A connection structure between a fuel cell stack and a fuel cell CVM controller and a fuel cell stack assembly

Abstract

The present invention discloses a connection structure between a battery stack and a fuel cell CVM controller, and a battery stack assembly. The connection structure between the battery stack and the fuel cell CVM controller includes: a base, a buffer bar, and a pressure rod for fixing to the battery stack; the base is provided with a first slot for the buffer bar to be inserted into, a second slot for the metal sheet on the battery cell of the battery stack to be inserted into, and a third slot for the wiring harness of the CVM controller to pass through and communicate with the second slot; the pressure rod is connected to the buffer bar. The connection structure between the battery stack and the fuel cell CVM controller of the present invention can achieve a stable connection between the CVM controller and the fuel cell, thereby improving the detection reliability of the single-chip battery voltage while avoiding damage to the battery stack, and belongs to the technical field of battery stacks.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell stacks, and in particular to a connection structure between a fuel cell stack and a fuel cell CVM controller, and a fuel cell stack assembly. Background Art

[0002] The chip voltage monitoring (CVM) controller is an important component for monitoring the operating conditions of fuel cell engines. The fuel cell stack is composed of multiple single-chip fuel cells stacked in series. Since factors such as operating temperature, humidity, pressure and mechanical damage directly affect the single-chip voltage of the fuel cell, the use of a single-chip voltage monitoring (CVM) controller can monitor the voltage of all or part of the cells in the entire stack in real time according to demand, and thus accurately grasp the operating status of the stack. The connection between the existing CVM controller and the fuel cell stack is generally inserted into the jack designed for the fuel cell through a metal pin or a metal connector block. There is no reasonable measure to ensure that the CVM controller and the fuel cell are in complete and close contact under harsh operating conditions. The connection between the CVM controller and the fuel cell is easy to loosen or fall off, and may even cause damage to the fuel cell during installation, making the overall reliability of the stack assembly low. Summary of the Invention

[0003] In response to the technical problems existing in the prior art, the purpose of the present invention is to provide a connection structure between a fuel cell stack and a fuel cell CVM controller and a fuel cell stack assembly. The connection structure between the fuel cell stack and the fuel cell CVM controller of the present invention can be fixed on the fuel cell stack by a pressure rod, and the second trough body and the metal sheet welded on the fuel cell are engaged to achieve a stable connection between the CVM controller and the fuel cell, thereby improving the detection reliability of the single-chip battery voltage.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A connection structure between a fuel cell stack and a fuel cell CVM controller comprises a base, a buffer strip, and a pressure rod for fixing to the fuel cell stack; the base is provided with a first slot for snapping the buffer strip into, a second slot for snapping into the metal sheet on the battery cell of the fuel cell stack, and a third slot for passing the wiring harness of the CVM controller and communicating with the second slot; the pressure rod is connected to the buffer strip.

[0006] Furthermore, the buffer strip has a fourth slot body, and the pressure rod is inserted into the fourth slot body.

[0007] Furthermore, the first trough body has a first inner wall and a second inner wall arranged at intervals along a predetermined straight line direction, the first inner wall and the second inner wall are arranged opposite to each other, and the buffer strip has a first outer wall and a second outer wall arranged in sequence along the predetermined straight line direction; the distance between the first outer wall and the second outer wall is greater than the distance between the first inner wall and the second inner wall, the first outer wall abuts against the first inner wall, and the second outer wall abuts against the second inner wall.

[0008] Furthermore, the first trough body further comprises a bottom wall connecting the first inner wall and the second inner wall, the buffer strip further comprises a third outer wall connecting the first outer wall and the second outer wall, and a predetermined gap is provided between the third outer wall and the bottom wall.

[0009] Furthermore, the pressure rod is made of metal, and the buffer strip is made of non-metal.

[0010] Furthermore, the connection structure between the fuel cell stack and the fuel cell CVM controller also includes a limiting member pivotally connected to the seat body through a pivot; the seat body is also provided with a fifth slot body connected to the second slot body, and the limiting member has a positioning portion for clamping into the positioning groove of the metal sheet, and the limiting member switches between a first position and a second position; when the limiting member is in the first position, the positioning portion extends from the fifth slot body into the second slot body and clamps into the positioning groove of the metal sheet, and when the limiting member is in the second position, the positioning portion is disengaged from the positioning groove of the metal sheet.

[0011] Furthermore, the connection structure between the fuel cell stack and the fuel cell CVM controller also includes a torque spring that is sleeved on the pivot and used to apply elastic force to the limiting member so that the positioning part is stuck in the positioning groove of the metal sheet; the torque spring has a first connecting end and a second connecting end, the first connecting end is connected to the limiting member, and the second connecting end is connected to the seat body.

