An integrated busbar and battery module

Abstract

The utility model discloses an integrated busbar, along vertical direction, integrated busbar is divided into the first area of downside and the second area of upside, the first area includes at least one electrically conductive group, and electrically conductive group is fixedly connected with integrated busbar, the second area includes at least one gas guiding assembly, and gas guiding assembly includes first side wall, second side wall, third side wall and bottom wall, and first side wall, second side wall and third side wall constitute the exhaust passage extending upwards along vertical direction, and the side end surface of first side wall, the side end surface of second side wall and the side end surface of bottom wall constitute the air inlet, and the top end surface of first side wall, the top end surface of second side wall and the top end surface of third side wall constitute the exhaust port upwards along vertical direction, and the exhaust port and air inlet are communicated with exhaust passage respectively, and first side wall, second side wall, third side wall and bottom wall are provided with high temperature resistant material, the utility model discloses can export high temperature gas through gas guiding assembly when the heat run away of electric core, avoid the thermal erosion flexible circuit board, prevent the signal loss of flexible circuit board due to high temperature. The utility model discloses further provides a kind of battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery thermal safety technology, and in particular to an integrated busbar and battery module. Background Technology

[0002] With the rapid development of new energy vehicle technology, CTB (Cell to Body) battery technology has been widely used due to its significant improvement in vehicle space utilization and energy density. The internal space layout of battery packs is becoming increasingly compact, and the integration of battery modules is becoming higher and higher. As a key component of the battery module, the integrated busbar connects the battery cells in series via conductive busbars to achieve high-voltage output, and also collects the voltage and temperature signals of each battery cell through a flexible circuit board.

[0003] In current battery designs, the close arrangement of flexible circuit boards and conductors means that for cells where the explosion-proof valve is located on the same side as the cell terminal, the flexible circuit board inevitably covers the explosion-proof valve. When a cell experiences thermal runaway, the explosion-proof valve opens instantly, ejecting a high-temperature, high-speed gas-liquid mixture and potential open flame. These ejected materials directly impact and burn the flexible circuit board, causing a momentary interruption of voltage and temperature sampling signals. This signal loss severely affects the battery management system's accurate judgment and timely warning of thermal runaway events, increasing the difficulty of vehicle fault diagnosis and control strategy formulation, and potentially leading to safety hazards due to false alarms or missed alarms. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in battery modules, flexible circuit boards can cover the cell's explosion-proof valve. When a cell experiences thermal runaway, the high-temperature gas emitted from the explosion-proof valve can burn the flexible circuit board, causing a momentary interruption of the sampling signal and affecting the vehicle's judgment of thermal runaway conditions. This invention provides a battery module in which a gas guiding component, through the laying of high-temperature resistant materials and an upward-opening structure, achieves directional discharge of high-temperature gas. This ensures that the vehicle can maintain low-pressure signal transmission for a certain period of time under thermal runaway conditions, and also avoids misjudgments caused by low-pressure signal loss due to non-thermal runaway, thereby improving the accuracy of the vehicle's thermal runaway alarm.

[0005] To solve the above-mentioned technical problems, the present invention discloses an integrated busbar; the integrated busbar is divided into a lower first region and an upper second region along the vertical direction; the first region includes at least one conductive group, which is fixedly connected to the integrated busbar; the second region includes at least one gas guiding component, which includes a first sidewall, a second sidewall, a third sidewall, and a bottom wall, the first sidewall, the second sidewall, and the third sidewall forming an exhaust channel extending upward along the vertical direction; the side end faces of the first sidewall, the second sidewall, and the bottom wall form an air inlet, and the top faces of the first sidewall, the second sidewall, and the third sidewall form an exhaust outlet extending upward along the vertical direction, the exhaust outlet and the air inlet respectively communicating with the exhaust channel; the first sidewall, the second sidewall, the third sidewall, and the bottom wall are provided with a high-temperature resistant material.

