A battery pack

Abstract

The application discloses a battery pack and belongs to the technical field of batteries. The battery pack comprises a first shell, a second shell, a plurality of battery cell units, a first heat exchange unit, a second heat exchange unit and a current collecting unit. The second shell is covered on the first shell; the plurality of battery cell units are arranged in the first shell and the second shell at intervals and are electrically connected with each other; the first heat exchange unit is arranged between the battery cell units and the first shell and is configured to exchange heat with the bottom of the battery cell units; the second heat exchange unit is arranged in the interval between adjacent battery cell units and is configured to exchange heat with the outer sidewall of the battery cell units; and the current collecting unit is arranged in the first shell and the second shell and is configured to circulate heat exchange medium with the first heat exchange unit and the second heat exchange unit respectively, so that the heat dissipation blind area on the battery cell units is avoided, and the temperature rise problem of the battery pack under high-rate fast charging conditions can be effectively solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack. Background Technology

[0002] As electric vehicles increasingly demand higher driving range and charging efficiency, high-energy-density batteries and high-rate fast charging technology have become the mainstream development direction in the industry. However, high-rate fast charging generates a large amount of Joule heat and reaction heat inside the battery. If the heat cannot be dissipated in a timely and even manner, it will cause the battery pack temperature to rise sharply and the temperature difference to be too large. In severe cases, it can lead to thermal runaway, which greatly threatens battery life and safety.

[0003] Existing high-rate fast charging battery packs only cool the bottom surface of the battery cells, creating a heat dissipation blind zone in the upper part of the cells. During high-rate fast charging, the temperature in the upper part of the cells accumulates, which can easily cause local overheating of the battery and affect the overall temperature uniformity of the battery pack. Utility Model Content

[0004] This application provides a battery pack designed to avoid heat dissipation blind spots on the battery cells, effectively solving the temperature rise problem of the battery pack under high-rate fast charging conditions.

[0005] To achieve the above objectives, according to a first aspect of this application, a battery pack is provided, comprising: First shell; A second housing, which covers the first housing; A plurality of battery cell units are spaced apart within the first housing and the second housing, and the plurality of battery cell units are electrically connected to each other; A first heat exchange unit is disposed between the battery cell and the first housing, and the first heat exchange unit is configured to exchange heat with the bottom of the battery cell. The second heat exchange unit is disposed within the interval between adjacent battery cells and is configured to exchange heat with the outer wall of the battery cell. A heat exchange unit is disposed within the first housing and the second housing, and the heat exchange unit is configured to circulate heat exchange media with the first heat exchange unit and the second heat exchange unit, respectively.

[0006] Optionally, the heat exchange unit includes a first heat exchanger and a second heat exchanger, wherein the first heat exchanger is used to circulate the heat exchange medium with the first heat exchange unit, and the second heat exchanger is used to circulate the heat exchange medium with the second heat exchange unit.

[0007] Optionally, the first current collector includes a first current collector and a second current collector, the first current collector and the second current collector are arranged side by side, the input end of the first heat exchange unit is connected to the first current collector at an interval, and the output end of the first heat exchange unit is connected to the second current collector at an interval.

[0008] Optionally, the first heat exchange unit includes a first input flow channel, a first intermediate flow channel, a second intermediate flow channel and a first output flow channel connected in sequence. The first input flow channel and the first output flow channel are arranged side by side and adjacent to each other. The first intermediate flow channel and the second intermediate flow channel are arranged side by side and adjacent to each other. The first input flow channel is connected to the first collection section and the first output flow channel is connected to the second collection section.

[0009] Optionally, the second collector includes a first collector channel and a second collector channel, the first collector channel and the second collector channel are arranged side by side, the input end of the second heat exchange unit is connected to the first collector channel at an interval, and the output end of the second heat exchange unit is connected to the second collector channel at an interval.

[0010] Optionally, the second heat exchange unit includes a second input flow channel and a second output flow channel that are interconnected. The second input flow channel and the second output flow channel are arranged side by side and adjacent to each other. The second input flow channel is connected to the first collection channel, and the second output flow channel is connected to the second collection channel.

[0011] Optionally, the first manifold has a first inlet and a first outlet, the second manifold has a second inlet and a second outlet, a first connector is installed between the first inlet and the second inlet, and a second connector is installed between the first outlet and the second outlet.

