Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack. The battery module comprises a battery cell assembly, a protection circuit board and a conductive connecting piece, wherein the battery cell assembly comprises at least one battery cell; the protection circuit board is arranged at the top of the battery cell and extends along the length direction of the battery module; the conductive connecting sheet is arranged at the top of the battery cell and is connected between the battery cell and the protection circuit board; and the conductive connecting sheet is provided with a conductive part which is clamped by the conductive clamp to charge the battery cell. According to the battery module, the problem that the energy loss of the battery cell is increased due to relatively low charging efficiency of the battery module in the prior art can be solved.

Description

Technical Field

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

[0002] Energy storage devices are now finding increasingly widespread application. As a key component, battery packs consist of multiple battery modules, which in turn contain multiple cells. The consistency of the electrical performance of battery modules varies due to differences in cell composition and storage duration. For battery modules with poor performance consistency, it is necessary to balance the performance of individual cells to ensure consistent performance across the module's multiple cells.

[0003] Currently, equalizing electrical performance is achieved by plugging a wiring harness into signal terminals connected to a protective circuit board, which then charges each battery cell. However, this existing equalizing voltage method has low charging efficiency, which can lead to increased energy loss in the battery cells, shortening their service life. Utility Model Content

[0004] The main purpose of the present application is to provide a battery module and a battery pack to solve the problem in the prior art that the charging efficiency of the battery module is low, resulting in increased energy loss of the battery cell.

[0005] According to one aspect of the present application, a battery module is provided, comprising:

[0006] A battery cell assembly, the battery cell assembly comprising at least one battery cell;

[0007] A protection circuit board is provided on the top of the battery cell and extends along the length direction of the battery module;

[0008] A conductive connecting piece is arranged on the top of the battery cell and connected between the battery cell and the protection circuit board, and the conductive connecting piece has a conductive portion for being clamped by a conductive clip to charge the battery cell.

[0009] Furthermore, an insertion opening is provided on the conductive connecting piece, and the area of the conductive connecting piece between the insertion opening and the outer edge of the conductive connecting piece forms the conductive portion.

[0010] Furthermore, the battery module includes an insulating plate, the insulating plate cover is arranged on the top of the battery cell, and the protective circuit board and the conductive connecting piece are arranged on the side of the insulating plate away from the battery cell;

[0011] An escape space is provided between the outer peripheral side of the conductive connecting piece and the insulating plate, and the escape space is arranged close to the conductive portion.

[0012] Furthermore, a recessed portion is provided on a side of the insulating plate facing away from the battery core, the conductive connecting piece is provided in the recessed portion, and an extension portion is provided near an outer edge of the conductive connecting piece, the extension portion forming the avoidance space.

[0013] Furthermore, along the height direction of the battery module, the top surface of the extension portion is lower than the bottom surface of the recessed portion, and the depth h of the extension portion satisfies the relationship: 0.5 mm ≤ h ≤ 1.5 mm.

[0014] Furthermore, the conductive connecting piece is provided with an insertion opening, and the minimum distance width D between the insertion opening and the outer edge of the conductive connecting piece satisfies the relationship: 3mm≤D≤5mm.

[0015] Furthermore, the conductive connecting sheet includes at least one, the conductive connecting sheet is connected to the battery cells in a one-to-one correspondence, and each of the conductive connecting sheets is provided with the conductive portion for the conductive clip to clamp to charge each battery cell.

[0016] Furthermore, the battery module includes at least one conductive member and at least one conductive connecting piece, the conductive member and the conductive connecting piece are provided in a one-to-one correspondence, and the conductive member is connected between the conductive connecting piece and the protection circuit board;

[0017] The protection circuit board has at least one temperature sensor, which is connected to the conductive connecting piece in a one-to-one correspondence, and the temperature sensor is connected between the conductive connecting piece and the protection circuit board.

[0018] Furthermore, the temperature sensor has a signal line and a ground line;

[0019] At least two temperature sensors are arranged between every two adjacent conductive members, and the grounding lines of the temperature sensors located between the two adjacent conductive members are arranged in a collinear manner.

