Battery modules and energy storage devices

Abstract

This application discloses a battery module and energy storage device. The battery module includes a bracket, a battery cell, an insulator, and an aluminum busbar. The battery cell is configured to be mounted on the bracket in a predetermined position. The insulator covers one end of the battery cell and avoids the electrical connection terminal of the battery cell. The aluminum busbar and the battery cell are electrically connected at their electrical connection terminals, and the aluminum busbar has at least one observation hole. When the battery cell is in the predetermined position, the observation hole is positioned away from the insulator. When the battery cell is not in the predetermined position, at least one observation hole is positioned opposite the insulator. The battery module is mounted between the aluminum busbar and the battery cell via the insulator, which helps to identify whether the battery cell is mounted on the bracket in the predetermined position. If part or all of the insulator can be seen through the observation hole, it can be determined that the battery cell is not mounted on the bracket in the predetermined position, and the mounting position of the battery cell on the bracket needs to be adjusted to the predetermined position to ensure accurate connection between the electrical connection terminals of the aluminum busbar and the battery cell.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module and energy storage device. Background Technology

[0002] In battery assembly, if the battery cell is installed in the wrong position on the bracket, the non-electrode part of the battery cell will be welded to the aluminum busbar, resulting in changes in the electrical connection area between the battery cell and the aluminum busbar, or no electrical connection at all, thus causing the electrical connection between the battery cell and the aluminum busbar to fail. Utility Model Content

[0003] In view of this, it is necessary to provide a battery module that improves the effectiveness of electrical connection between aluminum busbars and battery cells.

[0004] Some embodiments of this application provide a battery module, which includes a bracket, a battery cell, an insulator, and an aluminum busbar. The battery cell is configured to be mounted on the bracket in a predetermined position. The insulator covers one end of the battery cell and avoids the electrical connection terminal of the battery cell. The aluminum busbar and the electrical connection terminal of the battery cell are electrically connected, and the aluminum busbar has an observation hole. When the battery cell is in the predetermined position, the observation hole is positioned away from the insulator. When the battery cell is not in the predetermined position, the observation hole is positioned opposite the insulator.

[0005] The aforementioned battery module is installed between the aluminum busbar and the battery cell via an insulating component, which helps identify whether the battery cell is assembled in the designated position on the bracket. If part or all of the insulating component can be seen through the inspection hole, it can be determined that the battery cell is not installed in the designated position on the bracket, and the installation position of the battery cell on the bracket needs to be adjusted to the designated position to ensure accurate electrical connection between the aluminum busbar and the battery cell.

[0006] According to some embodiments of this application, the observation hole includes a plurality of sub-holes, each sub-hole corresponding to an electrical connection terminal. When the battery cell is in a set position, all the sub-holes are located away from the insulating member. When the battery cell deviates from the set position in at least one of a plurality of directions, at least one of the sub-holes is located opposite the insulating member.

[0007] In the above embodiments, multiple sub-holes are conveniently arranged at the edge of the aluminum busbar without affecting the electrical connection between the aluminum busbar and the battery cell, and can adapt to the detection of the battery cell moving in multiple directions and deviating from the set position.

[0008] According to some embodiments of this application, the battery cell moves in a clockwise or counterclockwise direction along the circumference instead of being in a set position, and observation holes are respectively provided on opposite sides of the aluminum busbar along the circumference of the battery cell.

[0009] In the above embodiments, the battery cell can move in a clockwise or counterclockwise direction and deviate from the set position, which is suitable for a circular battery cell structure. The observation holes on both sides of the aluminum busbar along the circumference realize the detection of the battery cell deviating from the set position when it moves in both directions.

[0010] According to some embodiments of this application, there are multiple battery cells, which are assembled on a bracket. The insulating member has multiple covering areas, each configured to cover a corresponding battery cell and avoid electrical connection terminals. There are multiple aluminum busbars, each with an observation hole corresponding to at least one battery cell. When the battery cell is in a set position, the observation hole is located within the covering area. When the battery cell is not in the set position, the observation hole is located within the covering area.

[0011] In the above embodiments, the insulating component is provided with multiple covering areas, which facilitates the simultaneous assembly of multiple covering areas onto multiple battery cells, thereby improving assembly efficiency.

