Battery module
By combining the first heating member and the heat conducting member at the end of the battery cell of the battery module, the problem of degradation of heat dissipation performance during heating of the battery module is solved, and efficient temperature control and low-cost battery cell temperature uniformity are achieved.
Patent Information
- Application Number
- CN202420031576.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-05
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-05
AI Technical Summary
Existing battery modules are likely to hinder heat dissipation when heating the battery cell, affecting the overall heat dissipation performance of the battery module, especially when the battery cell temperature is too high.
A battery module is designed, using a first heating member and a thermal conductor. The first heating member is located at the end of the battery cell. The thermal conductor is connected to the positive electrode and the negative electrode of the battery cell to conduct heat to improve the temperature control efficiency, and Reduce the effect on heat dissipation through the adapted shape and size.
It realizes that the heat dissipation performance is not affected while heating the battery cell, reduces assembly difficulty and cost, and improves the efficiency of temperature control and the working temperature uniformity of the battery cell.
Smart Images
Figure CN222190922U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a battery module. Background Art
[0002] The battery module contains battery cells, which require a suitable operating temperature for normal operation. When the battery cell temperature is too low or too high, it will affect the use of the battery cell.
[0003] In the related art, by wrapping a heating film around the outer wall of the battery cell, the battery cell can be heated when the battery cell temperature is low, so that the battery module is heated to a better working temperature. However, when the battery cell temperature is high, the heating film will block the heat dissipation of the battery cell, thereby affecting the heat dissipation performance of the battery module. Utility Model Content
[0004] The embodiment of the present application provides a battery module that can heat a battery cell with little effect on the heat dissipation of the battery cell.
[0005] In a first aspect, an embodiment of the present application provides a battery module, comprising a battery cell assembly and a first heating assembly, the battery cell assembly comprising a plurality of battery cells arranged along a first direction, the battery cell assembly having a first end and a second end opposite to each other in the first direction, the positive electrodes of a portion of the battery cells being located at the first end, and the negative electrodes of another portion of the battery cells being located at the first end; the first heating assembly is arranged at the first end, the first heating assembly comprising a first heating element and a heat conductive element connected to the first heating element; wherein the heat conductive element comprises a first heat conductive element, a second heat conductive element and a third heat conductive element, all of which are connected to the first heating element, the first heat conductive element is connected to the positive electrode of one of the plurality of battery cells, the second heat conductive element is connected to the negative electrode of another of the plurality of battery cells, and the third heat conductive element is connected to the positive electrode of one of the remaining battery cells and the negative electrode of another adjacent battery cell.
[0006] Beneficial effect: The first heating element in the embodiment of the present application is located at the end of the battery cell in conjunction with the heat conductive element, so the first heating element will not fill the gap between the battery cells, that is, the first heating element has very little effect on the heat dissipation of the battery cell. At the same time, the heat conductive element makes the heat conduction effect better and improves the temperature control efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0008] Figure 1This is a schematic diagram of the structure of a battery module in one embodiment of the present application;
[0009] Figure 2 This is a schematic diagram of the structure of a battery module in another embodiment of the present application;
[0010] Figure 3 This is a schematic diagram of the structure of a battery module in another embodiment of the present application;
[0011] Figure 4 This is a schematic structural diagram of the third heat conducting member cooperating with a portion of the battery core frame in one embodiment of the present application;
[0012] Figure 5 This is a schematic diagram of the structure of a heat conducting member in one embodiment of the present application;
[0013] Figure 6 This is a schematic structural diagram of a first heating component in one embodiment of the present application;
[0014] Figure 7 This is a schematic structural diagram of a first heating element in one embodiment of the present application;
[0015] Figure 8 This is a schematic structural diagram of a first heating element in another embodiment of the present application;
[0016] Fig. 9 This is a schematic structural diagram of a first heating component in yet another embodiment of the present application.
