Battery pack and powered device

Abstract

The battery pack and the electric device are provided, and relate to the field of batteries.The battery pack comprises a box body, a battery pack and a heat exchange element.The box body is provided with an accommodation space.The battery pack is arranged in the accommodation space.The heat exchange element is in heat exchange coupling with the battery pack, and comprises a port portion and a flow channel plate.The port portion is located at one end of the flow channel plate in a first direction.The port portion is provided with a port.A flow channel is arranged in the flow channel plate.Heat exchange medium flows into the flow channel through the port or flows out of the flow channel through the port.The flow channel comprises a plurality of sub-flow channels.The plurality of sub-flow channels extend along the first direction and are arranged side by side along a second direction.The heat exchange element is further provided with a plurality of flow distribution holes located between the port portion and the plurality of sub-flow channels along the first direction.The plurality of flow distribution holes are arranged side by side along the second direction.The plurality of sub-flow channels are in fluid communication with the port through the plurality of flow distribution holes.The first direction, the second direction and the thickness direction of the flow channel plate are perpendicular to each other.The heat exchange medium is evenly distributed, and the temperature consistency and the heat management precision of the battery pack are significantly improved.

Description

Technical Field

[0001] This disclosure relates to the field of batteries, and in particular, to a battery pack and an electrical device having the battery pack. Background Technology

[0002] The battery pack, comprising a battery assembly and a heat exchanger, is known. The heat exchanger may contain multiple flow channels. The heat exchange medium can flow from external pipes into these pre-designed channels and across the main heat exchange surfaces of the battery assembly, thus facilitating sufficient heat exchange between the heat exchange medium and the battery. After heat absorption is complete, the heat exchange medium flows out through external pipes, thereby achieving temperature control of the battery.

[0003] However, the heat exchange medium is difficult to distribute evenly to each parallel flow channel at the inflow end and is also difficult to collect evenly at the outflow end, which reduces the overall heat exchange efficiency of the battery pack. Utility Model Content

[0004] In view of this, the present disclosure provides a battery pack designed to solve the problem that the heat exchange medium is difficult to distribute evenly to each parallel flow channel within the heat exchanger.

[0005] The battery pack includes a housing, a battery pack, and a heat exchanger. The housing has a receiving space. The battery pack is housed within the receiving space. The heat exchanger is heat-coupled with the battery pack and includes a port section and a flow channel plate. The port section is located at one end of the flow channel plate in a first direction and has a port. The flow channel plate has a flow channel. The heat exchange medium flows into the flow channel through the port or flows out of the flow channel through the port. The flow channel includes multiple sub-flow channels. The multiple sub-flow channels extend along the first direction and are arranged side by side along a second direction. The heat exchanger also has multiple distribution holes located between the port section and the multiple sub-flow channels along the first direction. The multiple distribution holes are arranged side by side along the second direction. The multiple sub-flow channels are in fluid communication with the port through the multiple distribution holes. The first direction, the second direction, and the thickness direction of the flow channel plate are perpendicular to each other.

[0006] By setting multiple distribution holes arranged side-by-side along the second direction between the port and the sub-channels, the heat exchange medium from the port is first diverted and then guided to each parallel sub-channel. This effectively overcomes the problem of uneven distribution of the heat exchange medium when entering multiple sub-channels, ensuring that each sub-channel receives a relatively balanced flow rate. This makes the heat exchange of the battery pack more uniform in the second direction, i.e., the width direction of the flow channel plate, avoiding local overheating or undercooling. Similarly, after heat exchange is completed, the heat exchange medium in each sub-channel converges to the port through the corresponding distribution holes and is finally discharged from a unified port. Avoiding uneven distribution of the heat exchange medium significantly improves the temperature consistency and thermal management accuracy of the battery pack.

[0007] This disclosure also includes electrical equipment, including the aforementioned battery pack. Attached Figure Description

[0008] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0009] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0010] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0011] Figure 1 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present disclosure.

[0012] Figure 2 for Figure 1 A schematic diagram of the heat exchanger.

[0013] Figure 3 for Figure 2 A magnified view of part A in the middle.

[0014] Figure 4 for Figure 1 A schematic diagram of the heat exchanger.

