A solid-state battery pack heat dissipation structure

Abstract

The present invention relates to the field of battery thermal management technology, and specifically to a solid-state battery pack heat dissipation structure, which includes a shell and a heat dissipation pipe, and the solid-state battery pack is inserted in the shell; the heat dissipation pipe is a wavy structure, and there are multiple heat dissipation pipes, which are inserted in parallel between adjacent rows of battery cells; the heat dissipation pipe has multiple fixed pipe sections and rotating pipe section groups arranged alternately along the extension direction of the heat dissipation pipe, each rotating pipe section group includes a rotating pipe section, and the rotating pipe section can rotate, and the fixed pipe sections and rotating pipe section groups of adjacent heat dissipation pipes are correspondingly arranged and clamped on both sides of the same battery cell respectively; the first end of the heat dissipation pipe can receive coolant from the outside, and the second end can discharge the coolant to absorb the heat generated by the battery cell through the coolant. When any battery cell is damaged, due to the sliding friction between the battery cell and the rotating pipe section, the damaged battery cell can be easily taken out, which is conducive to improving the convenience during use.

Description

Technical Field

[0001] The present invention relates to the technical field of battery thermal management, and in particular to a solid-state battery pack heat dissipation structure. Background Art

[0002] Solid-state batteries are a new type of lithium-ion battery technology that uses solid electrolytes instead of traditional liquid electrolytes. They have significant advantages such as high energy density, high safety and long cycle life, and have broad application prospects in new energy vehicles and energy storage fields.

[0003] Since solid-state battery packs generate heat during the charging and discharging process, if this heat cannot be discharged in time, the temperature of the solid-state battery pack will be too high. High temperature will reduce the electrochemical properties of the solid-state battery pack, affecting its capacity and output power, and may even cause safety problems such as thermal runaway, short circuit or overcharging. Therefore, in order to ensure the normal use of the solid-state battery pack, a heat dissipation structure is required to dissipate the heat of the solid-state battery pack in time.

[0004] In the related technology, for example, Chinese patent CN218896706U discloses a rapid heat dissipation device for a battery pack with thermal runaway. When in use, the rapid heat dissipation device for a battery pack with thermal runaway is provided with a wavy arc segment on the heat dissipation branch pipe, so that the upper and lower outer circular surfaces of each single cylindrical lithium battery cell are in sleeve contact with the wavy arc surface, thereby expanding the contact area between the heat dissipation branch pipe and the cylindrical lithium battery cell. Circulating cooling water is introduced into the heat dissipation branch pipe, and the cooling water exchanges heat with the cylindrical lithium battery cell, which can quickly take away the heat generated by the thermal runaway of the single cylindrical lithium battery cell, effectively preventing the heat generated by the thermal runaway from spreading to the surrounding area, causing the serious situation of fire and explosion of the battery pack, and can also quickly dissipate the high temperature generated by the normal operation of the battery pack.

[0005] Although the above-mentioned battery pack thermal runaway rapid heat dissipation device can achieve heat dissipation for the solid-state battery pack, it is found in actual use that when any solid-state battery is damaged, the damaged solid-state battery needs to be replaced. At this time, due to the close contact between the wavy arc segment and the solid-state battery, it is difficult to remove the damaged solid-state battery, which causes trouble during replacement. Summary of the invention

[0006] Based on this, it is necessary to provide a solid-state battery pack heat dissipation structure to address the inconvenience of using the current battery heat dissipation structure during use.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A solid-state battery pack heat dissipation structure, the solid-state battery pack heat dissipation structure is used to dissipate heat for the solid-state battery pack, the solid-state battery pack comprises a plurality of rows of battery cells, the plurality of rows of battery cells are electrically connected in series and parallel, and the battery cells in adjacent rows are arranged in a staggered manner; the solid-state battery pack heat dissipation structure comprises:

[0009] A housing, wherein the solid-state battery pack is inserted into the housing during installation;

[0010] A heat dissipation pipe, wherein the heat dissipation pipe is of a wavy structure, and there are multiple heat dissipation pipes, which are inserted in parallel between adjacent rows of battery cells; the heat dissipation pipe has multiple fixed pipe sections and multiple rotating pipe section groups, each of the rotating pipe section groups includes at least one rotating pipe section, and the rotating pipe section can rotate, and the fixed pipe sections and the rotating pipe section groups are alternately arranged along the extension direction of the heat dissipation pipe, and the fixed pipe sections and the rotating pipe section groups of adjacent heat dissipation pipes are correspondingly arranged and respectively clamped on both sides of the same battery cell; the first end of the heat dissipation pipe can receive coolant from the outside, and the second end can discharge the coolant to absorb the heat generated by the battery cell through the coolant.

[0011] Furthermore, the rotating tube section is elastic.

[0012] Furthermore, the solid-state battery pack heat dissipation structure also includes a plurality of rotating rods, which extend along the extension direction of the battery core and are located between the corresponding fixed pipe sections and the rotating pipe section group of adjacent heat dissipation tubes, or between the heat dissipation tubes and the side walls of the outer shell, and are capable of rotating; each of the rotating rods is provided with a plurality of sliding protrusions, which are arranged circumferentially and are capable of elastically sliding along the radial direction of the rotating rod to continuously press the rotating pipe section.

