Battery cell heating device and lithium battery equipment

Abstract

The invention relates to a battery cell heating device which comprises a heating component and at least two battery cells, the at least two battery cells are parallel to each other and arranged at intervals, the heating component is arranged between every two adjacent battery cells in a clamped mode, and each heating component comprises a magnetic part and a coil structure. The magnetic part comprises a connecting column, at least two first side columns parallel to each other and at least two second side columns parallel to each other, all the first side columns are connected to the same side of the connecting column, all the second side columns are connected to the other side of the connecting column, and the first side columns and the second side columns abut against the surfaces of the two adjacent battery cells respectively; coil structures are wound on the first side column and the second side column, and the coil structures are used for generating a magnetic field when being electrified, so that the battery cell is arranged in the magnetic field, and eddy current is generated in the battery cell for heating. Therefore, under a certain volume requirement, the battery cell heating device can be provided with more heating components, so that the working performance of the battery cell heating device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery heating, and in particular to a battery cell heating device and a lithium battery device. Background Art

[0002] Lithium battery cells may be affected by low temperature during use, and their electrochemical reactions require certain temperature conditions to proceed normally. Traditional lithium batteries heat the cells by setting up a heating module including an iron core and a coil to generate induced eddy currents inside the cells.

[0003] During production, multiple heating modules need to be assembled in a single lithium battery to improve the performance of the lithium battery.

[0004] However, when assembling multiple heating modules, corresponding mounting components need to be set between adjacent heating modules, resulting in a large assembly gap, which makes the volume of the lithium battery too large. Therefore, under certain lithium battery volume requirements, traditional lithium batteries can only be equipped with a small number of heating modules, thereby limiting the integration density of lithium battery heating modules and resulting in poor lithium battery performance. Summary of the invention

[0005] Based on this, it is necessary to provide a battery cell heating device and a lithium battery device to address the problem of poor performance of traditional lithium batteries.

[0006] On the one hand, the present application provides a battery cell heating device, which includes a heating component and at least two battery cells, wherein the at least two battery cells are parallel to each other and arranged at intervals, and the heating component is sandwiched between two adjacent battery cells, and the heating component includes a magnetic part and a coil structure, wherein the magnetic part includes a connecting column, at least two first side columns parallel to each other, and at least two second side columns parallel to each other, and all the first side columns are connected to the same side of the connecting column, and all the second side columns are connected to the other side of the connecting column, and the first side column and the second side column are respectively abutted against the surfaces of the two adjacent battery cells, and the first side column and the second side column are both wound with the coil structure, and the coil structure is used to generate a magnetic field when power is turned on, so that the battery cell is placed in the magnetic field and eddy currents are generated inside the battery cell for heating.

[0007] The above-mentioned battery cell heating device is based on the first side column and the second side column being respectively connected to the opposite sides of the connecting column, so that the heating component heats two adjacent battery cells at the same time, which is conducive to improving the integrity of the heating component and avoiding the situation where the traditional assembly using two sets of heating modules leads to the appearance of assembly gaps and increases the volume of the device. Therefore, under certain volume requirements, the above-mentioned battery cell heating device can be provided with a larger number of heating components, thereby improving the working performance of the battery cell heating device.

[0008] In one embodiment, the extension direction of the first side column coincides with the extension direction of the second side column, and the first side column is symmetrical with respect to the connecting column and the second side column.

[0009] In one embodiment, the number of the first side pillars and the number of the second side pillars are both 2, the two first side pillars are respectively connected to the two ends of the connecting pillar, and the two second side pillars are respectively connected to the two ends of the connecting pillar.

[0010] In one embodiment, a receiving portion is formed between two adjacent first side pillars or between two adjacent second side pillars, and the receiving portion is used to receive partial structures of two adjacent coil structures.

[0011] In one embodiment, at least two heating components are sandwiched between two adjacent battery cells.

[0012] In one of the embodiments, the battery cell heating device further includes a unilateral heating structure, and among the plurality of battery cells arranged at intervals, two battery cells located at two end positions are respectively abutted against the unilateral heating structure.

[0013] In one embodiment, the unilateral heating structure includes a middle column and at least two lateral columns disposed at intervals, and the plurality of lateral columns are located on the same side of the length direction of the middle column, and the at least two lateral columns are both wound with the coil structure.

[0014] In one embodiment, the coil structure includes a frame and a wire, and the wire is wound around the frame.

