Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack. The positive pole lug and the negative pole lug of each battery cell are respectively arranged at two opposite ends of each battery cell along the length direction of the main body, and in two adjacent battery cells, the positive pole lug of one battery cell and the negative pole lug of the other battery cell are positioned on the same side of the main body. The positive pole lug of the first battery cell is electrically connected with the negative pole lug of the second battery cell through a first busbar, and the positive pole lug of the second battery cell is electrically connected with the negative pole lug of the third battery cell through a second busbar. Each first busbar is connected with a first sampling line, and each second busbar is connected with a second sampling line. In the two battery cells connected with the second busbar, a conductive piece is arranged on the battery cell assembly where at least one battery cell is located, the conductive piece extends in the length direction of the main body, and the conductive piece is electrically connected with the second sampling line. According to the invention, the problem that the connection operation of the sampling line between the battery module and the battery management system is inconvenient is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soft package battery, in particular to a battery module and a battery pack. BACKGROUND

[0002] The battery module realizes the electrical connection between multiple battery monomers through busbars. The positive and negative tabs of the battery monomers are respectively located on the opposite sides of the battery monomers. When multiple battery monomers are stacked in series, the busbars are distributed on the opposite sides of the battery module. When the voltage of the battery module is sampled, a sampling line needs to be drawn from each busbar, and then each sampling line is connected to the battery management system (BMS) through a connector. However, this sampling method causes the sampling lines to be distributed on the opposite sides of the battery module, resulting in complex wiring of the sampling lines and inconvenience in connecting the sampling lines between the battery module and the battery management system. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a battery module and a battery pack to solve the problem of inconvenience in connecting the sampling lines between the battery module and the battery management system mentioned in the background.

[0004] According to one aspect of the present application, a battery module is provided, comprising:

[0005] a main body comprising a plurality of cell assemblies, the plurality of cell assemblies being sequentially stacked along the height direction of the main body, each cell assembly being provided with a cell, the positive and negative tabs of each cell being respectively arranged at the opposite ends of the cell along the length direction of the main body, and the positive tab of one of the two adjacent cells and the negative tab of the other being located on the same side of the main body;

[0006] along the height direction of the main body, the adjacent three cells are sequentially a first cell, a second cell and a third cell, the positive tab of the first cell and the negative tab of the second cell being electrically connected by a first busbar, and the positive tab of the second cell and the negative tab of the third cell being electrically connected by a second busbar; each first busbar is located on the same side of the main body, each second busbar is located on the same side of the main body, each first busbar is connected with a first sampling line, and each second busbar is connected with a second sampling line;

[0007] wherein, of the two cells connected with the second busbar, at least one cell is provided with a conductive member on the cell assembly where the cell is located, the conductive member extends along the length direction of the main body, and the conductive member is electrically connected with the second sampling line.

[0008] Further, the conductive member comprises:

[0009] A wire is fixed to the battery cell assembly, the wire comprises a first end and a second end, the first end is electrically connected to one end of the second sampling wire away from the second busbar, and the second end extends to outside of the battery cell assembly along the length direction of the main body.

[0010] Further, the battery cell assembly further comprises:

[0011] A support frame, opposite sides of the support frame along the width direction of the main body are provided with bent flanges, the bent flanges extend along the length of the wire, and the wire is fixed to the bent flanges.

[0012] Further, the support frame is provided with the battery cell, the battery cell abuts against the bent flanges along opposite sides of the width direction of the main body, the wire is located between the bent flanges and the battery cell, and an insulating structure is arranged between the support frame, the battery cell and the wire.

[0013] Further, the insulating structure comprises an insulating sleeve, the insulating sleeve is sleeved on the outer periphery of the wire, and an end of the insulating sleeve is provided with an end head, the end head is sleeved at the connection between the wire and the second sampling wire.

[0014] Further, the support frame is further provided with a positioning component, the positioning component is used for fixing the battery cell at a predetermined position of the support frame.

[0015] Further, the positioning component comprises:

[0016] The positioning structure comprises at least two, the at least two positioning structures are respectively fixed to opposite sides of the support frame along the length direction of the main body, the length of each positioning structure extends along the width direction of the support frame, and one side of each positioning structure close to the battery cell abuts against the battery cell.