[0013] Furthermore, the solid-state battery pack heat dissipation structure also includes a transmission assembly, and the transmission assembly is configured to drive the rotating rod to rotate.

[0014] Furthermore, the transmission assembly includes a plurality of rotating shafts, which extend along the extension direction of the heat dissipation tube, are located between adjacent rows of the battery cells, and are capable of rotating; an impeller and a plurality of first bevel gears are fixedly sleeved on each of the rotating shafts; the impeller can drive the rotating shaft to rotate under the push of the coolant; a second bevel gear is fixedly sleeved on each of the rotating rods, and the second bevel gears on the plurality of rotating rods in the same row are respectively meshed with the plurality of first bevel gears on the same rotating shaft.

[0015] Furthermore, there are multiple heat dissipation tubes between adjacent rows of the battery cells, and the heat dissipation tubes are arranged in parallel along the extension direction of the battery cells.

[0016] Furthermore, the fixed tube segments and the rotating tube segment groups of the heat dissipation tubes in the same row are alternately arranged along the extension direction of the battery core.

[0017] Furthermore, the shell is a split structure.

[0018] Furthermore, the solid-state battery pack heat dissipation structure also includes a ventilation member, and the ventilation member is configured to increase the air flow rate in the housing.

[0019] Furthermore, when the battery core is a cylindrical structure, the heat dissipation tube is a strip-shaped structure, and the strip surface of the heat dissipation tube is in contact with the circumferential side wall of the battery core.

[0020] The beneficial effects of the present invention are:

[0021] During use, the solid-state battery pack heat dissipation structure of the present invention firstly puts the solid-state battery pack into a shell, and then inserts the heat dissipation tube from top to bottom in parallel between the adjacent rows of battery cells. Due to the rotating arrangement of the rotating tube section, when the heat dissipation tube is inserted from top to bottom, the friction form between the heat dissipation tube and the battery cell is rolling friction plus sliding friction, thereby reducing the friction resistance between the heat dissipation tube and the battery cell, which is beneficial to improving the labor saving and simplicity when installing the heat dissipation tube; when the battery cell is in a charging and discharging state, the coolant is passed into the heat dissipation tube through the first end of the heat dissipation tube, so that the coolant flows along the extension direction of the heat dissipation tube while absorbing the heat of the battery cell to prevent the battery cell from having a high temperature, and the coolant is finally discharged from the second end of the heat dissipation tube; when any battery cell is damaged, the battery cell is pulled out from the shell from bottom to top. Due to the rotating arrangement of the rotating tube section, when the battery cell is pulled out, the friction form between the heat dissipation tube and the battery cell is rolling friction plus sliding friction, thereby reducing the friction resistance between the heat dissipation tube and the battery cell, which is beneficial to improving the labor saving and simplicity when disassembling the battery cell.

[0022] Furthermore, by setting the rotating tube section to be elastic, when in use, on the one hand, the stability of clamping is ensured through the clamping cooperation between the rotating tube section and the fixed tube section; on the other hand, the rigid clamping of the battery cell is avoided through the elastic deformation of the rotating tube section.

[0023] Furthermore, by providing a rotating rod, when in use, the rotation of the rotating rod drives multiple sliding protrusions to continuously press the rotating pipe section, thereby increasing the flow rate of the coolant in the heat dissipation pipe, thereby facilitating improving the heat dissipation efficiency of the battery cell.

[0024] Furthermore, by arranging the fixed tube sections and the rotating tube section groups of the heat dissipation tubes in the same row alternately along the extension direction of the battery cell, when in use, the same battery cell can be simultaneously subjected to the elastic clamping force of the rotating tube section groups from multiple directions, thereby helping to improve the stability and shock resistance of the battery cell when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a solid-state battery pack heat dissipation structure and a solid-state battery pack assembled according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the front view of the solid-state battery pack heat dissipation structure and the solid-state battery pack when assembled provided by an embodiment of the present invention;

[0027] Figure 3 for Figure 2 Middle AA section view;

[0028] Figure 4 A schematic diagram of a solid-state battery pack heat dissipation structure and a side view of a solid-state battery pack during assembly provided by an embodiment of the present invention;

[0029] Figure 5 for Figure 4 Middle BB section view;

[0030] Figure 6 for Figure 4 Middle CC section view;

[0031] Figure 7 for Figure 6 The schematic diagram of the local enlarged structure at D in the middle;

[0032] Figure 8 Schematic diagram of the solid-state battery pack heat dissipation structure and the parts decomposition during assembly of the solid-state battery pack provided by the embodiment of the present invention Figure 1 ;

[0033] Fig. 9 Schematic diagram of the solid-state battery pack heat dissipation structure and the parts decomposition during assembly of the solid-state battery pack provided by the embodiment of the present invention Figure 2 ;

[0034] Fig.10 for Fig. 9 The schematic diagram of the local enlarged structure at E in the middle;

[0035] Fig.11 A schematic diagram of the exploded parts of a heat dissipation tube of a solid-state battery pack heat dissipation structure provided in an embodiment of the present invention.