[0012] Optionally, the battery pack further includes a positioning frame disposed within the first housing and the second housing to position a plurality of the battery cell units within the first housing and the second housing.

[0013] Optionally, the positioning frame includes a first beam, a second beam, a third beam, and a fourth beam, wherein the second beam intersects the middle of the first beam, and the third beam and the fourth beam are respectively located at the ends of the first beam.

[0014] Optionally, the second beam is provided with a first clearance portion at intervals to allow the second heat exchange unit to pass through the second beam; and / or, The third beam is located between the first heat exchange unit and the second collector to support the second collector.

[0015] In the battery pack of this application embodiment, by means of the above technical solution, a first heat exchange unit is provided at the bottom of the cell unit and a second heat exchange unit is provided in the interval between adjacent cell units in the battery. This can exchange heat between the bottom and the outer wall of the cell unit respectively, so that the temperature of each part of the cell unit is more balanced during operation, and heat dissipation blind spots are avoided on the cell unit. This can effectively solve the temperature rise problem of the battery pack under high-rate fast charging conditions.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 This is a schematic diagram of the overall structure of the battery pack provided in an exemplary embodiment of this disclosure; Figure 2 yes Figure 1 A schematic diagram of the internal structure of the provided battery pack from a first-person perspective; Figure 3 yes Figure 1 A schematic diagram of the internal structure of the provided battery pack from a second-view perspective; Figure 4 yes Figure 2 or Figure 3 A schematic diagram of the connection structure of a single cell, the first heat exchange unit, the second heat exchange unit, and the current collection unit; Figure 5 yes Figure 2 or Figure 3 Exploded structural diagram of a single cell, the first heat exchange unit, the second heat exchange unit, and the current collection unit; Figure 6 yes Figure 1 A schematic diagram of the internal structure of the first heat exchange unit from a first-view perspective; Figure 7 yes Figure 6 An enlarged schematic diagram of section C; Figure 8 yes Figure 1 A schematic diagram of the internal structure of the first heat exchange unit from a second perspective; Figure 9 yes Figure 8 An enlarged schematic diagram of section D in the middle; Figure 10 yes Figure 1 A three-dimensional structural diagram of the second heat exchange unit; Figure 11 yes Figure 1 A side view of the second heat exchange unit. Figure 12 yes Figure 11 A cross-sectional three-dimensional structural diagram along the AA direction; Figure 13 yes Figure 12 An enlarged schematic diagram of section E in the middle; Figure 14 yes Figure 5 Enlarged schematic diagram of part B.

[0020] Explanation of reference numerals in the attached figures: 100, First housing; 110, Second housing; 200, Battery cell unit; 300, First heat exchange unit; 310, First input channel; 320, First intermediate channel; 330, Second intermediate channel; 340, First output channel; 350, Receiving channel; 400, Second heat exchange unit; 410, Second input channel; 420, Second output channel; 500, Collector unit; 510, First collector; 511, First collector section; 5111, Extension section; 512, Second collector section; 513, First inlet; 514. 520. First outlet; 521. Second collector; 522. First collector channel; 523. Second collector channel; 524. Second outlet; 525. Sealing rib; 600. First connector; 610. Second connector; 700. Positioning frame; 710. First beam; 711. First slot; 720. Second beam; 721. First clearance part; 722. Second clearance part; 723. Second slot; 730. Third beam; 740. Fourth beam; X: Length direction; Y: Width direction; Z: Thickness direction. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] According to the first aspect of this application, please refer to Figures 1 to 5This disclosure provides a battery pack, including a first housing 100, a second housing 110, a plurality of battery cell units 200, a first heat exchange unit 300, a second heat exchange unit 400, and a current collector unit 500. The battery pack has intersecting length directions X, width directions Y, and thickness directions Z.

[0023] Specifically, the second housing 110 covers the first housing 100. The first housing 100 can be the lower casing of the battery pack, and the second housing 110 can be an upper cover adapted to the lower casing. The upper cover and the lower casing can be connected to each other in the thickness direction Z, thereby isolating the internal structure of the battery pack from the outside world and protecting the internal structure of the battery pack.

[0024] A plurality of battery cell units 200 are spaced apart within a first housing 100 and a second housing 110, and are electrically connected to each other. Each battery cell unit 200 may include multiple electrically connected individual battery cells. A heat insulation pad may be provided between adjacent individual battery cells within each battery cell unit 200 to prevent direct contact and mutual interference between adjacent individual battery cells.