[0017] Explanation of reference numerals: 100, battery module; 110, battery cell assembly; 111, battery cell; 112, first end; 113, second end; 120, first heating assembly; 121, first heating element; 121a, first heating area; 121b, second heating area; 121c, third heating area; 1211, first insulating layer; 1212, second insulating layer; 1213, heating wire; 122, first heat-conducting element; 1221, first connecting portion; 1222, first extending portion; 123, second heat-conducting element; 1231, third Second connecting part; 1232, second extending part; 124, third heat conducting member; 124a, limiting hole; 124b, limiting groove; 1241, third connecting part; 1242, middle part; 1243, fourth connecting part; 1244, detection pin; 131, second heating member; 140, battery cell frame; 140a, first card slot; 140b, second card slot; 140c, third card slot; 141, limiting column; 142, limiting protrusion; 143, convex ridge; 150, battery management module; 160, fan; AA, first direction. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0019] like Figure 1-3 As shown, the embodiment of the present application provides a battery module 100 , which can be applied to portable outdoor power supplies, power batteries and other devices. The battery module 100 includes a battery cell assembly 110 and a first heating assembly 120 .
[0020] The battery cell assembly 110 includes a plurality of battery cells 111 extending along a first direction AA, wherein all two adjacent battery cells 111 are spaced apart in a direction perpendicular to the first direction AA, or all two adjacent battery cells 111 are in contact with each other, or a portion of two battery cells 111 are spaced apart in a direction perpendicular to the first direction AA, and another portion of two adjacent battery cells 111 are in contact with each other. Optionally, all two adjacent battery cells 111 are spaced apart in a direction perpendicular to the first direction AA, so that there is a better heat dissipation effect between the two adjacent battery cells 111, and mutual compression between the two adjacent battery cells 111 can be avoided as much as possible. Exemplarily, all battery cells 111 are spaced apart in a direction perpendicular to the first direction AA, and the direction perpendicular to the first direction AA has a plurality of different directions, and all battery cells 111 can be gathered and spaced apart in these plurality of directions. Exemplarily, the shape of the battery cells 111 can be a cylindrical battery cell 111, a square battery cell 111, etc. Figure 2 As shown, the battery cell assembly 110 has a first end 112 and a second end 113 opposite to each other in the first direction AA, the positive electrodes of a part of the battery cells 111 are located at the first end 112, and the negative electrodes are located at the second end 113, and the negative electrodes of another part of the battery cells 111 are located at the first end 112, and the positive electrodes are located at the second end 113. The series-parallel connection mode of the battery cells 111 can be set according to actual needs, and the battery cells 111 can be all connected in series, or all connected in parallel, or the battery cells 111 can be mixed in series and parallel. The first direction AA can be the length direction of the battery cell assembly 110.
[0021] The first heating assembly 120 is disposed at the first end 112. The first heating assembly 120 includes a first heating element 121 and a heat conductive element. The heat conductive element is connected to the first heating element 121. The first heating element 121 is connected to all the battery cells 111. The heat conductive element is sandwiched between the battery cells 111 and the first heating element 121. The first heating element 121 is used to generate heat. The heat conductive element is used to conduct the heat generated by the first heating element 121 to all the battery cells 111, so that each battery cell 111 can be heated up, so that the battery cell assembly 110 is at a better working temperature. It can be understood that a temperature sensor can be provided on the surface of at least part of the battery cells 111 to monitor the temperature of the battery cells 111, so that the first heating assembly 120 can be turned on or off according to the temperature of the battery cells 111, or the heating power of the first heating assembly 120 can be adjusted.
[0022] The first heating element 121 in the embodiment of the present application is located at the end of the battery cell 111 in conjunction with the heat conducting element, so the first heating element 121 will not fill the gap between the battery cells 111, that is, the first heating element 121 has very little effect on the heat dissipation of the battery cell 111. Moreover, in the related art, it is usually troublesome to wrap the heating film around the outer wall of the battery cell 111, and there are high requirements for the assembly process. Moreover, since the heating film is wrapped around each battery cell 111 one by one, the area of the heating film is large and the cost is high. However, the first heating element 121 in the embodiment of the present application is located at the end of the battery cell 111, and can cover each battery cell 111, so that the temperature difference between each battery cell 111 is small, and the assembly difficulty is low. At the same time, since the end surface area of the battery cell 111 is often smaller than the area of the outer wall, compared with covering the outer wall of the battery cell 111, when the first heating element 121 is arranged on the end surface of the battery cell 111, the first heating element 121 can achieve the coverage of the end surface of the battery cell 111 with a relatively small area, so the cost of the first heating element 121 is low.