[0020] On the other hand, the present application also provides a battery pack, which includes the above-mentioned battery module.

[0021] Since the conductive connecting sheet in the present application is provided with a conductive portion, when there is a problem with the consistency between the battery cells, such as when the capacity and voltage between the battery cells are different, the conductive portion can be clamped with a conductive clamp, and then the conductive clamp can be energized, so that a single battery cell can be charged to adjust the charge of the battery cell so that the charge between each battery cell is consistent. In this process, since the present application charges the battery cell by clamping the conductive portion of the conductive connecting sheet with a conductive clamp, rather than using the current transmission function of the protection circuit board to charge the battery cell, a larger current (such as 20A or 30A or 50A) can be applied to the conductive clamp to realize the charging process of the battery cell, rather than using a smaller current (less than 5A) transmitted by the protection circuit board to realize the charging process of the battery cell, thereby improving the charging efficiency of the battery module, reducing the energy loss of the battery cell, and extending the service life of the battery cell to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 A schematic structural diagram of a battery module disclosed in an embodiment of the present application;

[0024] Figure 2 This is a schematic structural diagram of an insulating plate with a protective circuit board and a conductive connecting piece disclosed in an embodiment of the present application;

[0025] Figure 3 The attached embodiment disclosed in this application Figure 2 Enlarged view of area A in the middle;

[0026] Figure 4 A top view of an insulating plate with a protective circuit board and a conductive connecting piece disclosed in an embodiment of the present application;

[0027] Figure 5 This is a top view of the insulating plate disclosed in an embodiment of the present application without the protective circuit board and the conductive connecting piece.

[0028] The above drawings include the following reference numerals:

[0029] 10. Battery cell assembly; 11. Battery cell; 20. Protection circuit board; 21. Temperature sensor; 30. Conductive connecting piece; 31. Conductive portion; 32. Insertion port; 40. Insulation plate; 401. Avoidance space; 41. Recessed portion; 42. Extension portion; 50. Conductive member; h. Depth of the extension portion; D. Width of the minimum distance between the insertion port and the outer edge of the conductive connecting piece. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary, not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0033] As mentioned in the background technology, due to the differences in the composition of the battery cells and the storage time of the battery cells, the consistency of the electrical performance of the battery module will be different. For battery modules with poor electrical performance consistency, it is necessary to adjust the electrical performance of the individual battery cells in a balanced manner to ensure the electrical performance consistency of the multiple battery cells in the battery module. However, the charging efficiency of the existing balanced electrical performance operation method is low, which easily leads to increased energy loss of the battery cells, thereby shortening the service life of the battery cells. To this end, the inventors of this application have designed a new type of battery module, which can solve the problem of low charging efficiency of battery modules in the prior art, resulting in increased energy loss of the battery cells. The battery module of this application will be described in detail below with reference to the accompanying drawings.

[0034] It should be noted that the "longitudinal direction of the battery module" in this application refers to the longitudinal direction of the battery module. Figure 1 The direction indicated by the letter X in the figure, “the height direction of the battery module” refers to the height of the attached Figure 1 The direction indicated by the letter Y.

[0035] See also Figures 1 to 5As shown, according to an embodiment of the present application, a battery module is provided, which includes a battery cell assembly 10, a protection circuit board 20 and a conductive connecting sheet 30.

[0036] Among them, the battery cell assembly 10 includes at least one battery cell 11; the protective circuit board 20 is arranged on the top of the battery cell 11 and extends along the length direction of the battery module; the conductive connecting piece 30 is arranged on the top of the battery cell 11 and connected between the battery cell 11 and the protective circuit board 20, and the conductive connecting piece 30 has a conductive part 31 for being clamped by a conductive clip (not shown in the drawings) to charge the battery cell 11.