[0006] Using the above technical solution, when thermal runaway occurs in the battery cell, the explosion-proof valve will eject high-temperature gas. This gas first enters the first air inlet formed by the side end faces of the first sidewall, the second sidewall, and the first bottom wall. Subsequently, the high-temperature gas passes through the first exhaust channel formed by the first, second, and third sidewalls. Since the first exhaust channel extends vertically, the gas changes its original direction in the first exhaust channel and is discharged into the first exhaust port formed by the top faces of the first, second, and third sidewalls. The exhaust channel, composed of the first, second, and third sidewalls, and the air inlet, composed of the side end faces of the first, second, and bottom walls, form a vertical channel that allows air to enter from the side end face and exit from the top face. This changes the path of the high-temperature gas ejected from the cell explosion-proof valve upward, keeping the high-temperature gas away from the flexible circuit board located behind the third sidewall. At the same time, the use of high-temperature resistant materials can prolong the time that the gas guiding component can maintain its structural integrity under high-temperature impact, thereby delaying signal loss caused by high-temperature damage to the flexible circuit board.

[0007] According to another specific embodiment of the present invention, the first sidewall, the second sidewall and the third sidewall are arranged in a vertical direction, the first sidewall and the second sidewall are located on both sides of the third sidewall, and the bottom wall is located between the first sidewall and the second sidewall.

[0008] By adopting the above technical solution, the first and second sidewalls are located on both sides of the third sidewall, and the bottom wall is located between the first and second sidewalls, forming a channel structure with openings at the bottom and top on three sides. This ensures that the high-temperature gas entering from the side end face can only flow vertically along the channel and exit from the top.

[0009] According to another specific embodiment of the present invention, a plurality of gas guiding components are arranged and extended sequentially along a first direction, and adjacent gas guiding components share the second sidewall.

[0010] By adopting the above technical solution, the thickness of one sidewall can be reduced when multiple gas guiding components are arranged by sharing the extension of the second sidewall. This allows each cell to be configured with an independent gas guiding channel in a limited space, and the shared second sidewall can be used as an isolation wall to prevent high-temperature gas from diffusing between adjacent channels.

[0011] According to another specific embodiment of the present invention, the integrated busbar includes a flexible circuit board, which is disposed on the rear side of the third sidewall of the gas guiding assembly along a second direction, and the flexible circuit board extends along the first direction.

[0012] By adopting the above technical solution, the flexible circuit board can be placed on the rear side of the third sidewall of the gas guiding component and extended along the first direction. The third sidewall acts as a barrier to isolate the high-temperature gas from the flexible circuit board, preventing the high-temperature gas from directly contacting the flexible circuit board, thereby protecting the signal acquisition circuit of the flexible circuit board.

[0013] According to another specific embodiment of the present invention, the first conductive group includes a first conductive busbar, and the second conductive group includes a second conductive busbar and a third conductive busbar, wherein the second conductive busbar and the third conductive busbar are fixedly connected.

[0014] By adopting the above technical solution, the first conductive bus, the second conductive bus and the third conductive bus can be connected to the conductive electrode post to realize the series connection between different cells and form the circuit of the battery module.

[0015] According to another specific embodiment of the present invention, the integrated busbar further includes a power transmission port, which is disposed at one end of the first region and is electrically connected to the first conductive group.

[0016] By adopting the above technical solution, a centralized external power interface is provided for the battery module, so that the total current generated by multiple cells connected in series can be output to the outside through the power transmission port.

[0017] An embodiment of the present invention also discloses a battery module, including a battery pack and an integrated busbar as described in any of the foregoing embodiments. The battery pack includes at least one battery cell. One end of the battery cell is provided with an explosion-proof valve and a first conductive electrode post. The explosion-proof valve is located above the first conductive electrode post in the vertical direction. The other end of the battery cell is provided with a second conductive electrode post. A first conductive group is connected to the first conductive electrode post, and a second conductive group is connected to the second conductive electrode post. The third sidewall of the gas guiding assembly faces the explosion-proof valve, and the first and second sidewalls of the gas guiding assembly are attached to the battery cell.

[0018] Using the above technical solution, the first conductive group can be connected to the first conductive electrode post of the battery cell, and the second conductive group can be connected to the second conductive electrode post, so as to realize the series connection of different battery cells; at the same time, by facing the third side wall of the gas guiding component of the integrated busbar towards the explosion-proof valve of the battery cell, the high-temperature gas ejected by the explosion-proof valve is directed towards the air inlet, so that the high-temperature gas enters the gas guiding component and is guided into the vertical exhaust channel, thereby realizing the directional flow of gas.

[0019] According to another specific embodiment of the present invention, the battery cells are arranged and extend sequentially along a first direction, with adjacent battery cells facing opposite directions.

[0020] By adopting the above technical solution, the battery cells can be arranged sequentially along the first direction and facing opposite directions, so that the first and second conductive electrode posts are alternately aligned with the conductive group of the integrated busbar, making the overall layout and electrical connection path of the battery module more compact and improving the space utilization of the battery module.

