Bus units, CCS components, battery modules and battery packs

Abstract

The utility model belongs to the field of battery technology, and discloses a bus unit, a CCS assembly, a battery module, and a battery pack. The bus unit is used to be electrically connected to a battery cell, and an electrode area and a pressure relief structure are arranged at one end of the battery cell. The bus unit includes a bus and an insulating and heat-insulating part. The bus includes a connected conductive part and a first connecting part, and the first connecting part is electrically connected to the electrode area. The insulating and heat-insulating part includes a first insulating and heat-insulating film, and the first insulating and heat-insulating film is covered on the side of the conductive part facing the battery cell and opposite to the pressure relief structure, and the pressure relief structure is separated from the conductive part by the first insulating and heat-insulating film. Due to the heat-insulating barrier effect of the first insulating and heat-insulating film, it can prevent the thermal runaway ejection from directly connecting the battery cell and the bus to cause a short circuit, and can prevent the high temperature from spreading to the bus, thereby improving the safety and reliability of the battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a bus unit, a CCS component, a battery module and a battery pack. Background Art

[0002] A battery pack usually includes a box and a battery module disposed in the box. The battery module includes multiple battery cells, which are connected in series and parallel through a bus. Some battery cells have both a positive electrode and a negative electrode at one end, and are also provided with a pressure relief structure battery cell. When a battery cell has thermal runaway, the conductive materials such as the pole piece, electrolyte, and graphite ejected from the pressure relief structure may directly connect the bus and the battery cell, causing a short circuit between the battery cell and the bus, and even causing continuous short circuits and thermal runaway in adjacent batteries.

[0003] Therefore, there is an urgent need for a bus unit, a CCS assembly, a battery module and a battery pack to solve the above problems existing in the prior art. Utility Model Content

[0004] The utility model aims to provide a bus unit, a CCS assembly, a battery module and a battery pack, which can prevent the thermal runaway ejection of the battery cell from directly connecting the battery cell and the bus to cause a short circuit, thereby improving safety and reliability.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, a busbar unit is provided, which is used to be electrically connected to a battery cell, wherein an electrode area and a pressure relief structure are provided at one end of the battery cell, and the busbar unit comprises:

[0007] A bus bar, comprising a connected conductive portion and a first connecting portion, wherein the first connecting portion is electrically connected to the electrode region;

[0008] The insulating and heat-insulating part comprises a first insulating and heat-insulating film, wherein the first insulating and heat-insulating film is covered on a side of the conductive part facing the battery core and is opposite to the pressure relief structure, and the pressure relief structure is separated from the conductive part by the first insulating and heat-insulating film.

[0009] As a preferred solution of the busbar unit provided by the utility model, the insulating and heat-insulating part further includes a second insulating and heat-insulating film, and the second insulating and heat-insulating film is covered on a side of the conductive part facing away from the battery core.

[0010] As a preferred solution of the busbar unit provided by the utility model, the insulating and heat-insulating part also includes a connecting film, the first insulating and heat-insulating film and the second insulating and heat-insulating film are connected by the connecting film, and the connecting film is covered on the side edge of the conductive part.

[0011] As a preferred solution of the busbar unit provided by the utility model, the first insulating and heat-insulating film and / or the second insulating and heat-insulating film and / or the connecting film are bonded to the conductive part.

[0012] As a preferred solution of the busbar unit provided by the utility model, the first insulating and heat-insulating film and / or the second insulating and heat-insulating film and / or the connecting film is a PI film or a mica paper film.

[0013] As a preferred solution of the busbar unit provided by the utility model, the thickness of the first insulating and heat-insulating film and / or the second insulating and heat-insulating film and / or the connecting film is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0014] As a preferred solution of the bus unit provided by the utility model, the electrode area is circular, and one side of the first insulating heat-insulating film and / or the second insulating heat-insulating film is provided with a first arc-shaped edge, and the first arc-shaped edge is arranged around the electrode area.

[0015] In a second aspect, a CCS assembly is provided, comprising a bracket and the bus unit as described above, wherein the bus unit is mounted on the bracket.

[0016] In a third aspect, a battery module is provided, comprising a cell module and the CCS assembly as described above, wherein the cell module comprises a plurality of the cells, and the CCS assembly electrically connects the plurality of cells.

