Battery pack and glue injection method

Abstract

The invention relates to the technical field of batteries, aims to solve the problem of how to make glue injection operation of a battery pack more convenient, and provides a battery pack and a glue injection method. The battery pack comprises a battery cell assembly, a circuit board, an end cover and colloid, the circuit board is connected to the cell assembly. The end cover limits a cavity, the cavity comprises a containing groove and a glue injection channel which are communicated with each other, the containing groove is used for containing the circuit board and part of the battery cell assembly, an opening for the circuit board and the battery cell assembly to be installed is formed in one side of the containing groove, the glue injection channel is provided with a glue injection opening communicated with the opening, and the glue injection channel is configured to be in a funnel shape. The cavity is filled with the colloid, and the end cover, the circuit board and the cell assembly are bonded. The glue injection device has the beneficial effects that by arranging the funnel-shaped glue injection channel, after glue is injected from the glue injection opening, the glue is guided to flow into the containing groove through the glue injection channel, the glue can flow into the containing groove, the glue is limited by the end cover after flowing in, the glue is prevented from overflowing, and therefore the glue injection operation is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery pack and a glue injection method. Background Art

[0002] In the related art, a battery pack is provided. When injecting glue into the battery pack, it is difficult to control the glue from flowing into the space to be injected with glue, resulting in inconvenient glue injection operation. Summary of the Invention

[0003] The present application provides a battery pack and a glue injection method to solve the problem of how to make the glue injection operation of the battery pack more convenient.

[0004] According to one aspect of the present application, a battery pack is provided, including a battery cell assembly, a circuit board, an end cover, and a colloid. The circuit board is connected to the battery cell assembly. The end cover defines a cavity, the cavity includes a receiving groove and a glue injection channel that communicate with each other. The receiving groove is used to receive the circuit board and a part of the battery cell assembly. An opening for loading the circuit board and the battery cell assembly is provided on one side of the receiving groove. The glue injection channel is provided with a glue injection port that communicates with the opening, and the glue injection channel is configured in a funnel shape. The colloid fills the cavity and bonds the end cover, the circuit board, and the battery cell assembly; there are multiple glue injection channels, and the multiple glue injection channels are arranged at intervals along the edge of the opening.

[0005] For the above battery pack, by providing a funnel-shaped glue injection channel, after injecting the colloid from the glue injection port, the colloid is guided by the glue injection channel to flow into the receiving groove, which is beneficial to the flow of the glue into the receiving groove. And after the colloid flows in, it is restricted by the end cover, avoiding the overflow of the colloid. Therefore, the glue injection operation is made more convenient.

[0006] In one embodiment, the end cover includes a side plate and a bottom plate. The side plate and the bottom plate enclose the cavity. The bottom plate is disposed opposite to the opening, and the side plate is recessed away from the battery cell assembly to form the glue injection channel.

[0007] In one embodiment, the glue injection channel has a side wall and a bottom wall. The side wall and the bottom wall enclose the glue injection channel. The bottom wall is disposed opposite to the glue injection port, and the side of the bottom wall close to the battery cell assembly extends obliquely towards the direction close to the bottom plate.

[0008] In one embodiment, the side wall includes a first side wall and two second side walls. The first side wall and the two second side walls are respectively connected to the bottom wall. The first side wall is disposed opposite to the battery cell assembly, and the two second side walls are respectively connected to both sides of the first side wall. The side of the second side wall away from the first side wall extends obliquely away from the other second side wall.

[0009] In one embodiment, there are two glue injection channels and they are disposed oppositely; there are two end covers and two circuit boards respectively. The two end covers respectively correspond to the two circuit boards, and the two circuit boards are respectively connected to opposite sides of the battery cell assembly.

[0010] In one embodiment, the battery cell assembly includes a battery cell housing and a plurality of battery cells, the battery cell housing is provided with a receiving cavity, the portion of the battery cell housing located inside the end cover is provided with an opening, the opening is communicated with the receiving cavity, and the plurality of battery cells are respectively arranged in the receiving cavity. The circuit board is arranged in the opening and is respectively connected to the plurality of battery cells. The end cover is supported by the battery cell housing.