[0036] in:

[0037] 1. Shell; 11. Bottom box; 1101. Through hole; 1102. First mounting slot; 1103. Second mounting slot; 1104. Third mounting slot; 12. Top cover;

[0038] 2. heat dissipation pipe; 21. fixed pipe section; 22. rotating pipe section; 221. base pipe; 222. connecting pipe; 223. tight hoop;

[0039] 3. Rotating rod; 31. Sliding protrusion; 32. Stop ring;

[0040] 41. rotating shaft; 42. impeller; 43. first bevel gear; 44. second bevel gear;

[0041] 5. Liquid cooling box; 501. Arc groove; 502. Fourth mounting groove; 51. Liquid inlet pipe; 52. Baffle;

[0042] 6. Battery cell. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] like Figures 1 to 11As shown, the solid-state battery pack heat dissipation structure provided in the embodiment of the present invention is used to dissipate heat for the solid-state battery pack, the solid-state battery pack includes a plurality of rows of battery cells 6, the plurality of rows of battery cells 6 are electrically connected in series and parallel, and the battery cells 6 in adjacent rows are arranged in an alternating manner; the solid-state battery pack heat dissipation structure is configured to include a shell 1 and a heat dissipation tube 2, and the solid-state battery pack is inserted into the shell 1 when installed; the heat dissipation tube 2 is a wavy structure, and there are multiple heat dissipation tubes 2, and they are inserted in parallel between the battery cells 6 in adjacent rows; the heat dissipation tube 2 has a plurality of fixed tube segments 21 and a plurality of rotating tube segment groups, each rotating tube segment group includes at least one rotating tube segment 22, and the rotating tube segment 22 can rotate, the fixed tube segments 21 and the rotating tube segment groups are alternately arranged along the extension direction of the heat dissipation tube 2, and the fixed tube segments 21 and the rotating tube segment groups of adjacent heat dissipation tubes 2 are correspondingly arranged and are respectively clamped on both sides of the same battery cell 6; the first end of the heat dissipation tube 2 can receive cooling liquid from the outside, and the second end can discharge the cooling liquid to absorb the heat generated by the battery cell 6 through the cooling liquid.

[0047] Specifically in this embodiment, Figure 1 As shown, the housing 1 is configured as a box structure and is disposed horizontally when in use; Figure 6 As shown, the solid-state battery pack can be configured to include nine rows of battery cells 6, and the nine rows of battery cells 6 are arranged side by side along the width direction of the outer shell 1, and the battery cells 6 in the same row are arranged at intervals along the length direction of the outer shell 1, wherein the number of battery cells 6 in odd-numbered rows can be set to seven, and the same battery cells 6 counted from left to right in different odd-numbered rows are arranged side by side and at equal intervals along the width direction of the outer shell 1, the number of battery cells 6 in even-numbered rows can be set to six, and the same battery cells 6 counted from left to right in different even-numbered rows are arranged side by side and at equal intervals along the width direction of the outer shell 1, and the battery cells 6 in odd-numbered rows and even-numbered rows are staggered.

[0048] The number of heat dissipation tubes 2 can be set to eight, and they are respectively inserted between adjacent rows of battery cells 6. The heat dissipation tubes 2 extend along the length direction of the housing 1 to be arranged parallel to the battery cells 6 in the same row; Fig.11 As shown, the fixed pipe segment 21 is configured as an integral structure; the rotating pipe segment group can be configured to include five rotating pipe segments 22, and are arranged at intervals along the extension direction of the battery cell 6; the rotating pipe segment 22 is configured to be composed of a base tube 221, two connecting tubes 222 and two tightening hoops 223, the two connecting tubes 222 are respectively inserted at both ends of the base tube 221, and are both connected to the base tube 221, the suspended end of the connecting tube 222 is inserted at the end of the fixed pipe segment 21, and can be rotated and connected to the fixed pipe segment 21; the tightening hoop 223 is configured as an annular structure, and can shrink and expand, and is jointly sleeved on the outside of the base tube 221 and the connecting tube 222 during installation to fix the connecting tube 222 on the base tube 221.

[0049] It is understandable that the rotating tube segment group can be provided to include a larger number of rotating tube segments 22 so that the sum of the surface accumulations of these rotating tube segments 22 gradually increases, thereby increasing the contact area between the air in the housing 1 and the heat dissipation tube 2, thereby improving the heat dissipation efficiency of the battery cell 6.

[0050] like Figure 6 As shown, taking the second-to-last row of battery cells 6 as an example, the heat dissipation tube 2 above the battery cells 6 in this row is configured such that the fixed tube segment 21 is a relatively convex portion, the rotating tube segment group is a relatively concave portion, and when viewed from left to right, the fixed tube segment 21 and the rotating tube segment group are alternately arranged; the heat dissipation tube 2 below the battery cells 6 in this row is configured such that the fixed tube segment 21 is a relatively convex portion, the rotating tube segment group is a relatively concave portion, and when viewed from left to right, the rotating tube segment group and the fixed tube segment 21 are alternately arranged; and the fixed tube segment 21 of the heat dissipation tube 2 above the battery cells 6 in this row and the rotating tube segment group of the heat dissipation tube 2 below the battery cells 6 in this row are clamped together on the upper and lower sides of the same battery cell 6.