[0017] Further, the positioning structure comprises:

[0018] A conductive strip, the conductive strip extends along the width direction of the main body, and the conductive strip is electrically connected to the positive tab or the negative tab;

[0019] An insulating positioning block, the insulating positioning block is fixedly connected to the support frame, the conductive strip is fixed to the insulating positioning block, the insulating positioning block is provided with two boss portions, the two boss portions are respectively located at two ends of the length direction of the conductive strip and protrude from the conductive strip along the height direction of the main body, and the two boss portions abut against the battery cell.

[0020] Further, on the same insulating positioning block, the boss portions are arranged through the support frame along the height direction of the main body, one end of the boss portion is provided with a groove, the other end is provided with a column body matched with the groove, in the adjacent two boss portions, the column body of the first boss portion is embedded in the groove of the second boss portion.

[0021] In another aspect, the application also provides a battery pack comprising the battery module.

[0022] In the application, by arranging the conductive piece on the battery cell assembly, the conductive piece is electrically connected with the second sampling line, the conductive piece can lead the second sampling line from the inside of the main body to the other side of the length direction of the main body, so that the connection end of the first sampling line and the connection end of the second sampling line of the battery management system are located on the same side of the length direction of the main body, and the worker only needs to perform the line connection operation between the battery module and the battery management system on one side of the main body, so that the wiring operation is more convenient. In addition, the first sampling line and the second sampling line in the application are more regular and orderly, which is more convenient for the worker to quickly connect the first sampling line and the second sampling line to the battery management system, and the connection efficiency of the first sampling line and the second sampling line between the battery module and the battery management system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0024] Figure 1 Structure schematic diagram of the battery module disclosed in the application (one);

[0025] Figure 2 Structure schematic diagram of the battery module disclosed in the application (two);

[0026] Figure 3 is Figure 1 Enlarged view of the middle P;

[0027] Figure 4 Structure schematic diagram of the battery cell assembly;

[0028] Figure 5 Disassembly view of the battery cell assembly;

[0029] Figure 6 is Figure 5 Enlarged view of the middle Q;

[0030] Figure 7 Structure schematic diagram of the support frame.

[0031] Wherein, the above-mentioned drawings include the following reference signs:

[0032] 10, main body; 11, cell assembly; 111, support frame; 112, bent flange; 12, cell; 121, positive tab; 122, negative tab; 13, first busbar; 131, first sampling line; 1311, first sampling piece; 14, second busbar; 141, second sampling line; 1411, second sampling piece; 15, conductive member; 151, wire; 1511, first end; 1512, second end; 16, positioning component; 17, positioning structure; 171, conductive strip; 172, insulating positioning block; 1721, boss part; 1722, groove; 1723, column; 181, top cover plate; 182, bottom cover plate; 183, insulating plate; 19, foam strip. DETAILED DESCRIPTION

[0033] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0034] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] The relative arrangement of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. Techniques, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but under appropriate circumstances, the techniques, methods and devices should be considered as part of the authorized specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0036] As Figures 1 to 7 shown, the present application provides a battery module. The battery module includes a main body 10. The main body 10 includes a plurality of cell assemblies 11. The plurality of cell assemblies 11 are arranged along the height direction of the main body 10 (such as the direction of the arrow A in the drawing). Figure 1The plurality of electric core assemblies 11 are sequentially arranged in the direction indicated by the arrow Z. Each electric core assembly 11 is provided with an electric core 12. The positive electrode tab 121 and the negative electrode tab 122 of each electric core 12 are arranged at opposite ends of the electric core 12 along the length direction of the main body 10 (indicated by the arrow X). Figure 1 The positive electrode tab 121 of one of the two adjacent electric cores 12 is arranged at the same side of the main body 10 as the negative electrode tab 122 of the other electric core 12.

[0037] The three adjacent electric cores 12 are sequentially arranged as a first electric core, a second electric core and a third electric core along the height direction of the main body 10. The positive electrode tab 121 of the first electric core is electrically connected to the negative electrode tab 122 of the second electric core through a first bus bar 13, and the positive electrode tab 121 of the second electric core is electrically connected to the negative electrode tab 122 of the third electric core through a second bus bar 14. Each first bus bar 13 is arranged at the same side of the main body 10, and each second bus bar 14 is arranged at the same side of the main body 10. Each first bus bar 13 is connected with a first sampling line 131, and each second bus bar 14 is connected with a second sampling line 141.

[0038] Among the two electric cores 12 connected with the second bus bar 14, at least one electric core 12 is arranged on an electric core assembly 11 provided with a conductive member 15. The conductive member 15 extends along the length direction of the main body 10, and the conductive member 15 is electrically connected with the second sampling line 141.