[0023] In some embodiments, the shape and size of the end of the heat conductor are adapted to the battery cell 111, and the first heating element 121 is adapted to the shape and size of the end of the heat conductor. Specifically, the shape and size of the first heat conductor 122 used to connect with the corresponding battery cell 111 are adapted to the shape and size of the end face of the corresponding battery cell 111, the shape and size of the second heat conductor 123 used to connect with the corresponding battery cell 111 are adapted to the shape and size of the end face of the corresponding battery cell 111, and the shape and size of the third heat conductor 124 used to connect with the corresponding battery cell 111 are adapted to the shape and size of the end face of the corresponding battery cell 111. Adaptation means that the shapes are exactly the same or the shapes are not exactly corresponding but the deviation is small, and the sizes are exactly the same, or slightly larger, or slightly smaller, so that the size of the heat conductor will not be too large and the heat conduction effect will not be affected.
[0024] For example, the shape and size of the portion of the first heat conductor 122 that is connected to the corresponding battery cell 111 are the same as the shape and size of the end face of the corresponding battery cell 111, so that the first heat conductor 122 can completely cover the end face of the battery cell 111, and the first heat conductor 122 and the end face of the battery cell 111 have a large contact area, so that the first heat conductor 122 and the battery cell 111 have a better thermal conductivity effect, and the size of the first heat conductor 122 is not too large.
[0025] The shape and size of the portion of the second heat conductor 123 that is used to connect with the corresponding battery cell 111 are the same as the shape and size of the end face of the corresponding battery cell 111, so that the second heat conductor 123 can completely cover the end face of the battery cell 111, and the second heat conductor 123 and the end face of the battery cell 111 have a large contact area, so that the second heat conductor 123 and the battery cell 111 have a good heat conduction effect, and the size of the second heat conductor 123 is not too large.
[0026] The shape and size of the portion of the third heat conductor 124 used for connection with the corresponding battery cell 111 are the same as the shape and size of the end face of the corresponding battery cell 111, so that the third heat conductor 124 can completely cover the end face of the battery cell 111, and the third heat conductor 124 and the end face of the battery cell 111 have a large contact area, so that the third heat conductor 124 and the battery cell 111 have a good heat conduction effect, and the size of the third heat conductor 124 is not too large.
[0027] Of course, the sizes of the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 can also be slightly larger than or larger than the end face size of the corresponding battery cell 111 within a smaller gap range. The first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 can also completely cover the end face of the battery cell 111.
[0028] like Figure 2 and Figure 3As shown, in some embodiments, the heat conductor has three types, and illustratively, the heat conductor includes a first heat conductor 122, a second heat conductor 123, and a third heat conductor 124. The first heat conductor 122, the second heat conductor 123, and the third heat conductor 124 are all connected to the first heating element 121, the first heat conductor 122 is connected to the positive electrode of one of the battery cells 111 among all the battery cells 111, the second heat conductor 123 is connected to the negative electrode of another of the battery cells 111 among all the battery cells 111, and the third heat conductor 124 is connected to the positive electrode of one of the battery cells 111 and the negative electrode of another adjacent battery cell 111 among the remaining battery cells 111. The first heat conductor 122, the second heat conductor 123, and the third heat conductor 124 can all be made of metal sheets, such as copper alloys, nickel, aluminum, and other metal sheets. The first heating element 121 transfers heat to the corresponding battery cell 111 through the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124, thereby improving the heat conduction effect and thus increasing the heating rate of the battery cell 111. The first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 all play the role of heat conduction and electricity conduction at the same time, so there is no additional cost. It is understandable that according to different series and parallel connection methods, the type of heat conductor can also be in other forms, such as a single heat conductor is connected to the positive or negative electrodes of multiple battery cells 111 at the same time, which is not limited here.