[0021] According to another specific embodiment of the present invention, integrated busbars are provided on both sides of the battery pack.

[0022] By adopting the above technical solution, by setting integrated busbars on both sides of the battery pack, simultaneously managing the electrical connection of the conductive electrode posts of the two rows of cells, and providing gas guiding function for the explosion-proof valves of the two rows of cells, the battery module structure becomes more compact and has a higher degree of functional integration.

[0023] According to another specific embodiment of the present invention, there is a gap between the third sidewall and the explosion-proof valve, and the length of the gap is greater than 3.5 mm.

[0024] By adopting the above technical solution, by setting the gap between the third sidewall of the gas guiding component and the explosion-proof valve to be greater than 3.5mm, sufficient space is provided to ensure that the explosion-proof valve can open normally in the event of thermal runaway without being interfered with by the gas guiding component, while allowing high-temperature gas to smoothly enter the inlet and exit from the exhaust port. Attached Figure Description

[0025] Figure 1This diagram shows the structural schematic of the battery module in an embodiment of the present invention;

[0026] Figure 2 This shows a top view of the battery module in an embodiment of the present invention;

[0027] Figure 3 An exploded view of the battery module in an embodiment of this utility model is shown;

[0028] Figure 4 The left view of the integrated busbar in an embodiment of this utility model is shown;

[0029] Figure 5 The image shows a right view of the integrated busbar in an embodiment of this utility model;

[0030] Figure 6 An exploded view of the gas guiding component in an embodiment of this utility model is shown;

[0031] Figure 7 This diagram shows a schematic representation of the battery pack in an embodiment of the present invention.

[0032] Figure 8 This shows a right view of the battery pack in an embodiment of the present invention;

[0033] Figure 9 The left view of the battery pack in an embodiment of this utility model is shown.

[0034] Icons: 1-Battery module; 10-First integrated busbar; 11-First region; 110-First conductive group; 111-First conductive busbar; 112-Second conductive group; 113-Second conductive busbar; 114-Third conductive busbar; 115-First voltage sampler; 116-Power transmission port; 12-Second region; 120-First gas guiding assembly; 121-First sidewall; 122-Side end face of the first sidewall; 123-Top face of the first sidewall ; 124-Second sidewall; 125-Side end face of the second sidewall; 126-Top face of the second sidewall; 127-First bottom wall; 128-Side end face of the first bottom wall; 129-Third sidewall; 130-Top face of the third sidewall; 131-First exhaust channel; 132-First air inlet; 133-First exhaust outlet; 134-First high-temperature resistant material; 135-First flexible circuit board; 136-First temperature sampler; 137-First gap;

[0035] 20-Second integrated busbar; 21-Third region; 210-Third conductive group; 211-Fourth conductive busbar; 212-Fifth conductive busbar; 213-Second voltage sampler; 22-Fourth region; 220-Second gas guiding assembly; 221-Fourth sidewall; 222-Side end face of the fourth sidewall; 223-Top face of the fourth sidewall; 224-Fifth sidewall; 225-Side end face of the fifth sidewall; 226-Top face of the fifth sidewall; 227-Second bottom wall; 228-Side end face of the second bottom wall; 229-Sixth sidewall; 230-Top face of the sixth sidewall; 231-Second exhaust channel; 232-Second air inlet; 233-Second exhaust outlet; 234-Second high-temperature resistant material; 235-Second flexible circuit board; 236-Second temperature sampler; 237-Second gap;

[0036] 30-Battery pack; 31-Battery cell; 32-Explosion-proof valve; 33-First conductive electrode post; 34-Second conductive electrode post; 35-Groove; 36-Temperature monitor; 37-QR code. Detailed Implementation

[0037] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0038] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this embodiment, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0040] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0041] In the description of this embodiment, it should also be noted that, for ease of description, the integrated busbar on the right side of the battery pack is referred to as the "first integrated busbar 10," and the integrated busbar on the left side of the battery pack is referred to as the "second integrated busbar 20." It should be understood that this designation of "first" and "second" is merely to distinguish between two integrated busbars with different installation positions when describing this specific embodiment, and does not imply any essential difference in their functions or core structures. Both possess all the features of an "integrated busbar" as defined in the claims of this application, namely, including at least one conductive group and a gas guiding component, etc.