[0015] Figure 5 for Figure 4 A magnified view of part B in the middle section.

[0016] Figure 6 for Figure 2 A magnified view of a portion of the heat exchanger.

[0017] Figure 7 for Figure 2 A partial enlarged view of part A according to another embodiment of the present disclosure.

[0018] Figure 8 This is a partial cross-sectional view of an electrical appliance according to an embodiment of the present disclosure.

[0019] Figure captions: 100—Battery pack; 10—Casing; 20—Battery group; 30—Heat exchanger; 31—Port section; 311—Port; 321—Sub-channel; 321a—First sub-channel; 321n—Nth sub-channel; 32—Channel plate; 322—Separator wall; 322a—First separator wall; 322b—(n-1)th separator wall; 322n—Nth separator wall; 323—Merging section; 324—Receiving recess; 33—Flow distribution hole; 34—Mixing cavity; 35—End plate; 351—Plug-in section; 352—Groove; 353—Cover plate; 200—Electrical equipment. Detailed Implementation

[0020] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0021] <Example Battery Pack> This disclosure provides a battery pack 100 according to one embodiment. (See reference...) Figure 1 The battery pack 100 includes a housing 10 and a battery pack 20. Multiple batteries are electrically connected to form the battery pack 20. The housing 10 houses the batteries and the battery management system. The batteries are electrically connected to the battery management system to enable the charging and discharging of multiple batteries. The housing 10 serves as an external protective structure, typically made of metal or composite materials, and is waterproof, dustproof, and impact-resistant, providing a safe operating environment for internal components such as the batteries and battery management system.

[0022] The battery pack 100 may also include a battery group 20 composed of multiple batteries connected in series and parallel, and integrate a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective components. These components are housed within the enclosure 10 and sealed by the top cover, forming a complete functional unit capable of directly outputting electrical energy. The battery pack 100 serves as a rechargeable battery group 20, acting as a power source for new energy vehicles, primarily for storing and providing electrical energy.

[0023] refer to Figures 2 to 4 The battery pack 100 also includes a heat exchanger 30. The housing 10 has a receiving space. The battery pack 20 is disposed in the receiving space. The heat exchanger 30 is heat-coupled with the battery pack 20 and includes a port portion 31 and a flow channel plate 32. The port portion 31 is located at one end of the flow channel plate 32 in a first direction and has a port 311. The flow channel plate 32 has a flow channel. The heat exchange medium flows into the flow channel through the port 311 or flows out of the flow channel through the port 311. The flow channel includes a plurality of sub-flow channels 321. The plurality of sub-flow channels 321 extend along the first direction and are arranged side by side along the second direction. The heat exchanger 30 also has a plurality of flow distribution holes 33 located between the port portion 31 and the plurality of sub-flow channels 321 along the first direction. The plurality of flow distribution holes 33 are arranged side by side along the second direction. The plurality of sub-flow channels 321 are in fluid communication with the port 311 through the plurality of flow distribution holes 33. The first direction, the second direction and the thickness direction of the flow channel plate 32 are perpendicular to each other.

[0024] For ease of description, in the accompanying drawings of this disclosure, arrows X+ and X- respectively indicate opposite sides in the first direction, arrows Y+ and Y- respectively indicate opposite sides in the second direction, and arrows Z+ and Z- respectively indicate opposite sides in the thickness direction of the flow channel plate 32.

[0025] By providing multiple distribution holes 33 arranged side-by-side along the second direction between the port section 31 and the sub-channels 321, the heat exchange medium from the port 311 is first diverted and then guided to each parallel sub-channel 321. This effectively overcomes the problem of uneven distribution of the heat exchange medium when entering multiple sub-channels, ensuring that each sub-channel 321 can obtain a relatively balanced flow rate. It can be understood that the heat exchanger 30 is provided with multiple distribution holes 33. In the figure, only one distribution hole 33 is marked as a representative for clear presentation of the structure. It should be understood that there are actually multiple distribution holes 33. Similarly, for clear presentation of the structure, not all sub-channels 321 are marked. The figure should not be interpreted as a limitation on their number. This makes the heat exchange of the battery pack 20 more uniform in the second direction, that is, in the width direction of the flow channel plate 32, avoiding local overheating or undercooling. Similarly, after the heat exchange is completed, the heat exchange medium in each sub-channel 321 flows to the port section 31 through the corresponding distribution holes 33 and is finally discharged from the unified port 311. This significantly improves the temperature consistency and thermal management accuracy of the battery pack 100.

