Collision monitoring device, battery pack and automobile

Abstract

The utility model discloses a collision monitoring device, a battery pack and an automobile, and relates to the technical field of automobiles, the collision monitoring device comprises a buffer piece, a first conductive piece, a first monitoring position, a second conductive piece and a second monitoring position, and the buffer piece is arranged in the battery pack; the first conductive part is laid on the buffer part, and the first monitoring position is electrically connected with the first conductive part so that the monitor can monitor the first conductive part; the second conductive part is laid on the buffer part, the second monitoring position is electrically connected with the second conductive part so that the monitor can monitor the second conductive part, and the second conductive part and the first conductive part are arranged at intervals in the thickness direction of the buffer part and are at least partially overlapped in the thickness direction of the buffer part; and when the battery pack is impacted, the buffer piece is extruded, so that the first conductive piece and the second conductive piece are electrically connected, or the first conductive piece and / or the second conductive piece are / is disconnected. According to the technical scheme provided by the utility model, the impact on the battery pack can be conveniently monitored, and the use safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a collision monitoring device, a battery pack and an automobile. Background Art

[0002] The battery pack of an electric vehicle is usually placed at the bottom of the vehicle. During the driving process, the vehicle will face various road conditions, and there is a risk of the vehicle bottoming out and being hit by flying stones. When the bottom of the battery pack is subjected to a large impact load, the battery cell may be damaged, causing serious impact on battery safety.

[0003] However, in the prior art, in order to monitor the impact on the battery pack, a pressure sensor can be added to the bottom of the battery pack to detect the impact on the battery pack. However, the area that a single pressure sensor can detect is limited. If it is desired to detect the bottom of the entire battery pack, multiple pressure sensors need to be set up, which will undoubtedly increase the cost of detection. Moreover, controlling multiple pressure sensors at the same time will make the detection structure more complicated, increasing the difficulty of implementation. Utility Model Content

[0004] The main purpose of the utility model is to provide a collision monitoring device, a battery pack and a car, aiming to facilitate the monitoring of the impact on the battery pack and improve the safety of the battery pack.

[0005] To achieve the above-mentioned purpose, the collision monitoring device proposed by the utility model comprises:

[0006] A buffer member, provided on the battery pack and located on a side of the battery pack facing the ground;

[0007] a first conductive member and a first monitoring position, wherein the first conductive member is laid on the buffer member, and the first monitoring position is electrically connected to the first conductive member so that a monitor can monitor the first conductive member; and

[0008] a second conductive member and a second monitoring position, wherein the second conductive member is laid on the buffer member, the second monitoring position is electrically connected to the second conductive member so that a monitor can monitor the second conductive member, and the second conductive member and the first conductive member are spaced apart from each other along a thickness direction of the buffer member and at least partially overlap each other along the thickness direction of the buffer member;

[0009] When the battery pack is impacted, the buffer is squeezed so that the first conductive member and the second conductive member are electrically connected, or the first conductive member and / or the second conductive member are disconnected.

[0010] In one embodiment, a plurality of conductive protrusions are provided on the first conductive member at intervals;

[0011] When the battery pack is impacted, the conductive protrusion passes through the buffer and abuts against the second conductive member, so that the first conductive member and the second conductive member are electrically connected.

[0012] In one embodiment, the end of the conductive protrusion away from the first conductive component is arranged in a pointed shape.

[0013] In one embodiment, an insulating sleeve is provided on the outer periphery of the first conductive member, and the insulating sleeve has a plurality of exposed portions that expose the first conductive member.

[0014] In one embodiment, the second conductive member is configured as a conductive sheet or a conductive film.

[0015] In one embodiment, the first conductive element is disposed in the buffer element, and the second conductive element is disposed on the surface of the buffer element; or,

[0016] The first conductive member and the second conductive member are disposed on two opposite surfaces of the buffer member; or,

[0017] The first conductive member and the second conductive member are spaced apart and arranged in the buffer member.