[0042] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0044] refer to Figures 1 to 5 This application provides a battery module 1, including a battery pack 30 and an integrated busbar, which is placed on both sides of the battery pack 30. In this embodiment, the integrated busbar includes a first integrated busbar 10 and a second integrated busbar 20. The first integrated busbar 10 and the second integrated busbar 20 have the same structure. For ease of understanding, the following description uses the first integrated busbar 10 as an example. (Reference) Figure 4 and Figure 5Along the vertical direction, the first integrated busbar 10 is divided into a lower first region 11 and an upper second region 12. The first region 11 includes a first conductive group 110 and at least one second conductive group 112, which are fixedly connected to the first integrated busbar 10. The second region 12 includes at least one first gas guiding assembly 120. The first gas guiding assembly 120 includes a first sidewall 121, a second sidewall 124, a third sidewall 129, and a first bottom wall 127. The first sidewall 121, the second sidewall 124, and the third sidewall 129 form a first exhaust channel 131 extending vertically upward. The side end faces 122 of the first sidewall, 125 of the second sidewall, and 128 of the first bottom wall form a first air inlet 132. The top end faces 123 of the first sidewall, 126 of the second sidewall, and 130 of the third sidewall form a first exhaust port 133 extending vertically upward. The first exhaust port 133 and the first air inlet 132 are respectively connected to the first exhaust channel 131. The first sidewall 121, the second sidewall 124, the third sidewall 129, and the first bottom wall 127 are provided with a first high-temperature resistant material 134.

[0045] It should be noted that there are 19 first gas guiding components 120 in this embodiment, and no specific limit is made here.

[0046] It should be noted that the first high-temperature resistant material 134 can be made of Teflon, ceramic fiber cloth, etc., and no specific limitation is made here.

[0047] refer to Figure 4 and Figure 5This application mainly divides the integrated busbar into two structural regions: the lower region 11 is responsible for electrical connection and power transmission, and the upper region 12 is responsible for signal acquisition and thermal runaway protection. When the battery cell 31 experiences thermal runaway, the explosion-proof valve 32 will eject high-temperature gas. This gas first enters the first air inlet 132, which is formed by the side end face 122 of the first sidewall, the side end face 125 of the second sidewall, and the side end face 128 of the first bottom wall. Subsequently, the high-temperature gas passes through the first exhaust channel 131, which is formed by the first sidewall 121, the second sidewall 124, and the third sidewall 129. Since the first exhaust channel 131 extends vertically, the gas changes its original direction in the first exhaust channel 131 and is discharged into the first exhaust port 133, which is formed by the top surface 123 of the first sidewall, the top surface 126 of the second sidewall, and the top surface 130 of the third sidewall. Throughout the process, the first high-temperature resistant material 134 covering each wall surface directly withstands the high-temperature impact, slowing down the ablation process of the first gas guiding assembly 120 and the first flexible circuit board 135. This arrangement, through the first exhaust channel 131 composed of the first side wall 121, the second side wall 124, and the third side wall 129, and the first air inlet 132 composed of the side end face 122 of the first side wall, the side end face 125 of the second side wall, and the side end face 128 of the first bottom wall, forms a vertical channel that allows air to enter from the side end face and exit from the top face. This changes the high-temperature gas ejected from the explosion-proof valve 32 to an upward discharge path, keeping the high-temperature gas away from the first flexible circuit board 135 located behind the third side wall 129. At the same time, the first high-temperature resistant material 134 can prolong the time that the first gas guiding assembly 120 maintains structural integrity under high-temperature impact, thereby delaying the signal loss caused by high-temperature damage to the first flexible circuit board 135.

[0048] In some possible implementations, refer to Figure 6 The first sidewall 121, the second sidewall 124, and the third sidewall 129 are arranged vertically, with the first sidewall 121 and the second sidewall 124 located on either side of the third sidewall 129, and the first bottom wall 127 located between the first sidewall 121 and the second sidewall 124. This arrangement, with the first sidewall 121 and the second sidewall 124 on either side of the third sidewall 129 and the first bottom wall 127 located between the first sidewall 121 and the second sidewall 124, together form a channel structure with openings at the bottom and top on three sides. This ensures that high-temperature gas entering from the side end can only flow vertically along this channel and exit from the top.

