Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, and relates to the technical field of batteries. The battery module comprises a heat dissipation device with a body and a heat exchange column, and a single battery with a shell, a battery cell and a heat conduction column. The body is provided with a cooling cavity and a mounting cavity, the cooling cavity and the mounting cavity are not communicated with each other, the heat exchange column is arranged in the mounting cavity and provided with a heat exchange channel communicated with the cooling cavity, and the cooling cavity and the heat exchange channel are both used for containing heat exchange media. The shell is provided with a containing cavity, the battery cell and the heat conduction column are both arranged in the containing cavity, a through hole penetrating through the battery cell is formed in the battery cell, the heat conduction column penetrates through the through hole and is provided with a heat conduction channel, an open hole communicated with the heat conduction channel is formed in the shell, and the heat exchange column penetrates through the open hole and the heat conduction channel. According to the battery module provided by the invention, heat in the single batteries can be quickly conducted to the external environment, so that the use performance of the battery module can be maintained, and the risk of thermal runaway is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module and a battery pack. Background Art

[0002] During the use of the battery module, heat will be generated inside each single cell, causing the temperature inside the single cell to rise, thereby affecting the performance of the battery module. In severe cases, thermal runaway may occur, posing a major safety hazard.

[0003] In the related art, a liquid cooling plate is provided in the battery module, and the liquid cooling plate is attached to the outer wall of each single battery, or an air duct is provided around the single battery, so that the single battery can be cooled. However, since both of the above methods use a heat exchange medium to exchange heat with the outer surface of the single battery, the temperature reduction is small and the cooling effect on the single battery is limited. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a battery module and a battery pack, aiming to solve the technical problem in the related art of using a heat exchange medium to exchange heat with the outer surface of a single battery, resulting in poor cooling effect on the single battery.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery module, comprising:

[0007] A heat dissipation device, comprising a body and a heat exchange column, wherein the body is provided with a cooling chamber and an installation chamber, wherein the cooling chamber and the installation chamber are not connected to each other, wherein the heat exchange column is arranged in the installation chamber and is provided with a heat exchange channel connected to the cooling chamber, wherein both the cooling chamber and the heat exchange channel are used to accommodate a heat exchange medium;

[0008] A single battery comprises a shell, a battery cell and a heat-conducting column, wherein the shell has a receiving cavity, the battery cell and the heat-conducting column are both arranged in the receiving cavity, the battery cell is provided with a through hole, the through hole penetrates the battery cell along the axial direction of the battery cell, the heat-conducting column is penetrated by the through hole and is provided with a heat-conducting channel, the shell is provided with an opening connected to the heat-conducting channel, and the heat exchange column is respectively penetrated by the opening and the heat-conducting channel.

[0009] In one embodiment of the first aspect, along the radial direction of the battery core, the diameter of the heat conduction channel is d1, and the diameter of the single battery is d2, satisfying: 0.05<d1 / d2<0.5.

[0010] In one embodiment of the first aspect, the following is satisfied: 0.2<d1 / d2<0.5.

[0011] In one of the embodiments of the first aspect, a positioning groove is provided on the outer shell, the positioning groove and the opening are located on the same side of the outer shell in the axial direction, and the positioning groove and the opening are spaced apart, the accommodating cavity and the positioning groove are not connected to each other, and a positioning protrusion is provided on the inner wall of the main body located in the installation cavity, and the positioning protrusion is clamped in the positioning groove to limit the rotation of the single battery relative to the heat dissipation device.

[0012] In one of the embodiments of the first aspect, the outer shell includes a top cover assembly, a bottom cover and a shell having openings at both ends, the shell having the accommodating cavity and being connected between the top cover assembly and the bottom cover, the opening is arranged on the bottom cover, and one end of the thermal conductive column is connected to a side of the bottom cover facing the top cover assembly.

[0013] In one embodiment of the first aspect, one end of the heat-conducting column away from the bottom cover extends to the top cover assembly and is connected to the top cover assembly, and the heat-conducting channel runs through the top cover assembly; or

[0014] The end of the heat-conducting column away from the bottom cover is spaced apart from the top cover assembly.