[0017] In a fourth aspect, a battery pack is provided, comprising a box and at least one battery module as described above, wherein the battery module is installed in the box;

[0018] The CCS components are arranged on both sides of the battery module along the Z direction, and the Z direction is arranged at an angle α with the bottom plate of the box body, and α is less than or equal to 15°; each bracket of the CCS component is provided with a contoured portion adapted to the battery cell, and the battery cell cooperates with the contoured portion.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a bus unit, a CCS component, a battery module and a battery pack. The bus unit is used to be electrically connected to a battery cell. One end of the connected battery cell is provided with an electrode area and a pressure relief structure. A first insulating heat-insulating film is provided on the side of the conductive portion of the bus bar facing the battery cell. Due to the heat-insulating barrier effect of the first insulating heat-insulating film, when thermal runaway occurs in the battery cell, its ejecta are sprayed onto the first insulating heat-insulating film, thereby preventing the thermal runaway ejecta from directly connecting the battery cell and the bus bar to cause a short circuit, and preventing high temperature from spreading to the bus bar, thereby improving the safety and reliability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an exploded schematic diagram of a bus unit and a battery cell provided in a specific embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of a battery cell provided in a specific embodiment of the utility model;

[0023] Figure 3 It is an exploded schematic diagram of a bus unit provided in a specific embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of a bus provided by a specific embodiment of the utility model;

[0025] Figure 5 This is a first connection diagram of a bus unit and a battery cell provided in a specific embodiment of the utility model;

[0026] Figure 6 It is a second connection diagram of the bus unit and the battery cell provided in a specific embodiment of the utility model;

[0027] Figure 7 It is a structural schematic diagram of a battery module provided by a specific embodiment of the utility model;

[0028] Figure 8 It is an exploded schematic diagram of a battery module provided by a specific embodiment of the utility model;

[0029] Fig. 9 It is a schematic diagram of the connection between the bus unit and the battery cell module provided in a specific embodiment of the utility model;

[0030] Fig.10 It is a structural schematic diagram of a bracket of a CCS assembly provided in a specific embodiment of the utility model.

[0031] In the figure:

[0032] 100, CCS components; 200, battery cell modules;

[0033] 110, bus unit; 120, collection unit; 1210, collection circuit board; 1220, voltage collection bar; 1230, connector; 130, bracket; 1310, contour part; 1320, bus slot;

[0034] 210, battery cell; 2110, electrode area; 2120, negative electrode area; 2130, pressure relief structure; 2140, negative end surface; 2150, cylindrical side;

[0035] 1. Busbar; 2. Insulation and heat insulation part;

[0036] 11. conductive part; 12. first connecting part; 13. second connecting part; 131. positioning hole;

[0037] 21. First insulating and heat-insulating film; 22. Second insulating and heat-insulating film; 23. Connecting film;

[0038] 211. First arcuate edge; 212. Second arcuate edge. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] like Figure 1, which is a schematic diagram of the structure of the bus unit 110 and the battery cell 210 provided in this embodiment, wherein the bus unit 110 is used to be electrically connected to the battery cell 210. Figure 2 , which is a schematic diagram of the structure of the battery cell 210. In the battery cell 210 connected to the busbar unit 110, an electrode area 2110 and a pressure relief structure 2130 are disposed at one end.

[0044] See also Figure 3 The busbar unit 110 includes a busbar 1 and an insulating and heat-insulating part 2. The busbar 1 is made of metal materials, such as aluminum, aluminum alloy, copper, copper alloy, etc., and has good electrical conductivity. The insulating and heat-insulating part 2 can be made of non-metallic materials with good insulation and heat resistance.

[0045] See also Figure 4 The busbar 1 includes a conductive portion 11 and a first connecting portion 12 connected to each other. The first connecting portion 12 is specifically arranged on one side of the conductive portion 11. The first connecting portion 12 is electrically connected to the electrode area 2110, for example, by laser welding. Figure 5 The insulating and heat-insulating part 2 includes a first insulating and heat-insulating film 21 , which is covered on the side of the conductive part 11 facing the battery cell 210 and is opposite to the pressure relief structure 2130 . The pressure relief structure 2130 is separated from the conductive part 11 by the first insulating and heat-insulating film 21 .