[0026] refer to Figure 5 The overall dimension of the multiple sub-channels 321 in the second direction is W1 (in mm), and the overall dimension of the multiple distribution holes 33 in the second direction is W2 (in mm), where 0.1 ≤ W2 / W1 ≤ 0.2. Preferably, 0.12 ≤ W2 / W1 ≤ 0.18. More preferably, 0.13 ≤ W2 / W1 ≤ 0.17. Alternatively, the ratio W2 / W1 can also be 0.14, 0.15, 0.16, or 0.165, etc. If W2 / W1 is too small, i.e., W2 / W1 is less than 0.1, the overall width of the distribution hole 33 region is much smaller than the overall width of the sub-channel group 321. The fluid will first enter the path of least resistance, that is, most of the heat exchange medium will flow directly into the sub-channel 321 directly opposite the distribution hole 33, while the sub-channels 321 on both sides will have almost no heat exchange medium flowing in due to high flow resistance and long flow path. If W2 / W1 is too large, i.e., W2 / W1 is greater than 0.2, the width of the distribution orifice 33 region is almost equal to or even greater than the width of the sub-channel 321. The distribution orifice 33 cannot effectively guide and distribute the fluid, and the fluid will still enter the sub-channel 321 disorderly, failing to guarantee the uniformity of flow rate in each sub-channel 321. Based on the above ratio range, it can be ensured that the fluid can flow smoothly into multiple sub-channels 321, avoiding uneven distribution between the two sub-channels 321.

[0027] Further, 500mm ≤ W1 ≤ 1300mm, preferably, z3a ≤ W1 ≤ z3b. More preferably, 700mm ≤ W1 ≤ 1100mm. Alternatively, the value of W1 can also be 800mm, 850mm, 900mm, or 1000mm, etc. 80mm ≤ W2 ≤ 180mm, preferably, 100mm ≤ W2 ≤ 160mm. More preferably, 110mm ≤ W2 ≤ 150mm. Alternatively, the value of W2 can also be 120mm, 130mm, 140mm, or 145mm, etc.

[0028] refer to Figure 4 and Figure 5 The number of multiple sub-channels 321 is N1, and the number of multiple distribution holes 33 is N2, where 0.35 ≤ N2 / N1 ≤ 0.56. Preferably, 0.4 ≤ N2 / N1 ≤ 0.5. More preferably, 0.42 ≤ N2 / N1 ≤ 0.48. Alternatively, the ratio N2 / N1 can also be 0.43, 0.44, 0.45, or 0.46. If N2 / N1 is too small, i.e., N2 / N1 is less than 0.35, the number of distribution holes 33 is insufficient to effectively cover the distribution requirements of the sub-channels 321. This will cause a single distribution hole 33 to distribute heat exchange medium to multiple sub-channels 321, which may result in flow deviation due to local flow resistance differences and lack of effective flow guidance, weakening the temperature consistency of the battery pack 20 in the second direction. If N2 / N1 is too large, i.e., N2 / N1 greater than 0.56, the number of flow distribution holes 33 will be excessive. Too many flow distribution holes 33 will complicate the structure of the port section 31, increase the manufacturing difficulty, and weaken the mechanical strength. At the same time, too many flow distribution holes 33 will weaken the throttling and pressure equalization capabilities, and reduce the ability to regulate the flow resistance of each sub-channel 321. Based on the above ratio range, a clear fluid path can be established between the flow distribution holes 33 and the sub-channels 321 to ensure that each sub-channel 321 obtains a uniform heat exchange medium flow rate.

[0029] Further, 13≤N1≤23, preferably 15≤N1≤21. More preferably, 16≤N1≤20. Alternatively, the value of N1 can also be 17, 18, or 19, etc. 32≤N2≤40, preferably 33≤N2≤39. More preferably, 34≤N2≤38. Alternatively, the value of N2 can also be 35, 36, or 37, etc.

