Auxiliary tool for mounting sampling line of battery module

Abstract

The utility model relates to the technical field of battery module assembly, and discloses an auxiliary tool for mounting a sampling line of a battery module, which comprises a protective main board, at least one working cavity penetrating through the opposite surfaces of the protective main board is arranged on the protective main board, and the working cavity is used for accommodating a PCB (printed circuit board) fixed on the battery module. A plurality of bulges are arranged on one side in the working cavity at intervals and are used for isolating positive and negative electrodes of two adjacent battery cells of the battery module, so that the sampling line is effectively prevented from touching the positive and negative electrodes of the adjacent battery cells of the battery module in a locking process to form conduction; besides, the groove between any two adjacent bulges is used for exposing a sampling hole site, which is used for being connected with a sampling line on the PCB, on the busbar of the battery cell, and other hole sites on the busbar are shielded by the bulges, so that only one sampling hole site of the busbar is exposed in the groove; an operator only needs to lock the sampling line in the sampling hole exposed in the groove, so that the sampling line is effectively prevented from being locked by mistake in the operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of battery module assembly, and particularly relates to an auxiliary tool for installing a sampling wire of a battery module. Background Art

[0002] The installation of the sampling wire of the battery module is an important link in the battery manufacturing process. Among them, the sampling wire is usually electrically connected to the PCB board of the battery module, and one end of the sampling wire facing away from the PCB board is connected and fixed to the bus bar of the battery cell of the battery module through a screw for sampling data such as the temperature and voltage of the battery cell. At present, the existing auxiliary tool usually uses an insulating material to block the positive and negative electrodes of adjacent battery cells of the battery module to prevent the sampling wire from touching the positive and negative electrodes of adjacent battery cells during the locking process to form conduction. However, using an insulating material to block the positive and negative electrodes of adjacent battery cells of the battery module only plays an isolation role. If a metal foreign object (such as a screw) falls, it is easy to roll into the battery module, resulting in the failure of its protection; in addition, during the locking process of the sampling wire and the sampling hole position of the bus bar, due to the lack of anti-misalignment function between the sampling hole position and the connection hole position on the bus bar, there is a risk that the sampling wire is locked in the wrong position. Summary of the Utility Model

[0003] One of the main purposes of the utility model is to provide an auxiliary tool for installing a sampling wire of a battery module, which can not only effectively prevent the sampling wire from touching the positive and negative electrodes of adjacent battery cells of the battery module during the locking process to form conduction, but also effectively prevent the sampling wire from being locked in the wrong position with the sampling hole position of the bus bar.

[0004] To achieve the above utility model purpose, the utility model provides an auxiliary tool for installing a sampling wire of a battery module, including a protection main board installed on the upper surface of the battery cell of the battery module. At least one working cavity penetrating through the opposite surfaces of the protection main board is provided on the protection main board. The working cavity accommodates a PCB board connected to the bus bar of the battery cell. A plurality of protrusions are arranged at intervals on one side in the working cavity. The positive and negative electrodes of adjacent battery cells are isolated by the protrusions. The sampling hole position on the bus bar is exposed in the groove formed between adjacent two protrusions. The connection hole position on the bus bar is blocked by the protrusion. The sampling wire on the PCB board is connected to the sampling hole position.

[0005] Further, an insulating soft magnetic strip is attached to the inner wall of the groove.

[0006] Further, an insulating soft magnetic strip is attached to the surface of the protection main board facing away from the battery module.

[0007] Further, positioning columns are arranged at both opposite ends of the protection main board. The two positioning columns are respectively used for being adapted to the positioning holes arranged on the opposite side end plates of the battery module.

[0008] Further, the center points of the two positioning holes are offset. The center line of the connection line between the center points of the two positioning holes is center line A, and the center line of the connection line between the center points of the two positioning posts is center line B. Center line A and center line B are offset.

[0009] Further, a chamfer structure is provided at the edge of the end face of one end of the positioning post for inserting into the positioning hole.

[0010] Further, inverted "L"-shaped cuts are formed on opposite sides of the positioning post along the direction in which it is inserted into the positioning hole.

[0011] Further, the two cuts are offset.

[0012] Further, a hollowed-out portion is formed on the isolation portion between adjacent two working chambers.