[0015] In one embodiment, the frame is provided with a penetrating mounting hole, the first side column or the second side column is passed through the mounting hole, and the first side column or the second side column is in contact with the inner wall of the frame along the circumference of the mounting hole.

[0016] On the other hand, the present application also provides a lithium battery device, comprising the battery cell heating device described in any one of the above embodiments, wherein the battery cell is a lithium battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a battery core heating device in an embodiment of the present application is shown.

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the heating component.

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the single-sided heating structure.

[0020] Description of the Figures

[0021] 10. Battery cell heating device; 100. Heating component; 110. Magnetic member; 111. Connecting column; 112. First side column; 113. Second side column; 110a. Accommodating portion; 120. Coil structure; 120a. Mounting hole; 200. Battery cell; 300. Single-sided heating structure; 310. Middle column; 320. Lateral column. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] In the description of the present application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0027] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0028] See also Figure 1 and Figure 2 , Figure 1 FIG. 1 shows a schematic structural diagram of a battery core heating device 10 in an embodiment of the present application. Figure 2It is a front view of the battery cell heating device 10 . An electric cell heating device 10 provided in an embodiment of the present application includes a heating component 100 and at least two electric cells 200. The at least two electric cells 200 are parallel to each other and arranged at intervals. The heating component 100 is sandwiched between two adjacent electric cells 200. The heating component 100 includes a magnetic member 110 and a coil structure 120. The magnetic member 110 includes a connecting column 111, at least two first side columns 112 parallel to each other, and at least two second side columns 113 parallel to each other. All the first side columns 112 are connected to the same side of the connecting column 111, and all the second side columns 113 are connected to the other side of the connecting column 111. The first side column 112 and the second side column 113 are respectively abutted against the surfaces of the two adjacent electric cells 200. The first side column 112 and the second side column 113 are both wound with the coil structure 120. The coil structure 120 is used to generate a magnetic field when power is turned on, so that the electric cell 200 is placed in the magnetic field and eddy currents are generated inside the electric cell 200 for heating.

[0029] Specifically, the above-mentioned "at least 2" can be 2, 3 or 4, etc., which can be selected according to actual production needs. When multiple first side columns 112 or multiple second side columns 113 are connected to the connecting column 111, maintaining a vertical connection relationship can improve the structural stability of the heating component 100 and is also conducive to layout. The connecting column 111 can be block-shaped, plate-shaped or long strip-shaped, and the first side column 112 or the second side column 113 is arranged at intervals along the length direction of the connecting column 111, so that when the coil structure 120 is sleeved on the first side column 112 or the second side column 113, the coil structure 120 can abut the surface of the connecting column 111. By designing the shape of the connecting column 111, it is also possible to meet certain volume requirements for the device, such as designing the thickness of the connecting column 111, which is conducive to improving the structural compactness of the device.

[0030] The above-mentioned battery cell heating device 10 is based on the first side column 112 and the second side column 113 being respectively connected to the opposite sides of the connecting column 111, so that the heating component 100 heats two adjacent battery cells 200 at the same time, which is conducive to improving the integrity of the heating component 100 and avoiding the situation where the traditional assembly using two sets of heating modules leads to the appearance of assembly gaps and the increase of the device volume. Therefore, under certain volume requirements, the above-mentioned battery cell heating device 10 can be provided with a larger number of heating components 100, thereby improving the working performance of the battery cell heating device 10.

[0031] In addition, the first side column 112 and the second side column 113 of the present application are respectively in contact with the surfaces of two adjacent battery cells 200, so that the principle of electromagnetic induction can be used to generate induced eddy currents inside the battery cell 200 to directly heat the battery cell 200. Compared with conventional heating methods of the battery cell 200 such as resistive or electric heating films, the heating method of the present application using the principle of electromagnetic induction reduces the process of heat transfer through the medium, increases the speed of temperature transfer, and thereby improves the traditional heat transfer efficiency.