[0011] In one of the embodiments, an abutment portion is protruded from the outer side of the cell housing facing away from the accommodating cavity, and the end cover is supported on the abutment portion.

[0012] In one embodiment, the receiving groove includes a first glue injection space and a second glue injection space. The battery cell includes a battery cell body and a pole ear, the pole ear is protruding at one end of the battery cell body close to the opening, and the first glue injection space is defined between the circuit board and the battery cell body. The side of the circuit board away from the battery cell is spaced apart from the end cover to define the second glue injection space between the circuit board and the end cover. The glue injection channel is connected to the first glue injection space and the second glue injection space respectively.

[0013] In one embodiment, at least two tabs are provided on one side of the cell body close to the circuit board, the tabs are connected to the circuit board, and the at least two tabs are arranged at intervals to define a first flow channel between two adjacent tabs. A second flow channel is defined between the tabs of two adjacent cells. The first flow channel is connected to the second flow channel.

[0014] According to another aspect of the present application, a glue injection method is provided for completing the glue injection of a battery pack as described in any of the above embodiments, the glue injection method comprising: injecting the glue from the glue injection port until the glue fills the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 An exploded view of a battery pack in one embodiment of the present application.

[0017] Figure 2 for Figure 1 A three-dimensional diagram of the partial structure of the battery pack in the illustrated embodiment.

[0018] Figure 3 for Figure 1 A three-dimensional view of the partial structure of the battery pack in the illustrated embodiment from another viewing angle.

[0019] Figure 4 for Figure 3Partial enlarged view of location A in the illustrated embodiment.

[0020] Figure 5 is Figure 1 Front view of a partial structure of the battery pack in the illustrated embodiment.

[0021] Figure 6 is Figure 1 Top view of a partial structure of the battery pack in the illustrated embodiment.

[0022] Figure 7 is Figure 6 Partial sectional view of the battery pack along line B-B in the illustrated embodiment.

[0023] Figure 8 is Figure 1 Stereogram of the end cap in the illustrated embodiment.

[0024] Figure 9 is Figure 1 Top view of the end cap in the illustrated embodiment.

[0025] Figure 10 is Figure 1 Front view of the end cap in the illustrated embodiment.

[0026] Figure 11 is Figure 1 Side view of the end cap in the illustrated embodiment.

[0027] Figure 12 is Figure 1 Schematic diagram of the assembled state of the end cap and the battery cell assembly in the illustrated embodiment.

[0028] Figure 13 is Figure 1 Schematic diagram of the assembled state of the battery cell and the circuit board in the illustrated embodiment.

[0029] Figure 14 Flowchart of the glue injection method in an embodiment of the present application.

[0030] Description of main component symbols:

[0031] Battery pack 100

[0032] First glue injection space 100a

[0033] Second glue injection space 100b

[0034] Battery cell assembly 10

[0035] First flow channel 10a

[0036] Second flow channel 10b

[0037] Battery cell housing 11

[0038] Receiving cavity 11a

[0039] Open end 11a1

[0040] Abutting portion 111

[0041] Electric core 12

[0042] Electric core body 121

[0043] Tab 122

[0044] Circuit board 20

[0045] End cap 30

[0046] Cavity 30a

[0047] Receiving groove 30b

[0048] Opening 30b1

[0049] Glue injection channel 30c

[0050] Glue injection port 30c1

[0051] Side wall 301

[0052] First side wall 3011

[0053] Second side wall 3012

[0054] Bottom wall 302

[0055] Side plate 31

[0056] Bottom plate 32

[0057] Battery pack housing 50 Specific implementation manner

[0058] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0059] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is considered to be "disposed on" another element, it can be directly disposed on the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0060] 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 terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0061] Some embodiments of this application will be described in detail. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0062] Embodiment

[0063] Figure 1 is an exploded view of the battery pack 100 in an embodiment of this application; Figure 2 is Figure 1 a perspective view of a partial structure of the battery pack 100 in the shown embodiment; Figure 3 is Figure 1 a perspective view of a partial structure of the battery pack 100 in the shown embodiment from another perspective;

