Battery module and energy storage power supply

Abstract

The utility model relates to the technical field of energy storage power supplies, and discloses a battery module and an energy storage power supply, and the battery module comprises a battery cell bracket, a plurality of battery cells and a first bus bar. The cell bracket is provided with a plurality of accommodating cavities, and a top plate of the cell bracket is provided with a plurality of first through holes in one-to-one correspondence with the accommodating cavities; a battery cell is arranged in a containing cavity; the first convergence piece comprises a first main body part and a plurality of first protruding parts, each first protruding part comprises a first connecting part and a first welding piece, the first welding pieces and the first main body part are oppositely arranged in a spaced mode, each first welding piece is connected with the corresponding first main body part through the corresponding first connecting part, and each first main body part is provided with a plurality of first welding openings; one first welding opening is aligned with one first welding piece; along the direction from the top plate to the accommodating cavity, a first protruding part is inserted into a first through hole, and a first welding piece is welded to a pole, facing the first through hole, of a battery cell; in this way, the safety performance of the battery module can be improved.

Description

Technical Field

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

[0002] Current energy storage power supply battery modules include a cell support frame, multiple cells, and busbars. The cell support frame has multiple cavities, the same number as the number of cells, with one cell housed in each cavity. The terminals of multiple cells are electrically connected by welding the busbars together. To prevent interference between the cell support frame and the busbars, which could prevent the busbars from welding to the cell terminals, the end of the cell with the terminal is designed to protrude outside the cell support frame. This exposed end of the cell reduces the protective effect of the cell support frame on the cells. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this application is to provide a battery module and energy storage power supply to at least solve the problems existing in the prior art.

[0004] According to a first aspect of this application, a battery module is provided, comprising: a cell support, a plurality of cells, and a first busbar. The battery cell support is provided with a plurality of receiving cavities. The battery cell support includes a top plate, and the top plate is provided with a plurality of first through holes corresponding one-to-one with the receiving cavities. The first through holes communicate with the receiving cavities. A battery cell is disposed in a receiving cavity, and one terminal of each battery cell is disposed facing the first through hole. The first busbar includes a first main body and a plurality of first protrusions. The first protrusion includes a first connecting part and a first welding piece. Along the direction from the top plate to the receiving cavity, the first welding pieces are disposed at intervals relative to the first main body. A first connecting part connects a first welding piece to the first main body. Each first welding piece is located on the same side of the first main body. The first main body is provided with a plurality of first welding ports. Along the direction from the top plate to the receiving cavity, the first welding ports penetrate the first main body and are aligned with a first welding piece. Along the direction from the top plate to the receiving cavity, a first protrusion is inserted into a first through hole, and a first welding piece is welded to a terminal of a battery cell facing the first through hole.

[0005] In one or more of the above optional embodiments, there is a preset gap between the surface of the first main body facing the top plate and the surface of the top plate facing away from the receiving cavity.

[0006] In one or more of the above optional embodiments, the cell support includes a base plate disposed opposite to the top plate, the base plate having a plurality of second through holes corresponding one-to-one with the receiving cavity, the second through holes communicating with the receiving cavity; another terminal post of the cell is disposed facing the second through hole; the battery module further includes a second busbar, the second busbar including a second main body and a plurality of second protrusions, the second protrusions including a second connecting portion and a second welding piece, the second welding pieces being disposed at intervals opposite to the second main body along the thickness direction of the second main body, a second connecting portion connecting a second welding piece to the second main body, each second welding piece being located on the same side of the second main body, the second main body having a plurality of second welding ports, the second welding ports penetrating the second main body along the thickness direction of the second main body, and a second welding port being aligned with a second welding piece; along the direction from the base plate to the receiving cavity, a second protrusion is inserted into a second through hole, and a second welding piece is welded to a terminal post of the cell facing the second through hole.

[0007] In one or more of the above optional embodiments, there is a preset gap between the surface of the second main body facing the base plate and the surface of the base plate facing away from the receiving cavity.