[0037] In this embodiment, when the battery module is actually manufactured, the protective circuit board 20 and the conductive connecting piece 30 can be placed on top of the battery cell 11, and the conductive connecting piece 30 can be used to connect the protective circuit board 20 and the battery cell 11, so that the protective circuit board 20 can protect the battery cell 11 from charging and discharging. At the same time, because the conductive connecting piece 30 in this embodiment is provided with a conductive portion 31, when there is a problem with the consistency between the various battery cells 11, such as the difference in capacity and voltage between the battery cells 11, the conductive portion 31 can be clamped with a conductive clamp, and then the conductive clamp can be energized, so that a single battery cell 11 can be charged to adjust the charge of the battery cell 11 so that the charge of each battery cell 11 is consistent. During this process, since the present embodiment charges the battery cell 11 by clamping the conductive portion 31 of the conductive connecting sheet 30 with a conductive clip, rather than utilizing the current transmission function of the protection circuit board 20 to charge the battery cell 11, a larger current (for example, a current of 20A or 30A or 50A) can be applied to the conductive clip to realize the charging process of the battery cell 11, rather than realizing the charging process of the battery cell 11 by using a smaller current (less than 5A) transmitted by the protection circuit board 20, thereby improving the charging efficiency of the battery module, reducing the energy loss of the battery cell 11, and extending the service life of the battery cell 11 to a certain extent.

[0038] Optionally, the “battery cell 11” in this embodiment can be set to one, or two or more. Figure 1 FIG. 4 shows a case where the number of battery cells 11 is thirteen; the “conductive connecting piece 30 ” in this embodiment includes an aluminum sheet or a copper sheet; and the “conductive clip” in this embodiment includes an alligator clip.

[0039] Furthermore, in order to facilitate the conductive clip to clamp the conductive portion 31 and to improve the connection strength between the conductive clip and the conductive connecting piece 30, see Figure 3 As shown, the conductive connecting piece 30 in this embodiment is provided with an insertion opening 32 , and the conductive connecting piece 30 is located between the insertion opening 32 and the outer edge of the conductive connecting piece 30 to form a conductive portion 31 .

[0040] Specifically, because the conductive connecting piece 30 in this embodiment is provided with an insertion port 32, when consistency issues arise between the individual battery cells 11, the conductive clamp can be opened so that one clamping section of the conductive clamp extends into the insertion port 32, while the other clamping section of the conductive clamp is located at the outer edge of the conductive connecting piece 30. In this way, the conductive clamp can clamp the conductive portion 31, thereby better conducting current to charge the battery cell 11 and ultimately achieving regulation of the charge of the battery cell 11. In other words, the provision of the insertion port 32 in this embodiment facilitates the conductive clamp to clamp the conductive portion 31; and the provision of the conductive portion 31 can improve the connection strength between the conductive clamp and the conductive connecting piece 30, while also improving the current conduction efficiency.

[0041] Further, see Figures 2 to 4 As shown, the battery module in this embodiment includes an insulating plate 40, which is covered on the top of the battery cell 11. A protective circuit board 20 and a conductive connecting piece 30 are provided on the side of the insulating plate 40 facing away from the battery cell 11; an avoidance space 401 is provided between the outer peripheral side of the conductive connecting piece 30 and the insulating plate 40, and the avoidance space 401 is provided close to the conductive part 31.

[0042] Specifically, since the conductive connecting piece 30 in this embodiment is arranged on the insulating plate 40, if the conductive connecting piece 30 and the insulating plate 40 are tightly fitted and there is no gap for the conductive clamp to clamp, it will make it difficult to adjust the electrical performance of a single battery cell 11. To this end, in this embodiment, an escape space 401 is provided between the outer peripheral side of the conductive connecting piece 30 and the insulating plate 40, and the escape space 401 is provided close to the conductive portion 31. In this way, the existence of the escape space 401 can avoid the conductive clamp, thereby providing a clamping space for the conductive clamp, making it easier for the conductive clamp to clamp the conductive portion 31. At the same time, the provision of the insulating plate 40 in this embodiment can prevent the battery module from short-circuiting. It is understandable that the insulating plate 40 can be made of plastic material to achieve an insulating effect.

[0043] Specifically, the insulating plate 40 in this embodiment is processed by vacuum forming, which can reduce the weight of the insulating plate 40, thereby reducing the overall weight of the battery module and facilitating miniaturization design. At the same time, since the mold cost of vacuum forming is low, the production cost of the battery module can be reduced.