[0029] The first heat conductor 122 can be used as the positive lead-out terminal of the battery cell assembly 110, and the second heat conductor 123 can be used as the negative lead-out terminal of the battery cell assembly 110. The positive lead-out terminal and the negative lead-out terminal are used to connect to the circuit outside the battery cell assembly 110. The third heat conductor 124 can be used as an electrical connection sheet between multiple battery cells 111, so that the multiple battery cells 111 can be connected in series and parallel in a predetermined manner. The number of the first heat conductor 122 is one, the number of the second heat conductor 123 is one, and the number of the third heat conductor 124 can be one or more. The orientations of the multiple third heat conductors 124 can be the same or different, and can be set according to actual needs.
[0030] The first heat conductor 122 can be connected to the battery cell 111 located at the periphery among the multiple battery cells 111, so that the first heat conductor 122 can be extended to the outside of the battery cell assembly 110, and the size of the first heat conductor 122 can be set relatively small, while trying to avoid the short circuit risk caused by the first heat conductor 122 crossing over other battery cells 111. The second heat conductor 123 can be connected to the battery cell 111 located at the periphery among the multiple battery cells 111, so that the second heat conductor 123 can be extended to the outside of the battery cell assembly 110, and the size of the second heat conductor 123 can be set relatively small, while trying to avoid the short circuit risk caused by the second heat conductor 123 crossing over other battery cells 111. The third heat conductor 124 is connected to two adjacent battery cells 111, so as to avoid the third heat conductor 124 crossing over other battery cells 111 and reduce the risk of short circuit.
[0031] It is understandable that, since the first heat conductor 122 , the second heat conductor 123 and the third heat conductor 124 are connected to different battery cells 111 , the first heat conductor 122 , the second heat conductor 123 and the third heat conductor 124 need to be spaced apart from each other to avoid short circuits between different battery cells 111 .
[0032] like Figure 3 As shown, in some embodiments, the battery module 100 further includes a cell frame 140, each cell 111 is disposed in the cell frame 140, and a first slot 140a, a second slot 140b, and a third slot 140c are disposed on the cell frame 140, the first heat conductive member 122 is engaged with the first slot 140a, the second heat conductive member 123 is engaged with the second slot 140b, and the third heat conductive member 124 is engaged with the third slot 140c. The first slot 140a, the second slot 140b, and the third slot 140c respectively play a certain fixing effect on the first heat conductive member 122, the second heat conductive member 123, and the third heat conductive member 124, so that the relative positions of the first heat conductive member 122, the second heat conductive member 123, and the third heat conductive member 124 and the corresponding cell 111 can be limited, and the occupied space can also be saved. Before fixing the first heat-conducting member 122, the second heat-conducting member 123 and the third heat-conducting member 124, the first heat-conducting member 122, the second heat-conducting member 123 and the third heat-conducting member 124 can be respectively connected to the first card slot 140a, the second card slot 140b and the third card slot 140c, and then the first heat-conducting member 122, the second heat-conducting member 123 and the third heat-conducting member 124 are further fixed by welding or other methods. Moreover, the first card slot 140a, the second card slot 140b and the third card slot 140c can play a certain isolation effect, so as to isolate the first heat-conducting member 122, the second heat-conducting member 123 and the third heat-conducting member 124 from each other, so that the first heat-conducting member 122, the second heat-conducting member 123 and the third heat-conducting member 124 have better insulation.
[0033] Exemplarily, the cell frame 140 is provided with a convex ridge 143 protruding along the first direction AA, and the convex ridge 143 forms a first slot 140a, a second slot 140b and a third slot 140c. The third slot 140c is fixed to the third heat conducting member 124 as shown in FIG. Figure 4 As shown, a limiting column 141 is provided on the cell frame 140 , a limiting protrusion 142 is provided on the inner wall surface 143 of the convex ridge, and a limiting hole 124 a matched with the limiting column 141 and a limiting groove 124 b matched with the limiting protrusion 142 are provided on the third heat conducting member 124 .