[0064] Figure 4 is Figure 3 a partially enlarged view of part A in the shown embodiment; Figure 5 is Figure 1 a front view of a partial structure of the battery pack 100 in the shown embodiment; Figure 6 is Figure 1 a top view of a partial structure of the battery pack 100 in the shown embodiment; Figure 7 is Figure 6 a sectional view of a partial structure of the battery pack 100 along line B-B in the shown embodiment; Figure 8 is Figure 1 a perspective view of the end cap 30 in the shown embodiment; Figure 9 is Figure 1 a top view of the end cap 30 in the shown embodiment.

[0065] Referring to Figures 1 to 6 , this embodiment provides a battery pack 100, and the battery pack 100 includes a battery cell assembly 10, a circuit board 20 (see Figure 7 ), an end cap 30, and a colloid (not shown in the figure). The circuit board 20 is connected to the battery cell assembly 10. As Figure 8 and Figure 9As shown, the end cap 30 defines a cavity 30a, and the cavity 30a includes a receiving groove 30b and a glue injection channel 30c that communicate with each other. The receiving groove 30b is used to receive the circuit board 20 and part of the battery cell assembly 10. An opening 30b1 for loading the circuit board 20 and the battery cell assembly 10 is provided on one side of the receiving groove 30b. The glue injection channel 30c is provided with a glue injection port 30c1 that communicates with the opening 30b1, and the glue injection channel 30c is configured in a funnel shape. The colloid fills the cavity 30a and bonds the end cap 30, the circuit board 20, and the battery cell assembly 10.

[0066] For the above battery pack 100, before injecting the glue, first load the circuit board 20 and the battery cell assembly 10 into the cavity 30a together, and then inject the colloid from the glue injection port 30c1, so that the colloid enters the glue injection channel 30c through the glue injection port 30c1, and then flows into the receiving groove 30b through the glue injection channel 30c, thereby filling the cavity 30a with the colloid and bonding the end cap 30, the circuit board 20, and the battery cell assembly 10. Since the glue injection channel 30c and the receiving groove 30b are separately provided, and the glue injection port 30c1 and the opening 30b1 are separately provided, after loading the circuit board 20 and the battery cell assembly 10 from the opening 30b1, the battery cell assembly 10 and the circuit board 20 do not block the glue injection port 30c1 and the glue injection channel 30c, which is convenient for injecting the colloid from the glue injection port 30c1 and for the colloid to flow into the receiving groove 30b, thus facilitating the glue injection operation. And because the glue injection channel 30c is configured in a funnel shape, it can guide the colloid injected from the glue injection port 30c1 to flow into the receiving groove 30b, further facilitating the glue injection. The colloid flowing in from the glue injection port 30c1 is restricted by the end cap 30 to prevent the colloid from overflowing, further facilitating the operation. The end cap 30 can also provide a protective effect on the colloid and reduce the aging of the colloid. And because the glue injection operation is more convenient, it is also convenient to stop the glue injection, so that the amount of colloid injected into the cavity 30a is easy to control.

[0067] Before injecting the glue, first turn the side of the end cap 30 with the opening 30b1 upward, then load the connected circuit board 20 and the battery cell assembly 10 into the opening 30b1 together, and then inject the colloid from the glue injection port 30c1. After the colloid is cured, the battery pack 100 can be turned to other directions. Optionally, the circuit board 20 and the battery cell assembly 10 are connected by welding. And because during the operation, the circuit board 20 and the battery cell assembly 10 are first connected by welding and then the glue is injected, it is beneficial to implement more complex welding processes. For example, it can meet the welding process requirements of the circuit board 20 and the battery cell assembly 10 of the soft-pack battery pack.

[0068] In some embodiments, as Figure 1 shown, the battery pack 100 further includes a battery pack housing 50, and the end cap 30 and the battery cell assembly 10 are located inside the battery pack housing 50. In this way, after the glue injection is completed, the end cap 30 and the battery cell assembly 10 can be installed inside the battery pack housing 50.