[0012] According to some embodiments of this application, the covered area is adhered to the end face of the battery cell where an electrical connection terminal is provided.

[0013] In the above embodiments, the covering area is bonded to the end face of the battery cell, which helps to improve the positional stability of the covering area and the battery cell, thereby improving the accuracy of determining whether the battery cell is in the set position through the observation hole and the covering area.

[0014] According to some embodiments of this application, the insulating member further includes a plurality of tear zones, each tear zone being disposed around the outer periphery of a corresponding covering zone, the tear zones being configured to tear under force, such that every two adjacent covering zones are spaced apart.

[0015] In the above embodiments, each pair of adjacent shielding areas is spaced apart, so that the cells corresponding to the shielding areas are independent of each other, reducing the influence between cells.

[0016] According to some embodiments of this application, the tear zone includes a plurality of connecting zones and a plurality of discontinuous zones arranged along the circumference, with a connecting zone arranged between every two adjacent discontinuous zones, the connecting zone connecting the covering zone, and the connecting zone being configured to tear under force.

[0017] In the above embodiments, the tear zone is formed by intermittent and connecting zones arranged at intervals, which is simple in structure and easy to manufacture, and the connecting zone is easy to tear.

[0018] According to some embodiments of this application, the insulating element further includes a separation region, with each tear region connecting the separation region and a corresponding covering region. The bracket is provided with multiple slots, each battery cell is installed in a slot, and the sidewall of the slot is configured to abut against the separation region, causing the tear region to tear and move to fit against the outer peripheral wall of the battery cell.

[0019] In the above embodiments, when the multiple covering areas are not separated from the separation area, it is easy to ensure the integrity of the multiple battery cells so that the multiple battery cells can be installed as a whole on the bracket. During the installation process, the side wall of the slot presses against the insulating part near or directly opposite the tear area, causing the tear area to tear. The side wall of the slot continues to move between the outer peripheral walls of the adjacent battery cells to abut against and drive the separation area to adhere to the outer peripheral wall of the battery cell, so that there is an insulating separation area between the battery cell and the side wall of the slot, which improves the insulation performance of the battery cell.

[0020] According to some embodiments of this application, the insulating member further includes a plurality of exposed areas, wherein the projection of each covered area and the exposed area onto the end face of the corresponding cell where the electrical connection terminal is located, and the exposed area is configured to expose the electrical connection terminal when the cell is in a set position.

[0021] In the above embodiments, the projection of the shielding area onto the cell is located within the end face of the cell, reducing the risk of the shielding area protruding from the outer periphery of the cell and interfering with other cells or structures, and facilitating the positioning of the cell and the shielding area.

[0022] According to some embodiments of this application, the aluminum strip is provided with positioning holes, and the bracket is provided with positioning pins, with the positioning holes and positioning pins cooperating.

[0023] In the above embodiments, the positioning hole and the positioning pin cooperate to improve the relative positioning accuracy of the battery cell and the aluminum busbar, which helps to improve the accuracy of judging the battery cell being installed on the bracket based on the observation hole of the aluminum busbar revealing the covered area.

[0024] Some embodiments of this application also provide a battery module, which includes a bracket, multiple battery cells, an insulator, and multiple aluminum busbars. The multiple battery cells are configured to be mounted on the bracket at predetermined positions. The insulator has multiple covered areas and multiple tear areas, each tear area surrounding the outer periphery of a corresponding covered area. The tear areas are configured to tear under force. The covered areas cover one end of the corresponding battery cell and expose the battery cell's electrical connection terminal. Each aluminum busbar is configured to connect at least two battery cells, and the aluminum busbar and the corresponding battery cell's electrical connection terminal are electrically connected. The aluminum busbar has at least one observation hole corresponding to a battery cell. When the battery cell is in the predetermined position, the observation hole is located outside the covered area; when the battery cell is not in the predetermined position, at least one observation hole is located within the covered area.

[0025] In the aforementioned battery module, the cooperation between the shielding area of ​​the insulating component and the observation hole helps to identify whether the battery cell is assembled on the bracket in a set position, thereby improving the connection effectiveness of the electrical connection between the aluminum busbar and the battery cell. The shielding areas are spaced apart to make the battery cells corresponding to the shielding areas independent of each other, reducing the influence between the battery cells.