[0044] Further, see Figures 3 to 5As shown, the insulating plate 40 in this embodiment is provided with a recessed portion 41 on the side facing away from the battery cell 11, and the conductive connecting piece 30 is provided in the recessed portion 41. The recessed portion 41 is provided with an extension portion 42 near the outer edge of the conductive connecting piece 30, and the extension portion 42 forms an avoidance space 401. Specifically, the provision of the recessed portion 41 provides installation space for the conductive connecting piece 30, facilitating the installation and fixation of the conductive connecting piece 30, thereby preventing the conductive connecting piece 30 from shifting due to vibration and impact during the transportation and use of the battery module, and effectively ensuring the stability of the internal structure of the battery module. At the same time, the provision of the extension portion 42 in this embodiment can provide a clamping space for the conductive clip, facilitating the conductive clip to clamp the conductive portion 31.

[0045] Furthermore, along the height direction of the battery module, the top surface of the extension portion 42 in this embodiment is lower than the bottom surface of the recessed portion 41, and the depth h of the extension portion 42 satisfies the relationship: 0.5mm≤h≤1.5mm, for example, h can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc. When h is less than 0.5 mm, the depth of the extension portion 42 is too shallow, causing the bottom surface of the extension portion 42 to be substantially flush with the bottom surface of the recessed portion 41. This in turn causes the extension portion 42 to be unable to provide sufficient clearance space 401 for the conductive clip to clamp the conductive portion 31, increasing the difficulty of the conductive clip clamping the conductive portion 31. When h is greater than 1.5 mm, the depth of the extension portion 42 is too deep, thereby reducing the structural strength of the insulating plate 40 and causing the insulating plate 40 to deform or be damaged when the battery module is subjected to external force. In other words, in this embodiment, by ensuring that the depth h of the extension portion 42 satisfies the relationship: 0.5 mm ≤ h ≤ 1.5 mm, not only is sufficient clearance space 401 provided for the conductive clip to facilitate the conductive clip clamping the conductive portion 31, but the structural strength of the insulating plate 40 is also enhanced to a certain extent, preventing the insulating plate 40 from being damaged.

[0046] Further, see Figure 3As shown, the conductive connecting piece 30 in this embodiment is provided with an insertion opening 32. The minimum spacing width D between the insertion opening 32 and the outer edge of the conductive connecting piece 30 satisfies the relationship: 3mm≤D≤5mm. For example, D can be 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5mm, etc. When D is less than 3mm, the spacing between the insertion opening 32 and the outer edge of the conductive connecting piece 30 is too narrow, thereby shortening the width of the conductive portion 31 and reducing the structural strength of the conductive portion 31. In this case, when the conductive clip clamps the conductive portion 31, the conductive portion 31 may be damaged due to its weak structural strength. When D is greater than 5mm, the spacing between the insertion opening 32 and the outer edge of the conductive connecting piece 30 is too wide, thereby increasing the width of the conductive portion 31, making it difficult to ensure that the conductive clip can be stably clamped on the conductive portion 31, and reducing the connection strength between the conductive clip and the conductive portion 31. That is to say, in this embodiment, by making the minimum spacing width D between the insertion port 32 and the outer edge of the conductive connecting piece 30 satisfy the relationship: 3mm≤D≤5mm, not only the structural strength of the conductive part 31 can be improved, but also the stability of the connection between the conductive clip and the conductive part 31 can be improved.

[0047] Further, see Figure 2 as well as Figure 4 As shown, the conductive connecting sheet 30 in this embodiment includes at least one piece, and the conductive connecting sheet 30 is connected to the battery cell 11 in a one-to-one correspondence, and each conductive connecting sheet 30 is provided with a conductive portion 31 for clamping with a conductive clip to charge each battery cell 11. Specifically, in this embodiment, by connecting the conductive connecting sheet 30 to the battery cell 11 in a one-to-one correspondence, each battery cell 11 can be charged separately to adjust the charge of each battery cell 11 so that the charge between each battery cell 11 is consistent. In other words, when there is a problem with the consistency between each battery cell 11, the conductive clip can be used to charge each battery cell 11 individually, rather than charging the battery cell assembly 10 as a whole, which is convenient and quick to operate.