[0012] Furthermore, the limiting member is L-shaped.

[0013] A fuel cell stack assembly includes a housing, a plurality of battery cells mounted in the housing, a wiring harness, a bracket mounted on the housing, a CVM controller mounted on the bracket, and a connection structure between the fuel cell stack and the fuel cell CVM controller as described above; there are multiple connection structures;

[0014] Each of the battery cells is provided with a metal sheet for being inserted into the second slot; the plurality of connection structures correspond one to one with the plurality of metal sheets;

[0015] One end of the wiring harness passes through the third slot body and the second slot body and is connected to the metal sheet, and the other end of the wiring harness is provided with a connector for connecting to the CVM controller.

[0016] Furthermore, each of the metal sheets is provided with a positioning groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the connection structure between the battery stack and the fuel cell CVM controller of the present invention can be fixed to the battery unit by a pressure rod. The connection structure is first engaged with the second slot body and the metal sheet welded to the fuel cell, and then the metal sheet is positioned by the limiter, thereby increasing the contact area between the connection structure and the fuel cell, making the connection between the metal sheet and the wiring harness more secure, and achieving a stable connection between the CVM controller and the fuel cell. The buffer strip of the present invention has low hardness and is compressible. Even if the battery stack is displaced and deformed due to vibration, it can ensure that the pressure rod is tightly engaged in the fourth slot body of the buffer strip. The pressure rod fixed to the battery unit is used to ensure that the wiring harness will not loosen or fall off. At the same time, it is ensured that the metal sheet will not break when the fuel cell vehicle vibrates violently, thereby avoiding the inability to detect the single-chip voltage signal due to the breakage of the metal sheet, and improving the detection reliability of the single-chip battery voltage. The present invention is easy to install, disassemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a partial cross-sectional view of the connection structure between the fuel cell stack and the fuel cell CVM controller.

[0019] Figure 2 This is a structural diagram of the CVM controller.

[0020] Figure 3 yes Figure 2 Magnified view of point A.

[0021] Figure 4 This is an exploded view of the battery stack assembly.

[0022] Figure 5 This is the main view of the battery stack assembly.

[0023] Figure 6 It is a side view of the battery stack assembly.

[0024] In the figure, 1. box body; 2. CVM controller; 3. connection structure; 4. wiring harness; 5. bracket; 6. metal sheet; 7. positioning groove; 8. connector; 31. seat body; 32. buffer strip; 33. pressure rod; 34. predetermined gap; 35. pivot; 36. limit member; 37. torque spring; 311. second slot body; 312. third slot body; 313. fifth slot body; 371. first connection end; 372. second connection end. DETAILED DESCRIPTION

[0025] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] In describing the present invention, it should be understood that the terms "first," "second," and so forth are used to describe various types of information, but such information should not be limited to these terms; these terms are used solely to distinguish information of the same type from one another. For example, "first" information could be referred to as "second" information, and similarly, "second" information could be referred to as "first" information without departing from the scope of the present invention.

[0029] like Figures 1 to 3As shown, this embodiment provides a connection structure 3 between a fuel cell stack and a fuel cell CVM controller 2, comprising a base 31, a buffer bar 32, and a pressure rod 33 for fixing to the fuel cell stack; the pressure rod 33 is fixed to the fuel cell stack by bolts, and the buffer bar 32 is mounted on the pressure rod 33. The base 31 is provided with a first slot for the buffer bar 32 to be inserted, a second slot 311 for the metal sheet 6 on the battery cell of the fuel cell stack to be inserted, and a third slot 312 for the wiring harness 4 of the CVM controller 2 to pass through and communicate with the second slot 311; the buffer bar 32 is inserted into the first slot to achieve a stable connection between the buffer bar 32 and the base 31, and the pressure rod 33 is connected to the buffer bar 32 so that the pressure rod 33 can fix the base 31. The base 31 is used to connect the fuel cells of the fuel cell stack and the fuel cell CVM controller 2. The cable or wiring harness 4 of the CVM controller 2 is connected to the fuel cells of the fuel cell stack through the base 31. A metal sheet 6 is welded to the fuel cell. When using the connection structure 3, the second slot of the base 31 is first used to sleeve the metal sheet 6 of the fuel cell, and the metal sheet 6 is snapped into the second slot. One end of the wiring harness 4 of the CVM controller 2 is connected to the CVM controller 2 of the CVM controller 2 via the connector 8. The other end of the wiring harness 4 of the CVM controller 2 passes through the third slot 312 and the second slot 311 of the base 31 and is connected to the metal sheet 6, thereby achieving the connection between the CVM controller 2 and the fuel cell stack. The connection structure 3 is relatively fixed to the fuel cell stack, so when vibration or other phenomena occur, the connection structure 3 is not easy to loosen or fall off, thereby avoiding the breakage of the metal sheet 6 or damage to the fuel cell, and improving the reliability of the connection between the fuel cell stack and the fuel cell CVM controller 2.

