid cooling of the upper electrical area of ​​the battery pack. This allows for the arrangement of as many individual cells as possible within a limited space, while ensuring heat dissipation for the cell module and the electrical module, thus ensuring the normal operation of the battery pack.

[0106] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack having intersecting first directions (X), second directions (Y), and a third direction (Z), characterized in that, include: The first housing (10) has a first receiving cavity (100); The battery cell module (30) is disposed within the first receiving cavity (100); The second housing (20) is connected to the first housing (10) on one side along the third direction (Z); the second housing (20) has a second receiving cavity (200); An electrical module (40) includes a first electrical module (41) and a second electrical module (42) connected to each other. The second electrical module (42) is disposed in the second receiving cavity (200), and the first electrical module (41) is disposed in the first receiving cavity (100) and connected to the battery cell module (30). The first housing (10) has a first cooling plate (11), which is disposed in the first receiving cavity (100) and connected to the side of the battery cell module (30) away from the second housing (20). The first cooling plate (11) is adapted to cool the battery cell module (30). The first electrical module (41) has its orthographic projection along the third direction (Z) at least partially located on the first cooling plate (11). The second housing (20) has a second cooling plate (21) connected to the first electrical module (41) on the third direction (Z) side and located between the second electrical module (42) and the first housing (10); the second cooling plate (21) is adapted to cool the second electrical module (42).

2. The battery pack according to claim 1, characterized in that, The second cooling plate (21) includes a second channel plate body (211) and a second channel cover plate (212) that are attached to each other. The second channel plate body (211) and the second channel cover plate (212) are stacked along the third direction (Z), and the second channel cover plate (212) is located between the second electrical module (42) and the second channel plate body (211). A portion of the second channel plate body (211) is recessed in the direction away from the second electrical module (42) to form a second flow channel groove (2110), and the second channel cover plate (212) is adapted to enclose the second flow channel groove (2110) together to form a second cooling flow channel (210).

3. The battery pack according to claim 2, characterized in that, The second housing (20) is provided with a second inlet pipe (213) and a second outlet pipe (214); The second channel cover plate (212) has an inlet (2121) and an outlet (2122) on the side opposite to the second channel plate body (211). The inlet (2121) and the outlet (2122) are spaced apart and both are connected to the second cooling channel (210). The inlet (2121) is connected to the second inlet pipe (213), and the outlet (2122) is connected to the second outlet pipe (214).

4. The battery pack according to claim 3, characterized in that, The first cooling plate (11) has a first cooling channel (110); the first housing (10) is provided with a first liquid inlet pipe (113) and a first liquid outlet pipe (114), and the first liquid inlet pipe (113) and the first liquid outlet pipe (114) are both connected to the first cooling channel (110); The first liquid inlet pipe (113) and the first liquid outlet pipe (114) are disposed on one side of the battery pack along the second direction (Y), and the second liquid inlet pipe (213) and the second liquid outlet pipe (214) are disposed on the other side of the battery pack along the second direction (Y).

5. The battery pack according to claim 3, characterized in that, The second electrical module (42) includes a first component (401) and a second component (402). The first component (401) and the second component (402) are both located on the same side of the second channel cover (212) away from the battery cell module (30). The heating power of the first component (401) is greater than that of the second component (402). The number of the second cooling channel (210) is one, and the second cooling channel (210) has a medium flow direction from the liquid inlet (2121) to the liquid outlet (2122); along the medium flow direction, the first component (401) is disposed upstream of the second component (402).

6. The battery pack according to claim 2, characterized in that, The second electrical module (42) includes a base (421) and a connector (422) disposed in the base (421). The base (421) is connected to the side of the second channel cover (212) away from the first housing (10). The base (421) has a through hole (4211) extending through the base (421) in a third direction (Z), the through hole (4211) is adapted to install the adapter (422), and the adapter (422) is at least partially exposed on the side of the base (421) facing the second channel cover (212); A second adhesive layer (52) is provided between the adapter (422) and the second channel cover (212), and the second adhesive layer (52) is adapted to bond the adapter (422) and the second channel cover (212).

7. The battery pack according to claim 6, characterized in that, A third adhesive layer (53) is provided between the base (421) and the second channel cover (212). The third adhesive layer (53) is made of a thermally conductive material and is suitable for bonding the base (421) and the second channel cover (212).

8. The battery pack according to claim 6, characterized in that, An insulating sheet (215) is provided on the side of the second channel cover (212) facing the base (421), and the insulating sheet (215) is adapted to insulate the second cooling plate (21) from the second electrical module (42).

9. The battery pack according to any one of claims 1-8, characterized in that, The second housing (20) includes a shell (22) and a second cover (23). The shell (22) has openings (221) on both sides opposite to each other along the third direction (Z). The second cover (23) covers one of the openings (221), and the second cooling plate (21) covers the other opening (221). The end of the second cooling plate (21) away from the shell (22) is connected to the first housing (10). The second cover (23), the shell (22), and the second cooling plate (21) enclose and form the second receiving cavity (200). The second cover (23) is detachably connected to the housing (22).

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

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