[0039] In the present application, by arranging the conductive member 15 on the electric core assembly 11 and electrically connecting the conductive member 15 with the second sampling line 141, the second sampling line 141 can be led from the inside of the main body 10 to the other side of the main body 10 along the length direction of the main body 10. The connection end of the first sampling line 131 and the connection end of the second sampling line 141 of the battery management system are arranged at the same side of the main body 10 along the length direction of the main body 10, so that the worker only needs to perform the line connection operation between the battery module and the battery management system on one side of the main body 10, and the wiring operation is more convenient. The wiring of the first sampling line 131 and the second sampling line 141 in the present application is more regular and orderly, which is more convenient for the worker to quickly connect the first sampling line 131 and the second sampling line 141 to the battery management system, and improves the connection efficiency of the first sampling line 131 and the second sampling line 141 between the battery module and the battery management system.

[0040] The end of the first sampling line 131 away from the first busbar 13 and the end of the conductive piece 15 away from the second sampling line 141 are respectively connected to a battery management system, and the voltage of each battery cell 12 can be obtained through the battery management system. The battery management system can comprehensively and accurately grasp the voltage condition of each battery cell 12 and real-time monitor the operation condition of each battery cell 12, thereby providing a reliable data basis for subsequent charging and discharging control, battery cell 12 health state evaluation and other operations based on voltage data. The battery management system also helps to timely find the battery cell 12 that may have voltage abnormalities, thereby ensuring the safe and stable operation of the entire battery module.

[0041] In addition, along the height direction of the main body 10, the battery cells 12 are sequentially connected in series, and the positive electrode tab 121 of one of the battery cells 12 at the top end or the bottom end of the main body 10 is connected to a positive electrode output end, and the negative electrode tab 122 of the other is connected to a negative electrode output end. The plurality of battery cell assemblies 11 are sequentially stacked to improve the compactness and aesthetics of the battery module.

[0042] The first sampling sheet 1311 is fixed to the first busbar 13 and electrically connected to the first busbar 13. The first sampling sheet 1311 is provided with three connection ports, and the end of the first sampling line 131 close to the first sampling sheet 1311 forks into three signal lines, which are connected to the three connection ports one by one. The second sampling sheet 1411 is fixed to the second busbar 14 and electrically connected to the second busbar 14. The second sampling sheet 1411 is provided with three connection ports, and the end of the second sampling line 141 close to the second sampling sheet 1411 forks into three signal lines, which are connected to the three connection ports one by one.

[0043] As shown in Figures 3 to 5 Further, the conductive piece 15 includes a wire 151. The wire 151 is fixed to the battery cell assembly 11. The wire 151 includes a first end 1511 and a second end 1512. The first end 1511 is electrically connected to the end of the second sampling line 141 away from the second busbar 14, and the second end 1512 extends to the outside of the battery cell assembly 11 along the length direction of the main body 10. The wire 151 is fixed to the battery cell assembly 11, which can ensure the stability of the wire 151. The wire 151 can reliably transmit the voltage information of the second busbar 14 to the battery management system, so that the battery management system can more accurately obtain the voltage data of each battery cell 12.

[0044] As shown in Figures 4 to 7 Further, the battery cell assembly 11 further includes a support frame 111. Along the width direction of the main body 10 (as shown in Figure 1The opposite sides of the support frame 111 have bent flanges 112 extending along the length of the wire 151, and the wire 151 is fixed to the bent flanges 112. The bent flanges 112 provide a mounting position for the wire 151, and the wire 151 can be laid on the bent flanges 112 to arrange the wire 151 inside the main body 10, ensuring that the wire 151 is arranged in an orderly manner. In addition, the bent flanges 112 can effectively prevent the wire 151 from being broken by external forces and the like, ensuring that the wire 151 can reliably transmit the voltage information of the second bus bar 14 to the battery management system. The bent flanges 112 can also prevent other objects from accidentally contacting the wire 151, effectively preventing the wire 151 from being scratched, squeezed, or short-circuited, and the like, which is beneficial to prolong the service life of the wire 151 and ensure that the battery management system can more accurately receive the voltage data of the battery cell 12. The bent flanges 112 provide a clear position for the installation of the wire 151, and the staff can more quickly and accurately install the wire 151 when assembling the battery module. The bent flanges 112 can be bent upward.