[0015] In one of the embodiments of the first aspect, the positioning grooves are arranged on the bottom cover, and are at least two, the positioning grooves are located on both sides of the opening, the number of the positioning protrusions corresponds to the number of the positioning grooves, and each of the positioning protrusions is snapped into one of the positioning grooves.

[0016] In one embodiment of the first aspect, the battery module has a projection plane perpendicular to the axial direction of the battery cell, and an orthographic projection area of ​​the heat conduction channel on the projection plane and an orthographic projection area of ​​the heat exchange column on the projection plane are both non-circular.

[0017] In one embodiment of the first aspect, the main body is a battery box with an open mouth, and a plurality of the single cells and the heat exchange columns are provided, the plurality of the single cells are arranged in the installation cavity, the plurality of the heat exchange columns are spaced apart on the bottom wall of the installation cavity, each of the heat exchange columns is connected to one of the single cells, and a liquid inlet and a liquid outlet are provided on the battery box, the liquid inlet and the liquid outlet are spaced apart and are respectively connected to the cooling chamber.

[0018] In a second aspect, an embodiment of the present application further provides a battery pack, comprising the battery module described in any of the above embodiments.

[0019] The beneficial effects of this application are:

[0020] In the battery module provided by the present application, when heat is generated inside a single cell, the heat inside the battery cell will be transferred to the heat exchange column through the heat conductive column, thereby timely exchanging heat with the heat exchange medium in the heat exchange channel and the cooling chamber, and the heat dissipation path is more direct. In this way, the heat inside the single cell can be quickly transferred to the external environment, which is beneficial to maintaining the performance of the battery module and effectively reducing the risk of thermal runaway.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a battery module in some embodiments of the present application is shown;

[0024] Figure 2 A schematic diagram of the exploded structure of a battery module in some embodiments of the present application is shown;

[0025] Figure 3 A schematic diagram of the three-dimensional structure of the heat dissipation device in some embodiments of the present application is shown;

[0026] Figure 4 Shows Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0027] Figure 5 Shows Figure 4 The structural diagram of part B;

[0028] Figure 6 A schematic diagram of the three-dimensional structure of a single battery in some embodiments of the present application is shown;

[0029] Figure 7 Shows Figure 6 Schematic diagram of the cross-section structure at CC in the middle;

[0030] Figure 8 A schematic diagram of the exploded structure of a single cell in some embodiments of the present application is shown;

[0031] Fig. 9 A schematic diagram of the three-dimensional structure of a single battery after the top cover assembly and the battery core are hidden in some embodiments of the present application is shown;

[0032] Fig.10 Shows Fig. 9 Schematic diagram of the cross-sectional structure at DD in the middle;

[0033] Fig.11 A schematic diagram of the structure of the bottom cover from one perspective in some embodiments of the present application is shown;

[0034] Fig.12 A schematic diagram of the cross-sectional structure of a battery cell along its axial direction in some embodiments of the present application is shown;

[0035] Fig.13 Schematic diagrams of the three-dimensional structure of single cells in other embodiments of the present application are shown;

[0036] Fig.14 Shows Fig.13 Schematic diagram of the cross-sectional structure at EE in the middle;

[0037] Fig.15 Schematic diagrams of the exploded structure of single cells in other embodiments of the present application are shown;

[0038] Fig.16 A schematic diagram of the three-dimensional structure of a single battery after the top cover assembly and the battery core are hidden in some other embodiments of the present application is shown;

[0039] Fig.17 Shows Fig.16 Schematic diagram of the cross-sectional structure at FF;

[0040] Fig.18 A schematic structural diagram of a bottom cover from one perspective in some other embodiments of the present application is shown.

