Battery module and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery module and a battery pack, the battery module comprises a plurality of cylindrical batteries, a first bracket, a second bracket, a first heating piece, a first heat conduction piece, a second heating piece and a second heat conduction piece. The first end of the cylindrical battery is provided with a positive electrode, a negative electrode and an anti-explosion valve, the second end of the cylindrical battery is provided with a concave part, the first support and the second support are provided with a first jack and a second jack matched with the first end and the second end respectively, a groove is formed in the side, away from the first support, of the second support, and the first heating piece is installed on the side, away from the first end, of the first support. The first heat conduction piece is clamped between the first support and the first heating piece, the second heat conduction piece is installed in the groove, and the second heating piece is installed on the side, away from the first support, of the second support. The battery module can be used in a low-temperature environment, and is relatively high in safety and durability.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery module and battery package. BACKGROUND

[0002] With the increasing love of people for outdoor sports, motor home travel becomes a trend, and more and more people choose motor home as a carrier for long-distance travel and outdoor camping. In this application scenario, the performance requirements of motor home battery package are further improved, especially in the aspects of wide temperature range adaptability and mechanical stability, which must have higher requirements. In low temperature environment, the traditional battery package has reduced charging and discharging efficiency due to increased viscosity of electrolyte and reduced internal chemical reaction activity, and even cannot work normally. At the same time, during the driving of motor home, the battery package also needs to bear mechanical stress such as vibration and impact, so the structure design needs to be optimized to improve the overall safety and durability.

[0003] In summary, it is urgent to provide a battery module and battery package that can meet the use in low temperature environment and have high safety and durability. UTILITY MODEL CONTENTS

[0004] The first purpose of the utility model is to provide a battery module that can meet the use in low temperature environment and has high safety and durability.

[0005] The second purpose of the utility model is to provide a battery package that can meet the use in low temperature environment and has high safety and durability.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model discloses a kind of battery module, comprising: multiple cylindrical batteries, the first end of the cylindrical battery is provided with positive and negative, second end is provided with recess part;First support and second support, the first support and the second support are respectively provided with the first jack and the second jack matched with the first end and the second end, the side of the second support away from the first support is provided with recess, first heating piece and first heat conducting piece, the first heating piece is installed in the side of the first support away from the first end, the first heat conducting piece is clamped between the first support and the first heating piece;Second heating piece and second heat conducting piece, the second heat conducting piece is installed in the recess, and the second heating piece is installed in the side of the second support away from the first support.

[0008] In some embodiments, the recess is multiple and is spaced, and each recess is provided with one second heat conducting piece.

[0009] In some embodiments, the first support has a first accommodating groove on a side facing away from the second support, the battery module further comprises a connecting row and a collecting plate installed in the first accommodating groove, the connecting row is used for connecting two adjacent cylindrical batteries, and the collecting plate is connected with the connecting row; wherein the first heat-conducting member covers the connecting row and the collecting plate.

[0010] In some embodiments, the second support has a second accommodating groove on a side facing away from the first support, the second accommodating groove is used for accommodating the second heating member, the groove is arranged through a bottom wall of the second accommodating groove, one of the bottom wall of the second accommodating groove and the second heating member is provided with a positioning hole, the other of the bottom wall of the second accommodating groove and the second heating member is provided with a positioning column matched with the positioning hole, and a surface of the second heating member facing away from the second heat-conducting member is arranged flush with a surface of the second support facing away from the first support.

[0011] In some embodiments, the first heat-conducting member has a thickness of 1.5mm-3mm; and / or, the second heat-conducting member has a thickness of 1.5mm-3mm.

[0012] In some embodiments, the battery module further comprises a battery control plate, the battery control plate is installed on a side of the first heating member facing away from the first heat-conducting member, wherein the heating power of the first heating member is less than the heating power of the second heating member.

[0013] In some embodiments, the first heating member has a thickness less than a thickness of the second heating member, wherein the thickness of the first heating member is 0.3mm-0.5mm; and / or, the thickness of the second heating member is 1mm-2mm.

[0014] The utility model discloses still disclose a kind of battery pack, including shell and battery module described in the foregoing.