[0045] Further, the battery cell 12 is mounted on the support frame 111. The opposite sides of the battery cell 12 in the width direction of the main body 10 abut against the bent flanges 112, the wire 151 is located between the bent flanges 112 and the battery cell 12, and an insulating structure is provided between the support frame 111 and the battery cell 12 and the wire 151. The opposite sides of the battery cell 12 in the width direction of the main body 10 abut against the bent flanges 112, and the bent flanges 112 can limit the battery cell 12 between the opposite bent flanges 112 of the support frame 111, ensuring that the battery cell 12 does not displace significantly in the width direction of the main body 10, further ensuring the stability of the battery cell 12. In addition, the wire 151 is clamped between the battery cell 12 and the bent flanges 112, further enhancing the stability of the wire 151 and ensuring that the wire 151 does not displace under the action of external forces. The wire 151 is fixed to the bent flanges 112, which also effectively utilizes the space between the bent flanges 112 and the battery cell 12, and the wire 151 can be directly installed on the existing support frame 111 without the need to provide additional space for the wire 151, making the structure of the battery module more compact. The insulating structure can prevent electrical short circuit between the battery cell 12 and the support frame 111 and the wire 151, effectively preventing the wire 151 from causing a short circuit fault, ensuring that the battery module can operate normally, and enhancing the use safety of the battery module.

[0046] Further, the insulating structure comprises an insulating sleeve. The insulating sleeve is sleeved on the outer periphery of the wire 151, and an end of the insulating sleeve is provided with an end head which is sleeved at the connection between the wire 151 and the second sampling line 141. The insulating sleeve can realize insulated connection between the wire 151 and the bent flange 112, and also realize insulated connection between the wire 151 and the battery cell 12, effectively preventing electrical short circuit and other phenomena between the battery cell 12 and the support frame 111 and the wire 151. The end head is sleeved at the connection between the wire 151 and the second sampling line 141, which can ensure the insulation reliability of the connection between the wire 151 and the second sampling line 141, further enhance the insulation performance of the wire 151, and ensure the electrical safety of the connection between the wire 151 and the second sampling line 141. The length of the insulating sleeve can also be adjusted according to the length of the wire 151 and the length of the support frame 111, improving the application range and use flexibility of the insulating sleeve. Specifically, the second sampling line 141 and the wire 151 can be fixedly connected by welding or other methods.

[0047] Further, the support frame 111 is also provided with a positioning component 16. The positioning component 16 is used to fix the battery cell 12 at a predetermined position of the support frame 111. By providing the positioning component 16 on the support frame 111, the battery cell 12 can be accurately fixed at the predetermined position, ensuring that the battery cell 12 is in the correct position and ensuring that the battery cell 12 can stably perform charging and discharging work. The positioning component 16 can also effectively prevent the battery cell 12 from displacing on the support frame 111, thereby preventing the wire 151 from displacing. The positioning component 16 can also effectively reduce the risk of loosening or breaking of the positive electrode tab 121 or the negative electrode tab 122, improving the reliability and service life of the battery module. The positioning component 16 can also simplify the assembly process of the battery cell 12. By providing the positioning component 16 on the support frame 111 in advance, the operator can quickly place the battery cell 12 at the correct position and quickly fix it, improving the assembly efficiency of the battery module.

[0048] Further, the positioning component 16 comprises a positioning structure 17. The positioning structure 17 comprises at least two positioning structures 17 fixed to opposite sides of the support frame 111 in the length direction of the main body 10, and the length of each positioning structure 17 extends in the width direction of the support frame 111, and each positioning structure 17 is in abutment with the battery cell 12 on one side. In the length direction of the main body 10, the positioning structure 17 limits the battery cell 12, effectively preventing displacement of the battery cell 12 on the support frame 111, ensuring that the battery cell 12 can be stably fixed on the support frame 111. In the assembly process of the battery module, the positioning structure 17 and the bent flange 112 can also provide clear installation guidance. The operator can quickly and accurately place the battery cell 12 on the support frame 111 at the correct position, and determine whether the battery cell 12 is installed in place by whether the positioning component 16 and the bent flange 112 are in abutment with the battery cell 12.