[0030] Continue to refer to Figure 5Each sub-channel 321 has a dimension of w in the second direction, in mm, and each distribution orifice 33 has a diameter of d, in mm, where 0.08 ≤ d / w ≤ 0.14. Preferably, 0.09 ≤ d / w ≤ 0.13. More preferably, 0.095 ≤ d / w ≤ 0.125. Alternatively, the ratio d / w can also be 0.1, 0.115, or 0.12, etc. If d / w is too small, i.e., less than 0.08, the throttling effect of the distribution orifice 33 is too strong, resulting in a significant increase in local flow resistance and weakening the fluid distribution capacity. At the same time, the small orifice diameter also increases the risk of the distribution orifice 33 being blocked by impurities. If d / w is too large, i.e., greater than 0.14, the throttling effect of the distribution orifice 33 is too weak, and it cannot effectively balance the inherent flow resistance differences between the sub-channels 321. The fluid will concentrate in the sub-channel 321 with the least resistance. An excessively large orifice diameter will also weaken the guiding effect of the distribution orifice 33 on the fluid direction, which may generate vortex phenomena and is not conducive to achieving uniform distribution. According to the above ratio range, the distribution orifice 33 can provide appropriate throttling, avoid uneven flow resistance, and achieve uniform flow of the heat exchange medium among the sub-channels 321.

[0031] Further, 40mm ≤ w ≤ 50mm, preferably 42mm ≤ w ≤ 48mm. More preferably, 43mm ≤ w ≤ 47mm. Alternatively, the value of w can also be 44mm, 45mm, or 46mm, etc. 2mm ≤ d ≤ 8mm, preferably 3mm ≤ d ≤ 7mm. More preferably, 4mm ≤ d ≤ 6mm. Alternatively, the value of d can also be 4.5mm, 5mm, or 5.5mm, etc.

[0032] Continue to refer to Figure 5 Multiple sub-channels 321 are sequentially arranged along the second direction, including a first sub-channel 321a to an nth sub-channel 321n, with the nth sub-channel 321n located on the outermost side of the flow channel. The overlap dimension of the first sub-channel 321a and the multiple distribution holes 33 along the second direction is P1 (in mm), and the overlap dimension of the nth sub-channel 321n and the multiple distribution holes 33 along the second direction is P2 (in mm), where P1 > P2. This can actively compensate for the pressure gradient present when the fluid flows along the second direction within the port portion 31. Typically, the pressure is highest in the central sub-channel 321 region directly opposite the port 311, while the pressure gradually decreases as the fluid flows towards the sub-channels 321 on both sides due to frictional resistance. If all sub-channels 321 have the same overlap dimension with the distribution holes 33, more fluid will rush into the central sub-channel 321 due to the pressure difference, resulting in insufficient flow on both sides. By making the overlap size P1 of the innermost first sub-channel 321a larger than the overlap size P2 of the outermost nth sub-channel 321n, the actual flow rate obtained from the first sub-channel 321a to the nth sub-channel 321n can be made to be consistent, thus ensuring the uniform distribution of the heat exchange medium in the battery pack 20 in the second direction.

[0033] Continue to refer to Figure 5 Each sub-channel 321 has a dimension w in the second direction, in mm, where 0.58 ≤ P1 / w ≤ 0.95, preferably 0.6 ≤ P1 / w ≤ 0.9. More preferably, 0.65 ≤ P1 / w ≤ 0.85. Alternatively, the ratio P1 / w can also be 0.7, 0.73, 0.76, or 0.82. If P1 / w is too small, i.e., less than 0.58, the overlap area between the first sub-channel 321a and the distribution hole 33 is severely insufficient, resulting in excessive flow resistance at the inlet of the channel. Too small a P1 / w will excessively suppress the flow rate of the first sub-channel 321a, making it impossible to achieve uniform temperature across the entire flow channel plate 32. If P1 / w is too large, i.e., P1 / w is greater than 0.95, the inlet flow area of ​​the first sub-channel 321a is too large and the flow resistance is too small. In this case, too much heat exchange medium will flow into the first sub-channel 321a, exacerbating the uneven distribution of the flow rate in the middle sub-channel 321 compared to the flow rates on both sides. The pressure gradient at port 311 cannot be effectively compensated, and the problem of uneven flow distribution still exists. Based on the above ratio range, it is ensured that the battery pack 20 receives a balanced heat exchange medium from the first sub-channel 321a to the nth sub-channel 321n.