[0046] By arranging the first insulating heat-insulating film 21 on the side of the conductive portion 11 of the bus 1 facing the battery cell 210, due to the heat-insulating barrier effect of the first insulating heat-insulating film 21, when the battery cell 210 has a thermal runaway, its ejecta are sprayed onto the first insulating heat-insulating film 21, thereby preventing the thermal runaway ejecta from directly connecting the battery cell 210 and the bus 1 to cause a short circuit, and preventing high temperature from spreading to the bus 1, thereby improving the safety and reliability of the battery pack.

[0047] Exemplarily, the electrode region 2110 is the positive electrode region or the negative electrode region 2120 of the battery cell 210. For some battery cells 210, only the positive electrode region and the pressure relief structure 2130 are provided at one end, or only the negative electrode region 2120 and the pressure relief structure 2130 are provided. For other battery cells 210, one end has the positive electrode region, the negative electrode region 2120 and the pressure relief structure 2130 at the same time. If the first connecting portion 12 of the bus 1 is connected to the positive electrode region, the first insulating thermal insulation film 21 isolates the negative electrode region 2120 from the conductive portion 11, and isolates the pressure relief structure 2130 from the conductive portion 11. If the first connecting portion 12 of the bus 1 is connected to the negative electrode region 2120, the first insulating thermal insulation film 21 isolates the positive electrode region from the conductive portion 11, and isolates the pressure relief structure 2130 from the conductive portion 11. This can avoid the positive electrode region and the negative electrode region 2120 being electrically connected to the bus 1 at the same time to cause a short circuit, and can also isolate the high-temperature ejected material ejected from the pressure relief structure 2130.

[0048] Take the battery cell 210 as an example, for example, a cylindrical battery cell with a model number of 21700, see Figure 2 , which has two end faces and a cylindrical side surface 2150 between the two end faces. One of the end faces is provided with a pole and a pressure relief structure 2130, the pole is the positive electrode area of ​​the battery cell 210, and the area arranged outside the pole is the negative electrode area 2120; the other end face is the negative electrode, which is defined as the negative end face 2140. The cylindrical side surface 2150 of the battery cell 210 is also the negative electrode. When the bus unit provided in this embodiment is connected to the cylindrical battery cell, the first insulating and heat-insulating film 21 provided on the bus 1 can not only isolate the high-temperature thermal runaway ejecta ejected through the pressure relief structure 2130, but also isolate the positive electrode area and the negative electrode area 2120, to prevent the positive and negative electrodes from being connected to the bus 1 at the same time and short-circuiting.

[0049] Alternatively, see Figure 1 and Figure 6 The insulating and heat-insulating part 2 further includes a second insulating and heat-insulating film 22, which is covered on the side of the conductive part 11 facing away from the battery cell 210. The second insulating and heat-insulating film 22 can isolate and block the thermal runaway ejection of the battery cell 210 from reaching the side of the conductive part 11 facing away from the battery cell 210, preventing the battery cell 210 from being directly electrically connected to the back of the bus 1 through the conductive thermal runaway ejection, avoiding a short circuit, and preventing the thermal runaway high temperature from spreading to the bus 1.

[0050] Further, see Figure 5 The insulating and heat-insulating part 2 also includes a connecting film 23, and the first insulating and heat-insulating film 21 and the second insulating and heat-insulating film 22 on both sides of the conductive part 11 are connected by the connecting film 23, and the connecting film 23 is covered on the side edge of the conductive part 11. That is, the insulating and heat-insulating part 2 completely covers the two side surfaces and edges of the conductive part 11, and prevents the thermal runaway ejection from being directly connected to the bus 1 in all directions, and prevents the high temperature generated by the thermal runaway ejection from spreading to the bus 1, avoiding excessive temperature rise of the bus 1, and improving the operating safety and reliability of the battery pack.