[0025] A first heat exchange unit 300 is disposed between the cell unit 200 and the first housing 100, and the first heat exchange unit 300 is configured to exchange heat with the bottom of the cell unit 200. Multiple first heat exchange units 300 can be provided, and these units can be disposed along the length direction X between the cell unit 200 and the first housing 100, thereby enabling heat exchange with the bottom of each cell unit along the path of the first heat exchange unit 300.

[0026] The second heat exchange unit 400 is disposed within the interval between adjacent cell units 200, and is configured to exchange heat with the outer wall of the cell unit 200. In the width direction Y, there is a gap between adjacent cell units 200. Multiple second heat exchange units 400 can be provided, and these multiple second heat exchange units 400 can be disposed along the length direction X within the interval between adjacent cell units 200 in the width direction Y, thereby enabling heat exchange with the outer wall of each cell unit along the path of the second heat exchange unit 400.

[0027] A heat exchanger unit 500 is disposed within the first housing 100 and the second housing 110. The heat exchanger unit 500 is configured to circulate the heat exchange medium with the first heat exchanger unit 300 and the second heat exchanger unit 400, respectively. The heat exchanger unit 500 can not only deliver the heat exchange medium to the first heat exchanger unit 300 and the second heat exchanger unit 400, respectively, so that the heat exchange medium can exchange heat as it flows through the bottom and outer wall of the battery cell unit 200, but also collect the heat exchange medium after heat exchange between the first heat exchanger unit 300 and the second heat exchanger unit 400 and the battery cell unit 200, thereby realizing the flow of the heat exchange medium within the first heat exchanger unit 300 and the second heat exchanger unit 400.

[0028] Through the above technical solution, a first heat exchange unit 300 is set at the bottom of the cell unit 200, and a second heat exchange unit 400 is set in the interval between adjacent cell units 200 in the battery. This can exchange heat between the bottom and the outer wall of the cell unit 200 respectively, so that the temperature of each part of the cell unit 200 is more balanced during operation, and heat dissipation blind spots are avoided on the cell unit 200. This can effectively solve the problem of temperature rise of the battery pack under high-rate fast charging conditions.

[0029] In some embodiments, please refer to Figures 2 to 5 The current collector unit 500 includes a first current collector 510 and a second current collector 520. The first current collector 510 is used for circulating the heat exchange medium with the first heat exchange unit 300, and the second current collector 520 is used for circulating the heat exchange medium with the second heat exchange unit 400. Specifically, the first current collector 510 is made of aluminum profile. Both the first current collector 510 and the second current collector 520 are disposed within the ends of the first housing 100 and the second housing 110 in the length direction X. The heat exchange medium can enter the first heat exchange unit 300 through the first current collector 510, and the heat exchange medium after heat exchange with the bottom of the battery cell unit 200 can re-enter the first current collector 510. Thus, the heat exchange medium can continuously flow within the first heat exchange unit 300 through the first current collector 510 to achieve continuous heat exchange with the bottom of the battery cell unit 200. Furthermore, the heat exchange medium can enter the second heat exchange unit 400 through the second current collector 520, and the heat exchange medium after exchanging heat with the outer wall of the cell unit 200 can re-enter the second current collector 520. Thus, the second current collector 520 allows the heat exchange medium to continuously flow within the second heat exchange unit 400, achieving continuous heat exchange with the outer wall of the cell unit 200. In particular, when the battery pack is undergoing high-rate fast charging, the heat exchange medium in the first heat exchange unit 300 and the second heat exchange unit 400 can simultaneously exchange heat and cool the bottom and outer wall of the cell unit 200, preventing localized overheating of the cell unit 200 and making the battery pack operate more stably.