[0041] Description of main component symbols:

[0042] 1000-battery module; 100-heat dissipation device; 110-main body; 111-cooling chamber; 112-positioning protrusion; 113-installation cavity; 114-liquid inlet; 115-liquid outlet; 120-heat exchange column; 121-heat exchange channel; 200-single battery; 210-housing; 211-top cover assembly; 2111-cover plate; 2112-pole; 2113-upper insulating member; 2114-lower insulating member; 2115-rivet; 2116-sealing ring; 212-bottom cover; 2121-opening; 2122-positioning groove; 213-housing; 2131-accommodating cavity; 2132-opening; 220-battery cell; 221-through hole; 230-heat-conducting column; 231-heat-conducting channel; y-axial direction; x-radial direction. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In the present application, 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”, and “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”, and “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.

[0048] like Figure 1As shown, in the first aspect, an embodiment of the present application provides a battery module 1000, which relates to the field of battery technology and is mainly used in battery packs. Of course, the battery module 1000 may also not take the form of a battery pack but be directly used in electric vehicles, energy storage power stations, ships, spacecraft and other electrical devices.

[0049] like Figure 2 As shown, the battery module 1000 provided in this embodiment includes a heat dissipation device 100 and a single battery 200 .

[0050] like Figure 3 and Figure 4 As shown, the heat dissipation device 100 includes a main body 110 and a heat exchange column 120. The main body 110 is provided with a cooling chamber 111 and an installation chamber 113. The cooling chamber 111 and the installation chamber 113 are not connected to each other. The heat exchange column 120 is arranged in the installation chamber 113, and the heat exchange column 120 is provided with a heat exchange channel 121 connected to the cooling chamber 111. The cooling chamber 111 and the heat exchange channel 121 are both used to accommodate heat exchange medium.

[0051] Combination Figure 6 , Figure 7 and Fig.12 As shown, the single battery 200 includes a shell 210, a battery cell 220 and a heat-conducting column 230. The shell 210 has a accommodating cavity 2131. The battery cell 220 and the heat-conducting column 230 are both arranged in the accommodating cavity 2131. The battery cell 220 is provided with a through hole 221, and the through hole 221 penetrates the battery cell 220 along the axial direction y of the battery cell 220. The heat-conducting column 230 is penetrated by the through hole 221, and the heat-conducting column 230 is provided with a heat-conducting channel 231. The shell 210 is provided with an opening 2121 connected with the heat-conducting channel 231, and the heat exchange column 120 is respectively penetrated by the opening 2121 and the heat-conducting channel 231.

[0052] Exemplarily, the heat exchange medium may be liquid or gas, such as water, ethylene glycol aqueous solution, air, oil, refrigerant, etc. These media can exchange heat with the heat conductive column 230 to reduce the temperature of the single battery 200, and the type of heat exchange medium is not specifically limited here.

[0053] It should be noted that the battery cell 220 can be made by a winding process. Specifically, the positive electrode sheet, the negative electrode sheet and the separator are wound together by the winding needle of the winding machine to form a winding core. After the winding is completed, the winding core is taken out from the winding needle to form the through hole 221. Of course, the battery cell 220 can also be made by a cutting and stacking process. Specifically, holes are punched in the positive electrode sheet, the negative electrode sheet and the separator in advance, and then the positive electrode sheet, the negative electrode sheet and the separator are stacked to form the battery cell 220. At this time, the hole positions of the positive electrode sheet, the hole positions of the negative electrode sheet and the hole positions of the separator are aligned and connected to form the through hole 221. The type of the battery cell 220 is not specifically limited here.

[0054] It should be mentioned that in the related art, a liquid cooling plate is provided in the battery module, and the liquid cooling plate is attached to the outer wall of each single battery, or an air duct is provided around the single battery, so that the single battery can be cooled. However, since the above two methods both use heat exchange medium to exchange heat with the outer surface of the single battery, the temperature reduction is small and the cooling effect on the single battery is limited.

[0055] It can be understood that in the battery module 1000 provided in this embodiment, when heat is generated inside the single cell 200, the heat inside the battery cell 220 will be transferred to the heat exchange column 120 through the heat conductive column 230, thereby timely exchanging heat with the heat exchange channel 121 and the heat exchange medium in the cooling chamber 111, and the heat dissipation path is more direct. In this way, the heat inside the single cell 200 can be quickly transferred to the external environment, which is beneficial to maintaining the performance of the battery module 1000 and effectively reducing the risk of thermal runaway.