[0034] In some embodiments, the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 are all connected to the battery cell 111 by welding, and the type of welding can be resistance welding or laser welding. Alternatively, the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 are all bonded to the battery cell 111, for example, the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 are bonded to the battery cell 111 through conductive adhesive. Alternatively, the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 are all mechanically fixedly connected to the battery cell 111, for example, the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 are pressed by the shell of the battery module 100 to fit the battery cell 111, or the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 are clamped with the battery cell frame 140 and fit the battery cell 111.
[0035] like Figure 5 As shown, in some embodiments, the first heat conductor 122 includes a first connection portion 1221 and a first extension portion 1222, and the first connection portion 1221 is connected to the first extension portion 1222. The first connection portion 1221 is connected to the positive electrode of the corresponding battery cell 111, for example, the first connection portion 1221 is welded to the positive electrode of the corresponding battery cell 111. The first extension portion 1222 extends to the outside of the battery cell assembly 110. Optionally, the shape and size of the first connection portion 1221 are adapted to the shape and size of the end surface of the first end 112 of the corresponding battery cell 111.
[0036] The second heat conductor 123 includes a second connection portion 1231 and a second extension portion 1232, and the second connection portion 1231 is connected to the second extension portion 1232. The second connection portion 1231 is connected to the negative electrode of the corresponding battery cell 111, for example, the second connection portion 1231 is welded to the negative electrode of the corresponding battery cell 111. The second extension portion 1232 extends to the outside of the battery cell assembly 110, and the first extension portion 1222 is spaced from the second extension portion 1232. Optionally, the shape and size of the second connection portion 1231 are adapted to the shape and size of the end face of the first end 112 of the corresponding battery cell 111.
[0037] The third heat-conducting member 124 includes a third connecting portion 1241, a middle portion 1242 and a fourth connecting portion 1243 in sequence, and the two ends of the middle portion 1242 are connected to the third connecting portion 1241 and the fourth connecting portion 1243 respectively. The third connecting portion 1241 is connected to the positive electrode of the corresponding battery cell 111, and the fourth connecting portion 1243 is connected to the negative electrode of the corresponding battery cell 111. The third heat-conducting member 124 also includes a detection pin 1244, which is connected to the middle portion 1242. The detection pin 1244 is used to connect to the external circuit of the battery cell assembly to detect the voltage of the third heat-conducting member 124. Optionally, the shape and size of the third connecting portion 1241 and the fourth connecting portion 1243 are adapted to the shape and size of the end face of the first end 112 of the corresponding battery cell 111.
[0038] like Figure 6 As shown, in some embodiments, the first heating element 121 has a first heating area 121a, a second heating area 121b and a third heating area 121c, and the first heating area 121a, the second heating area 121b and the third heating area 121c are arranged at intervals. The area other than the first heating area 121a, the second heating area 121b and the third heating area 121c on the first heating element 121 is a non-heating area. The outer contour of the first heating area 121a is adapted to the shape and size of the first heat-conducting member 122, the outer contour of the second heating area 121b is adapted to the shape and size of the second heat-conducting member 123, and the outer contour of the third heating area 121c is adapted to the shape and size of the third heat-conducting member 124. For example, the outer contour of the first heating area 121a is exactly the same as the shape of the first heat-conducting member 122, or the shape does not completely correspond but the deviation is small, and the size is exactly the same, or slightly larger, or slightly smaller. The outer contour of the second heating area 121b is exactly the same as the shape of the second heat-conducting member 123, or the shape does not completely correspond but the deviation is small, and the size is exactly the same, or slightly larger, or slightly smaller. The outer contour of the third heating area 121c is exactly the same as the shape of the third heat-conducting member 124, or the shape does not completely correspond but the deviation is small, and the size is exactly the same, or slightly larger, or slightly smaller. The interval area between the first heat-conducting member 122, the second heat-conducting member 123 and the third heat-conducting member 124 corresponds to the non-heating area. In this way, the use of heating materials in the first heating member 121 can be reduced, and the cost can be reduced as much as possible while ensuring that a certain heating rate is achieved.