[0013] Further, a handle is further provided on the surface of the protective main board facing away from the battery module.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] When the auxiliary tooling of the present utility model is in use, the protective main board is fixed on the battery module, and the battery cells of the battery module are located below the protective main board. Since the working chamber on the protective main board is a through chamber, it can accommodate the PCB board fixed on the battery module. That is, after the protective main board is fixedly installed on the battery module, the PCB board on the battery module is located in the working chamber; since a plurality of protrusions are spaced apart on one side in the working chamber, the positive and negative electrodes between adjacent two battery cells in the battery module are isolated by the protrusions, thereby effectively preventing the sampling wires on the PCB board from touching the positive and negative electrodes of adjacent battery cells in the battery module during the locking process to form conduction and form a loop, resulting in a short circuit; in addition, other hole positions on the bus bar of the battery cell are blocked by the protrusions, and only the sampling hole positions for connecting with the sampling wires are exposed in the grooves between adjacent two protrusions. In this way, the operator only needs to lock the sampling wires at the sampling hole positions exposed in the grooves, thereby effectively preventing the sampling wires from being locked at the wrong positions during the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural view of the back side of the auxiliary tooling of the present utility model facing away from the battery module;

[0017] Figure 2 It is a top view of the auxiliary tooling of the present utility model installed on the battery module;

[0018] Figure 3 It is a side view of the auxiliary tooling of the present utility model;

[0019] Figure 4 The structural schematic diagram of the battery module according to an embodiment of the present utility model;

[0020] Figure 5 The structural schematic diagram of the positioning post according to an embodiment of the present utility model;

[0021] Figure 6 The schematic principle diagram before and after the rotation of the positioning post according to an embodiment of the present utility model.

[0022] Reference numerals in each drawing:

[0023] 1. Protective main board; 10. Working cavity; 100. Protrusion; 101. Groove; 11. Isolation part; 110. Hollow part; 12. Positioning post; 120. Cut; 121. Step; 2. Electric core; 20. Bus bar; 21. Sampling hole position; 210. Connection hole position; 22. End plate; 220. Positioning hole; 3. PCB board; 30. Sampling wire; 4. Insulating soft magnetic strip; 5. Handle. Detailed implementation manners

[0024] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "width", "upper", "lower", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 construed as a limitation to the present utility model.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0028] Please refer to Figures 1-6 , the present utility model provides an auxiliary tool for installing sampling wires of a battery module, which includes a protective main board 1. The protective main board 1 is installed on the upper surface of the battery cells of the battery module. At least one working cavity 10 penetrating through the opposite surfaces of the protective main board 1 is provided. The working cavity 10 accommodates a PCB board 3 connected to the bus bar 20 of the battery cells, that is, the working cavity 10 houses and fixes the PCB board 3 on the battery module, and the working cavity 10 also provides a working space for locking the sampling wires. In addition, a plurality of protrusions 100 are arranged at intervals on one side of the working cavity 10 close to the bus bar 20. The positive and negative electrodes of adjacent battery cells are isolated by the protrusions 100. The sampling hole positions 21 on the bus bar 20 are exposed in the groove 101 formed between two adjacent protrusions 100, and the connection hole positions 210 on the bus bar are blocked by the protrusions 100. The sampling wires 30 on the PCB board 3 are connected to the sampling hole positions 21. When the auxiliary tool of the present utility model is in use, the protective main board 1 is installed and fixed on the battery module, so that the battery cells 2 of the battery module are located below the protective main board 1. Since the working cavity 10 on the protective main board 1 is a hollow cavity, it can house and fix the PCB board 3 on the battery module, that is, after the protective main board 1 is fixedly installed on the battery module, the PCB board 3 on the battery module is located in the working cavity 10. Since a plurality of protrusions 100 are arranged at intervals on one side of the working cavity 10, the positive and negative electrodes between adjacent battery cells 2 in the battery module are isolated by the protrusions 100, thereby effectively preventing the sampling wires 30 on the PCB board 3 from touching the positive and negative electrodes of adjacent battery cells 2 in the battery module during the locking process to form conduction and form a loop, resulting in a short circuit. In addition, the connection hole positions 210 on the bus bar 20 of the battery cells 2 are blocked by the protrusions 100, and only the sampling hole positions 21 for connecting with the sampling wires 30 are exposed in the groove 101 between two adjacent protrusions 100. In this way, the operator only needs to lock the sampling wires 30 at the sampling hole positions 21 exposed in the groove 101, thereby effectively preventing the sampling wires 30 from being locked at the wrong position during the operation process.