[0015] In some embodiments, the shell is filled with a thermal insulation member that encloses the battery module.

[0016] In some embodiments, the shell includes a shell body and an end plate, the shell body is open at least one end along a first direction, the end plate is installed at the open end of the shell body, the battery module can be inserted into the shell body along the first direction, and the height direction of the cylindrical battery of the battery module is a second direction perpendicular to the first direction.

[0017] The battery module has the beneficial effects that: the first heating piece and the first heat conduction piece are in contact with the connecting row, so that the first end of the cylindrical battery is heated; the second heating piece is in contact with the second end of the cylindrical battery through the second heat conduction piece, so that the second end of the cylindrical battery is heated; in the actual working process, the cylindrical battery can be quickly heated in a low-temperature environment, and the low-temperature performance is improved.

[0018] The battery pack has the beneficial effects that: the cylindrical battery is used, in the actual working process, the cylindrical battery can be quickly heated in a low-temperature environment, and the low-temperature performance is improved; and the battery module is installed in a sealed space through the shell, so that better structural stability and better cylindrical battery temperature uniformity are achieved.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, become obvious from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the battery module of the embodiment of the present application;

[0021] Figure 2 is an exploded structural schematic diagram of the battery module of the embodiment of the present application;

[0022] Figure 3 is an exploded structural schematic diagram of the battery module of the embodiment of the present application, in which the battery control board is removed;

[0023] Figure 4 is a local structural exploded schematic diagram of the battery module of the embodiment of the present application;

[0024] Figure 5 is another local structural exploded schematic diagram of the battery module of the embodiment of the present application;

[0025] Figure 6 is a structural schematic diagram of the first end of the cylindrical battery of the battery module of the embodiment of the present application;

[0026] Figure 7 is a structural schematic diagram of the second end of the cylindrical battery of the battery module of the embodiment of the present application;

[0027] Figure 8 is a structural schematic diagram of the battery pack of the embodiment of the present application;

[0028] Figure 9 Figure 1 is a schematic diagram of a battery pack according to an embodiment of the present application.

[0029] Reference signs:

[0030] 10, cylindrical battery; 101, first end; 102, second end; 103, positive electrode; 104, negative electrode; 105, explosion-proof valve; 106, recess;

[0031] 20, first support; 201, first insertion hole; 202, first accommodating groove;

[0032] 30, second support; 301, second insertion hole; 302, second accommodating groove; 303, groove; 304, positioning column;

[0033] 40, first heating member; 50, first heat-conducting member;

[0034] 60, second heating member; 601, positioning hole; 70, second heat-conducting member;

[0035] 80, connecting row; 90, collecting plate; 100, battery control board;

[0036] 200, shell; 210, shell body; 220, end plate; 221, top plate; 222, bottom plate. DETAILED DESCRIPTION

[0037] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, rather than all the structures.

[0038] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] This utility model discloses a battery module, referenced... Figures 1-3 As shown, the battery module includes multiple cylindrical batteries 10, a first bracket 20, a second bracket 30, a first heating element 40, a first heat-conducting element 50, a second heating element 60, and a second heat-conducting element 70. (Reference) Figures 6-7 As shown, the first end 101 of the cylindrical battery 10 is provided with a positive electrode 103, a negative electrode 104 and an explosion-proof valve 105, and the second end 102 is provided with a recess 106. The first bracket 20 and the second bracket 30 are respectively provided with a first insertion hole 201 and a second insertion hole 301 that cooperate with the first end 101 and the second end 102. The second bracket 30 is provided with a groove 303 on the side away from the first bracket 20. The first heating element 40 is installed on the side of the first bracket 20 away from the first end 101. The first heat-conducting element 50 is sandwiched between the first bracket 20 and the first heating element 40. The second heat-conducting element 70 is installed in the groove 303. The second heating element 60 is installed on the side of the second bracket 30 away from the first bracket 20. It is understandable that the first end 101 of the cylindrical battery 10 is provided with a positive electrode 103, a negative electrode 104 and an explosion-proof valve 105, and the second end 102 is provided with a recessed portion 106. In the actual assembly process, multiple cylindrical batteries 10 are connected by connecting strips 80 through same-end welding. The first heating element 40 and the first heat-conducting element 50 heat the first end 101 of the cylindrical battery 10 by contacting the connecting strips 80. The second heating element 60 directly contacts the second end 102 of the cylindrical battery 10 through the second heat-conducting element 70 to heat the second end 102 of the cylindrical battery 10. In actual operation, this ensures that the cylindrical battery 10 can heat up quickly in low-temperature environments, thereby improving low-temperature performance. The first bracket 20 serves as a limiting structure for the first end 101 of the cylindrical battery 10, while also supporting the first heating element 40 and the first heat-conducting element 50. The second bracket 30 serves as a limiting structure for the second end 102 of the cylindrical battery 10, while also mounting the second heat-conducting element 70 and the second heating element 60. This design can improve the safety of the battery module and extend its service life.