[0069] In some embodiments, as Figure 8 shown, the end cap 30 includes a side plate 31 and a bottom plate 32. The side plate 31 and the bottom plate 32 enclose a cavity 30a. The bottom plate 32 is disposed opposite to the opening 30b1. Combining Figure 7 shown, the side plate 31 is recessed toward the side away from the battery cell assembly 10 to form a glue injection channel 30c. In this way, the glue injection channel 30c is formed between the battery cell assembly 10 and the side plate 31, that is, the glue injection channel 30c communicates with the side surface of the receiving groove 30b, which is beneficial to the faster flow of the colloid from the glue injection channel 30c into the colloid, and the structure of the end cap 30 is simple and easy to manufacture.

[0070] Figure 10 For Figure 1 the front view of the end cap 30 in the shown embodiment.

[0071] In some embodiments, as Figure 7 and Figure 10 shown, the glue injection channel 30c has a side wall 301 and a bottom wall 302. The side wall 301 and the bottom wall 302 enclose the glue injection channel 30c. The bottom wall 302 is disposed opposite to the glue injection port 30c1. The side of the bottom wall 302 close to the battery cell assembly 10 extends obliquely toward the direction close to the bottom plate 32. In this way, by setting the bottom wall 302 to extend obliquely, the colloid in the glue injection channel 30c is guided to flow toward the receiving groove 30b, thereby further facilitating the flow of the colloid.

[0072] Figure 11 For Figure 1 the side view of the end cap 30 in the shown embodiment.

[0073] In some embodiments, as Figure 11 shown, the side wall 301 includes a first side wall 3011 and two second side walls 3012. The first side wall 3011 and the two second side walls 3012 are respectively connected to the bottom wall 302. The first side wall 3011 is disposed opposite to the battery cell assembly 10 (see Figure 7 ). The two second side walls 3012 are respectively connected to both sides of the first side wall 3011. Combining Figure 9 shown, the side of the second side wall 3012 away from the first side wall 3011 extends obliquely toward the direction away from the other second side wall 3012. In this way, by setting the first side wall 3011 to extend obliquely, the area of the connection between the glue injection channel 30c and the receiving groove 30b is increased, and it is further convenient for the colloid to flow from the glue injection channel 30c into the receiving groove 30b. It should be noted that the side of the second side wall 3012 away from the first side wall 3011 extends obliquely toward the direction away from the other second side wall 3012, which means that the positive projection of the surface of the second side wall 3012 close to the glue injection channel 30c and the extension line of the positive projection of the part of the side plate 31 adjacent to the second side wall 3012 close to the receiving groove 30b form an acute angle.

[0074] In some embodiments, as Figure 8 shown, there are multiple glue injection channels 30c, and the multiple glue injection channels 30c are arranged at intervals along the edge of the opening 30b1, so that the glue can flow into different positions of the receiving groove 30b more evenly during glue injection. In this embodiment, there are two glue injection channels 30c, and the two glue injection channels 30c are respectively located on opposite sides of the receiving groove 30b.

[0075] In some embodiments, as Figure 7 shown, there are two end caps 30 and two circuit boards 20 respectively. The two end caps 30 correspond to the two circuit boards 20 respectively, and the two circuit boards 20 are respectively connected to opposite sides of the battery cell assembly 10. In this way, connecting the two circuit boards 20 to the battery cell assembly 10 respectively is beneficial to improving the flexibility of the internal structure setting of the battery cell assembly 10. Before glue injection, first connect the two circuit boards 20 to opposite sides of the battery cell assembly 10 respectively, then place the opening 30b1 (see Figure 8 ) of one of the end caps 30 facing upward, then load the side of the battery cell assembly 10 connected with one circuit board 20 into this end cap 30, and inject glue into the end cap 30. After the glue is cured, place the opening 30b1 of the other end cap 30 facing upward, and after turning the battery cell assembly 10 over, load the side of the battery cell assembly 10 connected with the other circuit board 20 into the end cap 30, and then inject glue. In this way, the glue injection into the two end caps 30 is completed.