[0008] In one or more of the above optional embodiments, the top plate is provided with a first positioning component, the first positioning component includes at least two first positioning posts, the first busbar is provided with at least two first positioning holes, and a first positioning post is inserted into a first positioning hole; and / or the bottom plate is provided with a second positioning component, the second positioning component includes at least two second positioning posts, the second busbar is provided with at least two second positioning holes, and a second positioning post is inserted into a second positioning hole.

[0009] In one or more of the above optional embodiments, the first welding piece is provided with a first observation hole, which penetrates the first welding piece along the thickness direction of the first welding piece; and / or the second welding piece is provided with a second observation hole, which penetrates the second welding piece along the thickness direction of the second welding piece.

[0010] In one or more of the above optional embodiments, the number of the first busbars is at least two, the top plate is provided with a first strip-shaped protrusion that separates adjacent first busbars; and / or the number of the second busbars is at least two, the bottom plate is provided with a second strip-shaped protrusion that separates adjacent second busbars.

[0011] In one or more of the above optional embodiments, the first busbar and the second busbar connect a plurality of the battery cells to form a battery module circuit. The battery module further includes a positive electrode and a negative electrode. The first busbar connected to the total positive terminal of the battery module circuit or the second busbar connected to the total positive terminal of the battery module circuit is called the total positive busbar. The first busbar connected to the total negative terminal of the battery module circuit or the second busbar connected to the total negative terminal of the battery module circuit is called the total negative busbar. The positive electrode is connected to the total positive busbar, and the negative electrode is connected to the total negative busbar.

[0012] In one or more of the above optional embodiments, the periphery of the top plate is provided with a first annular protrusion; and / or the periphery of the bottom plate is provided with a second annular protrusion.

[0013] According to a second aspect of this application, an energy storage power source is provided, including the battery module as described above.

[0014] The beneficial effects of this application embodiment are: by providing a first protrusion on the first busbar, and after the first protrusion is inserted into the first through hole, it is welded to the terminal of the battery cell located in the receiving cavity, so that the terminal of the battery cell can be connected to the first busbar without being exposed outside the battery cell bracket, thereby the battery cell bracket can better wrap and protect the battery cell, so as to improve the safety performance of the battery module. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 A perspective view of a battery module provided in an embodiment of this application;

[0017] Figure 2 Another perspective view of a battery module provided in an embodiment of this application;

[0018] Figure 3 This is an exploded view of a battery module provided in this embodiment;

[0019] Figure 4 This is a schematic diagram of a battery module provided in an embodiment;

[0020] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0021] Figure 6 for Figure 5 A magnified view of point B;

[0022] Figure 7 for Figure 5 A magnified view of point C;

[0023] Figure 8 A schematic diagram of the first busbar of a battery module provided in an embodiment of this application;

[0024] Figure 9 This is a schematic diagram of the second busbar of a battery module provided in an embodiment of this application. Detailed Implementation

[0025] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0027] In the description of this specification, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0029] Please see Figure 1-6 and Figure 8The battery module 1000 includes a cell support 1, several cells 2, and a first busbar 3. The cell support 1 has several receiving cavities a, and includes a top plate 111. The top plate 111 has several first through holes 111a corresponding to the receiving cavities a, and the first through holes 111a communicate with the receiving cavities a. A cell 2 is disposed in a receiving cavity a, and one terminal 21 of each cell 2 faces the first through hole 111a. The first busbar 3 includes a first main body 31 and a plurality of first protrusions 32. Each first protrusion 32 includes a first connecting portion 321 and a first welding piece 322. Along the direction from the top plate 111 toward the receiving cavity a, the first welding pieces 322 are spaced apart from the first main body 31. A first connecting portion 321 connects a first welding piece 322 to the first main body 31. Each first welding piece 322 is located on the same side of the first main body 31. The first main body 31 is provided with a plurality of first welding ports 31a. Along the direction from the top plate 111 toward the receiving cavity a, the first welding ports 31a penetrate the first main body 31, and each first welding port 31a is aligned with a first welding piece 322. Along the direction from the top plate 11 toward the receiving cavity a, a first protrusion 32 is inserted into a first through hole 111a, and a first welding piece 322 is welded to a terminal post 21 of a battery cell 2 facing the first through hole 111a.