[0049] Further, refer to Figure 4 Multiple first gas guiding components 120 along a first direction ( Figure 4(As shown in the X direction) The first gas guiding components 120 are arranged sequentially and extend, with adjacent first gas guiding components 120 sharing a second sidewall 124. This arrangement reduces the thickness of one sidewall when multiple first gas guiding components 120 are arranged, thereby configuring an independent gas guiding channel for each cell 31 within a limited space, and using the shared second sidewall 124 as an isolation wall to prevent high-temperature gas from diffusing between adjacent channels.

[0050] In some possible implementations, refer to Figure 5 The first integrated busbar 10 includes a first flexible circuit board 135. The first flexible circuit board 135 is along a second direction ( Figure 5 As shown in the Y direction, the first flexible circuit board 135 is positioned behind the third sidewall 129 of the first gas guiding assembly 120, and extends along the first direction. This arrangement, placing the first flexible circuit board 135 behind the third sidewall 129 of the first gas guiding assembly 120, allows the third sidewall 129 to act as a shield, isolating the high-temperature gas from the first flexible circuit board 135, preventing direct contact between the high-temperature gas and the first flexible circuit board 135, thereby protecting the signal acquisition lines of the first flexible circuit board 135.

[0051] For example, refer to Figure 5 The first conductive group 110 includes a first conductive bus 111, and the second conductive group 112 includes a second conductive bus 113 and a third conductive bus 114, which are fixedly connected. This arrangement, through the connection of the first conductive bus 111, the second conductive bus 113, and the third conductive bus 114 with the first conductive electrode post 33 and the second conductive electrode post 34, enables series connection between different battery cells 31, forming the circuit of the battery module 1.

[0052] For example, the first integrated busbar 10 also includes a power transmission port 116. (See reference...) Figure 4 and Figure 5 A power transmission port 116 is located at one end of the first region 11 and is electrically connected to the first conductive group 110. This arrangement provides a centralized external power interface for the battery module 1, allowing the total current generated by multiple cells 31 connected in series to be output to the outside through the power transmission port 116.

[0053] In some possible implementations, the first integrated busbar 10 further includes a first voltage sampler 115 and a first temperature sampler 136. (See reference...) Figure 4 and Figure 5Both the first conductive group 110 and the second conductive group 112 include a first voltage sampler 115, which is disposed on the upper side of each conductive group in the vertical direction. A first temperature sampler 136 is disposed between the first sidewall 121 and the second sidewall 124 in the first gas guiding assembly 120. This arrangement simplifies the wiring layout by placing the first voltage sampler 115 on the upper side of each conductive group, allowing it to be connected to the corresponding conductive busbar via the shortest possible wire path. Simultaneously, the first temperature sampler 136 is disposed in the gas channel between the first sidewall 121 and the second sidewall 124 to monitor the temperature of the first integrated busbar 10.

[0054] In some possible implementations, the battery pack 30 includes at least one battery cell 31. (See reference...) Figures 7 to 9 One end of the battery cell 31 is provided with an explosion-proof valve 32 and a first conductive electrode post 33. The explosion-proof valve 32 is located above the first conductive electrode post 33 in the vertical direction. The other end of the battery cell 31 is provided with a second conductive electrode post 34. A first conductive group 110 is connected to the first conductive electrode post 33 of the battery cell 31, and a second conductive group 112 is connected to the second conductive electrode post 34 of the battery cell 31. It should be noted that the first conductive bar 111 of the first conductive group 110 and the third conductive bar 114 of the second conductive group 112 are connected to the first conductive electrode post 33 of different battery cells 31, and the second conductive bar of the second conductive group 112 is connected to the second conductive electrode post 34 of the battery cell 31. The third sidewall 129 of the first gas guiding assembly 120 faces the explosion-proof valve 32, and the first sidewall 121 and the second sidewall 124 of the first gas guiding assembly 120 are attached to the battery cell 31. This configuration connects the first conductive electrode post 33 of the battery cell 31 via the first conductive group 110 and the second conductive electrode post 34 of the battery cell 31 via the second conductive group 112, thereby achieving series connection of different battery cells 31. Simultaneously, the third sidewall 129 of the first gas guiding assembly 120 of the first integrated busbar 10 is oriented towards the explosion-proof valve 32 of the battery cell 31, ensuring that the high-temperature gas emitted by the explosion-proof valve 32 is directly facing the first air inlet 132. This allows the high-temperature gas to enter the first gas guiding assembly 120 and be guided into the vertical first exhaust channel 131, achieving directional gas flow.

[0055] It should be noted that the battery pack in this embodiment has a total of 19 cells, but this is not a limitation.