[0026] Some embodiments of this application also provide an energy storage device, which includes a housing and a battery module disposed within the housing. The battery module includes a support, battery cells, an insulator, and an aluminum busbar. The battery cells are configured to be mounted on the support in a predetermined position. The insulator covers one end of the battery cell and avoids the electrical connection terminal of the battery cell. The aluminum busbar and the electrical connection terminal of the battery cell are electrically connected, and the aluminum busbar has at least one observation hole. When the battery cell is in the predetermined position, the observation hole is positioned away from the insulator. When the battery cell is not in the predetermined position, at least one observation hole is positioned opposite the insulator.

[0027] The aforementioned energy storage device uses an insulating component installed between the aluminum busbar and the battery cell within the battery module. This helps identify whether the battery cell is mounted on the bracket in the designated position. If part or all of the insulating component can be seen through the inspection hole, it can be determined that the battery cell is not mounted on the bracket in the designated position. The battery cell's mounting position on the bracket needs to be adjusted to the designated position to ensure accurate electrical connection between the aluminum busbar and the battery cell, thereby reducing the defect rate of the energy storage device. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an energy storage device according to an embodiment of this application.

[0029] Figure 2 for Figure 1 The diagram shows the exploded structure of the energy storage device.

[0030] Figure 3 This is a schematic diagram of the structure of a battery module according to an embodiment of this application when the aluminum busbar is omitted.

[0031] Figure 4 for Figure 3 The diagram shown is an exploded view of the battery module.

[0032] Figure 5 for Figure 3 The diagram shows the structure of the battery module without the bracket and aluminum busbar.

[0033] Figure 6 for Figure 5 The diagram shows the structure of the insulating component in the battery module.

[0034] Figure 7 for Figure 6 The enlarged view of the insulating component at point A is shown.

[0035] Figure 8 for Figure 5 The diagram shows a partial structural representation of the aluminum busbar, bracket, insulator, and battery cell assembly when the battery cell is not in the designated position in the battery module.

[0036] Explanation of main component symbols 200. Energy storage device; 201. Housing; 100. Battery module; 10. Bracket; 11. Slot; 111. Side wall; 13. Positioning pin; 20. Battery cell; 21. Electrical connection terminal; 211. First electrode; 213. Second electrode; 30. Insulating component; 31. Covered area; 33. Exposed area; 35. Tear area; 351. Connection area; 353. Discontinuity area; 37. Separation area; 40. Aluminum busbar; 41. Observation hole; 411. Sub-hole; 43. Connection part; 45. Positioning hole. Detailed Implementation

[0037] The implementation of this application will now be described with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0039] This application provides a battery module in several embodiments, comprising a support frame, battery cells, an insulator, and an aluminum busbar. The battery cells are configured to be mounted on the support frame in a predetermined position. The insulator covers one end of the battery cell and avoids the electrical connection terminal of the battery cell. The aluminum busbar and the electrical connection terminal of the battery cell are electrically connected, and the aluminum busbar has at least one observation hole. When the battery cell is in the predetermined position, the observation hole is positioned away from the insulator. When the battery cell is not in the predetermined position, at least one observation hole is positioned opposite the insulator.

[0040] The aforementioned battery module is installed between the aluminum busbar and the battery cell via an insulating component, which helps identify whether the battery cell is assembled in the designated position on the bracket. If part or all of the insulating component can be seen through the inspection hole, it can be determined that the battery cell is not installed in the designated position on the bracket, and the installation position of the battery cell on the bracket needs to be adjusted to the designated position to ensure accurate electrical connection between the aluminum busbar and the battery cell.

[0041] The following section, in conjunction with the accompanying drawings, provides a detailed description of some embodiments of this application. Unless otherwise specified, the following embodiments and features described herein can be combined with each other.

[0042] Please see Figure 1 and Figure 2 This application also proposes an energy storage device 200. The energy storage device 200 includes a housing 201 and a battery module 100. The battery module 100 is disposed within the housing 201.

[0043] Please see Figure 3 and Figure 4One embodiment of this application provides a battery module 100. The battery module 100 includes a support 10, a battery cell 20, an insulating component 30, and an aluminum busbar 40, such as... Figure 8 As shown, the battery cell 20 is configured to be mounted on the bracket 10 in a predetermined position to facilitate the connection between the battery cell 20 and the aluminum busbar 40, forming an electrical connection structure. When the battery cell 20 is not mounted on the bracket 10 in the predetermined position, it may cause the contact area of ​​the electrical connection between the battery cell 20 and the aluminum busbar 40 to become smaller or even fail.