[0039] It should be noted that since the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 may not completely cover the end surface of the first end 112 of the corresponding battery cell 111 when they are respectively connected to the corresponding battery cell 111, the first heating area 121a, the second heating area 121b and the third heating area 121c can be appropriately expanded so that the first heating area 121a, the second heating area 121b and the third heating area 121c not only correspond to the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 respectively, but also correspond to the area of the first end 112 of the corresponding battery cell 111 that is not covered by the heat conductor, so that the first heating area 121a, the second heating area 121b and the third heating area 121c can heat the area of the first end 112 of the corresponding battery cell 111 that is not covered by the heat conductor, thereby further improving the heating speed of the battery cell 111 and making the temperature of each part of the single battery cell 111 more uniform.
[0040] like Figure 6 and Figure 7 As shown, in some embodiments, the first heating element 121 includes heating wires 1213 disposed in the first heating area 121a, the second heating area 121b and the third heating area 121c. The heating wires 1213 have a relatively lower cost, a thinner thickness and a stronger bending ability. Figure 6 As shown, the heating wire 1213 is only arranged in the area where the first heating element 121 contacts the heat conducting element, so that the use of the heating wire 1213 on the first heating element 121 can be reduced, so that the heat generation is more concentrated and the cost can be reduced. In order to correspond to the shape and size of the heat conducting element, the direction of the heating wire 1213 can be inclined. Optionally, the heating wire 1213 can be replaced by a heating plate, which has a higher heat generation, more uniform heat generation, and a longer life.
[0041] like Figure 8 As shown, in some embodiments, the heating wire 1213 fills the entire area of the first heating element 121 , thereby maximizing the heating power and increasing the heating speed of the battery cell 111 .
[0042] like Fig. 9As shown, in some embodiments, the first heating element 121 includes a first insulating layer 1211, a second insulating layer 1212 and a heating wire 1213. The first insulating layer 1211 can be a film made of polyester material, and the second insulating layer 1212 can also be a film made of polyester material, that is, the second insulating layer 1212 is made of the same material as the first insulating layer 1211, thereby reducing costs. Polyester has good heat resistance, thereby ensuring that the first insulating layer 1211 and the second insulating layer 1212 will not be melted when the heating wire 1213 is heated. The heating wire 1213 can be a resistance wire, which generates heat when powered on. The amount of electricity required for heating the first heating element 121 can be provided by the battery cell 111 of the battery module 100, or by other external power sources. The second insulating layer 1212 is bonded to the first insulating layer 1211, and the specific bonding method of the second insulating layer 1212 and the first insulating layer 1211 can be bonding or hot melting. The heating wire 1213 is sandwiched between the first insulating layer 1211 and the second insulating layer 1212, so that the heating wire 1213 is insulated from the first heat conductive member 122, the second heat conductive member 123 and the third heat conductive member 124, thereby preventing a short circuit between the heating wire 1213 and the first heat conductive member 122, the second heat conductive member 123 and the third heat conductive member 124. The first heat conductive member 122, the second heat conductive member 123 and the third heat conductive member 124 are respectively connected to different positions of the first insulating layer 1211.
[0043] It is understandable that the specific shapes of the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 can be set according to actual needs, so the shape of the first heat conductor 122 may be regular or irregular, the shape of the second heat conductor 123 may be regular or irregular, and the shape of the third heat conductor 124 may be regular or irregular. For example, the contour shape and size of the heating wire 1213 located in the first heating area 121a can be the same or substantially the same as the shape and size of the first heat conductor 122, the contour shape and size of the heating wire 1213 located in the second heating area 121b can be the same or substantially the same as the shape and size of the second heat conductor 123, and the contour shape and size of the heating wire 1213 located in the third heating area 121c can be the same or substantially the same as the shape and size of the third heat conductor 124. The heating wires 1213 located in the contour can be adjacent to each other or there can be a certain gap.