[0056] For example, refer to Figures 7 to 9The battery cells 31 are arranged sequentially along the first direction, with adjacent cells 31 facing opposite directions. This arrangement, with the cells 31 arranged sequentially along the first direction and facing opposite directions, allows the first conductive electrode post 33 and the second conductive electrode post 34 of the cells 31 to alternately align with the first conductive group 110 and the second conductive group 112 of the first integrated busbar 10 and the second integrated busbar 20. This makes the overall layout and electrical connection path of the battery module 1 more compact and improves the space utilization of the battery module 1.

[0057] For example, refer to Figure 3 The battery pack 30 has a first integrated busbar 10 on both sides. This arrangement, by setting the first integrated busbar 10 on both sides of the battery pack 30, simultaneously manages the electrical connection of the first conductive electrode post 33 and the second conductive electrode post 34 of the two rows of battery cells 31, and provides gas guiding function for the explosion-proof valves 32 of the two rows of battery cells 31, makes the battery module 1 more compact in structure and more functionally integrated.

[0058] In some possible implementations, refer to Figure 2 A first gap 137 exists between the third sidewall 129 and the explosion-proof valve 32. The length of the first gap 137 is greater than 3.5 mm. For example, the selected length of the first gap 137 is 3.4 mm, 3.5 mm, 3.6 mm, 3.8 mm, or 4.0 mm. When the length of the first gap 137 is 3.4 mm or 3.5 mm, high-temperature gas rushes out from the explosion-proof valve 32 under thermal runaway. However, because the length of the first gap 137 is too short, the explosion-proof valve 32 cannot pop out normally, causing high-temperature gas to remain inside the battery cell 31, increasing the risk of battery cell combustion. When the length of the first gap 137 is 3.6 mm, 3.8 mm, or 4.0 mm, the explosion-proof valve 32 is not blocked by the third sidewall 129 and can pop out normally, so that high-temperature gas can be discharged from the explosion-proof valve 32 outside the battery cell 31. This configuration provides sufficient space to ensure that the explosion-proof valve 32 can open normally in the event of thermal runaway without being interfered with by the first gas guiding assembly 120, while allowing high-temperature gas to smoothly enter the first air inlet 132 and be discharged from the first exhaust port 133.

[0059] In some possible implementations, the second integrated busbar 20 may further include a lower third region 21 and an upper fourth region 22. (See reference) Figure 4 and Figure 5The third region 21 includes at least one third conductive group 210, which is fixedly connected to the second integrated busbar 20. The third conductive group 210 includes a fourth conductive bar 211 and a fifth conductive bar 212, which are fixedly connected. The fourth region 22 includes at least one second gas guiding assembly 220. It should be noted that there are 19 second gas guiding assemblies 220 in this embodiment, which are not specifically limited here. The second gas guiding assembly 220 includes a fourth sidewall 221, a fifth sidewall 224, a sixth sidewall 229, and a second bottom wall 227. The fourth sidewall 221, fifth sidewall 224, and sixth sidewall 229 form a second exhaust channel 231 extending upwards in the vertical direction. The side end face 222 of the fourth sidewall, the side end face 225 of the fifth sidewall, and the side end face 228 of the second bottom wall form a second air inlet 232. The top end face 223 of the fourth sidewall, the top end face 226 of the fifth sidewall, and the top end face 230 of the sixth sidewall form a second exhaust outlet 233 extending vertically upwards. The second exhaust outlet 233 and the second air inlet 232 are respectively connected to the second exhaust channel 231. The fourth sidewall 221, the fifth sidewall 224, the sixth sidewall 229, and the second bottom wall 227 are provided with a second high-temperature resistant material 234. It should be noted that in this embodiment, the fifth sidewall 224 on the second integrated busbar 20 has the same structure and function as the second sidewall 124 on the first integrated busbar 10, and both are sidewalls shared between adjacent gas guiding components. The second integrated busbar 20 also includes a second flexible circuit board 235, which is disposed along a second direction on the rear side of the sixth sidewall 229 of the second gas guiding component 220 and extends along a first direction. The second integrated busbar 20 also includes a second voltage sampler 213 and a second temperature sampler 236. The second voltage sampler 213 is disposed on the upper side of the third conductive group 210 in the vertical direction, and the second temperature sampler 236 is disposed between the fourth sidewall 221 and the fifth sidewall 224 in the second gas guiding assembly 220. The sixth sidewall 229 of the second gas guiding assembly 220 faces the explosion-proof valve 32 of the battery cell 31, and a second gap 237 is provided between the sixth sidewall 229 and the explosion-proof valve 32, wherein the length of the second gap is greater than 3.5 mm.