[0032] During the production process, in a battery cell heating device 10, in order to improve the performance of the battery cell heating device 10, it is necessary to arrange multiple battery cells 200 and multiple heating components 100. When arranging, the battery cells 200 can be arranged at intervals, and the heating components 100 are sandwiched between the stacked battery cells 200, so that the battery cell heating device 10 has a certain height in the stacking direction. The battery cell heating device 10 of the present application, by arranging the first side column 112 and the second side column 113 on the opposite sides of the connecting column 111, respectively, thereby realizing the collection of the side columns on both sides onto the same connecting column 111, and heating the battery cells 200 on both sides at the same time, which is beneficial to improve the integrity of the heating component 100 and avoid the situation where the battery cell heating device 10 is too high. In addition, since the first side column 112 and the second side column 113 of the present application are assembled on the same connecting column 111, the integration of the device is improved. Therefore, compared with the traditional form of heating module assembly, the present application is beneficial to reducing the installation components required for assembly and reducing costs on the one hand; on the other hand, the integrated magnetic part 110 is also beneficial to improving the magnetic field strength and reducing magnetic loss.

[0033] Furthermore, the assembly form of the traditional heating module is illustrated as follows:

[0034] The traditional heating module including an iron core and a coil has an E-shaped or U-shaped iron core, and can only correspondingly contact the single-sided raised iron column on the single-sided surface of the battery core 200. Therefore, when two adjacent battery cores 200 are arranged at intervals, it is necessary to sandwich two groups of E-shaped or U-shaped iron cores to heat the two battery cores 200 respectively. In order to improve the connection stability of the two groups of iron cores, it is generally necessary to set corresponding mounting components to firmly connect the two groups of E-shaped or U-shaped iron cores. The above arrangement will cause the overall height of the device to be too high. Therefore, compared with the traditional heating module assembly form, the present application scheme improves the integration and integrity of the heating component 100 by combining the first side column 112 and the second side column 113 on both sides onto the same connecting column 111, so that under a certain volume requirement of the battery core heating device 10, a larger number of heating components 100 can be set, thereby improving the working performance of the battery core heating device 10.

[0035] Furthermore, the present application combines the first side column 112 and the second side column 113 on both sides onto the same connecting column 111, so the cross-sectional area of ​​the connecting column 111 can be designed to be larger within a certain volume space. Compared with the traditional magnetic part 110, it can be understood that the connecting columns 111 of the traditional two E-shaped iron cores, or the connecting columns 111 of the two U-shaped iron cores, are combined into one connecting column 111. This setting is conducive to reducing the height of the device on the one hand, and on the other hand, the cross-sectional area of ​​the connecting column 111 of the present application can be designed to be larger, which is conducive to reducing the magnetic density of the electric core heating device 10 of the present application, and reducing magnetic leakage and magnetic loss.

[0036] In some embodiments, the extension directions of the first side column 112 and the second side column 113 coincide, and the first side column 112 is symmetrical about the connecting column 111 and the second side column 113 , which can improve the uniformity of the magnetic field generated by the device, thereby improving the heating performance of the heating component 100 .

[0037] In some embodiments, the number of the first side column 112 and the number of the second side column 113 are both 2, and the two first side columns 112 are respectively connected to the two ends of the connecting column 111, and the two second side columns 113 are respectively connected to the two ends of the connecting column 111. The number of the first side column 112 and the second side column 113 is set to 2, so that the magnetic member 110 is "H" shaped, which is conducive to improving the compactness of the structure of the device. In addition, the connection method of the first side column 112, the second side column 113 and the connecting column 111 can be integrally formed.

[0038] Specifically, compared to the traditional U-shaped iron core structure, the "H"-shaped magnetic member 110 in this embodiment extends two iron core columns from each side of its connecting column 111, and each iron core column is wound with a coil structure 120, so there are two more coil structures 120 than the traditional U-shaped iron core. Such a setting means that the single heating component 100 of the present application can provide more heating units, with better heating effect, and can improve production efficiency. In addition, the cross-section of the connecting column 111 of the H-shaped magnetic member 110 is larger, which is also conducive to reducing magnetic density and reducing magnetic loss.

[0039] In some embodiments, a receiving portion 110a is formed between two adjacent first side pillars 112 or between two adjacent second side pillars 113, and the receiving portion 110a is used to receive a portion of the structure of two adjacent coil structures 120. Specifically, by receiving a portion of the structure of the coil structure 120 in the receiving portion 110a, the magnetic leakage phenomenon of the device can be reduced and the magnetic field strength of the device can be improved.

[0040] In some embodiments, the first side column 112 and the second side column 113 are perpendicular to the connecting column 111, so as to ensure the structural rationality of the device. In addition, the above-mentioned "vertical" setting is conducive to improving the rationality of the arrangement of the heating component 100 in the device and improving the overall compactness of the device.