[0056] At the same time, since the heat-conducting column 230 is provided at the through hole 221 of the battery cell 220, it can play a limiting effect on the battery cell 220, reduce the possibility of the battery cell 220 shaking in the accommodating cavity 2131, and increase the safety of the single battery 200. In addition, since the heat exchange column 120 is provided in the heat-conducting channel 231 of the heat-conducting column 230, it can play a limiting effect on the single battery 200, reduce the possibility of the single battery 200 shaking relative to the heat dissipation device 100, and increase the structural stability of the battery module 1000.

[0057] like Figure 7 As shown, in one embodiment, along the radial direction x of the battery core 220 , the diameter of the heat conduction channel 231 is d1 , and the diameter of the single battery 200 is d2 , satisfying: 0.05<d1 / d2<0.5.

[0058] For example, 3mm<d1<75mm, 10mm<d2<150mm. Along the axial direction y of the battery cell 220 , the height of the single battery 200 is h, which satisfies: 40mm<h<400mm.

[0059] Among them, d1 can be selected from any value of 3mm, 5mm, 8mm, 10mm, 12mm, 15mm, 18mm, 20mm, 25mm, 30mm, 38mm, 45mm, 50mm, 58mm, 60mm, 67mm, 75mm, or any value in a range consisting of any two of them. d2 can be selected from any value of 10mm, 20mm, 30mm, 40mm, 42mm, 46mm, 50mm, 55mm, 60mm, 70mm, 85mm, 90mm, 100mm, 120mm, 145mm, 150mm, or any value in a range consisting of any two of them. h can be selected from any value of 40mm, 50mm, 65mm, 75mm, 80mm, 95mm, 100mm, 130mm, 135mm, 200mm, 300mm, 355mm, 380mm, 400mm, or any value in a range consisting of any two of them.

[0060] It should be noted that the above-mentioned heat conduction channel 231 is a cylindrical channel, and the single cell 200 is a cylindrical battery. The cooling efficiency of the single cell 200 can be characterized by the temperature rise during charging, and the temperature rise at the same position on the single cell 200 = the highest temperature - the normal temperature. The temperature rise data can be obtained by setting a temperature sensor inside the single cell 200 for actual measurement. Specifically, the temperature rise data of the single cell 200 within 10s is collected in a constant temperature room of 25±2℃, and the battery capacity is calculated, and the detection results of the single cell 200 of Examples 1-11 are shown in Table 1.

[0061]

[0062] It can be seen from Table 1 that, under the same conditions of h and energy density, as d1 / d2 increases, the temperature rise of the single battery 200 gradually decreases, but the battery capacity also decreases accordingly. The temperature rise is not higher than 35°C and the battery capacity is not less than 9Ah, which is considered qualified.

[0063] In this embodiment, selecting 0.05<d1 / d2<0.5 can make the single battery 200 have a relatively large battery capacity and a relatively small temperature rise, so as to maintain the performance of the battery module 1000.

[0064] Furthermore, the following condition is satisfied: 0.2<d1 / d2<0.5, so that the temperature rise of the single battery 200 is smaller.

[0065] like Figure 4 , Figure 5 and Fig.11As shown, in one embodiment, a positioning groove 2122 is provided on the shell 210, the positioning groove 2122 and the opening 2121 are located on the same side of the shell 210 in the axial direction y, and the positioning groove 2122 and the opening 2121 are arranged at intervals, the accommodating cavity 2131 and the positioning groove 2122 are not connected to each other, and a positioning protrusion 112 is provided on the inner wall of the main body 110 located in the installation cavity 113, and the positioning protrusion 112 is clamped in the positioning groove 2122 to limit the rotation of the single battery 200 relative to the heat dissipation device 100.

[0066] Exemplarily, the number of the positioning protrusions 112 and the number of the positioning grooves 2122 can be two, and each positioning protrusion 112 is disposed in one positioning groove 2122. Of course, the number of the positioning protrusions 112 and the number of the positioning grooves 2122 can be one, three, four, etc., which can be selected according to design requirements.