[0044] The battery cell 20 is provided with an electrical connection terminal 21. When the battery cell 20 is assembled in the bracket 10 in the set position, the aluminum busbar 40 can correctly connect to the electrical connection terminal 21 of the battery cell 20; when the battery cell 20 is not assembled in the set position on the bracket 10, the electrical connection terminal 21 and the aluminum busbar 40 are misaligned, resulting in a smaller connection area between the electrical connection terminal 21 and the aluminum busbar 40 or no connection, which affects the power supply performance of the battery cell 20 in the battery module 100.

[0045] The electrical connection terminal 21 of the battery cell 20 includes a first electrode 211 and a second electrode 213. The first electrode 211 and the second electrode 213 have opposite polarities. For example, the first electrode 211 is the positive electrode, and the second electrode 213 is the negative electrode. When the battery cell 20 is not in a set position, the relative position of at least one of the first electrode 211 and the second electrode 213 with respect to the aluminum busbar 40 changes. In one embodiment, the battery cell 20 is a cylindrical battery cell 20, and the support 10 is provided with a slot 11. The slot 11 is a circular groove. The first electrode 211 is located at the center of the battery cell 20, and the second electrode 213 is located on the end face of the battery cell 20. Each aluminum busbar 40 connects two battery cells 20. The aluminum busbar 40 connects the first electrode 211 of one battery cell 20 and the second electrode 213 of the other battery cell 20. The first electrode 211 is located at the center of the cell 20. When the cell 20 deflects around the center relative to the set position in the slot 11, it will cause the second electrode 213 to deflect around the center. When the cell 20 deflects around the center, the first electrode 211 is still located at the center. Therefore, when the cell 20 rotates in the slot 11, the connection position between the second electrode 213 and the aluminum busbar 40 changes. The observation hole 41 is set at the aluminum busbar 40 corresponding to the second electrode 213.

[0046] In one embodiment, an aluminum busbar 40 is disposed on the side of the bracket 10 opposite to the insulator 30 and the battery cell 20. The slot 11 at least partially penetrates the side of the bracket 10 opposite to the battery cell 20, so that the bracket 10 exposes the electrical connection terminal 21 of the battery cell 20.

[0047] It is understood that in other embodiments, the battery cell 20 may also be a structure of other shapes, and the slot 11 may be a corresponding groove shape. In another embodiment, the slot 11 of the bracket 10 is omitted, and the battery cell 20 is positioned on the bracket 10 in other ways. For example, the battery cell 20 is positioned on the bracket 10 by means of a structure in which a protrusion or recess on its end face fits into a corresponding protrusion or recess on the bracket 10.

[0048] The first electrode 211 and the second electrode 213 of the battery cell 20 may also be located at a non-central position within the end face. The assembly of the battery cell 20 with the bracket 10 may, due to structural dimensional errors or other reasons, cause a change in the position of the electrical connection end 21 of the battery cell 20 mounted on the bracket 10, resulting in changes in the connection area between the first electrode 211 and / or the second electrode 213 of the electrical connection end 21 and the aluminum busbar 40. Corresponding observation holes 41 are provided for the first electrode 211 and / or the second electrode 213 of the aluminum busbar 40, whose positions may change.

[0049] It is understood that in other embodiments, the aluminum busbar 40 may also connect three, four, or other different numbers of battery cells 20.

[0050] An insulating component 30 is installed between the aluminum busbar 40 and the battery cell 20, which helps to identify whether the battery cell 20 is assembled in the designated position on the bracket 10. The aluminum busbar 40 is provided with an observation hole 41. When the battery cell 20 is in the designated position, the observation hole 41 is positioned away from the insulating component 30; when the battery cell 20 is not in the designated position, the observation hole 41 is aligned with the insulating component 30. That is, as long as part or all of the insulating component 30 can be seen through the observation hole 41, it can be determined that the battery cell 20 is not installed in the designated position on the bracket 10. The installation position of the battery cell 20 on the bracket 10 needs to be adjusted to the designated position so that the electrical connection terminal 21 of the aluminum busbar 40 and the battery cell 20 is accurately connected. The cooperation between the insulating component 30 and the observation hole 41 can help eliminate the problem of incorrect installation of the battery cell 20 on the bracket 10, which is conducive to improving the accuracy of the connection between the aluminum busbar 40 and the battery cell 20, that is, improving the connection effectiveness of the electrical connection terminal 21 of the aluminum busbar 40 and the battery cell 20. Moreover, the structure of the insulating component 30 and the mating hole is simple.