[0051] In order to facilitate the flow of coolant into the heat dissipation pipe 2, two liquid cooling boxes 5 are inserted into the housing 1. Figure 6 As shown, two liquid cooling boxes 5 are arranged at intervals along the length direction of the shell 1 and are respectively located at two ends of the shell 1; Figure 8 As shown, the liquid cooling box 5 is vertically arranged during installation, and the length direction of the liquid cooling box 5 is parallel to the width direction of the outer shell 1, a liquid inlet pipe 51 is vertically arranged on the side wall surface of one of the liquid cooling boxes 5, and a liquid outlet pipe is vertically arranged on the side wall surface of the other liquid cooling box 5, and the liquid inlet pipe 51 and the liquid outlet pipe both pass through the long side wall surface of the outer shell 1.

[0052] To facilitate installation of the liquid cooling box 5, Figure 8 As shown, two first installation grooves 1102 are symmetrically provided on the inner side walls of the two short sides of the shell 1 , and the first installation grooves 1102 extend along the short side direction of the shell 1 . The liquid cooling box 5 is inserted into the first installation grooves 1102 during installation.

[0053] More specifically, in order to facilitate the filling of coolant into the liquid cooling box 5, the solid-state battery pack heat dissipation structure is configured to also include a liquid pump and a liquid storage tank, in which coolant is stored; the liquid pump end of the liquid pump is connected to the liquid inlet pipe 51, and the liquid extraction end is connected to the liquid storage tank; the liquid outlet pipe is connected to the liquid storage tank, so as to facilitate the transportation of the heated coolant into the liquid storage tank.

[0054] It will be appreciated that the coolant may be water.

[0055] During use, first place the solid-state battery pack as follows Figure 6The layout shown is placed in the housing 1, and then the heat dissipation tube 2 is inserted parallel to each other from top to bottom between the adjacent rows of battery cells 6. Due to the rotating arrangement of the rotating tube section 22, when the heat dissipation tube 2 is inserted from top to bottom, the friction between the heat dissipation tube 2 and the battery cell 6 is in the form of rolling friction plus sliding friction, thereby reducing the friction resistance between the heat dissipation tube 2 and the battery cell 6, which is conducive to improving the labor saving and simplicity when installing the heat dissipation tube 2; when the battery cell 6 is in the charging and discharging state, the liquid pump is started, and the liquid pump sends the coolant in the liquid storage tank into the heat dissipation tube 2 through the liquid inlet pipe 51, so that the cooling The liquid flows along the extension direction of the heat dissipation tube 2 while absorbing the heat of the battery cell 6 to prevent the battery cell 6 from overheating, and is finally discharged from the second end of the heat dissipation tube 2 into the liquid storage tank through the liquid outlet pipe; when any battery cell 6 is damaged, the battery cell 6 is pulled out from the housing 1 from bottom to top. Due to the rotating setting of the rotating tube section 22, when the battery cell 6 is pulled out, the friction between the heat dissipation tube 2 and the battery cell 6 is in the form of rolling friction plus sliding friction, thereby reducing the friction resistance between the heat dissipation tube 2 and the battery cell 6, which is conducive to improving the labor saving and simplicity when removing the battery cell 6.

[0056] In a further embodiment, the rigid clamping of the battery core 6 by the fixed tube segment 21 and the rotating tube segment 22 may easily cause the battery core 6 to deform, thereby affecting the performance of the battery core 6. To solve this problem, the rotating tube segment 22 is configured to be elastic.

[0057] Specifically in this embodiment, it can be arranged that the base tube 221 and the connecting tube 222 are both made of elastic materials, such as rubber, so that when the heat dissipation tube 2 is inserted from top to bottom, the base tube 221 and the connecting tube 222 can be elastically deformed at the same time under the push of the battery cell 6, so as to elastically clamp the battery cell 6 together through the fixed tube section 21.

[0058] In order to avoid affecting the rotational connection between the connecting tube 222 and the fixed tube section 21, and because the base tube 221 is the main part for clamping the battery cell 6, it can also be arranged that only the base tube 221 is made of an elastic material, such as rubber, so that when the heat dissipation tube 2 is inserted from top to bottom, the base tube 221 can be elastically deformed under the push of the battery cell 6 to elastically clamp the battery cell 6 through the fixed tube section 21, and can also drive the connecting tube 222 to rotate, so as to achieve rolling friction contact between the base tube 221 and the battery cell 6.

[0059] In a further embodiment, although the wavy heat dissipation tube 2 can increase the contact area with the battery cell 6, it also increases the heat dissipation path, thereby increasing the temperature difference at both ends of the heat dissipation tube 2, so that there is a large temperature gradient in the middle of the battery cell 6, thereby affecting the heat dissipation effect of the battery cell 6. To solve this problem, the solid-state battery pack heat dissipation structure is configured to also include a plurality of rotating rods 3, which extend along the extension direction of the battery cell 6 and are located between the corresponding fixed tube segments 21 and the rotating tube segment group of adjacent heat dissipation tubes 2, or between the heat dissipation tube 2 and the side wall of the outer shell 1, and can rotate; each rotating rod 3 is provided with a plurality of sliding protrusions 31, which are arranged circumferentially and can elastically slide along the radial direction of the rotating rod 3 to continuously press the rotating tube segment 22.