[0030] In some embodiments, please refer to Figures 6 to 9The first current collector 510 includes a first current collector 511 and a second current collector 512, which are arranged side by side. The input end of the first heat exchange unit 300 is connected to the first current collector 511 at a distance, and the output end of the first heat exchange unit 300 is connected to the second current collector 512 at a distance. Specifically, the first current collector 511 and the second current collector 512 can each be a tubular structure. The first current collector 511 and the second current collector 512 are arranged side by side and connected to each other. The heat exchange medium flowing in the first current collector 511 is not heat exchanged with the bottom of the battery cell unit 200. The heat exchange medium flowing in the second current collector 512 is heat exchanged with the bottom of the battery cell unit 200. Furthermore, by connecting the input ends of multiple first heat exchange units 300 to the first current collector 511 at intervals and connecting the output ends of multiple first heat exchange units 300 to the second current collector 512 at intervals, it helps to keep the flow resistance in each first heat exchange unit 300 balanced, avoids the problem of uneven flow distribution of heat exchange medium in each first heat exchange unit 300 due to flow resistance differences, and keeps the heat exchange effect of each cell unit 200 in the battery pack balanced.

[0031] In some embodiments, please continue to refer to Figures 6 to 9 The first heat exchange unit 300 includes a first input channel 310, a first intermediate channel 320, a second intermediate channel 330, and a first output channel 340 connected in sequence. The first input channel 310 and the first output channel 340 are arranged side by side and adjacent to each other, as are the first intermediate channel 320 and the second intermediate channel 330. The first input channel 310 is connected to the first collector 511, and the first output channel 340 is connected to the second collector 512. Specifically, the first heat exchange unit 300 can be a serpentine bend tube structure. The first heat exchange unit 300 can be made of aluminum alloy and manufactured by extrusion molding or bending process. The first input channel 310 and the first output channel 340 are both connected to the first collector 511 and the second collector 512 respectively by welding. The heat exchange medium can enter the first input channel 310, the first intermediate channel 320, the second intermediate channel 330, and the first output channel 340 sequentially through the first collector 511 and then flow into the second collector 512. The first heat exchange unit 300 is installed between the first housing 100 and the battery cell unit 200, and the first input channel 310, the first intermediate channel 320, the second intermediate channel 330, and the first output channel 340 can be arranged along the length direction X.

[0032] Thus, in the scenario of high-rate fast charging of this battery pack, the temperature of the heat exchange medium flowing in the first input channel 310, the first intermediate channel 320, the second intermediate channel 330, and the first output channel 340 increases sequentially. By arranging the first input channel 310, which contains the heat exchange medium with the lowest internal flow temperature, and the first output channel 340, which contains the heat exchange medium with the highest internal flow temperature, side by side and adjacent to each other, and by arranging the first intermediate channel 320, which contains the heat exchange medium with a relatively low internal flow temperature, and the second intermediate channel 330, which contains the heat exchange medium with a relatively high internal flow temperature, side by side and adjacent to each other, the temperatures of the heat exchange medium in different areas of the first heat exchange unit 300 can compensate for each other. This helps to improve the uniformity of the heat exchange capacity in each area of ​​the first heat exchange unit 300 and alleviates the problem of excessive differences in heat exchange and cooling effects in different areas of the cell unit 200 caused by the gradual increase in temperature of the heat exchange medium during its flow in the first heat exchange unit 300.

[0033] It should be noted that a receiving channel 350 is also provided between the first input channel 310 and the first intermediate channel 320. Under the action of the receiving channel 350, the connection between the first input channel 310 and the first intermediate channel 320 is realized.

[0034] In this embodiment, an extension 5111 is provided on the first current collector 511. The extension 5111 is connected to the first current collector 511, and the input end of the first input channel 310 is connected to the first current collector 511 through the extension 5111. The first current collector 511 is connected to the second current collector 512 through the extension 5111. In this way, the first current collector 511 and the second current collector 512 can be staggered in the thickness direction Z, thereby alleviating the problem of heat exchange between the heat exchange medium in the first current collector 511 and the heat exchange medium in the second current collector 512. In addition, by providing the extension 5111, the first input channel 310 and the first output channel 340 can be kept flush in the thickness direction Z, so that the first heat exchange unit 300 can be stably attached to the bottom of the cell unit 200.