[0041] In some embodiments, there are at least two heating components 100 sandwiched between two adjacent battery cells 200. By setting multiple heating components 100 to heat simultaneously, the heating performance of the device can be improved. Specifically, multiple heating components 100 can be arranged in a certain sequence, and adjacent heating components 100 are as close to each other as possible, which is conducive to improving the structural compactness of the device. At the same time, when the coil structures 120 are closer to each other, it is also conducive to reducing magnetic leakage and improving the overall magnetic field strength of the device.

[0042] In some embodiments, the battery cell heating device 10 further includes a unilateral heating structure 300. Among the multiple battery cells 200 arranged at intervals, the two battery cells 200 located at the two end positions are respectively abutted with a unilateral heating structure 300, so that the structural rationality of the two ends of the device can be ensured. Specifically, one side of the two battery cells 200 located at the two end positions abuts against the magnetic member 110 of the present application. Since the heating component 100 on the other side of the battery cell 200 located at the end does not have the condition of being clamped between the two battery cells 200, in order to save material costs, a unilateral heating structure is set at the battery cell 200 on the end side to achieve heating of the battery cell 200, which is conducive to controlling production costs and ensuring the structural rationality of the device.

[0043] Further, in some embodiments, the unilateral heating structure 300 includes an intermediate column 310 and at least two lateral columns 320 arranged at intervals, and the plurality of lateral columns 320 are located on the same side of the length direction of the intermediate column 310, and at least two lateral columns 320 are both wound with a coil structure 120. Specifically, the intermediate column 310 can be block-shaped, plate-shaped, or long strip-shaped, and the shape can be designed according to the actual size requirements of the device. In addition, the lateral column 320 is only connected to one side of the intermediate column 310, which is different from the arrangement of the first side column 112 and the second side column 113 on both sides of the heating component 100, so it is conducive to ensuring the compactness and rationality of the structure of the device, saving production costs. It is understandable that the number of lateral columns 320 can be consistent with the number of the first side column 112 or the second side column 113 of the magnetic member 110, so as to ensure the consistency of the overall structure of the device.

[0044] In some embodiments, the coil structure 120 includes a skeleton and a wire, and the wire is wound around the skeleton. Specifically, the shape formed by the wire winding will lead to different magnetic fluxes. Therefore, by setting the skeleton, it is possible to change the shape of the skeleton and then change the shape formed by the wire winding. According to actual production needs, the shape of the skeleton can be designed to facilitate processing and production. In some embodiments, the coil structure 120 also includes insulating materials, etc.

[0045] Furthermore, the skeleton 121 is rectangular. The skeleton is rectangular, so that the coil structure 120 after winding is also rectangular. When multiple heating components 100 are arranged on the surface of the battery core 200, two adjacent heating components 100 can be arranged by abutting each other with the sides of the two coil structures 120, so that the arrangement gap between the two adjacent heating components 100 can be reduced, thereby improving the compactness of the device, reducing magnetic leakage and improving heating efficiency.

[0046] In addition, in some embodiments, the skeleton is elliptical, and the wound coil structure 120 is also elliptical due to the elliptical skeleton. On a single heating component 100, the elliptical setting is conducive to increasing the density of the winding of the wire, that is, under the same volume requirement, the elliptical shape can maximize the number of windings of the wire, thereby facilitating the improvement of the magnetic induction intensity and ensuring the heating effect of the heating component 100.

[0047] In some embodiments, the skeleton is provided with a penetrating mounting hole 120a, the first side column 112 or the second side column 113 is passed through the mounting hole 120a, and the first side column 112 or the second side column 113 is fitted with the inner wall of the skeleton along the circumference of the mounting hole 120a, so that the fit between the magnetic component 110 and the coil structure 120 can be improved, which is beneficial to reduce magnetic leakage and improve the magnetic field strength.

[0048] In some embodiments, the cross section of the mounting hole 120a is square or circular. By limiting the cross section of the mounting hole 120a, it is helpful to improve the versatility of the device, that is, to improve the compatibility between different coil structures 120 and different magnetic parts 110, thereby improving the ease of assembly of the device. It is understandable that the shape of the cross section of the mounting hole 120a can also be adaptively designed according to production requirements.

[0049] In one embodiment, the present application further provides a lithium battery device, comprising the battery cell heating device 10 of any one of the above embodiments, wherein the battery cell 200 is a lithium battery cell.