[0060] Specifically in this embodiment, Fig. 9 As shown, the rotating rod 3 is configured as a round rod structure and is vertically placed inside the housing 1 during installation; in order to facilitate the installation of the rotating rod 3, as shown in FIG. Figure 8 As shown, a second installation groove 1103 is vertically opened on the inner bottom wall of the housing 1, and the bottom end of the rotating rod 3 is rotated and inserted into the second installation groove 1103 during installation; Figure 6 As shown, the number of rotating rods 3 can be set to fifty and divided into nine rows, wherein the rotating rods 3 of the odd-numbered rows and the battery cells 6 of the odd-numbered rows are arranged in parallel, and the number of rotating rods 3 of the odd-numbered rows can be set to six, and they are respectively located between adjacent battery cells 6 of the odd-numbered rows, and between the corresponding fixed tube segments 21 and the rotating tube segment group of the heat dissipation tubes 2 adjacent to the battery cells 6 of the odd-numbered rows, or between the heat dissipation tubes 2 and the inner side wall where the long sides of the shell 1 are located; the rotating rods 3 of the even-numbered rows and the battery cells 6 of the even-numbered rows are arranged in parallel, and the number of rotating rods 3 of the even-numbered rows can be set to five, and they are respectively located between adjacent battery cells 6 of the even-numbered rows, and between the corresponding fixed tube segments 21 and the rotating tube segment group of the heat dissipation tubes 2 adjacent to the battery cells 6 of the even-numbered rows.

[0061] like Fig.10 As shown, the sliding protrusion 31 is configured as a strip structure and extends along the axial direction of the rotating rod 3. The number of the sliding protrusions 31 on the same rotating rod 3 can be four and are evenly arranged along the circumferential direction. In order to facilitate the elastic sliding of the sliding protrusion 31, four compression springs are also connected to each rotating rod 3. The compression springs extend along the radial direction of the rotating rod 3 and are connected between the rotating rod 3 and the sliding protrusion 31. Under the action of the compression springs, the sliding protrusion 31 has a tendency to move away from the rotating rod 3.

[0062] During use, if Figure 6As shown, the coolant flows from right to left as an example; taking the second-to-last row of battery cells 6 as an example, when the battery cells 6 are in the charge and discharge state, the rotating rod 3 is driven to rotate counterclockwise; during the rotation of the rotating rod 3 in the counterclockwise direction, the sliding protrusion 31 rotates synchronously with the rotating rod 3 in the counterclockwise direction; when the sliding protrusion 31 contacts the base tube 221, as the rotating rod 3 rotates, the sliding protrusion 31 moves radially inward under the push of the base tube 221, and while compressing the compression spring, the base tube 221 is compressed synchronously, so that the base tube 221 is pressed downward. The coolant moves from right to left, thereby improving the heat dissipation efficiency of the battery cell 6 by increasing the flow rate of the coolant in the heat dissipation tube 2; when the sliding protrusion 31 passes over the base tube 221, the sliding protrusion 31 automatically resets under the action of the compression spring, and the base tube 221 automatically resets under the action of its own elasticity. Since there are four sliding protrusions 31, during the process of the rotating rod 3 rotating one circle, the sliding protrusion 31 can continuously press the base tube 221 four times in total, so that the coolant in the base tube 221 can be accelerated four times to move from right to left.

[0063] When the sliding protrusion 31 contacts the fixed pipe section 21, as the rotating rod 3 rotates, the sliding protrusion 31 moves radially inward under the push of the fixed pipe section 21 and simultaneously compresses the compression spring to avoid interference; when the sliding protrusion 31 passes over the fixed pipe section 21, the sliding protrusion 31 automatically resets under the action of the compression spring.

[0064] In a further embodiment, in order to facilitate the rotation of the rotating rod 3 , the solid-state battery pack heat dissipation structure is configured to also include a transmission component, and the transmission component is configured to be able to drive the rotating rod 3 to rotate.

[0065] Specifically in this embodiment, the transmission assembly is configured to include multiple rotating shafts 41, which extend along the extension direction of the heat dissipation tube 2, are located between adjacent rows of battery cells 6, and are capable of rotating; an impeller 42 and multiple first bevel gears 43 are fixedly sleeved on each rotating shaft 41; the impeller 42 can drive the rotating shaft 41 to rotate under the push of the coolant; a second bevel gear 44 is fixedly sleeved on each rotating rod 3, and the second bevel gears 44 on the multiple rotating rods 3 in the same row are respectively meshed with the multiple first bevel gears 43 on the same rotating shaft 41.