[0035] In some embodiments, please refer to Figures 10 to 13The second current collector 520 includes a first current collector channel 521 and a second current collector channel 522. The first current collector channel 521 is arranged side by side, and the input end of the second heat exchange unit 400 is connected to the first current collector channel 521 at a distance, and the output end of the second heat exchange unit 400 is connected to the second current collector channel 522 at a distance. Specifically, the second current collector 520 can be a tubular structure integrally extruded. The tubular second current collector 520 can be sealed with baffles 525, which can be arranged along the extension direction of the first current collector 510. By setting the baffles 525, the first current collector channel 521 and the second current collector channel 522 can be formed inside the second current collector 520. The heat exchange medium that has not exchanged heat with the outer wall of the battery cell unit 200 flows in the first current collector channel 521. The heat exchange medium that has exchanged heat with the outer wall of the battery cell unit 200 flows in the second current collector 512. Furthermore, by connecting the input ends of multiple second heat exchange units 400 to the first collector channel 521 at intervals and connecting the output ends of multiple second heat exchange units 400 to the second collector channel 522 at intervals, it helps to keep the flow resistance in each second heat exchange unit 400 balanced, avoids the problem of uneven flow distribution of heat exchange medium in each first heat exchange unit 300 due to flow resistance differences, and keeps the heat exchange effect of each cell unit 200 in the battery pack balanced.

[0036] In some embodiments, please continue to refer to Figures 10 to 13 The second heat exchange unit 400 includes a second input channel 410 and a second output channel 420 that are interconnected. The second input channel 410 and the second output channel 420 are arranged side by side and adjacent to each other. The second input channel 410 is connected to the first collection channel 521, and the second output channel 420 is connected to the second collection channel 522. Specifically, the second heat exchange unit 400 can be U-shaped. The heat exchange medium can enter the second input channel 410 and the second output channel 420 sequentially through the first collection channel 521 and then flow into the second collection channel 522. The second heat exchange unit 400 is installed in the interval between adjacent cell units 200, and the second input channel 410 and the second output channel 420 can be arranged along the length direction X.

[0037] Thus, in scenarios where the battery pack undergoes high-rate fast charging, the temperature of the heat exchange medium increases sequentially as it flows within the second input channel 410 and the second output channel 420. By arranging the second input channel 410, which contains a heat exchange medium with a low internal flow temperature, and the second output channel 420, which contains a heat exchange medium with a high internal flow temperature, side by side and adjacent to each other, the temperatures of the heat exchange medium in different areas of the second heat exchange unit 400 can compensate for each other. This helps to improve the uniformity of heat exchange capacity in each area of ​​the second heat exchange unit 400 and alleviates the problem of excessive differences in heat exchange and cooling effects in different areas of the cell unit 200 caused by the gradual increase in temperature of the heat exchange medium as it flows within the second heat exchange unit 400.

[0038] In some embodiments, please refer to Figure 2 , Figures 4 to 6 , Figure 10 and Figure 11 The first current collector 510 is provided with a first inlet 513 and a first outlet 514, and the second current collector 520 is provided with a second inlet 523 and a second outlet 524. A first connector 600 is installed between the first inlet 513 and the second inlet 523, and a second connector 610 is installed between the first outlet 514 and the second outlet 524. Specifically, the first inlet 513 is located on the first current collector 511, and the second outlet 524 is located on the second current collector 512. The heat exchange medium can be input into the first current collector 511 through the first inlet 513 to provide the first heat exchange unit 300 with the bottom of the cell unit 200 for heat exchange, and the heat exchange medium in the second current collector 512 can be discharged through the second outlet 524. At the same time, the second inlet 523 is located on the second current collector channel 522, and the second outlet 524 is located on the second current collector channel 522. The heat exchange medium can be input into the second collection channel 522 through the second inlet 523 to provide the second heat exchange unit 400 with the outer wall of the cell unit 200 for heat exchange, and the heat exchange medium in the second collection channel 522 can be discharged through the second outlet 524.

[0039] Furthermore, in this embodiment, both the first connector 600 and the second interface can be tee connectors. The two ends of the first connector 600 can be connected to the first inlet 513 and the second inlet 523, respectively. Through the first connector 600, heat exchange medium can be simultaneously supplied to the first collector 511 and the first collector channel 521, thereby providing the battery pack with heat exchange medium for heat exchange between the bottom and outer wall of the cell unit 200. The two ends of the second connector 610 can be connected to the first outlet 514 and the second outlet 524, respectively. Through the second connector 610, heat exchange medium in the second collector 512 and the second collector channel 522 can be simultaneously discharged from the battery pack. Thus, by allowing the first collector 510 and the second collector 520 to share the first connector 600 and the second connector 610, the pipeline layout for supplying the heat exchange medium in the battery pack can be simplified, reducing pipeline layout costs.