[0034] Continue to refer to Figure 5 Each sub-channel 321 has a dimension w in the second direction, in mm, where 0.05 ≤ P2 / w ≤ 0.1, preferably 0.06 ≤ P2 / w ≤ 0.09. More preferably, 0.065 ≤ P2 / w ≤ 0.085. Alternatively, the ratio P2 / w can also be 0.07, 0.074, 0.078, or 0.082. If P2 / w is too small, i.e., less than 0.05, the inlet flow area of ​​the nth sub-channel 321n is severely insufficient, resulting in excessive flow resistance and a significantly lower flow rate than other sub-channels 321, leading to insufficient cooling of the outermost region of the battery pack 20. If P2 / w is too large, i.e., P2 / w is greater than 0.1, the inlet flow area of ​​the nth sub-channel 321n is too large and the inlet resistance is too small. Although this facilitates fluid inflow, the excessively large opening will reduce the flow resistance gradient between it and the adjacent sub-channel 321, weakening the ability to precisely control its flow rate. Simultaneously, the excessive extension of the distribution orifice 33 to the edge region of the flow channel plate 32 will weaken the mechanical structural strength at that location. Based on the above proportional range, a moderately low flow resistance channel is provided for the nth sub-channel 321n, effectively compensating for the insufficient pressure caused by its location at the edge of the flow channel plate 32, ensuring that sufficient heat transfer medium can reach and flow through the outermost heat transfer area.

[0035] Further, 22.5mm ≤ P1 ≤ 33.5mm, preferably 24mm ≤ P1 ≤ 32mm. More preferably, 26mm ≤ P1 ≤ 30mm. Alternatively, the value of P1 can also be 27mm, 28mm, 29mm, or 29.5mm, etc. 2mm ≤ P2 ≤ 5mm, preferably 2.5mm ≤ P2 ≤ 4.5mm. More preferably, 3mm ≤ P2 ≤ 4mm. Alternatively, the value of P2 can also be 3.2mm, 3.4mm, 3.5mm, or 3.8mm, etc. 40mm ≤ w ≤ 50mm, preferably 41mm ≤ w ≤ 49mm. More preferably, 42mm ≤ w ≤ 48mm. Alternatively, the value of w can also be 43mm, 44mm, 45mm, or 47mm, etc.

[0036] Continue to refer to Figure 5 The distance D1 from the multiple distribution holes 33 to the outer edge of the flow channel plate 32 in the second direction is 36.5mm≤D1≤48.5mm. Preferably, 38mm≤D1≤47mm. More preferably, 39mm≤D1≤46mm. Alternatively, D1 can also be 40mm, 42mm, 44mm, or 45mm. If D1 is too small, i.e., D1 is less than 36.5mm, the distribution holes 33 are too close to the outer edge of the flow channel plate 32, resulting in insufficient edge material width. This weakens the mechanical strength and rigidity of the edge area, making it prone to deformation or even cracking under the pressure load of the heat exchange medium or external assembly stress, leading to leakage risk. If D1 is too large, i.e., D1 is greater than 48.5mm, the position of the distribution holes 33 is excessively offset inward, resulting in some heat exchange space that could have been used to arrange the sub-flow channels 321 being idle, reducing the space utilization efficiency and overall heat exchange capacity of the flow channel plate 32. Based on the above ratio range, ensure that the edge of the flow channel plate 32 has sufficient material width to withstand internal pressure and mechanical stress, and maximize the available heat exchange width of the flow channel plate 32.