[0050] The present application provides a lithium battery device, including the battery cell heating device 10 in any of the above embodiments, and the first side column 112 and the second side column 113 are connected to the opposite sides of the connecting column 111, so as to realize the collection of the side columns on both sides onto the same connecting column 111, which is conducive to improving the integrity of the heating component 100, ensuring the compactness of the structure of the lithium battery device, and avoiding the situation in which the traditional assembly using two sets of heating modules causes the assembly gap and increases the volume of the device. Therefore, under certain volume requirements, the above lithium battery device can be provided with a larger number of heating components 100, thereby improving the working performance of the lithium battery device.

[0051] It should be noted that the chemical reaction rate of lithium batteries will become very slow in extremely cold environments, which will lead to problems such as power drop and voltage instability. At the same time, using lithium batteries under low temperature conditions will also lead to uneven deposition of lithium ions, further reducing the performance and life of lithium batteries.

[0052] The lithium battery device of the present application is assembled on the same connecting column 111 through the first side column 112 and the second side column 113 on both sides, so the cross-sectional area of ​​the connecting column 111 can be designed to be larger within a certain volume space. Compared with the traditional magnetic part 110, it can be understood that the connecting columns 111 of the traditional two E-shaped iron cores, or the connecting columns 111 of the two U-shaped iron cores, are assembled into one connecting column 111. On the one hand, this arrangement is conducive to reducing the height of the lithium battery device. On the other hand, the cross-sectional area of ​​the connecting column 111 of the heating component 100 of the lithium battery device of the present application can be designed to be larger, which is conducive to reducing the magnetic density of the battery core heating device 10 of the present application, and reducing magnetic leakage and magnetic loss. Therefore, by improving the heating performance of the lithium battery device, the working reliability of the lithium battery device under extremely cold conditions can also be guaranteed.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery core heating device, characterized in that: The battery cell heating device includes a heating component and at least two battery cells. The at least two battery cells are parallel to each other and arranged at intervals. The heating component is sandwiched between two adjacent battery cells. The heating component includes a magnetic part and a coil structure. The magnetic part includes a connecting column, at least two first side columns parallel to each other, and at least two second side columns parallel to each other. All of the first side columns are connected to the same side of the connecting column, and all of the second side columns are connected to the other side of the connecting column. The first side column and the second side column are respectively abutted against the surfaces of the two adjacent battery cells. The first side column and the second side column are both wound with the coil structure. The coil structure is used to generate a magnetic field when power is turned on, so that the battery cell is placed in the magnetic field and eddy currents are generated inside the battery cell for heating.

2. The electric core heating device according to claim 1, characterized in that: The extension directions of the first side column and the second side column coincide with each other, and the first side column is symmetrical with respect to the connecting column and the second side column.

3. The electric core heating device according to claim 2, characterized in that: The number of the first side pillars and the number of the second side pillars are both 2, the two first side pillars are respectively connected to the two ends of the connecting pillar, and the two second side pillars are respectively connected to the two ends of the connecting pillar.

4. The electric core heating device according to claim 1, characterized in that: A receiving portion is formed between two adjacent first side pillars or between two adjacent second side pillars, and the receiving portion is used to receive partial structures of two adjacent coil structures.

5. The electric core heating device according to claim 1, characterized in that: There are at least two heating components sandwiched between two adjacent battery cells.

6. The electric core heating device according to claim 1, characterized in that: The battery cell heating device further comprises a unilateral heating structure. Among the plurality of battery cells arranged at intervals, two battery cells located at two end positions are respectively abutted against the unilateral heating structure.

7. The electric core heating device according to claim 6, characterized in that: The single-sided heating structure includes a middle column and at least two lateral columns arranged at intervals, and the plurality of lateral columns are located on the same side of the length direction of the middle column, and the at least two lateral columns are both wound with the coil structure.

8. The electric core heating device according to claim 1, characterized in that: The coil structure includes a frame and a wire, and the wire is wound around the frame.

9. The electric core heating device according to claim 8, characterized in that: The frame is provided with a penetrating mounting hole, the first side column or the second side column is penetrated through the mounting hole, and the first side column or the second side column is in contact with the inner wall of the frame along the circumference of the mounting hole.

10. A lithium battery device, comprising the battery core heating device according to any one of claims 1 to 9, characterized in that: The battery cell is a lithium battery cell.

Images