Explosion-proof detection module and battery module

Abstract

The utility model discloses an explosion-proof detection module and a battery module, and the explosion-proof detection module comprises a chassis and a detection structure, and the chassis is suitable for being installed on the battery module; the detection structure comprises an acquisition assembly and a detection piece, and the detection piece is connected with the acquisition assembly; the acquisition assembly is mounted on the chassis, an acquisition end of the acquisition assembly is suitable for being connected with a battery cell of the battery module, and the acquisition assembly is used for acquiring working information of the battery cell; the detection part is installed on the collection assembly corresponding to the anti-explosion valve, and the detection part is used for detecting the opening state of the anti-explosion valve. According to the utility model, the acquisition piece is additionally arranged, the chassis and the acquisition plate are provided with the through holes, and the third through hole is provided with the fusing circuit, so that the out-of-control information can be detected at the first time when the thermal runaway of the battery occurs, the risks of delay, misjudgment and the like are reduced, and the safety of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery explosion-proof detection, in particular to an explosion-proof detection module and a battery module. Background Art

[0002] Electrochemical energy storage offers advantages over physical energy storage systems such as pumped hydro, flywheels, and compressed air storage, including low investment, fast construction cycles, environmental friendliness, rapid response, and high energy conversion efficiency. It is suitable for power bridging applications ranging from kilowatts to tens of megawatts. In the future, electrochemical energy storage will play a key role in smart power systems by providing auxiliary services such as wind and solar integration, peak and frequency regulation, backup power, and demand response support. In recent years, lithium batteries have been widely used in new energy vehicles, forming a complete industrial chain from raw material production to system integration capabilities and equipment manufacturing. This has laid the foundation for the application of lithium batteries in energy storage. Due to the inherently high energy content of energy storage batteries, thermal runaway is characterized by rapidity. Therefore, quickly notifying personnel of battery failures is a crucial measure to ensure battery safety.

[0003] Most existing battery systems assess the risk of cell failure by monitoring the cell's voltage and temperature. This type of testing carries numerous risks, including delays and misjudgments, and reduces the safety of the battery system. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the drawback that most existing battery systems assess the risk of cell failure by detecting the voltage and temperature signals of the cells. This detection method carries many risks such as delays and misjudgments, and results in a low safety level for the battery system.

[0005] To this end, the present invention provides an explosion-proof detection module, comprising:

[0006] a chassis, the chassis being suitable for being mounted on the battery module;

[0007] A detection structure, the detection structure comprising a collection component and a detection member, the detection member being connected to the collection component; the collection component being mounted on the chassis, the collection end of the collection component being adapted to be connected to the battery cell of the battery module, the collection component being used to collect operating information of the battery cell;

[0008] The detection component is installed on the collection component corresponding to the explosion-proof valve, and the detection component is used to detect the opening state of the explosion-proof valve.

[0009] Optionally, the above-mentioned collection component includes:

[0010] a collecting plate, wherein the collecting plate is adapted to be fixed on the chassis;

[0011] Aluminum bars, wherein a plurality of aluminum bars are provided and are disposed on both sides of the collection plate. A welding portion is provided on the aluminum bar, and the welding portion is connected to the battery cell;

[0012] A collecting piece, one end of which is connected to the aluminum bar, and the other end of which is connected to the collecting plate.

[0013] Optionally, the collecting piece is configured to be L-shaped.

[0014] Optionally, the above-mentioned detection component includes:

[0015] a detection unit, the detection unit being used to detect a working signal of the explosion-proof valve;

[0016] A first connecting line, one end of which is connected to the detection unit, and the other end of which is suitable for being connected to the explosion-proof valve.

[0017] Optionally, a first through hole is provided on the chassis corresponding to the welding portion and the battery cell; the welding portion passes through the first through hole and is connected to the battery cell;

[0018] A second through hole is provided on the chassis corresponding to the explosion-proof valve and the detection part, and the detection part is suitable for directly detecting the working signal of the explosion-proof valve through the second through hole.

[0019] Optionally, a third through hole is further provided on the acquisition board, and the detection unit is installed in the third through hole.

[0020] Optionally, the above-mentioned explosion-proof detection module further includes a cover plate, and a buckle portion is provided on a side of the cover plate close to the chassis;

[0021] The chassis is provided with a buckling position corresponding to the buckling portion; the buckling portion is adapted to be embedded in the buckling position so that the cover plate is covered on the chassis;

[0022] The cover plate is provided with a guide groove for placing the circuit.