[0049] Further, the positioning structure 17 comprises a conductive strip 171 and an insulating positioning block 172. The conductive strip 171 extends in the width direction of the main body 10, and the conductive strip 171 is electrically connected with the positive tab 121 or the negative tab 122. The insulating positioning block 172 is fixedly connected with the support frame 111, the conductive strip 171 is fixed on the insulating positioning block 172, the insulating positioning block 172 is provided with two boss portions 1721, the two boss portions 1721 are located at both ends of the length direction of the conductive strip 171 and protrude from the conductive strip 171 in the height direction of the main body 10, and the two boss portions 1721 are in abutment with the battery cell 12. The conductive strip 171 extends in the width direction of the main body 10, which can increase the contact area between the conductive strip 171 and the battery cell 12, achieve better limiting effect, and ensure that the battery cell 12 is stably fixed at the predetermined position of the support frame 111. The conductive strip 171 is electrically connected with the positive tab 121 or the negative tab 122, achieving electrical connection between the conductive strip 171 and the positive tab 121 or the negative tab 122. The conductive strip 171 can provide stable support for the positive tab 121 and the negative tab 122, preventing the positive tab 121 and the negative tab 122 from being damaged, and the conductive strip 171 also facilitates the operator to install and operate the first bus bar 13 and the second bus bar 14. The insulating positioning block 172 provides stable support for the conductive strip 171, further improving the stability of the positive tab 121 and the negative tab 122, and ensuring the stability and reliability of the connection between the battery cells 12.

[0050] Further, on the same insulating positioning block 172, along the height direction of the main body 10, the boss part 1721 is provided through the support frame 111, one end of the boss part 1721 is provided with a groove 1722, and the other end is provided with a column 1723 matched with the groove 1722. Among the two adjacent boss parts 1721, the column 1723 of the first boss part 1721 is embedded in the groove 1722 of the second boss part 1721. This connection mode can make the boss parts 1721 more stably spliced together in the height direction of the main body 10, which can effectively prevent the relative displacement between the boss parts 1721, thereby maintaining the stability of the battery module. The matching of the groove 1722 and the column 1723 provides accurate positioning guidance for the assembly of the insulating positioning block 172. During the assembly of the battery module, the operator can easily splice the battery module together according to the shape of the groove 1722 and the column 1723, which reduces the assembly error of the battery module in the height direction, and also improves the assembly efficiency and quality of the battery module.

[0051] Among them, on the same positioning structure 17, along the height direction of the main body 10, the groove 1722 and the column 1723 are communicated with each other. Along the height direction of the main body 10, the boss parts 1721 of the plurality of battery cell assemblies 11 are communicated with each other to form a first channel. When assembling the battery module, a long screw can be installed in the first channel to fix the plurality of battery cell assemblies 11 together.

[0052] Further, along the length direction of the main body 10, the foam strip 19 is installed on the opposite sides of the battery cell 12, and the foam strip 19 extends along the width direction of the main body 10. The foam strip 19 can prevent the welding slag generated during the process of welding the first bus bar 13 and the second bus bar 14 to the conductive strip 171 from splashing.

[0053] Among them, the top end of the main body 10 is provided with a top cover plate 181, and the bottom end of the main body 10 is provided with a bottom cover plate 182. The top cover plate 181 and the bottom cover plate 182 can protect the main body 10 and prevent external objects from damaging the battery cell assembly 11. The insulating plate 183 is arranged between the top cover plate 181 and the battery cell assembly 11 at the top end of the main body 10, and the insulating plate 183 is also arranged between the bottom cover plate 182 and the battery cell assembly 11 at the bottom end of the main body 10.

[0054] On the other hand, the application also provides a battery pack, which comprises the above-mentioned battery module, so that the battery pack comprises all the technical effects of the above-mentioned battery module. Since the technical effects of the battery module have been described in detail in the foregoing, they will not be described here.

[0055] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof (e.g., "vertical ly", "horizontal ly", etc.) can refer to the relative positions of an apparatus or feature as shown in the drawings, and shall not be construed as limiting the present application to any particular spatial orientation. Terms concerning attachments, coupling and the like, such as "connected", "attached", "supported", and the like, can have the ordinary and accustomed meanings as understood by those skilled in the art. For example, "connected" can mean directly connected or indirectly connected through one or more intervening elements or features. Such terminology does not exclude the introduction of intermediate elements or features. Such terminology does not exclude the inclusion of topological equivalents of a recited element or equivalent structural arrangements. Such terminology does not exclude the use of other elements in between recited elements or intervening elements. Such terminology does not exclude that multiple elements can be connected to a single element.