[0030] This application provides a first protrusion 32 on the first busbar 3. After the first protrusion 32 is inserted into the first through hole 111a, it is welded to the terminal post 21 of the battery cell 2 located in the receiving cavity a. This allows the terminal post 21 of the battery cell 2 to be connected to the first busbar 3 without being exposed outside the battery cell bracket 1. As a result, the battery cell bracket 1 can better wrap and protect the battery cell 2, thereby improving the safety performance of the battery module 1000.

[0031] In some embodiments, the first welding piece 322 includes, but is not limited to, being welded to the electrode post 21 of the cell 2 facing the first through hole 111a by laser welding.

[0032] Please see Figure 6 and Figure 8 In some embodiments, one end of the first connecting portion 321 is arranged around the periphery of the first welding piece 322, and the other end of the first connecting portion 321 is arranged around the end of the first welding port 31a near the receiving cavity a. The first welding piece 322 and the first connecting portion 321 form a first welding groove 32a. The groove opening of the first welding groove 32a is connected to the first welding port 31a. The bottom of the first welding groove 32a, that is, the surface of the first welding piece 322 facing away from the receiving cavity a, is the welding area for laser welding.

[0033] In some embodiments, the first busbar 3 is made of aluminum.

[0034] In some embodiments, the first protrusion 32 is obtained by pressing sheet-shaped aluminum material through a mold. The aluminum material is squeezed and recessed by the mold to form a plurality of first protrusions 32. The other parts of the aluminum material, excluding the first protrusions 32, constitute the first main body 31.

[0035] Please see Figure 5 and Figure 6 In some embodiments, a preset gap h1 exists between the surface of the first main body 31 facing the top plate 111 and the surface of the top plate 111 facing away from the receiving cavity a. After the design dimensions of the battery cell 2 are determined, the size of the preset gap h1 between the surface of the first main body 31 facing the top plate 111 and the surface of the top plate 111 facing away from the receiving cavity a is determined by the height H1 of the first protrusion 32. By setting the height H1 of the first protrusion 32, a sufficiently large preset gap h1 is achieved between the surface of the first main body 31 facing the top plate 111 and the surface of the top plate 111 facing away from the receiving cavity a. This ensures that the first busbar 3 has sufficient mobility along the thickness direction of the top plate 111, thereby ensuring that the first welding piece 322 can be tightly attached to the terminal post 21 of the battery cell 2 along the direction of the first busbar 3 towards the battery cell 2, which is beneficial to improving the welding effect of the first welding piece 322. To avoid the first welding piece 322 being unable to continue moving towards the battery cell 2 during the welding process of the first busbar 3 and the battery cell 2, because the first main body 31 is abutting against the surface of the top plate 111 facing away from the receiving cavity a, and thus the first welding piece 322 cannot be attached to the surface of the battery cell 2's pole post 21 facing the first welding piece 322.