[0030] Specifically, in one embodiment, the buffer bar 32 has a fourth slot, into which the pressure rod 33 is inserted. A portion of the pressure rod 33 is embedded in the buffer bar 32, while the other portion is fixed to the battery stack.

[0031] Specifically, in one embodiment, the first trough body has a first inner wall and a second inner wall arranged opposite each other along a predetermined straight line, and the buffer strip 32 has a first outer wall and a second outer wall arranged sequentially along the predetermined straight line. The distance between the first outer wall and the second outer wall is greater than the distance between the first inner wall and the second inner wall, and the first outer wall abuts the first inner wall, while the second outer wall abuts the second inner wall. The buffer strip 32 and the base body 31 form a transition fit, that is, the groove width H1 of the first trough body is smaller than the width H2 of the buffer strip 32. This ensures that the buffer strip 32 is securely embedded in the first trough body and is not easily dislodged.

[0032] Specifically, in one embodiment, the first tank body further includes a bottom wall connecting the first inner wall and the second inner wall, and the buffer bar 32 further includes a third outer wall connecting the first outer wall and the second outer wall, with a predetermined gap 34 between the third outer wall and the bottom wall. The buffer bar 32 is not completely embedded in the bottom of the first tank body, and the distance H3 is greater than 0. When vibration occurs, the buffer bar 32 has space to vibrate. The buffer bar 32 can use the predetermined gap 34 to deform and absorb shock, thereby reducing vibration of the connection structure 3, thereby ensuring a more stable connection between the fuel cell stack and the CVM controller 2.

[0033] Specifically, in one embodiment, the compression rod 33 is metal, and the buffer strip 32 is non-metallic. The non-metallic buffer strip 32 has low hardness and compressibility, which can eliminate manufacturing tolerances in the battery stack. The compression rod 33 is strong enough to expand the buffer strip 32 when it is inserted into the buffer strip 32, allowing the buffer strip 32 to be firmly inserted into the first slot of the base 31. Even if the battery stack deforms in the X, Y, and Z directions, the compression rod 33 can be firmly pressed into the first slot of the base 31 by the buffer strip 32.

[0034] Specifically, in one embodiment, the connection structure 3 between the fuel cell stack and the fuel cell CVM controller 2 further includes a stopper 36 pivotally connected to the base 31 via a pivot 35. The base 31 further defines a fifth slot 313 communicating with the second slot 311. The stopper 36 includes a positioning portion for engaging with the positioning slot 7 of the metal sheet 6. The stopper 36 switches between a first position and a second position. When the stopper 36 is in the first position, the positioning portion extends from the fifth slot 313 into the second slot 311 and engages with the positioning slot 7 of the metal sheet 6. The positioning portion is located along the movement path of the metal sheet 6, thereby firmly connecting the metal sheet 6 to the base 31 and preventing the metal sheet 6 from detaching from the base 31. When the stopper 36 is in the second position, the positioning portion is released from the positioning slot 7 of the metal sheet 6. When the connection structure 3 needs to be released, the stopper 36 is rotated to release the positioning portion from the positioning slot 7 of the metal sheet 6, thereby achieving disassembly of the fuel cell stack and the CVM controller 2.

[0035] Specifically, in one embodiment, the connection structure 3 between the fuel cell stack and the fuel cell CVM controller 2 further includes a torque spring 37 mounted on the pivot 35 and configured to apply an elastic force to the stopper 36, causing the positioning portion to engage the positioning slot 7 of the metal sheet 6. The torque spring 37 has a first connection end 371 and a second connection end 372. The first connection end 371 is connected to the stopper 36, and the second connection end 372 is connected to the base 31. By pressing the stopper 36 to drive the stopper 36 rotation, the positioning portion disengages from the positioning slot 7 of the metal sheet 6, separating the connection structure 3 from the metal sheet 6 and achieving disassembly of the fuel cell stack and the CVM controller 2. When the stopper 36 is released, it automatically resets, and the positioning portion extends from the fifth slot 313 into the second slot 311. After the metal sheet 6 engages the first slot, the positioning portion automatically engages the positioning slot 7 of the metal sheet 6, ensuring a secure connection between the connection structure 3 and the metal sheet 6. The torque spring 37 increases the contact area between the connection structure 3 and the metal sheet 6 of the fuel cell.

[0036] Specifically, in one embodiment, the limiting member 36 is L-shaped.