[0023] Optionally, a plurality of thermal rivet studs are provided on the chassis, and the number of the thermal rivet studs is greater than the number of the battery cells.

[0024] A battery module, comprising the above-mentioned explosion-proof detection module;

[0025] The battery module further includes:

[0026] A battery cell group, wherein the battery cell group includes a plurality of battery cells, wherein the plurality of battery cells are combined together through an assembly structure, and the explosion-proof detection module is connected to the electrode columns of the battery cells;

[0027] A covering member is provided with a placement groove at one end of the covering member close to the battery cell group, and the covering member is suitable for being arranged at the top of the battery cell group to cover the explosion-proof detection module in the placement groove.

[0028] Optionally, the battery module further comprises a linear arrangement, wherein the linear arrangement comprises:

[0029] a first connecting member, wherein the first connecting member is adapted to be connected to the acquisition board;

[0030] a second connecting member, the second connecting member being adapted to be connected to an external management system;

[0031] A second connecting line, both ends of which are connected to the first connecting member and the second connecting member respectively, and the second connecting line is suitable for being placed in the guide groove.

[0032] The technical solution provided by the utility model has the following advantages:

[0033] 1. The explosion-proof detection module provided by the present invention includes: a chassis and a detection structure, wherein the chassis is suitable for being installed on a battery module; the detection structure includes a collection component and a detection member, wherein the detection member is connected to the collection component; the collection component is installed on the chassis, and the collection end of the collection component is suitable for being connected to the battery cell of the battery module, and the collection component is used to collect operating information of the battery cell; the detection member is installed on the collection component corresponding to the explosion-proof valve, and the detection member is used to detect the opening state of the explosion-proof valve.

[0034] This utility model not only utilizes the existing data acquisition structure to collect battery operating information, but also incorporates an additional acquisition component. Through-holes are provided on the chassis and acquisition board, and a fuse circuit is installed in the third through-hole. This allows for immediate detection of thermal runaway information, minimizing risks such as delays and misjudgments, and improving battery safety. Furthermore, after a runaway event occurs, the battery cell that first experienced thermal runaway can be traced, facilitating traceability and accountability for problematic cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof detection module provided in the present utility model;

[0037] Figure 2 This is a partial structural diagram of the chassis provided in the present utility model;

[0038] Figure 3 This is a schematic diagram of the installation of the collection plate, aluminum row and collection parts provided in the utility model;

[0039] Figure 4 This is a schematic structural diagram of the cover provided in the present utility model;

[0040] Figure 5 This is a structural schematic diagram of the detection structure provided in the utility model installed on the battery module;

[0041] Figure 6 This is a schematic structural diagram of a battery module provided by the present invention, comprising four groups of battery cells;

[0042] Figure 7 A schematic diagram of the cooperation between the cover assembly and the battery module provided in the present invention;

[0043] Figure 8 This is a schematic diagram of the structure of the linear bundle provided in the present utility model;

[0044] Figure 9 This is an integrated schematic diagram of the BMS provided in the present utility model;

[0045] Description of reference numerals:

[0046] 1- chassis; 11- first through hole; 12- second through hole;

[0047] 2 - detection structure; 21 - acquisition component; 211 - acquisition board; 212 - third through hole; 213 - aluminum bar; 214 - acquisition component; 22 - detection component; 221 - detection unit; 222 - first connecting line;

[0048] 3-cover plate; 31-guide groove; 32-fastening part

[0049] 4-hot riveting studs;

[0050] 5- buckle position;

[0051] 6 - battery module; 61 - battery cell group; 611 - battery cell; 62 - cover; 63 - linear bundle; 631 - first connecting member; 632 - second connecting member; 633 - second connecting line;

[0052] 71 - main control board; 72 - protective cover; 73 - cover cap;

[0053] 81-end plate; 82-binding strap. DETAILED DESCRIPTION

[0054] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0055] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0057] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0058] Example 1

[0059] This embodiment provides an explosion-proof detection module, such as Figures 1 to 9 As shown, it includes: chassis 1 and detection structure 2. Figure 1 As shown, the first direction is the length direction of the chassis 1 , and the second direction is the width direction of the chassis 1 .

[0060] like Figures 1 to 3As shown, the battery module 6 for the explosion-proof detection module in this embodiment includes two rows of battery cells 611 arranged in a close-fitting manner. The chassis 1 is symmetrically arranged with the center as the axis, and symmetrical structures are arranged on both sides corresponding to the two detection structures 2. The structure of one side of the symmetrical structure is described. The chassis 1 is a plate-like structure, in which a plurality of first through holes 11 are symmetrically provided on both sides along the first direction of battery arrangement, and second through holes 12 are provided in the middle along the first direction. The first through holes 11 are provided corresponding to the poles of the battery cells 611, and the second through holes 12 are provided corresponding to the explosion-proof valves. The first through holes 11 are arranged in a waist shape, and the second through holes 12 are circular.