[0051] Whether the battery cell 20 is installed in the bracket 10 in the set position can be determined by using automatic observation equipment, such as a camera, or by manually inspecting the structure exposed through the observation hole 41. This application does not limit how to inspect the observation hole 41.

[0052] In one embodiment, please refer to Figure 4 and Figure 5There are multiple battery cells 20. Each battery cell 20 is configured to be mounted on the bracket 10 at a predetermined position. The insulating member 30 has multiple covering areas 31. Each covering area 31 corresponds one-to-one with a battery cell 20. The covering areas 31 are bonded to the end face of the battery cell 20, which helps improve the positional stability of the covering areas 31 and the battery cell 20, thereby improving the accuracy of determining whether the battery cell 20 is in the predetermined position through the observation hole 41 and the covering areas 31.

[0053] The insulating component 30 is provided with multiple covering areas 31, which facilitates the simultaneous assembly of multiple covering areas 31 onto multiple cells 20, thereby improving assembly efficiency.

[0054] Please see Figure 8 There are multiple aluminum busbars 40. Each aluminum busbar 40 is provided with an observation hole 41 corresponding to at least one battery cell 20. In one embodiment, the observation hole 41 of each aluminum busbar 40 includes two sub-holes 411. The two sub-holes 411 correspond to one battery cell 20.

[0055] It is understood that in other embodiments, the aluminum busbar 40 may also be provided with a sub-hole 411, for example, when the battery cell 20 is configured to move in one direction relative to the bracket 10 and is not in a set position, the single sub-hole 411 is located on the insulating member 30 when the battery cell 20 moves in one direction away from the set position.

[0056] It is understood that in other embodiments, the aluminum busbar 40 may also be provided with multiple observation holes 41 corresponding one-to-one with the multiple battery cells 20.

[0057] When the battery cell 20 is in the set position, both sub-holes 411 are located away from the cover area 31; when the battery cell 20 is not in the set position, at least one of the two sub-holes 411 is located in the cover area 31, and the observation hole 41 located in the cover area 31 exposes at least a portion of the cover area 31. The position of the battery cell 20 mounted on the bracket 10 needs to be adjusted until neither of the two sub-holes 411 is exposed in the cover area 31.

[0058] Please see Figure 8 In one embodiment, two sub-holes 411 are distributed circumferentially along the battery cell 20 on opposite sides of the connection portion 43 connected to the electrodes whose relative positions change. When the battery cell 20 rotates clockwise within the slot 11, one of the two sub-holes 411 exposes the covered area 31; when the battery cell 20 rotates counterclockwise within the slot 11, the other of the two sub-holes 411 exposes the covered area 31. It is understood that the two sub-holes 411 can also be connected, making the observation hole 41 a continuous elongated hole structure.

[0059] It is understood that in other embodiments, the aluminum busbar 40 may also be provided with a sub-hole 411 corresponding to the electrical connection end 21 of a battery cell 20. For example, when the actual position of the battery cell 20 changes relative to the set position and moves in one direction, when the battery cell 20 is not in the set position, a single sub-hole 411 can expose the covering area 31. Alternatively, when the actual position of the battery cell 20 changes relative to the set position and moves in three or more directions, for example, if the end face of the battery cell 20 with the electrical connection end 21 can move in a plane, causing the second electrode 213 to move in a plane, the battery cell 20 can move in multiple directions. The multiple observation holes 41 of the aluminum busbar 40 include multiple sub-holes 411, which can be arranged around the outer periphery of the second electrode 213. The edge of the covering area 31 is arranged around the second electrode 213. When the battery cell 20 is in the set position, the multiple sub-holes 411 avoid the covering area 31; when the battery cell 20 is not in the set position, a portion of the multiple sub-holes 411 exposes the covering area 31. The number and position of the sub-holes 411 of the aluminum busbar 40 are determined based on the actual direction of the change in the position of the battery cell 20, the position of the electrical connection terminal 21 in the battery cell 20, the shape of the electrical connection terminal 21, the strength considerations of the aluminum busbar 40, or for the sake of easy observation. This application does not limit the number and position of the sub-holes 411 of the aluminum busbar 40.