[0040] It should be noted that a plastic hose is provided between the first connector 600 and the first inlet 513 and the second inlet 523, and a plastic hose is also provided between the second connector 610 and the first outlet 514 and the second outlet 524. The first current collector 510 and the second current collector 520 are located at the same end of the battery pack in the length direction X. This shortens the distance between the first inlet 513 and the second inlet 523, and between the first outlet 514 and the second outlet 524, reducing the length of the plastic hose and simplifying the wiring layout within the battery pack.

[0041] In some embodiments, please refer to Figures 2 to 5 The battery pack also includes a positioning frame 700, which is disposed within the first housing 100 and the second housing 110 to position a plurality of battery cell units 200 within the first housing 100 and the second housing 110. Specifically, the positioning frame 700 can divide the interior of the first housing 100 and the second housing 110 into multiple regions, each region can hold multiple battery cell units 200, and the multiple battery cell units 200 in adjacent regions can be separated from each other, improving the stability of the battery cell units 200 within the first housing 100 and the second housing 110.

[0042] In some embodiments, please Figures 2 to 5 Further reference Figure 14 The positioning frame 700 includes a first beam 710, a second beam 720, a third beam 730, and a fourth beam 740. The second beam 720 intersects the first beam 710 at its middle, and the third beam 730 and fourth beam 740 are located at the ends of the first beam 710. Specifically, the first beam 710, second beam 720, third beam 730, and fourth beam 740 are all hollow structures, which reduces the overall weight of the positioning frame 700 and prevents the battery pack from becoming too heavy. The first beam 710 can be arranged along the length direction X within the first housing 100 and the second housing 110, and the second beam 720, third beam 730, and fourth beam 740 can be arranged along the width direction Y within the first housing 100 and the second housing 110. The combined shape of the first beam 710 and the second beam 720 can be cross-shaped. The second beam 720 can intersect the first beam 710 at or near the midpoint of its extension direction X. This divides the first housing 100 and the second housing 110 into four regions of equal or approximately equal area, allowing for the arrangement of an equal or nearly equal number of battery cell units 200 within these four regions, resulting in a more balanced weight distribution across the battery pack. Furthermore, the third beam 730 and the fourth beam 740 are located at the ends of the first housing 100 and the second housing 110 along the length direction X, respectively. These beams separate the battery cell units 200 from the ends of the first housing 100 and the second housing 110, preventing direct contact and improving the stability of the battery cell units 200 within the battery pack.

[0043] It should be noted that the first beam 710 has a first slot 711 at or near the midpoint of its length direction X, and the second beam 720 has a second slot 723 at or near the midpoint of its width direction Y. The first slot 711 and the second slot 723 can engage with each other. Through the provided first slot 711 and second slot 723, the first beam 710 and the second beam 720 can intersect each other to form a cross-shaped structure.

[0044] In some embodiments, please refer to Figures 2 to 5 as well as Figure 14 The second beam 720 is provided with first clearance portions 721 at intervals to allow the second heat exchange units 400 to pass through it. Specifically, the first clearance portion 721 is a groove formed on the second beam 720, and the distance between adjacent grooves is equal to the distance between adjacent second heat exchange units 400, allowing each second heat exchange unit 400 to pass through the groove and preventing the second beam 720 from interfering with the arrangement of the second heat exchange units 400. Furthermore, the width of the first clearance portion 721 is not less than the thickness of the second heat exchange unit 400, ensuring that the second heat exchange unit 400 can smoothly pass through the first clearance portion 721.

[0045] It should be noted that a second clearance portion 722 is provided at the location corresponding to the first beam 710 on the second beam 720. The width of the second clearance portion 722 is greater than the width of the first clearance portion 721, and the width of the second clearance portion 722 matches the thickness of the first beam 710 in the width direction Y and the thickness of the two second heat exchange units 400. Thus, after the first beam 710 and the second beam 720 are intersected, a second heat exchange unit 400 can be arranged on both sides of the second clearance portion 722 located on the first beam 710, thereby enabling heat exchange on the outer walls of the battery cell units 200 on both sides of the first beam 710.