[0061] like Figures 1 to 3 As shown, the detection structure 2 is mounted above the chassis 1. The detection structure 2 includes a collection assembly 21 and a detection member 22. The collection assembly 21 includes a collection plate 211, an aluminum bar 213, and a collection member 214. The collection plate 211 is fixed in the middle of the collection plate 211 along a first direction. A plurality of aluminum bars 213 are provided on either side of the collection plate 211. Welding portions are provided on the aluminum bars 213 corresponding to the first through-holes 11. The welding portions pass through the first through-holes 11 and are welded to the terminals of the battery cells 611.

[0062] like Figures 1 to 3 As shown, the collection plate 211 is provided with a plurality of third through holes 212 corresponding to the plurality of second through holes 12. The third through holes 212 extend vertically through the collection plate 211. A plurality of detection members 22 are provided, each disposed within the third through holes 212 corresponding to the plurality of second through holes 12. The detection members 22 include a detection portion 221 and a first connecting line 222. One end of the first connecting line 222 is connected to the detection portion 221, and the other end is connected to the explosion-proof valve.

[0063] like Figure 1 and Figure 4 As shown, the explosion-proof detection module in this embodiment also includes a cover plate 3, and a protruding snap-fit ​​portion 32 is provided on the side of the cover plate 3 close to the chassis 1, and a recessed snap-fit ​​position 5 is provided on the chassis 1 corresponding to the snap-fit ​​portion 32. Not only does it prevent dust and metal objects from falling directly, but a guide groove 31 for the straight wiring harness is also provided on the cover plate 3, which greatly saves the utilization of space in the battery pack. At the same time, a corresponding opening is also provided on the top of the acquisition board 211 to avoid affecting the function of the explosion-proof valve detection mechanism. In order to meet the snap-fit ​​tightness requirements of the cover plate 3, the number of the snap-fit ​​portions 32 of the cover plate 3 needs to be greater than two-thirds of the number of explosion-proof valves. For example: if the number of explosion-proof valves in this application is 17, the number of the snap-fit ​​portions 32 can be set to 22.

[0064] When monitoring the battery module 6, the explosion-proof detection module must be secured to the battery module 6. The top surface of the chassis 1 is equipped with multiple hot-riveting points. The number of hot-riveting points on the acquisition board 211 must be greater than the number of battery cells 611 to ensure a secure riveting connection. The number of hot-riveting points on the aluminum busbar 213 must be greater than three times the number of battery cells 611 to ensure a secure riveting connection. For example, if there are 26 battery cells 611, the number of hot-riveting points on the acquisition board 211 must be greater than 26, and can be 32. The number of hot-riveting points on the aluminum busbar 213 must be greater than 78, and can be 80.

[0065] The acquisition board 211 is placed on the chassis 1 along a first orientation, with the third through-hole 212 and the second through-hole 12 positioned correspondingly. Several aluminum bars 213 are placed on either side of the acquisition board 211 along the first orientation, with the welds on the bars 213 corresponding to the first through-holes 11. The acquisition board 211 and the bars 213 are integrated into the chassis 1 through a hot riveting process. Workers then weld the bars 213 to the telecommunications poles using the welds. An L-shaped acquisition component 214 is connected to the bars 213 at one end and to the acquisition board 211 at the other. The acquisition board 211 uses this component to collect the temperature and voltage of the battery cell 611, providing real-time monitoring of the battery cell's operating status. The detection component 22 within the third through-hole 212 monitors the opening status of the battery cell 611's explosion-proof valve in real time through the second through-hole 12. Once the valve is opened, the detection component 22 sends a signal to the system, providing a warning.

[0066] Specifically, the detection portion 221 of the detection member 22 is waist-shaped, with one end suspended and the other end fixed in the third through-hole 212 via two first connecting wires 222. After the explosion-proof valve of the battery cell 611 explodes, the detection member 22 may experience two situations. First, if the explosion-proof valve explodes, the electrolyte sprays out, causing the two first connecting wires 222 to fuse simultaneously, resulting in a signal failure in the acquisition system, which can easily determine that there is a problem with the explosion-proof valve of the battery cell 611. Second, if the two first connecting wires 222 are not broken, the sensor on the detection mechanism can also detect signals such as temperature or humidity of the explosion-proof valve of the battery cell 611, thereby determining whether the explosion-proof valve is open. The first connecting wires 222 can be connected to the acquisition member 214 in a variety of ways. For example, the first connecting line 222 and the third through hole 212 collecting member 214 can be connected in series to form a loop; or the first connecting line 222 and the third through hole 212 collecting member 214 can be connected in parallel to form a loop; or the first connecting line 222 and the third through hole 212 collecting member 214 can form separate loops.