[0066] like Figure 5 As shown, the rotating shaft 41 is horizontally placed at the bottom of the housing 1 during installation, and the axis extends along the length direction of the housing 1. The two ends of the rotating shaft 41 are respectively inserted into the two liquid cooling boxes 5. To facilitate the installation of the rotating shaft 41, a third installation groove 1104 is opened inside the bottom of the housing 1. The third installation groove 1104 extends along the length direction of the housing 1. The rotating shaft 41 is inserted parallel to the third installation groove 1104 during installation. Figure 8As shown, in order to facilitate the insertion of the rotating shaft 41, a plurality of fourth mounting grooves 502 are provided on the inner long side wall surface of the liquid cooling box 5, near the bottom. The plurality of fourth mounting grooves 502 are arranged at intervals along the length direction of the liquid cooling box 5, and are all connected to the liquid cooling box 5. When installing, the end of the rotating shaft 41 passes through the fourth mounting groove 502 and is inserted into the interior of the liquid cooling box 5.

[0067] The number of rotating shafts 41 can be nine, and they are arranged at intervals along the width direction of the housing 1 and are respectively located below the same row of battery cells 6; accordingly, the number of third mounting grooves 1104 is nine, and they are arranged at equal intervals along the width direction of the housing 1; the number of fourth mounting grooves 502 is nine, and they are arranged at equal intervals along the length direction of the liquid cooling box 5; the number of impellers 42 is nine, and they are fixedly sleeved on the end of the rotating shaft 41 and inserted into the liquid cooling box 5; in order to facilitate the installation of the impeller 42, as shown in Figure 3 As shown, nine arc grooves 501 are opened at the bottom of the liquid cooling box 5, and the nine arc grooves 501 are arranged at equal intervals along the length direction of the liquid cooling box 5, and the axis of the arc groove 501 is perpendicular to the length direction of the liquid cooling box 5, and the impeller 42 is inserted into the arc groove 501 during installation; wherein the number of the first bevel gears 43 on the rotating shaft 41 corresponding to the rotating rods 3 in odd rows is set to six, and the number of the first bevel gears 43 on the rotating shaft 41 corresponding to the rotating rods 3 in even rows is set to five.

[0068] In order to improve the transmission stability between the first bevel gear 43 and the second bevel gear 44, a retaining ring 32 is fixedly sleeved on the rotating rod 3 and is arranged near the bottom end of the rotating rod 3, such as Figure 5 As shown, the stop ring 32 is stopped on the top surface of the bottom of the housing 1 during installation, so that the rotating rod 3 has a certain position, and thus the position of the second bevel gear 44 is determined.

[0069] In order to improve the rotation efficiency of the impeller 42 driven by the coolant, Figure 3 and Figure 5 As shown, a baffle 52 is horizontally placed inside the liquid cooling box 5. The baffle 52 is arranged in a strip structure and extends along the length direction of the liquid cooling box 5. The left end of the baffle 52 is suspended, and the right end is vertically arranged on the inner wall of the short side of the liquid cooling box 5. The baffle 52 divides the interior of the liquid cooling box 5 into an upper half area and a lower half area, and the upper half area is connected to the heat dissipation pipe 2, and the lower half area is connected to the liquid inlet pipe 51.

[0070] When the battery cell 6 is in the charge and discharge state, the liquid pump is started, and the liquid pump delivers the coolant in the liquid storage tank into the lower half of the liquid cooling box 5 through the liquid inlet pipe 51. Under the impact of the coolant, the impeller 42 rotates, and the impeller 42 synchronously drives the rotating shaft 41 to rotate. The rotating shaft 41 drives the rotating rod 3 to rotate through the engagement between the first bevel gear 43 and the second bevel gear 44.

[0071] In other embodiments, the transmission assembly can also be configured to include fifty drive motors, which are inserted into the bottom of the outer shell 1 during installation, and the motor shaft of the drive motor extends in the vertical direction and is coaxially and fixedly connected to the bottom end of the rotating rod 3 to drive the rotating rod 3 to rotate.

[0072] In other embodiments, in order to further improve the heat dissipation uniformity of the battery cells 6 , there are multiple heat dissipation tubes 2 between adjacent rows of battery cells 6 , and the heat dissipation tubes 2 are arranged in parallel along the extension direction of the battery cells 6 .

[0073] Specifically in this embodiment, Fig. 9 As shown, the number of heat dissipation tubes 2 between adjacent rows of battery cells 6 can be set to three, so that when in use, the heat generated by the battery cells 6 in the same row can be absorbed simultaneously by the three heat dissipation tubes 2 in the same column, while more effectively dissipating the heat inside the solid-state battery pack, and improving the uniformity of the temperature distribution of the coolant in the heat dissipation tubes 2, thereby reducing the temperature gradient between the battery cells 6.

[0074] More specifically, in order to ensure that the sliding protrusions 31 can squeeze the rotating tube sections 22 of the three heat dissipation tubes 2 in the same row, three groups of sliding protrusions 31 are arranged on each rotating rod 3, and the three groups of sliding protrusions 31 are arranged at intervals along the axial direction and are respectively arranged corresponding to the three heat dissipation tubes 2 in the same row. Each group includes four sliding protrusions 31, and the sliding protrusions 31 are connected to the rotating rod 3 through compression springs.

[0075] In a further embodiment, in order to improve the stability of the battery core 6 , the fixed tube segments 21 and the rotating tube segment groups of the heat dissipation tubes 2 in the same row are alternately arranged along the extension direction of the battery core 6 .