[0041] Optionally, the first bracket 20 and the second bracket 30 are made of high-strength engineering plastics to improve impact resistance and ensure that the battery module maintains good stability during the RV's operation.

[0042] refer toFigure 2 As shown, the battery module further comprises a battery control board 100, the battery control board 100 is installed on the side of the first heating member 40 away from the first heat-conducting member 50, and the heating power of the first heating member 40 is less than that of the second heating member 60. It can be understood that the battery control board 100 is used to control the working state of the cylindrical battery 10, the first heating member 40 and the second heating member 60, which will generate heat itself during operation, that is, the first end 101 of the cylindrical battery 10 will not only be heated by the first heating member 40 but also by the battery control board 100 during actual operation. In this embodiment, the heating power of the first heating member 40 is less than that of the second heating member 60, which is beneficial to ensure that the temperature difference between the first end 101 and the second end 102 of the cylindrical battery 10 is small during actual operation, thereby prolonging the service life of the cylindrical battery 10.

[0043] Optionally, the thickness of the first heating member 40 is less than that of the second heating member 60. Thus, it is beneficial to ensure that the temperature difference between the first end 101 and the second end 102 of the cylindrical battery 10 is small during actual operation, thereby prolonging the service life of the cylindrical battery 10.

[0044] Further optionally, the thickness of the first heating member 40 is 0.3mm-0.5mm. The thickness of the first heating member 40 can be 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.39mm, 0.39mm, 0.4mm, 0.41mm, 0.42mm, 0.43mm, 0.44mm, 0.45mm, 0.46mm, 0.47mm, 0.48mm, 0.49mm, 0.5mm. Of course, the thickness of the first heating member 40 can also be selected as other values within the above range or values outside the above range according to actual needs.

[0045] Further optionally, the thickness of the second heating member 60 is 1mm-2mm. The thickness of the second heating member 60 can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm. Of course, the thickness of the first heating member 40 can also be selected as other values within the above range or values outside the above range according to actual needs.

[0046] Reference Figures 3-4As shown, the side of the first support 20 away from the second support 30 has a first accommodating groove 202, the battery module further comprises a connecting row 80 and a collection plate 90 installed in the first accommodating groove 202, the connecting row 80 is used for connecting two adjacent cylindrical batteries 10, and the collection plate 90 is connected with the connecting row 80; wherein the first heat-conducting member 50 covers the connecting row 80 and the collection plate 90. It can be understood that the electrical connection of the plurality of cylindrical batteries 10 can be realized through the connecting row 80 and the collection plate 90, and the related parameters of the cylindrical batteries 10 can be collected, and the first heat-conducting member 50 is covered on the connecting row 80 and the collection plate 90, which can uniformly spread the heat generated by the first heating member 40 to the first end 101 of the cylindrical battery 10 in the actual working process, reduce the temperature difference between the first ends 101 of the plurality of cylindrical batteries 10, and is beneficial to improve the temperature uniformity of the battery module in the working process, thereby prolonging the service life of the battery module.

[0047] Optionally, the collection plate 90 adopts a sunken design, so that it is kept at the same height as the connecting row 80, thereby improving the structural stability.