[0036] Please see Figure 1-5 , Figure 7 and Figure 9In some embodiments, the cell support 1 includes a base plate 121 disposed opposite to the top plate 111. The base plate 121 is provided with a plurality of second through holes 121a corresponding one-to-one with the receiving cavity a, and the second through holes 121a communicate with the receiving cavity a. The other terminal post 22 of the cell 2 is disposed facing the second through hole 121a. The battery module 1000 also includes a second busbar 4, which includes a second main body 41 and a plurality of second protrusions 42. Each second protrusion 42 includes a second connecting portion 421 and a second welding piece 422. Along the direction from the base plate 121 towards the receiving cavity a, the second welding pieces 422 are spaced apart from the second main body 41. A second connecting portion 421 connects a second welding piece 422 to the second main body 41. Each second welding piece 422 is located on the same side of the second main body 41. The second main body 41 is provided with a plurality of second welding ports 41a. Along the direction from the base plate 121 towards the receiving cavity a, the second welding ports 41a penetrate the second main body 41, and are aligned with a second welding piece 422. Along the direction from the base plate 121 towards the receiving cavity a, a second protrusion 42 is inserted into a second through hole 121a, and a second welding piece 422 is welded to a terminal post 22 of a battery cell 2 facing the second through hole 121a.

[0037] After the second protrusion 42 is inserted into the second through hole 121a, it is welded to the terminal post 222 of the battery cell 2 located in the receiving cavity a, so that the terminal post 22 of the battery cell 2 can be connected to the second busbar 4 without being exposed outside the battery cell bracket 1. In this way, the battery cell bracket 1 can better wrap and protect the battery cell 2, thereby improving the safety performance of the battery module 1000.

[0038] In some embodiments, the second welding piece 422 includes, but is not limited to, being welded to the electrode post 22 of the second battery cell 2 facing the second through hole 121a by laser welding.

[0039] Please see Figure 7 and Figure 9 In some embodiments, one end of the second connecting portion 421 is arranged around the periphery of the second welding piece 422, and the other end of the second connecting portion 421 is arranged around the end of the second welding port 41a facing the receiving cavity a. The second welding piece 422 and the second connecting portion 421 form a second welding groove 42a. The groove opening of the second welding groove 42a is connected to the second welding port 41a. The bottom of the second welding groove 42a, that is, the surface of the second welding piece 422 facing away from the receiving cavity a, is the welding area for laser welding.

[0040] In some embodiments, the second busbar 4 is made of aluminum.

[0041] In some embodiments, the second protrusion 42 is obtained by pressing sheet-shaped aluminum material through a mold. The aluminum material is squeezed and recessed by the mold to form a plurality of second protrusions 42. The other parts of the aluminum material, excluding the second protrusions 42, constitute the second main body 41.

[0042] Please see Figure 5 and Figure 7 In some embodiments, a predetermined gap h2 is provided between the surface of the second main body 41 facing the base plate 121 and the surface of the base plate 121 facing away from the receiving cavity a. The predetermined gap h2 between the surface of the second main body 41 facing the base plate 121 and the surface of the base plate 121 facing away from the receiving cavity a allows the second busbar 4 to have sufficient range of motion along the thickness direction of the base plate 121, ensuring that the second welding piece 422 can be tightly attached to the terminal post 22 of the battery cell 2 along the direction of the second busbar 4 toward the battery cell 2, which is beneficial to improving the welding effect of the second welding piece 422.

[0043] Please see Figure 3 and Figure 5 In some embodiments, the cell support 1 includes a first support 11 and a second support 12. The first support 11 includes a top plate 111, a first side plate 112, and a plurality of first partitions 113 disposed on the side of the top plate 111 facing the receiving cavity a. The second support 12 includes a bottom plate 121, a second side plate 122, and a plurality of second partitions 123 disposed on the side of the bottom plate 121 facing the receiving cavity a. The end of the first side plate 112 away from the top plate 111 is connected to the end of the second side plate 122 away from the bottom plate 121. The top plate 111, the first side plate 112, and the plurality of first partitions 113 together enclose the upper half of a plurality of receiving cavities a, and the bottom plate 121, the second side plate 122, and the plurality of second partitions 123 together enclose the lower half of a plurality of receiving cavities a.

[0044] In some embodiments, the first bracket 11 is screwed to the second bracket 12.

[0045] In some embodiments, the first busbar 3 and the second busbar 4 connect a plurality of battery cells 2 to form a battery module circuit.

[0046] It is understandable that there can be more than one first busbar 3 and more than one second busbar 4.