[0076] Figure 12 is Figure 1 a schematic diagram of the assembly state of the end cap 30 and the battery cell assembly 10 in the embodiment shown; Figure 13 is Figure 1 a schematic diagram of the assembly state of the battery cell 12 and the circuit board 20 in the embodiment shown.

[0077] In some embodiments, as Figure 12 and Figure 13 shown, the battery cell assembly 10 includes a battery cell housing 11 and multiple battery cells 12. Combining Figure 7 shown, the battery cell housing 11 is provided with a receiving cavity 11a, the part of the battery cell housing 11 located inside the end cap 30 is provided with an opening 11a1, the opening 11a1 is communicated with the receiving cavity 11a, and the multiple battery cells 12 are respectively arranged in the receiving cavity 11a. The circuit board 20 is arranged at the opening 11a1 and is respectively connected to the multiple battery cells 12. The end cap 30 supports the battery cell housing 11. In this way, by supporting the battery cell housing 11 with the end cap 30, there is no need to provide other support structures between the battery cell 12 and the circuit board 20, thereby reducing the blockage of the support structure when the glue flows in the receiving groove 30b, so that the flow of the glue is faster and more uniform. Optionally, adjacent battery cells 12 and between the battery cell 12 and the battery cell housing 11 are connected by foam.

[0078] In some embodiments, as Figure 7 shown, an abutting portion 111 protrudes from the outer side of the battery cell housing 11 facing away from the accommodating cavity 11a, and the end cap 30 is supported on the abutting portion 111. In this way, since the abutting portion 111 is located on the outer side of the battery cell housing 11, it does not affect the arrangement of the battery cell 12 in the battery cell housing 11 and does not affect the glue injection operation. Optionally, the abutting portion 111 extends along the edge of the opening 30b1 (see Figure 8 ), so as to increase the contact area between the abutting portion 111 and the end cap 30 and improve the support stability.

[0079] In some embodiments, as Figure 7 shown, the accommodating groove 30b includes a first glue injection space 100a and a second glue injection space 100b. The battery cell 12 includes a battery cell body 121 and a tab 122. The tab 122 protrudes from one end of the battery cell body 121 close to the open end 11a1 (see Figure 12 ). A first glue injection space 100a is defined between the circuit board 20 and the battery cell body 121. The side of the circuit board 20 away from the battery cell 12 is spaced from the end cap 30 to define a second glue injection space 100b between the circuit board 20 and the end cap 30. The glue injection channels 30c communicate with the first glue injection space 100a and the second glue injection space 100b respectively, so that after the colloid flows into the glue injection channels 30c, it can flow into the first glue injection space 100a and the second glue injection space 100b respectively from the glue injection channels 30c, which is beneficial to make the colloid flow more quickly and evenly.

[0080] In some embodiments, as Figure 13 shown, at least two tabs 122 are provided on the side of the battery cell body 121 close to the circuit board 20. The tabs 122 are connected to the circuit board 20, and the at least two tabs 122 are spaced apart to define a first flow channel 10a between two adjacent tabs 122. A second flow channel 10b is defined between the tabs 122 of two adjacent battery cells 12. The first flow channel 10a communicates with the first flow channel 10a with each other. In this way, after the colloid is injected, the colloid can flow through the first flow channel 10a and the second flow channel 10b respectively, so as to flow to different positions, making the flow of the colloid more comprehensive and uniform. In this embodiment, two tabs 122 are provided on each battery cell body 121. It should be noted that the multiple battery cells 12 can be arranged in different directions respectively.

[0081] In some embodiments, as Figure 7 shown, the multiple battery cells 12 are divided into two groups. The two groups of battery cells 12 are respectively located in two opposite parts of the battery cell housing 11. The tabs 122 of one group of battery cells 12 are located on one side of the battery cell housing 11 and are welded to one of the circuit boards 20, and the tabs 122 of the other group of battery cells 12 are located on the other side of the battery cell housing 11 and are welded to the other circuit board 20.

[0082] Figure 14 It is a flowchart of the glue injection method in an embodiment of the present application.