[0056] In addition, it should be pointed out that the use of "first", "second" and the like words to qualify parts, is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0057] The preferred embodiments of the present application are shown and described above, and are not intended to limit the present application. The present application can have various modifications and changes, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A battery module, characterized by, The application relates to a battery pack, which comprises: a main body (10) comprising a plurality of cell assemblies (11) arranged in sequence along the height direction of the main body (10), each cell assembly (11) being provided with a cell (12), the positive and negative electrode tabs (121 and 122) of each cell (12) being arranged at opposite ends of the cell (12) along the length direction of the main body (10), and the positive electrode tab (121) of one of the two adjacent cells (12) and the negative electrode tab (122) of the other cell being arranged on the same side of the main body (10); along the height direction of the main body (10), the three adjacent cells (12) are a first cell, a second cell and a third cell in sequence, the positive electrode tab (121) of the first cell and the negative electrode tab (122) of the second cell are electrically connected through a first bus bar (13), the positive electrode tab (121) of the second cell and the negative electrode tab (122) of the third cell are electrically connected through a second bus bar (14), each first bus bar (13) is arranged on the same side of the main body (10), each second bus bar (14) is arranged on the same side of the main body (10), each first bus bar (13) is provided with a first sampling line (131), and each second bus bar (14) is provided with a second sampling line (141); wherein at least one cell (12) in the two cells (12) connected with the second bus bar (14) is provided with an electrically-conductive member (15) on the cell assembly (11) of the cell (12), the electrically-conductive member (15) extends along the length direction of the main body (10), and the electrically-conductive member (15) is electrically connected with the second sampling line (141).

2. The battery module of claim 1, wherein, The electrically-conductive member (15) comprises: a wire (151) fixed on the cell assembly (11), the wire (151) comprising a first end (1511) and a second end (1512), the first end (1511) being electrically connected with one end of the second sampling line (141) away from the second bus bar (14), and the second end (1512) extending to the outside of the cell assembly (11) along the length direction of the main body (10).

3. The battery module of claim 2, wherein, The cell assembly (11) further comprises: a support frame (111) provided with bent flanges (112) on opposite sides of the support frame (111) along the width direction of the main body (10), the bent flanges (112) extending along the length of the wire (151), and the wire (151) being fixed on the bent flanges (112).

4. The battery module of claim 3, wherein, The support frame (111) is provided with the electric core (12), the electric core (12) is abutted to the bending flanging (112) on opposite sides of the width direction of the main body (10), the wire (151) is located between the bending flanging (112) and the electric core (12), and the support frame (111) and the electric core (12) are provided with an insulation structure.

5. The battery module of claim 4, wherein, The insulation structure comprises an insulation sleeve, the insulation sleeve is sleeved on the outer periphery of the wire (151), and the end of the insulation sleeve is provided with a head, the head is sleeved at the connection between the wire (151) and the second sampling line (141).

6. The battery module of claim 3, wherein, The support frame (111) is further provided with a positioning component (16), the positioning component (16) is used for fixing the electric core (12) at a predetermined position of the support frame (111).

7. The battery module of claim 6, wherein, The positioning component (16) comprises: The positioning structure (17) comprises at least two, the at least two positioning structures (17) are respectively fixed on opposite sides of the support frame (111) along the length direction of the main body (10), the length of each positioning structure (17) extends along the width direction of the support frame (111), and one side of each positioning structure (17) close to the electric core (12) is abutted to the electric core (12).

8. The battery module of claim 7, wherein, The positioning structure (17) comprises: The conductive strip (171) extends along the width direction of the main body (10), and the conductive strip (171) is electrically connected with the positive electrode tab (121) or the negative electrode tab (122); The insulation positioning block (172) is fixedly connected with the support frame (111), the conductive strip (171) is fixed on the insulation positioning block (172), the insulation positioning block (172) is provided with two boss portions (1721), the two boss portions (1721) are located at two ends of the length direction of the conductive strip (171) and protrude from the conductive strip (171) along the height direction of the main body (10), and the two boss portions (1721) are abutted to the electric core (12).

9. The battery module of claim 8, wherein, On the same insulation positioning block (172), the boss portion (1721) is provided through the support frame (111) along the height direction of the main body (10), one end of the boss portion (1721) is provided with a groove (1722), the other end is provided with a column (1723) matched with the groove (1722), and in the adjacent two boss portions (1721), the column (1723) of the first boss portion (1721) is embedded in the groove (1722) of the second boss portion (1721).

10. A battery pack, characterized by, The battery pack comprises the battery module of any one of claims 1 to 9.

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