[0076] Specifically in this embodiment, Fig. 9 As shown, taking a row of heat pipes 2 located on the upper side as an example, for the heat pipes 2 located at the top and the bottom, the rotating pipe segment groups and the fixed pipe segments 21 are arranged alternately from left to right; for the heat pipes 2 located in the middle, the fixed pipe segments 21 and the rotating pipe segment groups are arranged alternately from left to right.

[0077] During use, the same battery cell 6 is simultaneously subjected to the elastic clamping force of the rotating tube segment groups of the topmost and bottommost heat dissipation tubes 2 in the row of heat dissipation tubes 2 located on the upper side, and the elastic clamping force of the rotating tube segment groups of the middle heat dissipation tubes 2 in the row of heat dissipation tubes 2 located on the lower side; or the same battery cell 6 is simultaneously subjected to the elastic clamping force of the rotating tube segment groups of the topmost and bottommost heat dissipation tubes 2 in the row of heat dissipation tubes 2 located on the lower side, and the elastic clamping force of the rotating tube segment groups of the middle heat dissipation tubes 2 in the row of heat dissipation tubes 2 located on the upper side, and for the same battery cell 6, the three elastic clamping forces it is subjected to are both axially displaced and partially circumferentially displaced, so that when the battery cell 6 vibrates, it can be supported from different directions, thereby helping to improve the stability and shock resistance of the battery cell 6 during use.

[0078] In a further embodiment, Figure 6 As shown, the coolant flows from right to left, and the penultimate row of battery cells 6 is taken as an example. Since the fixed tube segments 21 and the rotating tube segment groups of the heat dissipation tubes 2 in the same column of the row are alternately arranged along the extension direction of the battery cells 6, when the rotating rod 3 rotates counterclockwise, the pressing of the sliding protrusion 31 on the rotating tube segment 22 located on the upper side of the row of battery cells 6 can accelerate the flow of the coolant, but the pressing of the rotating tube segment 22 located on the lower side of the row of battery cells 6 hinders the normal flow of the coolant, thereby affecting the heat dissipation efficiency of the heat dissipation tubes 2 located on the lower side of the row of battery cells 6 to the battery cells 6. In order to solve this problem, as shown in FIG. Fig. 9 As shown, taking a row of heat pipes 2 located on the upper side of the same row of battery cells 6 as an example, for the heat pipes 2 located at the top and the bottom, it is set that the left ends thereof both penetrate the left side wall of the short side of the outer shell 1, and for the heat pipes 2 located in the middle, it is set that the right ends thereof penetrate the right side wall of the short side of the outer shell 1, so that when the coolant flows in the row of heat pipes 2, for the heat pipes 2 located at the top and the bottom, the coolant therein flows from right to left, and for the heat pipes 2 located in the middle, the coolant therein flows from left to right.

[0079] Similarly, taking a row of heat pipes 2 located at the lower side of the same row of battery cells 6 as an example, for the heat pipes 2 located at the top and the bottom, their right ends penetrate the right side wall of the short side of the outer shell 1, and for the heat pipes 2 located in the middle, their left ends penetrate the left side wall of the short side of the outer shell 1, so that when the coolant flows in the row of heat pipes 2, for the heat pipes 2 located at the top and the bottom, the coolant therein flows from left to right, and for the heat pipes 2 located in the middle, the coolant therein flows from right to left, so that when the rotating rod 3 rotates, the sliding protrusions 31 thereon can accelerate the flow speed of the coolant in the heat pipe 2 by pressing the base tube 221.

[0080] Moreover, since the coolant in adjacent heat dissipation tubes 2 in the same row flows in opposite directions, the heat exchange efficiency at various locations of the battery cells in the same row can be made consistent, thereby further reducing the temperature gradient between the battery cells 6, which is beneficial to improving the uniformity of heat dissipation and avoiding excessive local heat accumulation.

[0081] In order to facilitate the end of the heat dissipation pipe 2 to pass through the housing 1, a through hole 1101 is opened on the short side wall surface of the housing 1, and the heat dissipation pipe 2 is installed through the through hole 1101.

[0082] In order to form a circulation flow path for the coolant, the ends of the heat dissipation pipe 2 penetrating the housing 1 are connected to the liquid storage tank; Figure 8 As shown, liquid inlet pipes 51 are vertically arranged on the two side wall surfaces of the liquid cooling box 5, and the two liquid inlet pipes 51 are connected to the liquid inlet end of the liquid pump at the same time, so as to fill the coolant into the two liquid cooling boxes 5 at the same time.

[0083] In other embodiments, in order to improve the convenience of installing and removing the battery cell 6, the housing 1 is configured to be a split structure.

[0084] Specifically in this embodiment, Figure 8 As shown, the housing 1 is configured to consist of a bottom box 11 and a top cover 12, and the top of the bottom box 11 is open. When installed, the top cover 12 is covered at the top opening of the bottom box 11 to close the top opening of the bottom box 11.

[0085] During use, when installing or removing the battery cell 6, the top cover 12 is removed from the bottom box 11, and then the installation or removal work can be carried out.

[0086] In other embodiments, in order to further improve the heat dissipation efficiency of the battery cell 6 , the heat dissipation structure of the solid-state battery pack is configured to also include a ventilation member, and the ventilation member is configured to increase the air flow rate in the housing 1 .