[0044] In some embodiments, the outer contour shape of the heating wire 1213 wound corresponding to the first heating area 121a is any one of regular shapes such as parallelogram, circle, ellipse, trapezoid, triangle, or other irregular shapes, and only needs to be roughly the same as the first heat conductor 122. The outer contour shape of the heating wire 1213 wound corresponding to the second heating area 121b is any one of regular shapes such as parallelogram, circle, ellipse, trapezoid, triangle, or other irregular shapes, and only needs to be roughly the same as the second heat conductor 123. The outer contour shape of the heating wire 1213 wound corresponding to the third heating area 121c is any one of regular shapes such as parallelogram, circle, ellipse, trapezoid, triangle, or other irregular shapes, and only needs to be roughly the same as the third heat conductor 124.
[0045] The heating wire 1213 can be wound in a manner of winding from the center to the periphery, and the bending curvature of the heating wire 1213 is relatively small. The heating wire 1213 can also be wound in a multi-row superimposed manner, and the power lead of the heating wire 1213 is easier to set. Of course, there are other winding methods for the heating wire 1213, which are not limited here. In the present embodiment, different winding methods can meet the requirements, and a specific winding method can be selected according to actual needs. Depending on the density of the heating wire 1213 winding, there may be gaps or no gaps between the heating wires 1213.
[0046] In some embodiments, the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 are all attached to the first heating element 121. The first heat conductor 122, the second heat conductor 123 and the third heat conductor 124 can be attached to the first heating element 121 through an adhesive, for example, an adhesive layer is provided on the first insulating layer 1211, so that the first insulating layer 1211 is bonded to the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124. The adhesive layer can cover the entire area of the first insulating layer 1211, so that the adhesive layer can be connected not only to the first heat conductor 122, the second heat conductor 123 and the third heat conductor 124, but also to other components such as the battery cell 111 and the battery cell 111 frame.
[0047] Alternatively, the first heat conductive member 122, the second heat conductive member 123 and the third heat conductive member 124 may be fitted with the first heating member 121 under the action of an external force, for example, the outer shell of the battery module 100 presses the first heating member 121 to contact the first heat conductive member 122, the second heat conductive member 123 and the third heat conductive member 124, and makes the first heating member 121 fit tightly with the first heat conductive member 122, the second heat conductive member 123 and the third heat conductive member 124.
[0048] like Figure 1As shown, in some embodiments, the battery module 100 further includes a second heating assembly, which is disposed at the second end 113. The second heating assembly includes a second heating member 131 and a fourth heat conducting member (not shown in the figure) connected to the second heating member 131, and the fourth heat conducting member is connected to the positive electrode of one of the multiple battery cells 111 and the negative electrode of another adjacent battery cell 111. By arranging heating assemblies at both ends of the battery cell 111, the heating speed of the battery cell 111 is faster, and the temperature difference of each part of the battery cell 111 is smaller. The shape of the fourth heat conducting member can be the same as that of the third heat conducting member 124, thereby saving manufacturing costs.
[0049] like Figure 3 As shown, in some embodiments, the battery module 100 also includes a battery management module 150, which is disposed on the battery cell 111 frame. The battery management module 150 is connected to the first heat conductor 122 and the second heat conductor 123, and the battery management module 150 is used to manage the charging and discharging of the battery cell assembly 110.
[0050] like Figure 3 As shown, in some embodiments, the battery module 100 further includes a fan 160, which is disposed on the battery cell frame 140, and the air outlet direction of the fan 160 is toward the multiple battery cells 111, that is, the air outlet direction of the fan 160 is perpendicular to the first direction AA. When the temperature of the battery cell 111 is too high, the fan 160 is started to cool the battery cell 111.
[0051] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0052] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A battery module, characterized in that: include: A battery cell assembly, comprising a plurality of battery cells arranged along a first direction, wherein the battery cell assembly has a first end and a second end opposite to each other in the first direction, wherein positive electrodes of a portion of the battery cells are located at the first end, and negative electrodes of another portion of the battery cells are located at the first end; A first heating assembly, disposed at the first end, the first heating assembly comprising a first heating element and a heat conducting element connected to the first heating element; Among them, the heat conductive member includes a first heat conductive member, a second heat conductive member and a third heat conductive member, all of which are connected to the first heating member, the first heat conductive member is connected to the positive electrode of one of the multiple battery cells, the second heat conductive member is connected to the negative electrode of another of the multiple battery cells, and the third heat conductive member is connected to the positive electrode of one of the remaining battery cells and the negative electrode of another adjacent battery cell.