[0083] See Figure 14 , according to another aspect of the present application, a glue injection method is provided for performing glue injection on the battery pack 100 described in any one of the above embodiments. The glue injection method includes:

[0084] S110: Inject the colloid from the glue injection port 30c1 until the colloid fills the cavity 30a.

[0085] In this way, by injecting glue through the funnel-shaped glue injection port 30c1, it is convenient for the colloid to be injected from the glue injection port 30c1 and is beneficial to the flow of the colloid from the glue injection channel 30c into the receiving groove 30b, thus facilitating the glue injection operation and making it easier to control the amount of the injected colloid.

[0086] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A battery pack, characterized in that, Comprising: a battery cell assembly; a circuit board connected to the battery cell assembly; an end cap defining a cavity, the cavity including a receiving groove and a glue injection channel communicating with each other, the receiving groove being for receiving the circuit board and part of the battery cell assembly, an opening for loading the circuit board and the battery cell assembly being provided on one side of the receiving groove, a glue injection port communicating with the opening being provided in the glue injection channel, and the glue injection channel being configured in a funnel shape; and, a colloid filling the cavity and bonding the end cap, the circuit board and the battery cell assembly; wherein there are a plurality of the glue injection channels, and the plurality of glue injection channels are spaced along the edge of the opening.

2. The battery pack according to claim 1, wherein: the end cap includes a side plate and a bottom plate, the side plate and the bottom plate enclose the cavity, the bottom plate is disposed opposite to the opening, and the side plate is recessed away from the battery cell assembly to form the glue injection channel.

3. The battery pack according to claim 2, wherein: the glue injection channel has a side wall and a bottom wall, the side wall and the bottom wall enclose the glue injection channel, the bottom wall is disposed opposite to the glue injection port, and one side of the bottom wall close to the battery cell assembly extends obliquely towards the bottom plate.

4. The battery pack according to claim 3, wherein: the side wall includes a first side wall and two second side walls, the first side wall and the two second side walls are respectively connected to the bottom wall, the first side wall is disposed opposite to the battery cell assembly, and the two second side walls are respectively connected to both sides of the first side wall; one side of the second side wall away from the first side wall extends obliquely away from the other second side wall.

5. The battery pack according to claim 1, wherein: there are two glue injection channels and they are oppositely arranged; there are two end caps and two circuit boards respectively, the two end caps respectively correspond to the two circuit boards, and the two circuit boards are respectively connected to opposite sides of the battery cell assembly.

6. The battery pack according to claim 1, wherein: the battery cell assembly includes a battery cell housing and a plurality of battery cells, the battery cell housing is provided with a receiving cavity, an open end is provided on a part of the battery cell housing located inside the end cap, the open end communicates with the receiving cavity, and the plurality of battery cells are respectively disposed in the receiving cavity; the circuit board is disposed at the open end and is respectively connected to the plurality of battery cells; the end cap supports the battery cell housing.

7. The battery pack according to claim 6, wherein: a contact portion is convexly provided on an outer side of the battery cell housing facing away from the receiving cavity, and the end cap supports on the contact portion.

8. The battery pack according to claim 6, wherein: the receiving groove includes a first glue injection space and a second glue injection space; each battery cell includes a battery cell body and a tab, the tab is convexly provided at one end of the battery cell body close to the open end, and the first glue injection space is defined between the circuit board and the battery cell body; a space is provided between a side of the circuit board away from the battery cell and the end cap to define the second glue injection space between the circuit board and the end cap; The glue injection channels are respectively communicated with the first glue injection space and the second glue injection space.

9. The battery pack according to claim 8, wherein: At least two of the tabs are provided on a side of the cell body close to the circuit board, the tabs are connected to the circuit board, and the at least two tabs are spaced apart to define a first flow channel between two adjacent tabs; A second flow channel is defined between the tabs of two adjacent cells; The first flow channel communicates with the first flow channel.

10. A glue injection method, characterized in that, For performing glue injection on the battery pack according to any one of claims 1 to 9, the glue injection method includes: Injecting the colloid from the glue injection port until the colloid fills the cavity.

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