[0067] In this embodiment, since the heat exchange column 120 is inserted into the heat conduction channel 231 of the heat conduction column 230, and the positioning protrusion 112 is clamped in the positioning groove 2122, the two can cooperate to play a role of stopping rotation, that is, limiting the rotation of the single cell 200 relative to the heat dissipation device 100, thereby increasing the stability of the single cell 200 after being installed in the installation cavity 113, and extending the service life of the battery module 1000.

[0068] It should be noted that if Figure 8 , Fig. 9 and Fig.11 As shown, the heat exchange column 120 and the heat conduction channel 231 can both be cylindrical, and in this case, the positioning protrusion 112 and the positioning groove 2122 can play a role in preventing the single battery 200 from rotating. Fig.15 , Fig.16 and Fig.18 As shown, the heat exchange column 120 and the heat conduction channel 231 can both be square. In this case, the square heat exchange column 120 is inserted into the square heat conduction channel 231, which can independently play a role in preventing the single battery 200 from rotating. On this basis, adding the positioning protrusion 112 and the positioning groove 2122 can further improve the anti-rotation effect. At the same time, when the shape of the heat conduction column 230 is square, the heat conduction column 230 can limit the rotation of the battery cell 220 relative to the housing 210, play a role in preventing the battery cell 220 from rotating, and increase the stability of the battery cell 220 in the housing 210.

[0069] like Figure 6 , Figure 8 and Fig. 9As shown, further, the housing 210 includes a top cover assembly 211, a bottom cover 212 and a shell 213 with openings 2132 at both ends, the shell 213 has a accommodating cavity 2131, and is connected between the top cover assembly 211 and the bottom cover 212, the opening 2121 is arranged on the bottom cover 212, and one end of the heat conductive column 230 is connected to the side of the bottom cover 212 facing the top cover assembly 211.

[0070] In this embodiment, since an opening 2121 is provided on the bottom cover 212, and the heat-conducting column 230 is connected to the side of the bottom cover 212 facing the top cover assembly 211, the heat exchange column 120 can pass through the bottom cover 212 and be inserted into the heat-conducting channel 231 of the heat-conducting column 230, so that heat exchange is performed with the interior of the battery cell 220 with the help of the heat-conducting column 230, and the heat generated inside the battery cell 220 is directly discharged, thereby improving the cooling effect of the single battery 200.

[0071] like Fig.10 and Fig.11 As shown, exemplarily, the positioning grooves 2122 are arranged on the bottom cover 212 , and there are at least two positioning grooves 2122 , the positioning grooves 2122 are located on both sides of the opening 2121 , the number of the positioning protrusions 112 corresponds to the number of the positioning grooves 2122 , and each positioning protrusion 112 is snapped into a positioning groove 2122 .

[0072] like Figure 6 and Figure 7 and Fig.10 As shown, further, one end of the heat-conducting column 230 away from the bottom cover 212 extends to the top cover assembly 211 and is connected to the top cover assembly 211 , and the heat-conducting channel 231 passes through the top cover assembly 211 .

[0073] In this embodiment, the end of the heat-conducting column 230 away from the bottom cover 212 is extended to the top cover assembly 211 and connected to the top cover assembly 211, so that the heat-conducting column 230 is connected between the bottom cover 212 and the top cover assembly 211, and the three can support each other to form a stable structure, thereby effectively limiting the movement of the battery cell 220 relative to the shell 210, and increasing the stability of the bottom cover 212 and the top cover assembly 211 after being installed in the shell 213. At the same time, the heat-conducting column 230 can penetrate the axial direction y of the battery cell 220, increase the heat exchange area between the battery cell 220, and thus improve the cooling effect on the single battery 200.

[0074] like Fig.13 , Fig.14 and Fig.17As shown, of course, for the above embodiment, the end of the thermally conductive column 230 away from the bottom cover 212 and the top cover assembly 211 can be arranged at intervals, which can also achieve the heat inside the battery cell 220 being conducted to the external environment. No specific restrictions are made on the relationship between the thermally conductive column 230 and the top cover assembly 211.