[0087] Specifically in this embodiment, the ventilation member can be set as a hair dryer or an exhaust fan and installed on the outer wall of the outer shell 1; at the same time, in order to improve the air circulation and avoid the accumulation of hot air, which affects the heat dissipation of the battery cell 6, ventilation holes are opened on the side wall of the outer shell 1 and opposite to the ventilation member.

[0088] Taking the ventilation part as a hair dryer as an example, during use, the hair dryer is started, and the hair dryer can introduce cold air from the outside into the inside of the shell 1. The rapid influx of cold air carries the heat generated by the battery cell 6 to form thermal convection; as the hot air continues to increase, the hot air will be discharged to the outside of the shell 1 through the ventilation holes, achieving a continuous ventilation and heat dissipation process, thereby ensuring that the battery cell 6 is in a suitable operating temperature range, thereby ensuring stable and efficient operation of the solid-state battery pack.

[0089] In other embodiments, Figure 6 As shown, when the battery cell 6 is a cylindrical structure, the heat dissipation tube 2 is configured as a strip structure, and the strip surface of the heat dissipation tube 2 contacts the circumferential side wall of the battery cell 6, so as to improve the heat dissipation effect of the coolant on the battery cell 6 by increasing the contact area between the heat dissipation tube 2 and the battery cell 6.

[0090] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A solid-state battery pack heat dissipation structure, characterized in that: The solid-state battery pack heat dissipation structure is used to dissipate heat for the solid-state battery pack, the solid-state battery pack comprises a plurality of rows of battery cells, the plurality of rows of battery cells are electrically connected in series and parallel, and the battery cells in adjacent rows are arranged in a staggered manner; The solid-state battery pack heat dissipation structure comprises: A housing, wherein the solid-state battery pack is inserted into the housing during installation; A heat dissipation pipe, wherein the heat dissipation pipe is of a wavy structure and has a plurality of heat dissipation pipes, and is inserted in parallel between adjacent rows of battery cells; the heat dissipation pipe has a plurality of fixed pipe sections and a plurality of rotating pipe section groups, each of the rotating pipe section groups includes at least one rotating pipe section, and the rotating pipe section can rotate, the fixed pipe sections and the rotating pipe section groups are alternately arranged along the extension direction of the heat dissipation pipe, and the fixed pipe sections and the rotating pipe section groups of adjacent heat dissipation pipes are correspondingly arranged and are respectively clamped on both sides of the same battery cell; the first end of the heat dissipation pipe can receive a coolant from the outside, and the second end can discharge the coolant, so as to absorb the heat generated by the battery cell through the coolant; The rotating tube section is elastic; The solid-state battery pack heat dissipation structure also includes multiple rows of rotating rods, the rotating rods in the same row and the battery cells in the same row are arranged in parallel, each row includes multiple rotating rods, the rotating rods extend along the extension direction of the battery cells, and are located between the corresponding fixed pipe sections and the rotating pipe section groups of adjacent heat dissipation tubes, or between the heat dissipation tubes and the side walls of the outer shell, and are able to rotate; each of the rotating rods is provided with multiple sliding protrusions, the multiple sliding protrusions are arranged along the circumferential direction, and can elastically slide along the radial direction of the rotating rod to continuously press the rotating pipe section.

2. The solid-state battery pack heat dissipation structure according to claim 1, characterized in that: The solid-state battery pack heat dissipation structure also includes a transmission component, and the transmission component is configured to drive the rotating rod to rotate.

3. The solid-state battery pack heat dissipation structure according to claim 2, characterized in that: The transmission assembly includes a plurality of rotating shafts, which extend along the extension direction of the heat dissipation tube, are located between adjacent rows of the battery cells, and are capable of rotating; an impeller and a plurality of first bevel gears are fixedly sleeved on each of the rotating shafts; the impeller can drive the rotating shaft to rotate under the push of the coolant; a second bevel gear is fixedly sleeved on each of the rotating rods, and the second bevel gears on the plurality of rotating rods in the same row are respectively meshed with the plurality of first bevel gears on the same rotating shaft.

4. The solid-state battery pack heat dissipation structure according to claim 1, characterized in that: There are multiple heat dissipation tubes between adjacent rows of the battery cells, and the heat dissipation tubes are arranged in parallel along the extension direction of the battery cells.

5. The solid-state battery pack heat dissipation structure according to claim 4, characterized in that: The fixed tube section and the rotating tube section group of the plurality of heat dissipation tubes located between the battery cells in the same adjacent row clamping the same battery cell are arranged alternately.

6. The solid-state battery pack heat dissipation structure according to claim 1, characterized in that: The shell is a split structure.

7. The solid-state battery pack heat dissipation structure according to claim 1, characterized in that: The solid-state battery pack heat dissipation structure also includes a ventilation member, which is configured to increase the air flow rate in the housing.

8. The solid-state battery pack heat dissipation structure according to claim 1, characterized in that: When the battery core is a cylindrical structure, the heat dissipation tube is a strip-shaped structure, and the strip surface of the heat dissipation tube is in contact with the circumferential side wall of the battery core.

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