[0046] Furthermore, the third beam 730 is located between the first heat exchange unit 300 and the second current collector 520 to support the second current collector 520. Specifically, the third beam 730 and the second current collector 520 are located at the same end of the first housing 100 and the second housing 110, so that the third beam 730 can correspond to the position of the second current collector 520, thereby supporting the second current collector 520, ensuring that the second heat exchange unit 400 and the first heat exchange unit 300 are separated from each other, and allowing the second heat exchange unit 400 to be closer to the upper middle part of the outer wall of the cell unit 200, ensuring the heat exchange effect on the upper middle part of the cell unit 200, and preventing the generation of heat dissipation blind spots in the upper middle part of the cell unit 200.

[0047] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0048] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0049] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0050] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery pack, characterized in that, include: First housing (100); The second housing (110) covers the first housing (100). A plurality of battery cell units (200) are spaced apart within the first housing (100) and the second housing (110), and the plurality of battery cell units (200) are electrically connected to each other; A first heat exchange unit (300) is disposed between the battery cell unit (200) and the first housing (100), and the first heat exchange unit (300) is configured to exchange heat with the bottom of the battery cell unit (200); The second heat exchange unit (400) is disposed in the interval between adjacent battery cells (200), and the second heat exchange unit (400) is configured to exchange heat with the outer wall of the battery cell (200); A heat exchange unit (500) is disposed within the first housing (100) and the second housing (110), and the heat exchange unit (500) is configured to circulate heat exchange media with the first heat exchange unit (300) and the second heat exchange unit (400), respectively.

2. The battery pack according to claim 1, characterized in that, The collector unit (500) includes a first collector (510) and a second collector (520). The first collector (510) is used to circulate the heat exchange medium with the first heat exchange unit (300), and the second collector (520) is used to circulate the heat exchange medium with the second heat exchange unit (400).

3. The battery pack according to claim 2, characterized in that, The first collector (510) includes a first collector section (511) and a second collector section (512). The first collector section (511) and the second collector section (512) are arranged side by side. The input end of the first heat exchange unit (300) is connected to the first collector section (511) at a distance, and the output end of the first heat exchange unit (300) is connected to the second collector section (512) at a distance.

4. The battery pack according to claim 3, characterized in that, The first heat exchange unit (300) includes a first input channel (310), a first intermediate channel (320), a second intermediate channel (330) and a first output channel (340) connected in sequence. The first input channel (310) and the first output channel (340) are arranged side by side and adjacent to each other. The first intermediate channel (320) and the second intermediate channel (330) are arranged side by side and adjacent to each other. The first input channel (310) is connected to the first collection section (511) and the first output channel (340) is connected to the second collection section (512).

5. The battery pack according to claim 2, characterized in that, The second collector (520) includes a first collector channel (521) and a second collector channel (522). The first collector channel (521) and the second collector channel (522) are arranged side by side. The input end of the second heat exchange unit (400) is connected to the first collector channel (521) at an interval, and the output end of the second heat exchange unit (400) is connected to the second collector channel (522) at an interval.

6. The battery pack according to claim 5, characterized in that, The second heat exchange unit (400) includes a second input flow channel (410) and a second output flow channel (420) that are interconnected. The second input flow channel (410) and the second output flow channel (420) are arranged side by side and adjacent to each other. The second input flow channel (410) is connected to the first collection channel (521), and the second output flow channel (420) is connected to the second collection channel (522).

7. The battery pack according to claim 2, characterized in that, The first current collector (510) is provided with a first inlet (513) and a first outlet (514), the second current collector (520) is provided with a second inlet (523) and a second outlet (524), a first connector (600) is installed between the first inlet (513) and the second inlet (523), and a second connector (610) is installed between the first outlet (514) and the second outlet (524).

8. The battery pack according to claim 2, characterized in that, The battery pack also includes a positioning frame (700), which is disposed within the first housing (100) and the second housing (110) to position a plurality of the battery cell units (200) within the first housing (100) and the second housing (110).

9. The battery pack according to claim 8, characterized in that, The positioning frame (700) includes a first beam (710), a second beam (720), a third beam (730) and a fourth beam (740), wherein the second beam (720) intersects the middle of the first beam (710), and the third beam (730) and the fourth beam (740) are respectively located at the ends of the first beam (710).

10. The battery pack according to claim 9, characterized in that, The second beam (720) is provided with a first clearance portion (721) at intervals, so that the second heat exchange unit (400) can pass through the second beam (720); and / or, The third beam (730) is located between the first heat exchange unit (300) and the second collector (520) to support the second collector (520).

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