[0075] like Figure 7 and Figure 8 As shown, further, the top cover assembly 211 includes a cover plate 2111 , a pole 2112 , an upper insulating member 2113 , a lower insulating member 2114 , a rivet 2115 and a sealing ring 2116 . The cover plate 2111 is sealed at the opening 2132, the upper insulating member 2113 is arranged on the side of the cover plate 2111 away from the battery cell 220, the lower insulating member 2114 is arranged on the side of the cover plate 2111 facing the battery cell 220, the pole 2112 is penetrated by the cover plate 2111, the upper insulating member 2113 and the lower insulating member 2114, and is sealed with the cover plate 2111 by a sealing ring 2116, the rivet 2115 is arranged on the side of the upper insulating member 2113 away from the battery cell 220, and is riveted to the pole 2112, the end of the heat conductive column 230 away from the bottom cover 212 is connected to the cover plate 2111, and the heat conductive channel 231 runs through the cover plate 2111.

[0076] It can be understood that based on the above structure, the heat conductive column 230 is connected between the bottom cover 212 and the cover plate 2111. The three can support each other to form a stable structure, thereby increasing the structural stability of the single cell 200. At the same time, it will not affect the installation of parts such as the pole 2112 and the insulating part and the cover plate 2111.

[0077] like Fig.15 and Fig.18 As shown, in one embodiment, the battery module 1000 has a projection plane perpendicular to the axial direction y of the battery cell 220, and the orthographic projection area of ​​the heat conduction channel 231 on the projection plane and the orthographic projection area of ​​the heat exchange column 120 on the projection plane are both non-circular.

[0078] For example, the non-circular shape may be an ellipse, a square, a rectangle, etc.

[0079] In this embodiment, the non-circular heat exchange column 120 and the non-circular heat conductive channel 231 cooperate to prevent the single cell battery 200 from rotating, that is, to limit the rotation of the single cell battery 200 relative to the heat dissipation device 100, thereby increasing the stability of the single cell battery 200 after being installed in the installation cavity 113 and extending the service life of the battery module 1000.

[0080] like Figure 2 and Figure 3As shown, in one embodiment, the main body 110 is a battery box with an open mouth, and a plurality of single cells 200 and heat exchange columns 120 are provided. The plurality of single cells 200 are arranged in the installation cavity 113, and the plurality of heat exchange columns 120 are spaced apart on the bottom wall of the installation cavity 113, and each heat exchange column 120 is connected to a single cell 200. A liquid inlet 114 and a liquid outlet 115 are provided on the battery box, and the liquid inlet 114 and the liquid outlet 115 are spaced apart and are respectively connected to the cooling chamber 111.

[0081] For example, the number of the heat exchange columns 120 and the number of the single cells 200 can be two, three, four, five, etc., which can be selected according to design requirements.

[0082] It should be noted that the liquid inlet 114 is used to connect to the output end of the heat exchange medium supply device, and the liquid outlet 115 is used to connect to the input end of the heat exchange medium supply device.

[0083] In this embodiment, by arranging a liquid inlet 114 and a liquid outlet 115 on the battery box, so that the two are connected to the cooling chamber 111 respectively, the heat exchange medium can be circulated between the cooling chamber 111 and the heat exchange medium supply equipment, thereby realizing circulation cooling of the battery pack, which is beneficial to maintaining the performance of the battery module 1000 and effectively reducing the risk of thermal runaway.

[0084] In a second aspect, an embodiment of the present application provides a battery pack, comprising the battery module 1000 in any of the above embodiments.