[0067] The present invention not only utilizes the existing data acquisition structure to collect battery operating information, but also incorporates a collection component 214. Through-holes are provided on the chassis 1 and the acquisition board 211, and a fuse circuit is provided on the third through-hole 212. This allows for immediate detection of thermal runaway information, minimizing risks such as delays and misjudgments, and improving battery safety. Furthermore, after a runaway event occurs, the battery cell 611 that first experienced thermal runaway can be traced, facilitating traceability and accountability for the problem battery cell 611.

[0068] The collection piece 214 in this embodiment is a flexible collection piece 214. Compared with the existing technology, it can not only realize the explosion-proof valve detection function, but also save costs; and the L-shaped collection piece 214 can absorb deformation in two directions, making up for the defects of the PCB collection board 211 having high rigidity and low elasticity and being unable to absorb the long-life expansion of the battery cell 611; other forms such as arc shape, T shape, and straight shape can also be adopted.

[0069] Example 2

[0070] This embodiment provides a battery module 6, such as Figures 5 to 9 As shown, it includes the explosion-proof detection module mentioned in Example 1. The battery module 6 also includes a cell group 61 and a cover 5. The cell group 61 includes a plurality of cells 611, and a plurality of third through hole 212 cells 611 are combined together through an assembly structure, and the third through hole 212 explosion-proof detection module is connected to the electrode column of the third through hole 212 cell 611. A placement groove is provided at one end of the cover 5 close to the third through hole 212 cell group 61, and the third through hole 212 cover 5 is suitable for being arranged at the top of the third through hole 212 cell group 61 to cover the third through hole 212 explosion-proof detection module in the third through hole 212 placement groove. The assembly structure is an end plate 81 and a binding strap 82.

[0071] by Figure 5 For example, the battery module 6 has 26 cells 611, which are stacked in double rows by extrusion, with end plates 81 provided at both ends, and then integrated by straps 82. Finally, the battery module 6 is integrated by pole welding explosion-proof detection module.

[0072] Figure 6 shows a schematic diagram of the battery pack layout. This battery pack comprises four battery modules 6, each with 26 cells 611 connected in series to form a 1P104S battery pack. This embodiment is not limited to the number of cells 611 connected in series or parallel within each battery module 6; any module and battery pack with this explosion-proof valve detection function is protected by this patent.

[0073] The front and rear modules of this battery pack are different, differing in the number of output poles. The front modules have two additional output poles to facilitate series connection with the rear modules; the rear modules are connected via aluminum busbars 213, reducing the number of output poles. This significantly reduces costs, as the module output poles and external copper busbars are significantly more expensive than a single aluminum busbar 213. Compared to conventional battery packs with only two battery modules 6, this battery pack not only has a higher level of integration but also boasts a higher energy density per cell, with a 126% increase in total energy and a 13% increase in volumetric energy density.

[0074] like Figure 7 and Figure 8 As shown, after the battery module 6 is assembled, a linear bundle 63 is required to connect the acquisition board 211 to the BMS to connect the collected signals to the external piping system. Specifically, the linear bundle 63 includes a first connector 631, a second connector 632, and a second connecting line 633. The first connector 631 is the module-side connector, the second connector 632 is the BMS-side connector, and the second connecting line 633 is the wiring of the linear bundle 63. The linear bundle 63 supports communication between the battery module 6 and the battery pack controller.

[0075] Inline wiring harnesses utilize a lamination process, where multiple wires are neatly compressed into a thin sheet. Compared to conventional wiring harnesses, these are only approximately 0.5mm-1mm thick, 30-35mm wide, and weigh only one-tenth the weight. When integrated, individual inline wiring harnesses are lightweight and easily foldable. The addition of insulation and fire-resistant sealants to the surface can meet the design requirements of the battery pack wiring harness. Materials include PC, PP, ABS, and PA66. Multiple inline wiring harnesses can be integrated within the battery pack by folding or gluing, saving space and significantly improving the pack's energy and volume density.