[0060] like Figure 7 As shown, in one embodiment, the insulating member 30 further includes a plurality of exposed areas 33. The projection of each covered area 31 and the exposed area 33 onto the corresponding cell 20 is located within the end face of the cell 20 where the electrical connection terminal 21 is located. The exposed area 33 is configured to expose the electrical connection terminal 21 when the cell 20 is in a set position. The projection of the covered area 31 onto the end face of the cell 20 reduces the risk of the covered area 31 protruding from the outer periphery of the cell 20 and interfering with other cells 20 or structures, thus facilitating the positioning of the cell 20 and the covered area 31.

[0061] The battery cell 20 is equipped with an explosion-proof valve (not shown), and the exposed area 33 is configured to expose the explosion-proof valve when the battery cell 20 is in a set position.

[0062] Please see Figure 6 and Figure 7 In one embodiment, the insulating member 30 further includes a plurality of tear zones 35. Each tear zone 35 is disposed around the outer periphery of a corresponding cover zone 31. The tear zones 35 are configured to tear under force, and each cover zone 31 is isolated from the insulating member 30, thereby spacing every two adjacent cover zones 31, making the cells 20 corresponding to the cover zones 31 independent of each other, reducing the impact between the cells 20, for example, reducing the risk of the eruption of a cell 20 spreading to an adjacent cell 20 through the two connected cover zones 31.

[0063] The tear zone 35 includes multiple connecting zones 351 and multiple discontinuous zones 353 arranged circumferentially. A connecting zone 351 is arranged between every two adjacent discontinuous zones 353. The connecting zones 351 are relatively narrow and easily torn under stress. The connecting zones 351 connect to the covering zone 31 and are configured to tear under stress. The tearing of the connecting zones 351 creates a broken space around the outer periphery of the covering zone 31, thus separating the covering zone 31 from the insulating member 30. The tear zone 35 is formed by the spaced-apart discontinuous zones 353 and connecting zones 351, resulting in a simple and easy-to-manufacture structure, and the connecting zones are easily torn.

[0064] In one embodiment, the insulating member 30 further includes a separation region 37, and each tear region 35 is connected between the separation region 37 and the corresponding covering region 31. The bracket 10 is provided with a plurality of slots 11, and each battery cell 20 is installed in the slot 11. The sidewall 111 of the slot 11 is configured to abut against the separation region 37, causing the tear region 35 to tear and move the separation region 37 to fit the outer peripheral wall of the battery cell 20.

[0065] When the multiple covering areas 31 are not separated from the separation area 37, it is easy to ensure the integrity of the multiple battery cells 20 so that the multiple battery cells 20 can be installed as a whole on the bracket 10. During the installation process, the side wall 111 of the slot 11 presses against the insulating part 30 near or directly opposite the tear area 35, causing the tear area 35 to tear. The side wall 111 of the slot 11 continues to move between the outer peripheral walls of the adjacent battery cells 20, so as to abut and drive the separation area 37 to adhere to the outer peripheral wall of the battery cell 20, so that there is an insulating separation area 37 between the battery cell 20 and the side wall 111 of the slot 11, which improves the insulation performance of the battery cell 20.

[0066] It is understood that in other embodiments, the separation area 37 may also be separated from the cover area 31 before the cell 20 is installed on the bracket 10 and removed from the battery module 100.

[0067] like Figure 8 As shown, in one embodiment, the aluminum busbar 40 is provided with a positioning hole 45, and the bracket 10 is provided with a positioning pin 13. The positioning hole 45 and the positioning pin 13 cooperate to improve the relative positioning accuracy between the battery cell 20 and the aluminum busbar 40, which is conducive to improving the accuracy of judging the battery cell 20 being installed on the bracket 10 based on the observation hole 41 of the aluminum busbar 40 exposing the covered area 31.