[0018] In one embodiment, the collision monitoring device further comprises a third conductive member and a third monitoring position, wherein the third monitoring position is electrically connected to the third conductive member so that the monitor can monitor the third conductive member;

[0019] The buffer comprises a first buffer and a second buffer stacked on each other, the first conductive member is sandwiched between the first buffer and the second buffer, the second conductive member is arranged on a side of the first buffer away from the first conductive member, the third conductive member is arranged on a side of the second buffer away from the first conductive member, and the thickness of the first buffer is not equal to the thickness of the second buffer, or the first buffer and the second buffer are made of different materials.

[0020] In one embodiment, there are multiple first conductive members, each of which extends back and forth along the first direction and is arranged at intervals along the second direction, and each of which is electrically connected to the first monitoring position;

[0021] There are multiple second conductive members, each of which extends back and forth along the first direction and is arranged at intervals along the second direction. Each of the second conductive members is electrically connected to the second monitoring position, and the first direction and the second direction are arranged at an angle.

[0022] In one embodiment, the first monitoring position is electrically connected to the plurality of the first conductive members via a first conductive wire, and the plurality of the first conductive members are connected in parallel to the first conductive wire;

[0023] The second monitoring position is electrically connected to a plurality of the second conductive elements through a second conductive wire, and the plurality of the second conductive elements are connected in parallel to the second conductive wire.

[0024] The utility model further provides a battery pack, comprising the collision monitoring device as described above, which is arranged in the battery pack and is located at a side of the battery pack facing the ground.

[0025] In one embodiment, the battery pack includes a shell and a battery module disposed in the shell, and the collision monitoring device is disposed between the battery module and the bottom of the shell.

[0026] The utility model also provides a car, comprising the battery pack as described above.

[0027] The technical solution of the utility model is to set a collision monitoring device on the battery pack. The collision monitoring device includes a buffer. The buffer is set on the battery pack and is located on the side of the battery pack facing the ground. It can not only provide a buffering effect for the battery pack when encountering an external impact, but also provide for the installation of the first conductive member and the second conductive member. The first conductive member is laid on the buffer, and the first monitoring position is electrically connected to the first conductive member, so that the monitor can monitor the first conductive member, so that the operator can monitor the voltage or current changes at the first monitoring position through the monitor, and then monitor the voltage or current changes on the first conductive member. The second conductive member is laid on the buffer, and the second monitoring position is electrically connected to the second conductive member, so that the monitor can monitor the second conductive member, and the operator can monitor the voltage or current changes at the second monitoring position through the monitor, and then monitor the voltage or current changes on the second conductive member.

[0028] The second conductive member is spaced apart from the first conductive member along the thickness direction of the buffer member, and is at least partially overlapped along the thickness direction of the buffer member; in a normal state (the battery pack is not impacted), the first conductive member and the second conductive member are independent of each other and are not electrically connected, and the voltage and current of the first monitoring position and the second monitoring position monitored by the monitor are constant and do not change. When the battery pack is impacted, the buffer member is squeezed. If the impact force is small, the distance between the first conductive member and the second conductive member may become shorter until contact occurs, and the first conductive member and the second conductive member are electrically connected, which will inevitably cause the voltage and / or current of the first monitoring position and / or the second monitoring position monitored by the monitor to change. At this time, the monitor can determine that it is a low-energy impact; if the impact force is large, the buffer member may be damaged, and then the first conductive member and / or the second conductive member may be damaged, resulting in a circuit break, causing the voltage and current of the first monitoring position and / or the second monitoring position monitored by the monitor to disappear. At this time, the monitor can determine that it is a high-energy impact, thereby facilitating the monitor to monitor the impact received by the battery pack and improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of an embodiment of a collision monitoring device provided by the utility model;

[0031] Figure 2 for Figure 1 A schematic diagram of the assembly structure of the first conductive member and the buffer member;

[0032] Figure 3 for Figure 1 A partial cross-sectional view of a collision monitoring device in FIG.

[0033] Figure 4 A partial cross-sectional view of another embodiment of the collision monitoring device provided by the utility model.