[0051] In some embodiments, the first insulating heat-insulating film 21 and / or the second insulating heat-insulating film 22 and / or the connecting film 23 are bonded to the conductive part 11, and the connection is firm, convenient and relatively reliable. In this embodiment, the first insulating heat-insulating film 21, the second insulating heat-insulating film 22 and the connecting film 23 are all bonded to the conductive part 11. For example, adhesive is provided on the first insulating heat-insulating film 21, the second insulating heat-insulating film 22 and the connecting film 23. After the entire insulating heat-insulating part 2 is bonded to the conductive part 11 of the bus 1, a hot pressing process is used to melt the adhesive on the insulating heat-insulating part 2 by high temperature, so that the insulating heat-insulating part 2 and the conductive part 11 of the bus 1 are firmly bonded together.

[0052] The first insulating heat-insulating film 21 and / or the second insulating heat-insulating film 22 and / or the connecting film 23 are PI films or mica paper films. Exemplarily, the first insulating heat-insulating film 21, the second insulating heat-insulating film 22 and the connecting film 23 are all PI films, that is, the entire insulating heat-insulating portion 2 is made of PI films, and the PI films have excellent high temperature resistance and electrical insulation properties, and can effectively prevent the positive electrode region and the negative electrode region 2120 from being electrically connected to the bus 1 at the same time, and effectively isolate thermal runaway ejections. Alternatively, the first insulating heat-insulating film 21, the second insulating heat-insulating film 22 and the connecting film 23 are all mica paper, that is, the entire insulating heat-insulating portion 2 is made of mica paper, and the mica paper can be used in an environment of 500 degrees Celsius, effectively isolate thermal runaway ejections, and prevent high temperature diffusion, and the mica paper has good insulation properties, and can isolate the negative electrode region 2120 from the conductive portion 11, or isolate the positive electrode region from the conductive portion 11.

[0053] In some embodiments, the thickness of the first insulating heat-insulating film 21 and / or the second insulating heat-insulating film 22 and / or the connecting film 23 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm. Furthermore, the thickness of the first insulating heat-insulating film 21 and / or the second insulating heat-insulating film 22 and / or the connecting film 23 can be in the range of greater than or equal to 0.1 mm and less than or equal to 0.3 mm. The insulating heat-insulating portion 2 of this thickness can ensure effective isolation between the negative electrode region 2120 (or the positive electrode region) and the conductive portion 11, preventing it from being too thin and being broken down and damaged by the injection pressure of the thermal runaway ejecta of the battery cell 210, while not being too thick to increase the material cost. For example, the first connecting portion 12 is connected to the positive electrode area. For some types of cylindrical battery cells, the positive electrode area and the negative electrode area 2120 are in the same plane. If the first insulating thermal insulation film 21 is set too thick, the first insulating thermal insulation film 21 is clamped between the negative electrode area 2120 and the conductive portion 11, resulting in a gap between the first connecting portion 12 and the positive electrode area, increasing the difficulty of welding.

[0054] Exemplarily, the first insulating and heat-insulating film 21 , the second insulating and heat-insulating film 22 , and the connecting film 23 have the same thickness, which may be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc.

[0055] In some embodiments, the battery cell 210 connected to the bus bar 1 is Figure 2 In the cylindrical battery cell shown, the electrode area 2110 is a positive electrode area, and the outer periphery of the positive electrode area is surrounded by a negative electrode area 2120, and the negative electrode area 2120 and the positive electrode area are on the same end surface of the battery cell 210. The negative end surface 2140 of the cylindrical battery cell and the positive electrode area are arranged at both ends of the cylindrical battery cell along the axial direction of the cylindrical battery cell. Figure 4As shown, the busbar 1 further includes a second connection portion 13, and the second connection portion 13 and the first connection portion 12 are disposed on opposite sides of the conductive portion 11. The busbar 1 can connect two cylindrical cells facing opposite directions through the first connection portion 12 and the second connection portion 13. The first connection portion 12 is connected to the positive electrode region of one of the cells 210, and the second connection portion 13 is electrically connected to the negative terminal surface 2140 of the other cell 210.