[0037] Continue to refer to Figure 5 The flow channel plate 32 is further provided with multiple partition walls 322, each partition wall 322 extending along a first direction and separating two adjacent sub-flow channels 321. The multiple partition walls 322 are spaced apart from the multiple distribution holes 33 along the first direction, so that the multiple sub-flow channels 321 form a confluence section 323 between the multiple distribution holes 33 and the multiple partition walls 322. The partition walls 322 can prevent the flow channel plate 32 from collapsing or bulging due to stress, ensuring that the cross-sectional shape and flow area of ​​each sub-flow channel 321 remain stable, and guiding the heat exchange medium smoothly into each sub-flow channel 321. The confluence section 323 can provide a mixing area for the heat exchange medium flowing in from the distribution holes 33, which may have slight temperature differences. This helps to eliminate temperature deviations between the streams, making the temperature of the heat exchange medium subsequently entering the sub-flow channels 321 more uniform.

[0038] Continue to refer to Figure 5 Along the direction from the first sub-flow channel 321a to the nth sub-flow channel 321n, multiple partition walls 322, including the first partition wall 322a to the nth partition wall 322n, have gradually increasing distances from the first partition wall 322a to the (n-1)th partition wall 322b to the multiple distribution holes 33 along the first direction. After flowing out of the distribution holes 33, the fluid first mixes in the confluence section 323 before entering the multiple sub-flow channels 321. The shorter confluence section 323 has greater flow resistance, while the longer confluence section 323 has less flow resistance. This provides greater resistance to the inner sub-flow channel 321 with higher pressure and less resistance to the outer sub-flow channel 321 with lower pressure, thereby actively compensating for the pressure attenuation from the inside to the outside within the port section 31, ensuring that the inlet flow rate of all sub-flow channels 321 tends to be consistent.

[0039] Continue to refer to Figure 5 The distance from the first partition wall 322a to the plurality of distribution holes 33 along the first direction is D2, in mm, and the distance from the (n-1)th partition wall 322b to the plurality of distribution holes 33 along the first direction is D3, in mm, where 1.8 ≤ D3 / D2 ≤ 2.2. Preferably, 1.85 ≤ D3 / D2 ≤ 2.15. More preferably, 1.9 ≤ D3 / D2 ≤ 2.1. Alternatively, the ratio D3 / D2 can also be 1.95, 2, 2.05, or 2.08, etc. If D3 / D2 is too small, i.e., D3 / D2 is less than 1.8, the decreasing gradient from the first partition wall 322a to the (n-1)th partition wall 322b is insufficient, and the increasing gradient of the confluence section 323 is insufficient. The confluence section 323 of the outermost sub-channel 321 cannot obtain a sufficiently long length to reduce its flow resistance, and cannot effectively compensate for the driving pressure. This will result in the flow rate of the outer sub-channel 321 still being generally lower than that of the inner sub-channel 321, resulting in a weaker heat transfer intensity in the edge region of the battery pack 20. If D3 / D2 is too large, i.e., D3 / D2 is greater than 2.2, the decreasing gradient from the first partition wall 322a to the (n-1)th partition wall 322b is too large, and the confluence section 323 of the outermost sub-channel 321 is too long, resulting in its flow resistance being significantly lower than that of the inner channel. This will cause overcompensation for pressure loss, which may form turbulence, exacerbate energy loss, and disrupt the stable heat transfer of the sub-channel 321. Based on the above ratio range, it can be ensured that the flow rate from the first sub-channel 321a to the nth sub-channel 321n is highly uniform.

[0040] Further, 13mm ≤ D2 ≤ 17mm, preferably 13.5mm ≤ D2 ≤ 16.5mm. More preferably, 13mm ≤ D2 ≤ 16mm. Alternatively, the value of D2 can also be 14mm, 14.5mm, 15mm, or 15.5mm, etc. 25mm ≤ D3 ≤ 35mm, preferably 28mm ≤ D3 ≤ 33mm. More preferably, 29mm ≤ D3 ≤ 32mm. Alternatively, the value of D3 can also be 30mm, 30.5mm, 31mm, or 31.5mm, etc.

[0041] Back Figure 3 The heat exchanger 30 also includes a mixing chamber 34, through which multiple distribution holes 33 are connected to the port 311. The mixing chamber 34 creates a stable pressure-equalizing transition zone between the port 311 and the multiple distribution holes 33, which can fully dissipate the jet kinetic energy from the port 311 and convert it into uniform static pressure, thereby providing pressure-equal fluid to the multiple distribution holes 33 and improving the uniformity of flow distribution. At the same time, the mixing chamber 34 prevents high-pressure fluid from directly impacting a particular distribution hole 33, achieving a smooth transition and guidance of fluid from the port 311 to the distribution holes 33.