[0076] like Figure 9 As shown, the BMS utilizes a highly integrated design: the BMS main control board 71, BMS protective cover 72, and sealing gasket are directly integrated into the BMS cap 73. The BMS cap 73 is directly mounted to the inner surface of the placement groove of the cover 62. This reduces the number of commonly designed components such as the BMS housing and bracket, while also meeting the sealing requirements of the battery pack. The cover 62 encloses the entire battery pack, battery module 6, and explosion-proof detection module within it, and utilizes a sealing gasket for installation. This not only saves space but also reduces integration costs. It also prevents the ingress of dust and other impurities.

[0077] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An explosion-proof detection module, characterized in that: include: A chassis (1), wherein the chassis (1) is suitable for being mounted on a battery module (6); A detection structure (2), the detection structure (2) comprising a collection component (21) and a detection member (22), the detection member (22) being connected to the collection component (21); the collection component (21) being mounted on the chassis (1), the collection end of the collection component (21) being adapted to be connected to a cell (611) of the battery module (6), the collection component (21) being used to collect operating information of the cell (611); The detection component (22) is mounted on the collection component (21) corresponding to the explosion-proof valve, and the detection component (22) is used to detect the opening state of the explosion-proof valve.

2. The explosion-proof detection module according to claim 1, characterized in that: The collection component (21) comprises: a collecting plate (211), the collecting plate (211) being suitable for being fixed on the chassis (1); Aluminum bars (213), a plurality of aluminum bars (213) are provided, and the plurality of aluminum bars (213) are respectively arranged on both sides of the collection plate (211); a welding portion is provided on the aluminum bar (213), and the welding portion is connected to the battery core (611); A collecting piece (214), one end of which is connected to the aluminum bar (213), and the other end of which is connected to the collecting plate (211).

3. The explosion-proof detection module according to claim 2, characterized in that: The collecting member (214) is configured to be L-shaped.

4. The explosion-proof detection module according to claim 2, characterized in that: The detection member (22) comprises: A detection unit (221), the detection unit (221) is used to detect a working signal of the explosion-proof valve; A first connecting line (222), one end of which is connected to the detection portion (221), and the other end of which is suitable for being connected to the explosion-proof valve.

5. The explosion-proof detection module according to claim 4, characterized in that: A first through hole (11) is provided on the chassis (1) corresponding to the welding portion and the battery core (611); the welding portion passes through the first through hole (11) and is connected to the battery core (611); A second through hole (12) is provided on the chassis (1) corresponding to the explosion-proof valve and the detection portion (221), and the detection portion (221) is suitable for directly detecting the working signal of the explosion-proof valve through the second through hole (12).

6. The explosion-proof detection module according to claim 5, characterized in that: The collection plate (211) is further provided with a third through hole (212), and the detection unit (221) is installed in the third through hole (212).

7. The explosion-proof detection module according to claim 5, characterized in that: The explosion-proof detection module further comprises a cover plate (3), and a buckling portion (32) is provided on a side of the cover plate (3) close to the chassis (1); The chassis (1) is provided with a buckling position (5) corresponding to the buckling portion (32); the buckling portion (32) is adapted to be embedded in the buckling position (5) so that the cover plate (3) covers the chassis (1); The cover plate (3) is provided with a guide groove (31) for placing the circuit.

8. The explosion-proof detection module according to claim 7, characterized in that: A plurality of thermal rivet columns (4) are provided on the chassis (1), and the number of the thermal rivet columns (4) is greater than the number of the battery cells (611).

9. A battery module, characterized in that: comprising the explosion-proof detection module according to any one of claims 1 to 8; The battery module (6) further comprises: A battery cell group (61), the battery cell group (61) comprising a plurality of battery cells (611), the plurality of battery cells (611) being combined together via an assembly structure, the explosion-proof detection module being connected to electrode columns of the battery cells (611); A covering member (62) is provided with a placement groove at one end of the covering member (62) close to the battery cell group (61), and the covering member (62) is suitable for being arranged at the top end of the battery cell group (61) to cover the explosion-proof detection module in the placement groove.

10. The battery module according to claim 9, characterized in that: The battery module (6) further includes a linear bundle (63), and the linear bundle (63) includes: a first connecting member (631), the first connecting member (631) being adapted to be connected to the collecting plate (211); a second connecting member (632), the second connecting member (632) being adapted to be connected to an external management system; A second connecting line (633), the two ends of which are respectively connected to the first connecting member (631) and the second connecting member (632), and the second connecting line (633) is suitable for being placed in the guide groove (31).

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