2. The battery module according to claim 1, characterized in that: The first heating element has a first heating area, a second heating area and a third heating area. The outer contour of the first heating area is adapted to the shape and size of the first heat-conducting element, the outer contour of the second heating area is adapted to the shape and size of the second heat-conducting element, and the outer contour of the third heating area is adapted to the shape and size of the third heat-conducting element.
3. The battery module according to claim 2, characterized in that: The first heating element includes heating wires arranged in the first heating area, the second heating area and the third heating area; Or the first heating element includes heating plates arranged in the first heating area, the second heating area and the third heating area.
4. The battery module according to claim 3, characterized in that: The shape of the heating wire wound corresponding to the first heating area is at least one of a parallelogram, a circle, an ellipse, a trapezoid, and a triangle; and / or the shape of the heating wire wound corresponding to the second heating area is at least one of a parallelogram, a circle, an ellipse, a trapezoid, and a triangle; and / or the shape of the heating wire wound corresponding to the third heating area is at least one of a parallelogram, a circle, an ellipse, a trapezoid, and a triangle.
5. The battery module according to claim 1, characterized in that: The battery module also includes a second heating component arranged at the second end, the second heating component includes a second heating element and a fourth heat conductive element connected to the second heating element, and the fourth heat conductive element is connected to the positive electrode of one of the multiple battery cells and the negative electrode of another adjacent battery cell.
6. The battery module according to claim 1, characterized in that: The first heating element comprises: a first insulating layer; a second insulating layer, attached to the first insulating layer; A heating wire, sandwiched between the first insulating layer and the second insulating layer; The first heat conducting member, the second heat conducting member and the third heat conducting member are respectively connected to different positions of the first insulating layer.
7. The battery module according to claim 1, characterized in that: The first heat-conducting member, the second heat-conducting member and the third heat-conducting member are respectively attached to the first heating member.
8. The battery module according to claim 1, characterized in that: The first heat conducting member comprises a first connecting portion and a first extending portion connected to the first connecting portion, the first connecting portion is connected to the positive electrode of the corresponding battery cell, and the first extending portion extends to the outside of the battery cell assembly; and / or, The second heat conducting member comprises a second connecting portion and a second extending portion connected to the second connecting portion, the second connecting portion is connected to the negative electrode of the corresponding battery cell, the second extending portion extends to the outside of the battery cell assembly, and the first extending portion is spaced apart from the second extending portion; and / or, The third heat conductor includes a third connection part, a middle part and a fourth connection part which are connected in sequence, two ends of the middle part are respectively connected to the third connection part and the fourth connection part, the third connection part is connected to the positive electrode of the corresponding battery cell, and the fourth connection part is connected to the negative electrode of the corresponding battery cell.
9. The battery module according to claim 1, characterized in that: The first heat conductor is adapted to the shape and size of the end face corresponding to the first end of the battery cell, the second heat conductor is adapted to the shape and size of the end face corresponding to the first end of the battery cell, and the third heat conductor is adapted to the shape and size of the end face corresponding to the first end of the battery cell.
10. The battery module according to any one of claims 1 to 9, characterized in that: Also includes: A cell frame, wherein all the cells are arranged in the cell frame, and a first card slot, a second card slot and a third card slot are arranged on the cell frame, the first heat conductive member is card-connected with the first card slot, the second heat conductive member is card-connected with the second card slot, and the third heat conductive member is card-connected with the third card slot.
11. The battery module according to claim 10, characterized in that: The battery module further includes a battery management module, the battery management module is disposed on the battery core frame, and the battery management module is connected to the first heat conductive member and the second heat conductive member; and / or, The battery module further includes a fan, which is disposed on the battery cell frame and has an air outlet direction toward the plurality of battery cells.