[0056] The electrode area 2110 is circular. Specifically, in the above embodiment, the positive electrode area of ​​the cylindrical battery cell is circular. Figure 5 and Figure 6 , a first arcuate edge 211 is provided on one side of the first insulating thermal insulation film 21 and / or the second insulating thermal insulation film 22, and the first arcuate edge 211 is arranged around the electrode area 2110, that is, around the outside of the positive electrode area. The first arcuate edge 211 can be provided on one side of both the first insulating thermal insulation film 21 and the second insulating thermal insulation film 22, or on one of the first insulating thermal insulation film 21 and the second insulating thermal insulation film 22. The negative terminal surface 2140 is also circular, and a second arcuate edge 212 is provided on one side of the first insulating thermal insulation film 21 and / or the second insulating thermal insulation film 22 facing away from the first connecting portion 12, and the second arcuate edge 212 is arranged outside the negative terminal surface 2140. The second arcuate edge 212 can be provided on both the first insulating thermal insulation film 21 and the second insulating thermal insulation film 22, or on only one of the first insulating thermal insulation film 21 and the second insulating thermal insulation film 22. The shape and size of the first arcuate edge 211 are adapted to the outer contour of the positive electrode region, and the second arcuate edge 212 is adapted to the outer contour of the negative terminal 2140. By providing the first arcuate edge 211 surrounding the positive electrode region and the second arcuate edge 212 surrounding the negative terminal 2140, the first insulating heat-insulating film 21 and the second insulating heat-insulating film 22 can cover as much as possible the portion of the bus 1 that is not electrically connected to the battery cell, that is, cover the entire conductive portion 11, and protect the bus 1 from direct contact with the thermal runaway ejecta to the greatest extent possible. Figure 4 As shown, the portion indicated by the dotted line is the conductive portion 11, and the first insulating heat-insulating film 21 and the second insulating heat-insulating film 22 can be arranged within the range of the dotted line.

[0057] See also Figure 6 A busbar 1 can connect two rows of battery cells 210 with different poles. The two rows of battery cells 210 are respectively a first battery cell unit and a second battery cell unit. The first battery cell unit and the second battery cell unit both include a plurality of battery cells 210 arranged along the X direction. The first battery cell unit and the second battery cell unit are arranged along the Y direction. The axial direction of the battery cell 210 is the Z direction, wherein the X direction, the Y direction and the Z direction are perpendicular to each other.

[0058] The directions of the battery cells 210 in the first battery cell unit and the second battery cell unit are opposite. Figure 6 , the first connection part 12 and the second connection part 13 are respectively arranged on both sides of the conductive part 11 along the Y direction, wherein the first connection part 12 and the second connection part 13 are arranged in plurality along the X direction, and the plurality of first connection parts 12 correspond to the plurality of battery cells 210 of the first battery cell unit one by one, and the plurality of second connection parts 13 correspond to the plurality of battery cells 210 of the second battery cell unit one by one. The plurality of first connection parts 12 are connected to the plurality of positive electrode regions in the first battery cell unit one by one, and the negative electrode region 2120 in the first battery cell unit is isolated from the conductive part 11 by the first insulating heat-insulating film 21; the plurality of second connection parts 13 are connected to the plurality of negative terminal surfaces 2140 in the second battery cell unit one by one. The first insulating heat-insulating film 21 and the second insulating heat-insulating film 22 are both extended along the X direction to play an isolating and blocking role between the negative electrode region 2120 of each battery cell 210 and the bus 1, and to play an isolating and blocking role for the thermal runaway ejection of each battery cell 210.

[0059] The first connection part 12 is convexly arranged on one side of the conductive part 11, and is nearly circular and matches the shape and size of the positive electrode area. A groove is formed between two adjacent first connection parts 12, and the bottom wall of the groove is the side edge of the conductive part 11, and this position is covered with a connection film 23. Further, both ends of the first insulating and heat-insulating film 21 along the X direction are connected to the second insulating and heat-insulating film 22 through the connection film 23 to cover both sides of the conductive part 11 along the X direction.

[0060] See also Figure 4 A positioning hole 131 is provided in the middle of the second connecting portion 13. During the welding process between the second connecting portion 13 and the negative terminal surface 2140 of the battery cell 210 to achieve conductive connection, the positioning hole 131 is used for welding identification to ensure that the welding path is on the designed track.

[0061] like Figure 7 and Figure 8 As shown, this embodiment also provides a battery module, including a cell module 200 and a CCS assembly 100, the cell module 200 includes a plurality of cells 210, and the CCS assembly 100 is located on one side of the plurality of cells 210, and is used to electrically connect the plurality of cells 210. The CCS assembly 100 includes a bracket 130, a collection unit 120, and a bus unit 110 as described above. The bus unit 110 and the collection unit 120 are both mounted on the bracket 130, and the collection unit 120 is electrically connected to the bus 1, and is used to collect voltage and temperature signals of the cell module 200.