[0060] It should be noted that the above description of different configurations of the second integrated busbar 20 also applies to the first integrated busbar 10. That is, the number and specific arrangement of the conductive groups of the integrated busbar are adjusted according to the arrangement of the cells in the battery module. This does not deviate from the protection scope of this utility model with gas guiding components and high temperature resistant materials as the core.

[0061] In some possible implementations, refer to Figures 7 to 9A groove 35 is provided at the end of the battery cell 31 furthest from the explosion-proof valve 32. The groove 35 is located above the second conductive electrode post 34 in the vertical direction. A temperature monitor 36 and a QR code 37 are disposed in the groove 35, with the temperature monitor 36 located above the QR code 37 in the vertical direction. This arrangement, by embedding the temperature monitor 36 in the groove 35 at the end of the battery cell 31, allows the temperature monitor 36 to directly contact the surface of the battery cell 31 shell, thereby more accurately monitoring the temperature changes of the battery cell body. At the same time, placing the QR code 37 in the groove 35, making it flush with the surface of the battery cell 31, avoids wear on the surface of the QR code 37 when the battery cells 31 are stacked and assembled.

[0062] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An integrated busbar, characterized in that: Along the vertical direction, the integrated busbar is divided into a lower first region and an upper second region; The first region includes at least one conductive group, which is fixedly connected to the integrated busbar; The second region includes at least one gas guiding component, the gas guiding component including a first sidewall, a second sidewall, a third sidewall and a bottom wall, the first sidewall, the second sidewall and the third sidewall forming an exhaust channel extending upward in a vertical direction; The side end face of the first sidewall, the side end face of the second sidewall, and the side end face of the bottom wall form an air inlet, and the top surface of the first sidewall, the top surface of the second sidewall, and the top surface of the third sidewall form an exhaust outlet that extends vertically upward. The exhaust outlet and the air inlet are respectively connected to the exhaust channel. The first sidewall, second sidewall, third sidewall, and bottom wall are provided with high-temperature resistant material.

2. The integrated busbar as described in claim 1, characterized in that, The first sidewall, the second sidewall, and the third sidewall are arranged vertically, with the first sidewall and the second sidewall located on either side of the third sidewall, and the bottom wall located between the first sidewall and the second sidewall.

3. The integrated busbar as described in claim 2, characterized in that, The plurality of gas guiding components are arranged and extended sequentially along a first direction, and adjacent gas guiding components share the second sidewall.

4. The integrated busbar as described in claim 1, characterized in that, The integrated busbar includes a flexible circuit board disposed on the rear side of the third sidewall of the gas guiding assembly along a second direction, and the flexible circuit board extends along a first direction.

5. The integrated busbar as described in claim 1, characterized in that, The conductive group includes a first conductive group and a second conductive group. The first conductive group includes a first conductive busbar, and the second conductive group includes a second conductive busbar and a third conductive busbar. The second conductive busbar and the third conductive busbar are fixedly connected.

6. The integrated busbar as described in claim 5, characterized in that, The integrated busbar also includes a power transmission port, which is located at one end of the first region and is electrically connected to the first conductive group.

7. A battery module, characterized in that, The device includes a battery pack and an integrated busbar as described in any one of claims 1-6. The battery pack includes at least one battery cell. One end of the battery cell is provided with an explosion-proof valve and a first conductive electrode post. The explosion-proof valve is located above the first conductive electrode post in a vertical direction. The other end of the battery cell is provided with a second conductive electrode post. A first conductive group is connected to the first conductive electrode post of the battery cell, and a second conductive group is connected to the second conductive electrode post. The third sidewall of the gas guiding assembly faces the explosion-proof valve, and the first and second sidewalls of the gas guiding assembly are attached to the battery cell.

8. The battery module as described in claim 7, characterized in that, The battery cells are arranged sequentially along a first direction, with adjacent cells facing opposite directions.

9. The battery module as described in claim 7, characterized in that, The integrated busbars are provided on both sides of the battery pack.

10. The battery module as described in claim 7, characterized in that, There is a gap between the third sidewall and the explosion-proof valve, and the length of the gap is greater than 3.5 mm.

Images