[0085] It is understandable that, since the battery pack provided in this embodiment has the battery module 1000 in any of the above embodiments, it has all the beneficial effects of the battery module 1000, which will not be described in detail here.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0087] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery module, characterized in that: include: A heat dissipation device (100) comprises a body (110) and a heat exchange column (120), wherein the body (110) is provided with a cooling chamber (111) and a mounting chamber (113), wherein the cooling chamber (111) and the mounting chamber (113) are not connected to each other, and the heat exchange column (120) is arranged in the mounting chamber (113) and is provided with a heat exchange channel (121) connected to the cooling chamber (111), wherein the cooling chamber (111) and the heat exchange channel (121) are both used for accommodating a heat exchange medium; A single battery (200) comprises a shell (210), a battery cell (220) and a heat-conducting column (230), wherein the shell (210) has a receiving cavity (2131), the battery cell (220) and the heat-conducting column (230) are both arranged in the receiving cavity (2131), the battery cell (220) is provided with a through hole (221), the through hole (221) penetrates the battery cell (220) along the axial direction (y) of the battery cell (220), the heat-conducting column (230) is penetrated in the through hole (221), and is provided with a heat-conducting channel (231), the shell (210) is provided with an opening (2121) communicating with the heat-conducting channel (231), and the heat-exchange column (120) is respectively penetrated in the opening (2121) and the heat-conducting channel (231).

2. The battery module according to claim 1, characterized in that: Along the radial direction (x) of the battery core (220), the diameter of the heat conduction channel (231) is d1, and the diameter of the single battery (200) is d2, satisfying: 0.05<d1 / d2<0.

5.

3. The battery module according to claim 2, characterized in that: Satisfies: 0.2<d1 / d2<0.

5.

4. The battery module according to claim 1, characterized in that: The housing (210) is provided with a positioning groove (2122); the positioning groove (2122) and the opening (2121) are located on the same side of the housing (210) in the axial direction (y); the positioning groove (2122) and the opening (2121) are arranged at intervals; the accommodating cavity (2131) and the positioning groove (2122) are not connected to each other; the inner wall of the body (110) located in the installation cavity (113) is provided with a positioning protrusion (112); the positioning protrusion (112) is engaged in the positioning groove (2122) to limit the rotation of the single battery (200) relative to the heat dissipation device (100).

5. The battery module according to claim 4, characterized in that: The housing (210) comprises a top cover assembly (211), a bottom cover (212) and a shell (213) having openings (2132) at both ends; the shell (213) has the accommodating cavity (2131) and is connected between the top cover assembly (211) and the bottom cover (212); the opening (2121) is arranged on the bottom cover (212); one end of the heat conductive column (230) is connected to a side of the bottom cover (212) facing the top cover assembly (211).

6. The battery module according to claim 5, characterized in that: One end of the heat-conducting column (230) away from the bottom cover (212) extends to the top cover assembly (211) and is connected to the top cover assembly (211), and the heat-conducting channel (231) runs through the top cover assembly (211); or The end of the heat-conducting column (230) away from the bottom cover (212) is arranged spaced apart from the top cover assembly (211).

7. The battery module according to claim 5, characterized in that: The positioning grooves (2122) are arranged on the bottom cover (212), and at least two of them are arranged. The positioning grooves (2122) are located on both sides of the opening (2121). The number of the positioning protrusions (112) corresponds to the number of the positioning grooves (2122), and each of the positioning protrusions (112) is snap-fitted into one of the positioning grooves (2122).

8. The battery module according to any one of claims 1 to 7, characterized in that: The battery module has a projection plane perpendicular to the axial direction (y) of the battery core (220), and the orthographic projection area of ​​the heat conduction channel (231) on the projection plane and the orthographic projection area of ​​the heat exchange column (120) on the projection plane are both non-circular.

9. The battery module according to any one of claims 1 to 7, characterized in that: The body (110) is an open battery box, and a plurality of the single cells (200) and the heat exchange columns (120) are provided. The plurality of single cells (200) are arranged in the installation cavity (113), and the plurality of heat exchange columns (120) are arranged at intervals on the bottom wall of the installation cavity (113). Each heat exchange column (120) is connected to a single cell (200). A liquid inlet (114) and a liquid outlet (115) are provided on the battery box. The liquid inlet (114) and the liquid outlet (115) are arranged at intervals and are respectively connected to the cooling chamber (111).

10. A battery pack, characterized in that: A battery module comprising any one of claims 1 to 9.

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