[0062] The bracket 130 is provided with a profiling portion 1310 adapted to the battery cell 210, and the battery cell 210 cooperates with the profiling portion 1310 to locate and fix the position of the battery cell 210. The bracket 130 serves as both an installation carrier for the bus unit 110 and the collection unit 120 and a carrier for the battery cell module 200, which simplifies the structure of the battery module, greatly improves production efficiency, and greatly reduces the material cost of the battery module. Exemplarily, the profiling portion 1310 is a profiling hole, and when arranging the battery cell 210, the battery cell 210 can be placed in the profiling hole.

[0063] The battery cell module 200 of this embodiment includes multiple groups of first battery cell units and multiple groups of second battery cell units. For example, see Figure 8 and Fig. 9 , along the X direction, at least one first battery cell unit and at least one second battery cell unit are arranged, and the first battery cell unit and the second battery cell unit are arranged alternately in sequence; along the Y direction, at least one first battery cell unit and at least one second battery cell unit are arranged, and the first battery cell unit and the second battery cell unit are arranged alternately in sequence, so that the multiple battery cells 210 in the battery cell module 200 are connected in parallel first and then in series. Fig. 9 , which is a schematic diagram of using a plurality of busbar units 110 to connect a plurality of first battery cell units and a plurality of second battery cell units in a battery cell module 200 .

[0064] Since the poles in the first battery cell unit and the second battery cell unit are oriented in opposite directions, a CCS assembly 100 is provided on both sides of the battery cell module 200 along the Z direction, and the brackets 130 of the two CCS assemblies 100 are provided with contoured portions 1310 corresponding to the multiple battery cells 210 one by one. During the stacking process, the battery cells 210 only need to be arranged according to the contoured portions 1310 on the brackets 130 of the CCS assemblies 100 to complete the stacking of the battery cell modules 200.

[0065] See also Figure 7 and Figure 8 The acquisition unit 120 includes an acquisition circuit board 1210, a voltage acquisition bar 1220, and a connector 1230. The acquisition circuit board 1210 is exemplarily an FPC flexible circuit board, on which a plurality of voltage acquisition bars 1220 are connected. The voltage acquisition bars 1220 are electrically connected to the bus 1 to collect voltage signals. The connector 1230 is electrically connected to one end of the acquisition circuit board 1210 as a data acquisition output interface.

[0066] See also Fig.10 A bus card slot 1320 is provided on the side of the bracket 130 facing away from the battery cell 210. The bus card slot 1320 is used to install the bus unit 110. The shape and size of the bus card slot 1320 are compatible with the shape and size of the bus 1, and play a role in positioning and fixing the bus unit 110.

[0067] If the busbar 1 is only connected to the negative terminal surface 2140 and not connected to the positive electrode area, there is no need to provide the insulating and heat-insulating part 2. Figure 7 The negative output stage busbar 1 is shown in the lower left corner. If the busbar 1 is only connected to the positive region and not to the negative terminal surface 2140, the second connecting portion 13 is not required, and the first insulating heat-insulating film 21 and the second insulating heat-insulating film 22 can be set as a straight edge on the side facing away from the first arc-shaped edge 211, such as Figure 7 The positive output stage bus 1 is shown in the lower right corner.

[0068] like Figure 7 The top busbar 1 is a long busbar 1 in series, which connects a first battery cell unit and a second battery cell unit arranged along the X direction. Accordingly, a row of first connecting parts 12 and a row of second connecting parts 13 are arranged on the busbar 1. The row of first connecting parts 12 and the row of second connecting parts 13 are arranged along the X direction. A row of first connecting parts 12 connects the positive electrode area of ​​the first battery cell unit, and a row of second connecting parts 13 connects the negative electrode area 2120 of the second battery cell unit. On the long busbar 1 in series, only the insulating and heat-isolating part 2 is provided in the corresponding area facing the first battery cell unit, and the insulating and heat-isolating part 2 does not need to be provided in the area facing the second battery cell unit.