[0048] Reference Figure 5 As shown, the grooves 303 are arranged at intervals, and each groove 303 is provided with a second heat-conducting member 70. It can be understood that the plurality of cylindrical batteries 10 are usually arranged in multiple rows, the grooves 303 are designed as multiple, and each groove 303 is provided with a second heat-conducting member 70, which can uniformly spread the heat generated by the second heating member 60 to the second end 102 of the cylindrical battery 10 in the actual working process, reduce the temperature difference between the second ends 102 of the plurality of cylindrical batteries 10, and is beneficial to improve the temperature uniformity of the battery module in the working process, thereby prolonging the service life of the battery module.

[0049] Reference Figure 5 As shown, the side of the second support 30 away from the first support 20 has a second accommodating groove 302, the second accommodating groove 302 is used for accommodating the second heating member 60, the groove 303 penetrates the bottom wall of the second accommodating groove 302, and the surface of the second heating member 60 away from the second heat-conducting member 70 is arranged flush with the surface of the second support 30 away from the first support 20. It can be understood that the second heating member 60 is installed through the second accommodating groove 302, which is convenient for the installation of the second heating member 60 and improves the stability of the second heating member 60, and on the other hand, the distance between the second heating member 60 and the second end 102 of the cylindrical battery 10 is reduced, which is beneficial to the miniaturization of the battery module and improves the heating efficiency of the second heating member 60 to the second end 102 of the cylindrical battery 10.

[0050] Optionally, the second heating element 60 is provided with a positioning hole 601, and the bottom wall of the second accommodating groove 302 is provided with a positioning column 304 matched with the positioning hole 601. It can be understood that, in the actual installation process, when the second heating element 60 is installed on the bottom wall of the second accommodating groove 302, the cooperation of the positioning column 304 and the positioning hole 601 facilitates the installation of the second heating element 60 and improves the installation stability of the second heating element 60. Of course, in other embodiments of the present application, the second heating element 60 is provided with a positioning column 304, and the bottom wall of the second accommodating groove 302 is provided with a positioning hole 601 matched with the positioning hole 601. The number and arrangement of the positioning hole 601 and the positioning column 304 can be selected according to actual needs, and the number and arrangement of the positioning hole 601 and the positioning column 304 are not limited herein.

[0051] It should be noted that the thickness of the first and second heat-conducting elements 50 and 70 needs to be controlled within a small range, because the relationship between the thermal conductivity k and the thickness d can be described by the Fourier heat conduction law: q=(kA(T1-T2)) / d, wherein k is the thermal conduction rate, A is the heat conduction area, and T1 and T2 are the temperatures of the two surfaces of the heat-conducting element. When the thickness d of the first and second heat-conducting elements 50 and 70 is too large, the thermal resistance R=d / kA increases, thereby reducing the heat conduction efficiency and causing the first and second ends 101 and 102 of the cylindrical battery 10 to be difficult to heat up rapidly. In the present embodiment, the thickness of the first heat-conducting element 50 is 1.5-3 mm, and the thickness of the second heat-conducting element 70 is 1.5-3 mm to ensure rapid heating and stable thermal management of the cylindrical battery 10.

[0052] Optionally, the thickness of the first heat-conducting element 50 is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3 mm. The thickness of the first heat-conducting element 50 can also be other values between 1.5 mm and 3 mm, and is not limited to the above examples. Of course, the thickness of the first heat-conducting element 50 can also be adjusted according to actual needs, and is not limited to the above range.

[0053] Optionally, the thickness of the second heat-conducting element 70 is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3 mm. The thickness of the second heat-conducting element 70 can also be other values between 1.5 mm and 3 mm, and is not limited to the above examples. Of course, the thickness of the second heat-conducting element 70 can also be adjusted according to actual needs, and is not limited to the above range.

[0054] The utility model discloses a battery pack, refer to Figures 8-9 As shown in the preceding text, the battery pack includes a shell 200 and the battery module of the preceding text. Due to the cylindrical battery 10 described in the preceding text, in the actual working process, it is ensured that the cylindrical battery 10 can be quickly heated in a low-temperature environment, the low-temperature performance is improved, and the battery module is installed in a sealed space through the shell 200, so that better structural stability and better temperature uniformity of the cylindrical battery 10 can be improved.