[0029] In one embodiment, insulating soft magnetic strips 4 are attached to both the surface of the protection main board 1 facing away from the battery module and the inner wall of the groove 101. Since the insulating soft magnetic strips 4 have magnetism, during the operation of locking the sampling line 30 on the PCB board 3 with the above-mentioned sampling hole positions 21 by screws, due to the demagnetization of the magnetic ring at the tip of the screwdriver and the mistakes made by the operator during the process of grasping the screws, the screws may fall into the module interior, causing the positive and negative electrodes of the battery to conduct and the battery pack to short-circuit abnormally, posing a safety risk. Therefore, the insulating soft magnetic strips 4 can effectively adsorb metal foreign objects, prevent them from touching the positive and negative electrodes of the battery to form conduction, and thus avoid short circuits.

[0030] In one embodiment, the sizes of the protrusions 100 are different. Exemplarily, the protrusions 100 with larger areas block the connection hole positions 210 on the bus bar 20, and the protrusions 100 with smaller areas isolate the positive and negative electrodes between adjacent battery cells 2. In this way, it is possible to avoid all the protrusions 100 having too large an area and occupying space.

[0031] Of course, in other embodiments, the sizes of the protrusions 100 can also be the same, that is, the areas of all the protrusions 100 are the same. The protrusions 100 are used to isolate the positive and negative electrodes between adjacent battery cells 2, and it is only necessary to ensure that a hole position for connecting with the sampling line 30 is exposed in the groove 101 between two adjacent protrusions 100.

[0032] In one embodiment, a plurality of working cavities 10 are provided. There is a PCB board 3 in each working cavity 10. Exemplarily, the battery module has multiple rows of battery cells 2, the arrangement direction of each row of battery cells 2 is the same as the length direction of the working cavity 10, and each row of battery cells 2 corresponds to a working cavity 10. In this way, the sampling lines 30 on multiple PCB boards 3 can be simultaneously connected and locked with the sampling holes on the bus bars 20 of different rows of battery cells 2, thereby increasing the installation efficiency of the sampling lines 30. In addition, the volumes of the working cavities 10 in this embodiment are different, so that the function of preventing misplacement of the PCB placement can be achieved. For example, only the A-type PCB board 3 can be placed in the working cavity 10A, and only the B-type PCB board 3 can be placed in the working cavity 10B. Of course, in other embodiments, the volumes of the working cavities 10 can also be the same, which is not limited here.

[0033] In one embodiment, referring to Figure 1 , positioning posts 12 are provided at both opposite ends of the protection main board 1. The positioning posts 12 can be fixed to the protection main board 1 by bolts or welding. The positioning posts 12 are square columns, and the two positioning posts 12 are respectively used for plugging and matching with the positioning holes 220 provided on the opposite side end plates 22 of the battery module, so as to fix the protection main board 1 on the battery module. Through the plugging and matching structure of the positioning posts 12 and the positioning holes 220, the installation and fixation of the protection main board 1 can be facilitated, which is convenient and fast, and improves the work efficiency.

[0034] In one embodiment, referring to Figure 6, the center points of the two positioning holes 220 are misaligned. The center line of the connection line between the center points of the two positioning holes 220 is center line A, and the center line of the connection line between the center points of the two positioning posts 12 is center line B. Center line A and center line B are misaligned. The intersection point of center line A and the connection line between the center points of the two positioning holes 220 is intersection point C. In this way, the distance between the center point of one positioning post and intersection point C is greater than or less than the distance between the center point of the other positioning post and intersection point C. Based on center line A, after the protection main board 1 rotates 180 degrees, the positions of the two positioning posts 12 after rotation do not coincide with the positions of the two positioning posts 12 before rotation. This means that after the direction of the protection main board 1 is reversed, there will be interference between the positioning posts 12 and the positioning holes 220, and it is very difficult to insert the positioning posts 12 into the positioning holes 220. That is, if the direction of the protection main board 1 is installed incorrectly, the positioning posts 12 cannot be inserted into the positioning holes 220 of the battery module, thus achieving the anti-misalignment effect of the tooling installation direction.