[0047] It is also understandable that the battery module circuit can be configured as a series circuit, parallel circuit, or series-parallel circuit composed of several battery cells 2, depending on actual needs.

[0048] Please see Figure 1 and Figure 3In some embodiments, the battery module 1000 further includes a positive electrode 5 and a negative electrode 6. The first busbar 3 connected to the total positive terminal of the battery circuit or the second busbar 4 connected to the total positive terminal of the battery module circuit is called the total positive busbar. The first busbar 3 connected to the total negative terminal of the battery module circuit or the second busbar 4 connected to the total negative terminal of the battery module circuit is called the total negative busbar. The positive electrode 5 is connected to the total positive busbar, and the negative electrode 6 is connected to the total negative busbar.

[0049] Please see Figure 1-5 Taking a configuration where there are multiple first busbars 3 and second busbars 4, and the battery cells 2 are connected in parallel in pairs, and then each group of battery cells 2 is connected in series to form a battery module circuit, with one first busbar 3 connected to the total positive terminal of the battery module circuit as the total positive busbar, and the other first busbar 3 connected to the total negative terminal of the battery module circuit as the total negative busbar, as an example. Two battery cells 2 in the same group are placed in two adjacent receiving cavities a, and the positive and negative terminals of the two battery cells 2 in the same group are oriented in the same direction (i.e., the positive terminal 21 of the two battery cells 2 both face the top plate 111, and the negative terminal 22 both face the bottom plate 121, or, the positive terminal 22 of the two battery cells 2 both face the bottom plate 121, and the negative terminal 21 both face the top plate 111). The battery cells 2 in the same group are connected in parallel, and each group of battery cells 2 is then connected in series to form a battery module 1000 circuit.

[0050] Specifically, both the main positive busbar and the main negative busbar are provided with two first protrusions 32. The first busbar 3 other than the main positive busbar and the main negative busbar are provided with four first protrusions 32. Each second busbar 4 is provided with four second protrusions 42. In one group of battery cells 2, the two positive terminals 21 are both facing the top plate 111 and are respectively welded to the two first welding pieces 322 of the main positive busbar. The negative terminals 22 of this group of battery cells 2 face the bottom plate 121 and are respectively welded to the two second welding pieces 422 of a second busbar 4. In another group of battery cells 2, the two negative terminals 21 are both facing the top plate 111 and are respectively welded to the two first welding pieces 322 of the main negative busbar. The positive terminals 22 of this group of battery cells 2 face the bottom plate 121 and are respectively welded to the two second welding pieces 422 of a second busbar 4. In the remaining battery cells 2, the terminals 21 of two battery cells 2 in the same group facing the top plate 111 are respectively welded to the two first welding pieces 322 of the same first busbar 3. The other two first welding pieces 322 of the first busbar 3 are connected to the other... Two cells 2 in one group are welded to the terminals 21 of the top plate 111, that is, a first busbar 3 is connected to the terminals 21 of the two groups of cells 2 facing the top plate 111, and the polarity of the terminals 21 between the two groups of cells 2 connected to the same first busbar 3 is opposite; the two groups of cells 2 connected to the same first busbar 3 are respectively connected to two second busbars 4. Specifically, the terminals 22 of two cells 2 in the same group facing the bottom plate 121 are respectively welded to the two second welding pieces 422 of the same second busbar 4. The other two second welding pieces 422 of the second busbar 4 are welded to the terminals 22 of two cells 2 in another group facing the bottom plate 121, that is, a second busbar 4 is connected to the terminals 22 of the two groups of cells 2 facing the bottom plate 121, and the polarity of the terminals 22 between the two groups of cells 2 connected to the same second busbar 4 is opposite.