[0055] Optionally, the shell 200 is filled with a heat preservation piece wrapping the battery module. It can be understood that filling the shell 200 with the heat preservation piece wrapping the battery module can reduce heat loss and improve the temperature consistency of the battery pack.

[0056] Further optionally, the heat preservation piece can be foamed glue. The thermal conductivity coefficient of the foamed piece is generally between 0.04 W / m·K and 0.06 W / m·K, which is higher than that of air (about 0.026 W / m·K). Although the thermal conductivity coefficient of the foamed glue is slightly higher than that of air, it can form a closed cavity, reduce heat convection, and make the internal temperature of the cylindrical battery 10 more uniform. The principle of the foamed glue reducing thermal runaway can be described by the heat transfer equation: q=(kA(T1-T2)) / L, wherein k is the thermal conductivity coefficient, L is the thickness of the heat insulation layer, A is the heat transfer area, and T1 and T2 are the temperature gradient. Compared with air, the foamed glue can reduce the formation of local overheating points and make the temperature of the cylindrical battery 10 more uniform. At the same time, the internal microporous structure of the foamed glue can absorb and diffuse heat, reduce the extreme fluctuation of the temperature of a single cylindrical battery 10 unit, and effectively inhibit the occurrence of thermal runaway.

[0057] Reference Figure 9As shown, the shell 200 includes a shell body 210 and an end plate 220, the shell body 210 is open at both ends along a first direction, the end plate 220 includes a top plate 221 and a bottom plate 222, and is respectively installed at the two open ends of the shell body 210, the battery module can be inserted into the shell body 210 along the first direction, and the height direction of the cylindrical battery 10 of the battery module is a second direction perpendicular to the first direction. It can be understood that the top plate 221 and the bottom plate 222 of the battery pack form a closed cavity, the cavity is filled with a heat preservation member, which can provide good heat insulation effect and enhance the mechanical properties of the battery pack, and prevent external temperature fluctuations from affecting the performance of the cylindrical battery 10. In addition, the battery module can be inserted into the shell body 210 along the first direction, and the height direction of the cylindrical battery 10 of the battery module is a second direction perpendicular to the first direction. After assembly, the first end 101 and the second end 102 of the cylindrical battery 10 are arranged to align the side wall of the shell body 210, which can improve the compression resistance of the battery pack and improve the safety of the battery pack. Of course, it should be noted that in other embodiments of the present application, the shell 200 is open at one end and closed at the other end along the first direction. At this time, the end plate 220 is one of the top plate 221 or the bottom plate 222.

[0058] The battery module and the battery pack of the present application have the following advantages:

[0059] First: wide temperature range adaptability: through the cooperative action of the first heating member 40 and the second heating member 60 of the first end 101 and the second end 102 of the cylindrical battery 10, the cylindrical battery 10 can be quickly heated in a low temperature environment, and the low temperature performance is improved;

[0060] Second: safety improvement: the gap between the battery module and the shell 200 is filled with foaming glue, which effectively reduces the local temperature extreme change, reduces the risk of thermal runaway, and improves the overall safety of the battery pack;

[0061] Third: energy efficiency improvement: the optimized first heat conducting member 50 and second heat conducting member 70 design makes the heating efficiency higher, reduces unnecessary energy loss, and improves the energy utilization rate of the cylindrical battery 10;

[0062] Fourth: mechanical stability enhancement: the combination of the closed cavity structure and the first support 20 and the second support 30 made of high-strength engineering plastic makes the battery pack have stronger anti-seismic performance and is suitable for complex application scenarios such as motor homes;

[0063] Fifth: prolonging the service life: uniform temperature management and optimized mechanical structure reduce thermal stress and mechanical stress, and improve the service life of the cylindrical battery 10.

[0064] The related parameters of a specific battery pack of the present application and the experimental simulation results thereof are described below.