[0042] refer to Figure 3 and Figure 6 The heat exchanger 30 also includes an end plate 35, which is located at one end of the flow channel plate 32 in the first direction. A port portion 31 is located on one side of the end plate 35 in the thickness direction. The flow channel plate 32 has a receiving recess 324 at one end near the end plate 35, and an insertion portion 351 is provided at one end of the end plate 35 near the flow channel plate 32. The insertion portion 351 is inserted into the receiving recess 324. Multiple sub-flow channels 321 extend into the receiving recess 324. A mixing chamber 34 is located within the end plate 35, and multiple flow distribution holes 33 extend from the mixing chamber 34 to the end face of the insertion portion 351. The mating structure of the insertion portion 351 and the receiving recess 324 provides a clear positioning reference for the end plate 35 and the flow channel plate 32, ensuring their installation accuracy in the first and thickness directions. It also increases the contact area, helping to improve the sealing reliability of the connection interface and reduce the risk of heat exchange medium leakage. The mixing chamber 34 is located inside the end plate 35 and is directly connected to the distribution hole 33 extending to the end face of the insertion part 351. This allows the heat exchange medium to be evenly distributed from the port 311 through the mixing chamber 34 and then directly enter the flow channel plate 32, reducing flow loss and improving the uniformity of flow distribution.

[0043] The end plate 35 has a groove 352, and the groove 352 has an opening on the side opposite to the port portion 31. A cover plate 353 is installed on the end plate 35, and the cover plate 353 closes the opening to cooperate with the groove 352 to form a mixing chamber 34. Figure 3 For case 353 where the cover plate is not installed, such as Figure 7To accommodate the installation of the cover plate 353, the structure of the mixing chamber 34 is decomposed into a groove 352 on the end plate 35 and an independent cover plate 353. This reduces the difficulty of part forming, especially facilitating the machining of the flow distribution hole 33, effectively controlling manufacturing complexity and production costs. Simultaneously, it facilitates the cleaning and inspection of the interior of the mixing chamber 34 before assembly, ensuring no residual impurities and improving the cleanliness and reliability of the product.

[0044] <Example Electrical Equipment> This utility model embodiment also provides an electrical device 200, which may include the battery pack 100 described above.

[0045] By way of example only, electrical equipment 200 can be, but is not limited to, vehicles, ships, aircraft, household appliances, and industrial equipment. For example, vehicles can be passenger cars, trucks, construction vehicles, etc.

[0046] In addition, the electrical equipment 200 can also be used for the storage, conversion and release of recyclable electrical energy.

[0047] In a non-restrictive example, refer to Figure 8 The electrical equipment 200 can be the car 200, and the battery pack 100 can be used as a power source to provide power to the car 200.

[0048] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0049] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0050] It should be understood that although terms such as “first” or “second” may be used in this disclosure to describe various elements (such as a first direction and a second direction), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0051] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0052] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A battery pack, characterized in that, include: The container has storage space; The battery pack is located within the aforementioned accommodating space; as well as A heat exchanger, heat-coupled with the battery pack, includes a port portion and a flow channel plate. The port portion is located at one end of the flow channel plate in a first direction. The port portion has a port, and the flow channel plate has a flow channel. The heat exchange medium flows into the flow channel through the port or flows out of the flow channel through the port. The flow channel includes multiple sub-flow channels. The multiple sub-flow channels extend along the first direction and are arranged side by side along a second direction. The heat exchanger also has multiple distribution holes located between the port portion and the multiple sub-flow channels along the first direction. The multiple distribution holes are arranged side by side along the second direction. The multiple sub-flow channels are in fluid communication with the port through the multiple distribution holes. The first direction, the second direction, and the thickness direction of the flow channel plate are perpendicular to each other.

2. The battery pack according to claim 1, characterized in that, The overall dimension of the plurality of sub-channels in the second direction is W1, in mm, and the overall dimension of the plurality of distribution holes in the second direction is W2, in mm, where 0.1 ≤ W2 / W1 ≤ 0.