[0051] Please see Figure 1 and Figure 8 In some embodiments, the top plate 111 is provided with a first positioning component 114, which includes at least two first positioning posts 1141. The first busbar 3 is provided with at least two first positioning holes 3a, and a first positioning post 1141 is inserted into a first positioning hole 3a. The first positioning hole 3a and the first positioning post 1141 cooperate to position the first busbar 3, so that each first welding piece 322 is aligned with the electrode post 21 of each cell 2 facing the first through hole 111a, thereby facilitating welding.

[0052] Please see Figure 2 and Figure 9In some embodiments, the base plate 121 is provided with a second positioning component 124, which includes at least two second positioning posts 1241. The second busbar 4 is provided with at least two second positioning holes 4a, and a second positioning post 1241 is inserted into a second positioning hole 4a. The second positioning holes 4a and the second positioning posts 1241 cooperate to position the second busbar 4, so that each second welding piece 422 is aligned with the electrode post 22 of each cell 2 facing the second through hole 121a, thereby facilitating welding.

[0053] Please see Figure 6 and Figure 8 In some embodiments, the first welding piece 322 is provided with a first observation hole 3b, which extends through the first welding piece 322 along its thickness direction. The first observation hole 3b is used for the user to view the electrode post 21 of the battery cell 2 facing the first through hole 111a.

[0054] Please see Figure 7 and Figure 9 In some embodiments, the second welding piece 422 is provided with a second observation hole 4b, which extends through the second welding piece 422 along its thickness direction. The second observation hole 4b is used for the user to view the electrode post 22 of the battery cell 2 facing the second through hole 121a.

[0055] Please see Figure 1 In some embodiments, the number of first busbars 3 is at least two, and the top plate 111 is provided with a first strip-shaped protrusion 115, which separates adjacent first busbars 3. By providing the first strip-shaped protrusion 115, it is possible to prevent the first busbars 3 from being placed in the wrong position during the assembly of the battery module 1000, which could lead to a short circuit fault in the battery cell 2.

[0056] Please see Figure 2 In some embodiments, the number of second busbars 4 is at least two, and the base plate 121 is provided with a second strip-shaped protrusion 125, which separates adjacent second busbars 4. By providing the second strip-shaped protrusion 125, it is possible to prevent the second busbars 4 from being placed in the wrong position during the assembly of the battery module 1000, which could lead to a short circuit fault in the battery cell 2.

[0057] Please see Figure 1 In some embodiments, a first annular protrusion 116 is provided on the periphery of the top plate 111. The first annular protrusion 116 is used to protect the first busbar 3 to reduce the risk of foreign objects colliding with the first busbar 3.

[0058] Please see Figure 1 and Figure 3In some embodiments, the first annular protrusion 116 is provided with a first notch 116a and a second notch 116b. One end of the positive electrode 5 is connected to the main positive busbar, and the other end of the positive electrode 5 protrudes from the side wall of the cell support 1 after passing through the first notch 116a. One end of the negative electrode 6 is connected to the main negative busbar, and the other end of the negative electrode 6 protrudes from the side wall of the cell support 1 after passing through the second notch 116b.

[0059] Please see Figure 2 In some embodiments, a second annular protrusion 126 is provided on the periphery of the base plate 121. The second annular protrusion 126 is used to protect the second busbar 4 to reduce the risk of collision between foreign objects and the second busbar 4.

[0060] Based on the same inventive concept, this application also provides an energy storage power supply, including the battery module 1000 in any of the above embodiments.

[0061] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A battery module, It is characterized in that include: A cell support is provided with a plurality of accommodating cavities, the cell support comprises a top plate, the top plate is provided with a plurality of first through holes corresponding to the accommodating cavities one by one, and the first through holes are communicated with the accommodating cavities; A plurality of battery cells, wherein one of the battery cells is disposed in one of the accommodating chambers, and one pole of each of the battery cells is disposed toward the first through hole; A first busbar, comprising a first main body and a plurality of first protrusions, wherein the first protrusion comprises a first connection portion and a first welding piece, wherein the first welding piece and the first main body are arranged with a relative interval along the direction from the top plate to the accommodating cavity, wherein a first connection portion connects a first welding piece to the first main body, wherein each of the first welding pieces is located on the same side of the first main body, and the first main body is provided with a plurality of first welding ports, wherein the first welding ports penetrate the first main body along the direction from the top plate to the accommodating cavity, and a first welding port is aligned with a first welding piece; Along the direction from the top plate to the accommodating cavity, a first protrusion is inserted into a first through hole, and a first welding sheet is welded to a pole of the battery cell facing the first through hole.