[0065] The battery pack is composed of 32 cylindrical batteries 10, each with a capacity of 20 Ah and a nominal voltage of 3.2 V, and the total capacity is 3038 Wh. The first heating element 40 (PI film, thickness 0.3 mm) is installed at the top of the battery pack, and the second heating element 60 (silicone film, thickness 1.5 mm) is installed at the bottom, with powers of 150 W and 200 W respectively, to ensure rapid startup at low temperature.

[0066] The internal temperature change of the battery pack under the condition of-20℃ is simulated. The test shows that the temperature of the cylindrical battery 10 rises from-20℃ to 5℃ within 20 minutes and reaches the optimal working temperature of 15℃ within 30 minutes under the condition that the first heating element 40 and the second heating element 60 are turned on at the same time, which proves that the structure of the utility model can effectively improve the performance of the cylindrical battery 10 in a low-temperature environment.

[0067] In actual motor home application tests, the battery pack can continuously supply power for 4 hours in a-10℃ environment, and the internal temperature of the cylindrical battery 10 is maintained at 10℃-15℃, ensuring the normal operation of the cylindrical battery 10. At the same time, compared with the version without foamed glue filling, the temperature fluctuation of the battery pack filled with foamed glue is reduced by about 30%, greatly improving the safety.

[0068] In the description of the specification, the description of the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the implementation manner of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the implementation manners. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A battery module, characterized in that, include: Multiple cylindrical batteries, wherein a positive electrode and a negative electrode are provided at the first end of the cylindrical battery, and a recessed portion is provided at the second end; A first bracket and a second bracket are provided, respectively, with a first insertion hole and a second insertion hole that mate with the first end and the second end. The second bracket has a groove on the side facing away from the first bracket. A first heating element and a first heat-conducting element, wherein the first heating element is installed on the side of the first bracket away from the first end, and the first heat-conducting element is sandwiched between the first bracket and the first heating element; The second heating element and the second heat-conducting element are installed in the groove, and the second heating element is installed on the side of the second bracket away from the first bracket.

2. The battery module according to claim 1, characterized in that, The grooves are arranged in multiple spaced intervals, and each groove contains a second heat-conducting element.

3. The battery module according to claim 1, characterized in that, The first bracket has a first receiving groove on the side opposite to the second bracket. The battery module further includes a connecting strip and a data acquisition board installed in the first receiving groove. The connecting strip is used to connect two adjacent cylindrical batteries, and the data acquisition board is connected to the connecting strip. The first heat-conducting element covers the connecting bar and the acquisition plate.

4. The battery module according to claim 1, characterized in that, The second bracket has a second receiving groove on the side opposite to the first bracket. The second receiving groove is used to receive the second heating element. The groove is provided through the bottom wall of the second receiving groove. One of the bottom wall of the second receiving groove and the second heating element is provided with a positioning hole. The other of the bottom wall of the second receiving groove and the second heating element is provided with a positioning post that cooperates with the positioning hole. The surface of the second heating element opposite to the second heat-conducting element is flush with the surface of the second bracket opposite to the first bracket.

5. The battery module according to claim 1, characterized in that, The thickness of the first thermally conductive element is between 1.5mm and 3mm; and / or, The thickness of the second heat-conducting component is 1.5mm-3mm.

6. The battery module according to claim 1, characterized in that, The battery module further includes a battery control board, which is mounted on the side of the first heating element away from the first heat-conducting element, wherein: The heating power of the first heating element is less than the heating power of the second heating element.

7. The battery module according to claim 6, characterized in that, The thickness of the first heating element is less than the thickness of the second heating element, wherein: The thickness of the first heating element is 0.3mm-0.5mm; and / or, The thickness of the second heating element is 1mm-2mm.

8. A battery pack, characterized in that, It includes a housing and a battery module as described in any one of claims 1-7.

9. The battery pack according to claim 8, characterized in that, The outer casing is filled with an insulating component that encloses the battery module.

10. The battery pack according to claim 8, characterized in that, The outer casing includes a casing body and an end plate. The casing body is open at least one end along a first direction. The end plate is mounted on the open end of the casing body. The battery module can be inserted into the casing body along the first direction, and the height direction of the cylindrical battery of the battery module is a second direction perpendicular to the first direction.

Images