[0035] In one embodiment, on the opposite sides of the positioning post 12 along the direction of its insertion into the positioning hole 220, there are cutouts 120, and the cutouts 120 are in an inverted "L" shape. Refer to Figure 5 , the inverted "L" shaped cutouts 120 have steps 121, and the steps 121 of the two cutouts 120 on the positioning post 12 are misaligned. In this way, the operator can visually judge the orientation of the tooling and distinguish positions during tooling assembly.

[0036] In one embodiment, refer to Figure 5 , at the end face edge of the end of the positioning post 12 for inserting into the positioning hole 220, there is a chamfer structure, which can facilitate the insertion of the positioning post 12 into the positioning hole 220. On this basis, since the steps 121 of the two cutouts 120 on the positioning post 12 are misaligned, the operator can visually judge the orientation of the tooling and distinguish positions during tooling assembly.

[0037] In one embodiment, refer to Figure 1 , on the isolation part 11 between two adjacent working cavities 10, there is a hollow part 110, which can reduce the weight of the protection main board 1, thus achieving the effect of reducing the weight of the tooling.

[0038] In one embodiment, refer to Figure 3 , on the surface of the protection main board 1 facing away from the battery module, there is also a handle 5. The number of handles 5 is two, and the two handles 5 are fixed on the isolation part 11 by screws. The two handles 5 are beneficial for the operator to move the tooling.

[0039] The above are only the preferred embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. An auxiliary tool for installing a sampling line of a battery module, characterized in that: The invention comprises a protective mainboard installed on the upper surface of the battery cell of the battery module, wherein the protective mainboard is provided with at least one working cavity penetrating the opposite surface thereof, wherein the working cavity accommodates a PCB board connected to the bus of the battery cell, wherein a plurality of protrusions are arranged at intervals on one side of the working cavity, wherein the positive and negative electrodes of two adjacent battery cells are isolated by the protrusions, wherein the sampling holes on the bus are exposed in the groove formed between the two adjacent protrusions, and the connection holes on the bus are blocked by the protrusions, and the sampling lines on the PCB board are connected to the sampling holes.

2. The auxiliary tooling for installing the sampling line of the battery module according to claim 1, characterized in that: An insulating soft magnetic strip is attached to the inner wall of the groove.

3. The auxiliary tooling for installing the sampling line of the battery module according to claim 1 or 2, characterized in that: An insulating soft magnetic strip is attached to the surface of the protective mainboard facing away from the battery module.

4. The auxiliary tooling for installing the sampling line of the battery module according to claim 1, characterized in that: Positioning posts are provided at opposite ends of the protective main board, and the two positioning posts are respectively used to fit with positioning holes provided on opposite side end plates of the battery module.

5. The auxiliary tooling for installing the sampling line of the battery module according to claim 4, characterized in that: The center points of the two positioning holes are staggered, the center line of the line between the center points of the two positioning holes is center line A, the center line of the line between the center points of the two positioning columns is center line B, and the center line A and the center line B are staggered.

6. The auxiliary tooling for installing the sampling line of the battery module according to claim 5, characterized in that: The edge of the end surface of one end of the positioning post for inserting into the positioning hole is provided with a chamfered structure.

7. The auxiliary tooling for installing the sampling line of the battery module according to claim 4, characterized in that: Inverted "L"-shaped cutouts are provided on opposite sides of the positioning column along the direction in which the positioning column is inserted into the positioning hole.

8. The auxiliary tooling for installing the sampling line of the battery module according to claim 7, characterized in that: The two incisions are arranged in a staggered manner.

9. The auxiliary tooling for installing the sampling line of the battery module according to claim 1, characterized in that: A hollow portion is provided on the isolation portion between two adjacent working chambers.

10. The auxiliary tooling for installing the sampling line of the battery module according to claim 1, characterized in that: A handle is also provided on the surface of the protective mainboard facing away from the battery module.

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