[0048] Optionally, the “conductive connecting sheet 30” in this embodiment can be provided as one piece, or as two or more pieces. Figure 4 FIG. 2 shows a case where fourteen conductive connecting sheets 30 are provided.

[0049] Further, see Figure 2 as well as Figure 4As shown, the battery module in this embodiment includes at least one conductive member 50 and at least one conductive connecting piece 30, the conductive member 50 is arranged in a one-to-one correspondence with the conductive connecting piece 30, and the conductive member 50 is connected between the conductive connecting piece 30 and the protection circuit board 20; the protection circuit board 20 has at least one temperature sensor 21, the temperature sensor 21 is connected in a one-to-one correspondence with the conductive connecting piece 30, and the temperature sensor 21 is connected between the conductive connecting piece 30 and the protection circuit board 20.

[0050] Specifically, the temperature sensor 21 in this embodiment is used to collect the temperature of the battery cell 11. By connecting the temperature sensor 21 to the conductive connecting piece 30 in a one-to-one correspondence, this embodiment can monitor the temperature of each battery cell 11 in real time to prevent the battery cell assembly 10 from being damaged due to excessive temperature. The protection circuit board 20 can control the charging and discharging of the battery cell assembly 10 based on the data collected by the temperature sensor 21, thereby preventing the battery cell assembly 10 from being overcharged or over-discharged, thereby extending the service life of the battery cell assembly 10. At the same time, the conductive member 50 is connected between the conductive connecting piece 30 and the protection circuit board 20 to ensure the reliability of the connection and reduce failures caused by poor connection. For example, the "conductive member 50" in this embodiment includes a nickel sheet.

[0051] Optionally, the "conductive member 50" in this embodiment can be set to one, or two or more, and the "temperature sensor 21" can be set to one, or two or more. The number of the conductive member 50 and the temperature sensor 21 can be designed according to the number of the battery cells 11. Figure 4 FIG. 2 shows a case where the number of the conductive members 50 and the temperature sensors 21 is fourteen.

[0052] Furthermore, the temperature sensor 21 in this embodiment has a signal line (not shown in the drawings) and a ground line (not shown in the drawings); see Figure 4 As shown, in the embodiment shown in the present application, at least two temperature sensors 21 are disposed between every two adjacent conductive members 50 , and the grounding lines of the temperature sensors 21 located between the two adjacent conductive members 50 are collinearly disposed.

[0053] For example, in this embodiment, “at least two temperature sensors 21 are provided between every two adjacent conductive members 50” means that there can be two, three or more temperature sensors 21 between every two adjacent conductive members 50. Figure 4 FIG. 5 shows a situation where two temperature sensors 21 are provided between two adjacent conductive members 50 .

[0054] Specifically, because the conductive member 50 itself has a power line, when the conductive member 50 and the temperature sensor 21 are arranged alternately (i.e., there is a conductive member 50 between every two adjacent temperature sensors 21), the power line of the conductive member 50 will block the ground line of the temperature sensor 21, so that the ground line needs to bypass the power line of the conductive member 50 before connecting to the signal connector of the battery module, and the ground lines of each temperature sensor 21 cannot be collinear, thereby increasing the number of wiring harnesses on the protection circuit board 20 and increasing manufacturing costs. To this end, this embodiment provides at least two temperature sensors 21 between every two adjacent conductive members 50. In this way, the ground lines of the temperature sensors 21 located between two adjacent conductive members 50 can be connected together without bypassing the power line of the conductive member 50, thereby reducing the number of wiring harnesses on the protection circuit board 20 and reducing manufacturing costs.