[0069] This embodiment also provides a battery pack, including a box and at least one battery module as described above, wherein the battery module is disposed in the box.

[0070] See also Figure 8 In the battery module shown, the above-mentioned CCS assembly 100 is provided on both sides of the battery module 200 along the Z direction. The Z direction is the axial direction of the battery cell 210. The Z direction is set at an angle α with the bottom plate of the battery pack box, and α is less than or equal to 15°. That is, the battery module is installed vertically, and after it is installed inside the battery pack, the angle between the axis of the battery cell 210 and the bottom plate of the box is less than or equal to 15°. Exemplarily, the angle between the axis of the battery cell 210 and the bottom plate of the box is 0° (the two are parallel at this time), 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, etc.

[0071] Since the brackets 130 of the CCS assemblies 100 on both sides are provided with profiling portions 1310 (exemplified as profiling holes in this embodiment), the brackets 130 of the CCS assemblies 100 on both sides can directly support the battery cells 210 laterally without using a tray to limit the multiple battery cells 210, which can reduce the use of parts in the battery module assembly process, simplify the battery module assembly process, and reduce the size of the battery module along the Z direction, making the battery module structure more compact, reducing the occupied space, and improving the energy density.

[0072] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A busbar unit, used for electrically connecting to a battery cell (210), wherein one end of the battery cell (210) is provided with an electrode area (2110) and a pressure relief structure (2130), characterized in that: The busbar unit comprises: A busbar (1) comprising a connected conductive portion (11) and a first connecting portion (12), wherein the first connecting portion (12) is electrically connected to the electrode region (2110); The insulating and heat-insulating part (2) comprises a first insulating and heat-insulating film (21), wherein the first insulating and heat-insulating film (21) is covered on a side of the conductive part (11) facing the battery core (210) and opposite to the pressure relief structure (2130), and the pressure relief structure (2130) is separated from the conductive part (11) by the first insulating and heat-insulating film (21).

2. The busbar unit according to claim 1, characterized in that: The insulating and heat-insulating portion (2) further comprises a second insulating and heat-insulating film (22), wherein the second insulating and heat-insulating film (22) is covered on a side of the conductive portion (11) facing away from the battery core (210).

3. The busbar unit according to claim 2, characterized in that: The insulating and heat-insulating part (2) further comprises a connecting film (23), the first insulating and heat-insulating film (21) and the second insulating and heat-insulating film (22) are connected via the connecting film (23), and the connecting film (23) is covered on the side edge of the conductive part (11).

4. The busbar unit according to claim 3, characterized in that: The first insulating and heat-insulating film (21) and / or the second insulating and heat-insulating film (22) and / or the connecting film (23) are bonded to the conductive part (11).

5. The busbar unit according to claim 3, characterized in that: The first insulating and heat-insulating film (21) and / or the second insulating and heat-insulating film (22) and / or the connecting film (23) are PI films or mica paper films.

6. The busbar unit according to claim 3, characterized in that: The thickness of the first insulating and heat-insulating film (21) and / or the second insulating and heat-insulating film (22) and / or the connecting film (23) is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

7. The busbar unit according to claim 2, characterized in that: The electrode area (2110) is circular, and a first arcuate edge (211) is provided on one side of the first insulating heat-insulating film (21) and / or the second insulating heat-insulating film (22), and the first arcuate edge (211) surrounds the electrode area (2110). 8.CCS component, characterized in that, It comprises a bracket (130) and a bus unit according to any one of claims 1 to 7, wherein the bus unit is mounted on the bracket (130).

9. A battery module, characterized in that: It comprises a battery cell module (200) and the CCS assembly as claimed in claim 8, wherein the battery cell module (200) comprises a plurality of the battery cells (210), and the CCS assembly (100) electrically connects the plurality of the battery cells (210).

10. A battery pack, characterized in that: comprising a box and at least one battery module as claimed in claim 9, wherein the battery module is installed in the box; The CCS components (100) are arranged on both sides of the battery cell module (200) along the Z direction, and the Z direction is arranged at an angle α with the bottom plate of the box body, and α is less than or equal to 15°; a profiling portion (1310) adapted to the battery cell (210) is arranged on the bracket (130) of each CCS component (100), and the battery cell (210) cooperates with the profiling portion (1310).

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