[0068] The energy storage device 200 and the battery module 100 are connected by an insulator 30 in the battery module 100 between the aluminum busbar 40 and the battery cell 20. This insulator helps identify whether the battery cell 20 is installed in the designated position on the bracket 10. If part or all of the insulator 30 can be seen through the observation hole 41, it can be determined that the battery cell 20 is not installed in the designated position on the bracket 10. The installation position of the battery cell 20 on the bracket 10 needs to be adjusted to the designated position to ensure that the electrical connection terminal 21 between the aluminum busbar 40 and the battery cell 20 is accurately connected, thereby reducing the defect rate of the energy storage device 200.

[0069] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and substance of the technical solutions of this application.

Claims

1. A battery module, comprising: support; The battery cell is configured to be mounted on the bracket at a predetermined position; The battery module is characterized by: An insulating component covers one end of the battery cell and prevents the electrical connection terminals of the battery cell from being exposed. An aluminum busbar is electrically connected to the electrical connection terminal of the battery cell, and the aluminum busbar has an observation hole; when the battery cell is in the set position, the observation hole is located away from the insulating component; when the battery cell is not in the set position, the observation hole is located opposite the insulating component.

2. The battery module of claim 1, wherein: The observation hole includes a plurality of sub-holes, each sub-hole corresponding to one of the electrical connection terminals. When the battery cell is in the set position, all of the sub-holes are located away from the insulating member. When the battery cell deviates from the set position along at least one of the plurality of directions, at least one of the sub-holes is located opposite the insulating member.

3. The battery module of claim 2, wherein: The battery cell moves in a clockwise or counterclockwise direction along the circumference and is not in the set position. The aluminum busbar is provided with observation holes on opposite sides of the battery cell along the circumference.

4. The battery module of any one of claims 1 to 3, wherein: The number of battery cells is multiple, and the multiple battery cells are assembled on the bracket; the insulating component has multiple covering areas, each of the covering areas is configured to cover the corresponding battery cell and avoid the electrical connection terminal; the number of aluminum busbars is multiple, and each aluminum busbar has an observation hole corresponding to at least one battery cell. When the battery cell is in the set position, the observation hole is located in the covering area; when the battery cell is not in the set position, the observation hole is located in the covering area.

5. The battery module of claim 4, wherein: The insulating element further includes a plurality of tear zones, each tear zone being disposed around the outer periphery of a corresponding cover zone, the tear zones being configured to tear under force, such that every two adjacent cover zones are spaced apart.

6. The battery module of claim 5, wherein: The tear zone includes multiple connecting zones and multiple discontinuing zones arranged along the circumference, with a connecting zone arranged between every two adjacent discontinuing zones. The connecting zone connects to the covering zone and is configured to tear under stress.

7. The battery module of claim 6, wherein: The insulating element further includes a separation region, and each tear region is connected between the separation region and the corresponding covering region; The bracket is provided with multiple slots, and each of the battery cells is installed in the slot. The sidewall of the slot is configured to abut against the separation area, causing the tearing area to tear and move the separation area to fit against the outer peripheral wall of the battery cell.

8. The battery module of claim 4, wherein: The insulating element further includes a plurality of exposed areas, each of the covered areas and the exposed area being located within the end face of the battery cell on which the electrical connection terminal is disposed, the projection of the corresponding battery cell onto the battery cell, and the exposed area being configured to expose the electrical connection terminal when the battery cell is in the set position.

9. A battery module, comprising: support; Multiple battery cells are configured to be mounted on the bracket at predetermined positions; The battery module is characterized by: An insulating component is provided with multiple covering areas and multiple tear areas. Each tear area is arranged around the outer periphery of a corresponding covering area. The tear area is configured to tear under force. The covering area covers one end of the corresponding battery cell and avoids the electrical connection terminal of the battery cell. Multiple aluminum busbars are provided, each configured to connect at least two battery cells. The aluminum busbars and the corresponding battery cells are electrically connected. Each aluminum busbar has an observation hole corresponding to a battery cell. When a battery cell is in the set position, the observation hole is located outside the covered area. When a battery cell is not in the set position, the observation hole is located in the covered area.

10. An energy storage device, comprising: case; The battery module disposed within the housing is characterized in that the battery module is the battery module according to any one of claims 1 to 9.

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