2.

3. The battery pack according to claim 2, characterized in that, 500mm≤W1≤1300mm, and / or, 80mm≤W2≤180mm.

4. The battery pack according to claim 2, characterized in that, The number of the plurality of sub-channels is N1, the number of the plurality of distribution holes is N2, and 0.35≤N2 / N1≤0.

56.

5. The battery pack according to claim 4, characterized in that, 13≤N1≤23, and / or, 32≤N2≤40.

6. The battery pack according to claim 2 or 4, characterized in that, The dimension of each sub-channel in the second direction is w, in mm, and the diameter of each distribution hole is d, in mm, where 0.08 ≤ d / w ≤ 0.

14.

7. The battery pack according to claim 2, characterized in that, 40mm≤w≤50mm, and / or, 2mm≤d≤8mm.

8. The battery pack according to claim 2, characterized in that, The plurality of sub-channels include, sequentially, a first sub-channel to an nth sub-channel along the second direction. The nth sub-channel is located on the outermost side of the channel. The overlap dimension of the first sub-channel and the plurality of distribution holes in the second direction is P1 (in mm), and the overlap dimension of the nth sub-channel and the plurality of distribution holes in the second direction is P2 (in mm), where P1 > P2.

9. The battery pack according to claim 8, characterized in that, The dimension of each sub-channel in the second direction is w, in mm, and 0.58≤P1 / w≤0.

95.

10. The battery pack according to claim 8, characterized in that, The dimension of each sub-channel in the second direction is w, in mm, and 0.05≤P2 / w≤0.

1.

11. The battery pack according to claim 9 or 10, characterized in that, 22.5mm≤P1≤33.5mm, and / or, 2mm≤P2≤5mm, and / or, 40mm≤w≤50mm.

12. The battery pack according to claim 8, characterized in that, The distance from the plurality of flow distribution holes to the outer edge of the flow channel plate in the second direction is D1, in mm, where 36.5 mm ≤ D1 ≤ 48.5 mm.

13. The battery pack according to claim 8, characterized in that, The flow channel plate is also provided with a plurality of partition walls, each partition wall extending along the first direction and separating two adjacent sub-flow channels. The plurality of partition walls are arranged at intervals with the plurality of flow distribution holes along the first direction, so that the plurality of sub-flow channels form a confluence section between the plurality of flow distribution holes and the plurality of partition walls.

14. The battery pack according to claim 13, characterized in that, Along the direction from the first sub-channel to the nth sub-channel, the plurality of partition walls include the first partition wall to the nth partition wall, and the distance from the first partition wall to the (n-1)th partition wall to the plurality of distribution holes gradually increases along the first direction.

15. The battery pack according to claim 14, characterized in that, The distance from the first partition wall along the first direction to the plurality of distribution holes is D2, in mm, and the distance from the (n-1)th partition wall along the first direction to the plurality of distribution holes is D3, in mm, where 1.8 ≤ D3 / D2 ≤ 2.

2.

16. The battery pack according to claim 15, characterized in that, 13mm≤D2≤17mm, and / or, 25mm≤D3≤35mm.

17. The battery pack according to claim 1, characterized in that, The heat exchanger is also provided with a mixing chamber, and the plurality of distribution holes are connected to the port through the mixing chamber.

18. The battery pack according to claim 17, characterized in that, The heat exchanger further includes an end plate located at one end of the flow channel plate in the first direction. The port portion is disposed on one side of the end plate in the thickness direction. The flow channel plate has a receiving recess at one end near the end plate and a plug-in portion at one end near the flow channel plate. The plug-in portion is inserted into the receiving recess. The plurality of sub-flow channels extend into the receiving recess. The mixing cavity is disposed in the end plate. The plurality of flow distribution holes extend from the mixing cavity to the end face of the plug-in portion.

19. The battery pack according to claim 18, characterized in that, The end plate is provided with a groove, and the groove has an opening on the side opposite to the port portion. A cover plate is installed on the end plate, and the cover plate closes the opening to cooperate with the groove to form the mixing cavity.

20. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 1 to 19.

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