[0055] In combination with the above-mentioned embodiments, it can be known that the present application provides a conductive portion 31 on the conductive connecting sheet 30. When there is a problem with the consistency between the various battery cells 11, the conductive portion 31 can be clamped by a conductive clip to charge the battery cell 11, thereby adjusting the charge of the battery cell 11 so that the charge between the various battery cells 11 is consistent. At the same time, the present application can apply a larger current to the conductive clip to realize the charging process of the battery cell 11, rather than realizing the charging process of the battery cell 11 by a smaller current delivered by the protective circuit board 20, thereby improving the charging efficiency of the battery module, reducing the energy loss of the battery cell 11, and extending the service life of the battery cell 11 to a certain extent.

[0056] On the other hand, the present application also provides a battery pack, which includes the above-mentioned battery module. Therefore, the battery pack includes all the technical effects of the above-mentioned battery module. Since the technical effects of the battery module have been described in detail above, they will not be repeated here.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0059] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell assembly (10), the battery cell assembly (10) comprising at least one battery cell (11); A protective circuit board (20), the protective circuit board (20) being arranged on the top of the battery cell (11) and extending along the length direction of the battery module; A conductive connecting piece (30) is provided on the top of the battery cell (11) and connected between the battery cell (11) and the protective circuit board (20), and the conductive connecting piece (30) has a conductive portion (31) for being clamped by a conductive clip to charge the battery cell (11).

2. The battery module according to claim 1, wherein: The conductive connecting piece (30) is provided with an insertion opening (32), and the conductive portion (31) is formed in an area of the conductive connecting piece (30) between the insertion opening (32) and the outer edge of the conductive connecting piece (30).

3. The battery module according to claim 1, wherein: The battery module comprises an insulating plate (40), the insulating plate (40) being arranged on the top of the battery cell (11), and the protective circuit board (20) and the conductive connecting sheet (30) being arranged on a side of the insulating plate (40) facing away from the battery cell (11); An escape space (401) is provided between the outer peripheral side of the conductive connecting piece (30) and the insulating plate (40), and the escape space (401) is arranged close to the conductive portion (31).

4. The battery module according to claim 3, characterized in that: A recessed portion (41) is provided on a side of the insulating plate (40) facing away from the battery core (11), the conductive connecting piece (30) is provided in the recessed portion (41), and an extended portion (42) is provided near the outer edge of the conductive connecting piece (30) of the recessed portion (41), and the extended portion (42) forms the avoidance space (401).

5. The battery module according to claim 4, characterized in that: Along the height direction of the battery module, the top surface of the extension portion (42) is lower than the bottom surface of the recessed portion (41), and the depth h of the extension portion (42) satisfies the relationship: 0.5 mm ≤ h ≤ 1.5 mm.

6. The battery module according to claim 1, characterized in that: The conductive connecting piece (30) is provided with an insertion opening (32), and the minimum spacing width D between the insertion opening (32) and the outer edge of the conductive connecting piece (30) satisfies the relationship: 3mm≤D≤5mm.

7. The battery module according to any one of claims 1 to 6, characterized in that: The conductive connecting piece (30) comprises at least one piece, the conductive connecting piece (30) is connected to the battery cells (11) in a one-to-one correspondence, and each conductive connecting piece (30) is provided with the conductive portion (31) for being clamped by the conductive clip to charge each battery cell (11).

8. The battery module according to any one of claims 1 to 6, characterized in that: The battery module comprises at least one conductive member (50) and at least one conductive connecting piece (30), wherein the conductive member (50) and the conductive connecting piece (30) are arranged in a one-to-one correspondence, and the conductive member (50) is connected between the conductive connecting piece (30) and the protective circuit board (20); The protective circuit board (20) has at least one temperature sensor (21), the temperature sensor (21) is connected to the conductive connecting piece (30) in a one-to-one correspondence, and the temperature sensor (21) is connected between the conductive connecting piece (30) and the protective circuit board (20).

9. The battery module according to claim 8, characterized in that: The temperature sensor (21) has a signal line and a ground line; At least two temperature sensors (21) are arranged between every two adjacent conductive members (50), and the grounding lines of the temperature sensors (21) located between the two adjacent conductive members (50) are arranged in a collinear manner.

10. A battery pack, characterized in that: The battery pack includes the battery module according to any one of claims 1 to 9.

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