2. The battery module according to claim 1, It is characterized in that A preset gap is provided between a surface of the first main body portion facing the top plate and a surface of the top plate facing away from the accommodating cavity.

3. The battery module according to claim 1 or 2, It is characterized in that The cell support comprises a bottom plate arranged opposite to the top plate, the bottom plate is provided with a plurality of second through holes corresponding to the accommodating cavities one by one, and the second through holes are communicated with the accommodating cavities; Another pole of the battery cell is arranged toward the second through hole; The battery module further includes a second busbar, the second busbar includes a second main body and a plurality of second protrusions, the second protrusion includes a second connection portion and a second welding piece, the second welding piece and the second main body are arranged with a relative interval along the direction from the bottom plate to the accommodating cavity, a second connection portion connects a second welding piece to the second main body, each of the second welding pieces is located on the same side of the second main body, the second main body is provided with a plurality of second welding ports, the second welding ports penetrate the second main body along the direction from the bottom plate to the accommodating cavity, and a second welding port is aligned with a second welding piece; Along the direction from the bottom plate to the accommodating cavity, a second protrusion is inserted into a second through hole, and a second welding piece is welded to a pole of the battery cell facing the second through hole.

4. The battery module according to claim 3, It is characterized in that A preset gap is provided between a surface of the second main body portion facing the bottom plate and a surface of the bottom plate facing away from the accommodating cavity.

5. The battery module according to claim 3, It is characterized in that The top plate is provided with a first positioning assembly, the first positioning assembly includes at least two first positioning posts, the first busbar is provided with at least two first positioning holes, one of the first positioning posts is inserted into one of the first positioning holes; and / or The bottom plate is provided with a second positioning assembly, the second positioning assembly includes at least two second positioning posts, the second busbar is provided with at least two second positioning holes, and one of the second positioning posts is inserted into one of the second positioning holes.

6. The battery module according to claim 3, It is characterized in that The first welding sheet is provided with a first observation hole, and the first observation hole penetrates the first welding sheet along the thickness direction of the first welding sheet; and / or The second welding sheet is provided with a second observation hole, and the second observation hole penetrates the second welding sheet along the thickness direction of the second welding sheet.

7. The battery module according to claim 3, It is characterized in that The number of the first busbars is at least two, the top plate is provided with first strip-shaped protrusions, and the first strip-shaped protrusions separate adjacent first busbars; and / or The number of the second busbars is at least two, and the bottom plate is provided with second strip-shaped protrusions, which separate adjacent second busbars.

8. The battery module according to claim 3, It is characterized in that The first bus bar and the second bus bar connect several of the battery cells to form a battery module circuit. The battery module also includes a positive electrode sheet and a negative electrode sheet. The first bus bar connected to the total positive electrode of the battery module circuit or the second bus bar connected to the total positive electrode of the battery module circuit is called a total positive electrode bus bar, and the first bus bar connected to the total negative electrode of the battery module circuit or the second bus bar connected to the total negative electrode of the battery module circuit is called a total negative electrode bus bar. The positive electrode sheet is connected to the total positive electrode bus bar, and the negative electrode sheet is connected to the total negative electrode bus bar.

9. The battery module according to claim 3, It is characterized in that The periphery of the top plate is provided with a first annular protrusion; and / or A second annular protrusion is arranged on the periphery of the bottom plate.

10. An energy storage power source, It is characterized in that Comprising a battery module as described in any one of claims 1 to 9.

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