[0037] like Figure 1 、 Figures 4 to 6 As shown, a fuel cell stack assembly includes a box body 1, multiple battery cells installed in the box body 1, a wiring harness 4, a bracket 5 installed on the box body 1, a CVM controller 2 installed on the bracket 5, and a connection structure 3 between the fuel cell stack and the fuel cell CVM controller 2 as described above; there are multiple connection structures 3; the multiple connection structures 3 are arranged in sequence, and the buffer strips 32 pass through the first slots of all the seats 31 in sequence and are stuck in all the first slots.

[0038] Each battery unit is provided with a metal sheet 6 for being inserted into the second slot 311 ; the plurality of connection structures 3 correspond to the plurality of metal sheets 6 in a one-to-one manner.

[0039] The CVM controller 2 is mounted on a bracket 5, which is fixed to the box 1 by bolts. The bracket 5 also serves to fix the CVM controller 2 and the wiring harness 4.

[0040] One end of the wiring harness 4 passes through the third slot 312 and the second slot 311 and is connected to the metal sheet 6 , and the other end of the wiring harness 4 is fixed on the bracket 5 and is provided with a connector 8 electrically connected to the CVM controller 2 .

[0041] Specifically, in one embodiment, each metal sheet 6 is provided with a positioning groove 7. After the metal sheet 6 is inserted into the first slot body, the positioning groove 7 is located inside the first slot body.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A connection structure between a fuel cell stack and a fuel cell CVM controller, characterized by: The battery pack comprises a base, a buffer bar, and a pressure rod for fixing to the battery stack; the base is provided with a first slot for the buffer bar to be inserted into, a second slot for the metal sheet on the battery cell of the battery stack to be inserted into, and a third slot for the wiring harness of the CVM controller to pass through and communicate with the second slot; the pressure rod is connected to the buffer bar; The buffer bar has a fourth slot body, and the pressure rod is inserted into the fourth slot body. When the pressure rod is inserted into the buffer bar, the buffer bar is expanded so that the buffer bar is firmly inserted into the first slot body of the base body; The first trough body has a first inner wall and a second inner wall arranged at intervals along a predetermined straight line direction, the first inner wall and the second inner wall being arranged opposite to each other, and the buffer strip has a first outer wall and a second outer wall arranged in sequence along the predetermined straight line direction; the distance between the first outer wall and the second outer wall is greater than the distance between the first inner wall and the second inner wall, the first outer wall abuts against the first inner wall, and the second outer wall abuts against the second inner wall; It also includes a limiting member pivotally connected to the base body via a pivot, wherein the limiting member has a positioning portion for engaging with the positioning groove of the metal sheet; It also includes a torsion spring that is sleeved on the pivot and is used to apply elastic force to the limiting member so that the positioning part is stuck in the positioning groove of the metal sheet; the torsion spring has a first connecting end and a second connecting end, the first connecting end is connected to the limiting member, and the second connecting end is connected to the seat body.

2. The connection structure between a fuel cell stack and a fuel cell CVM controller according to claim 1, characterized in that: The first slot body further comprises a bottom wall connecting the first inner wall and the second inner wall, and the buffer strip further comprises a third outer wall connecting the first outer wall and the second outer wall, with a predetermined gap being provided between the third outer wall and the bottom wall.

3. The connection structure between a fuel cell stack and a fuel cell CVM controller according to claim 1, characterized in that: The compression rod is made of metal, and the buffer strip is made of non-metal.

4. The connection structure between a fuel cell stack and a fuel cell CVM controller according to claim 1, characterized in that: The seat body is also provided with a fifth slot body connected to the second slot body, and the limiting member switches between a first position and a second position; when the limiting member is in the first position, the positioning portion extends from the fifth slot body into the second slot body and is stuck in the positioning slot of the metal sheet; when the limiting member is in the second position, the positioning portion is disengaged from the positioning slot of the metal sheet.

5. The connection structure between a fuel cell stack and a fuel cell CVM controller according to claim 1, characterized in that: The limiting member is L-shaped.

6. A battery stack assembly, characterized in that: It comprises a box, a plurality of battery cells installed in the box, a wiring harness, a bracket installed on the box, a CVM controller installed on the bracket, and a connection structure between the fuel cell stack and the fuel cell CVM controller according to any one of claims 1 to 5; there are multiple connection structures; Each of the battery cells is provided with a metal sheet for being inserted into the second slot; the plurality of connection structures correspond one to one with the plurality of metal sheets; One end of the wiring harness passes through the third slot body and the second slot body and is connected to the metal sheet, and the other end of the wiring harness is provided with a connector for connecting to the CVM controller.

7. The fuel cell stack assembly according to claim 6, characterized in that: Each of the metal sheets is respectively provided with a positioning groove.

Images