[0034] Description of Figure Numbers:

[0035] 100. Collision monitoring device; 1. Buffer; 11. First buffer; 12. Second buffer;

[0036] 2. first conductive member; 21. first monitoring position; 22. conductive protrusion; 23. first energized wire;

[0037] 3. second conductive member; 31. second monitoring position; 32. second energized conductor;

[0038] 4. The third conductive member.

[0039] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0043] The utility model provides a collision monitoring device 100, which is used for a battery pack. The battery pack is often installed at the bottom of a car and serves as a power battery of the car.

[0044] See also Figures 1 to 4 In one embodiment of the present utility model, the collision monitoring device 100 includes:

[0045] A buffer 1 is provided on the battery pack and is located on a side of the battery pack facing the ground;

[0046] a first conductive member 2 and a first monitoring position 21, wherein the first conductive member 2 is laid on the buffer member 1, and the first monitoring position 21 is electrically connected to the first conductive member 2, so that the monitor can monitor the first conductive member 2; and

[0047] The second conductive member 3 and the second monitoring position 31, the second conductive member 3 is laid on the buffer member 1, the second monitoring position 31 is electrically connected to the second conductive member 3, so that the monitor can monitor the second conductive member 3, and the second conductive member 3 and the first conductive member 2 are arranged at intervals along the thickness direction of the buffer member 1, and at least partially overlap along the thickness direction of the buffer member 1;

[0048] When the battery pack is impacted, the buffer member 1 is squeezed to electrically connect the first conductive member 2 and the second conductive member 3 , or to disconnect the first conductive member 2 and / or the second conductive member 3 .

[0049] Specifically, the buffer 1 can be arranged on the inner side of the bottom of the battery pack, or on the outer side of the bottom of the battery pack, which can not only provide a buffering effect when the battery pack encounters an external impact, but also provide for the installation of the first conductive member 2 and the second conductive member 3. The first conductive member 2 is laid on the buffer 1, that is, the first conductive member 2 is configured as a long strip structure with a length greater than the width, and the bending disk is arranged on the buffer 1 to cover the buffer 1, or the first conductive member 2 is configured as a sheet structure to be laid on the buffer 1. The first monitoring position 21 is electrically connected to the first conductive member 2, and the operator monitors the voltage or current changes at the first monitoring position 21 through the monitor, and then monitors the voltage or current changes on the first conductive member 2. Therefore, the first monitoring position 21 is electrically connected to the output end of the first conductive member 2 through a conductive material such as a wire or a conductive member, and can also be directly arranged on the first conductive member 2, that is, the monitor is directly connected to the first conductive member 2.

[0050] The second conductive member 3 is laid on the buffer member 1, that is, the second conductive member 3 is configured as a long strip structure with a length greater than a width, and the bending plate is arranged on the buffer member 1 to cover the buffer member 1, or the second conductive member 3 is configured as a sheet structure to be laid on the buffer member 1. The second monitoring position 31 is electrically connected to the second conductive member 3, and the operator monitors the voltage or current change at the second monitoring position 31 through the monitor, and then monitors the voltage or current change on the second conductive member 3. Therefore, the second monitoring position 31 is electrically connected to the output end of the second conductive member 3 through a conductive material such as a wire or a conductive member, and can also be directly arranged on the second conductive member 3, that is, the monitor is directly connected to the second conductive member 3.

[0051] The second conductive member 3 and the first conductive member 2 are spaced apart in the thickness direction of the buffer member 1, that is, in the normal state (the battery pack is not impacted), the first conductive member 2 and the second conductive member 3 are independent of each other and are not electrically connected. The voltage and current of the first monitoring position 21 and the second monitoring position 31 detected by the monitor are constant and do not change. When the battery pack is impacted, the buffer member 1 is squeezed. If the impact force is small, the distance between the first conductive member 2 and the second conductive member 3 may be shortened until contact occurs. The first conductive member 2 and the second conductive member 3 are electrically connected, which will inevitably cause the voltage and / or current of the first monitoring position 21 and / or the second monitoring position 31 detected by the monitor to change. At this time, the monitor can determine that it is a low-energy impact; if the impact force is large, the buffer member 1 may be damaged, and then the first conductive member 2 and / or the second conductive member 3 may be damaged, resulting in a circuit break, causing the voltage and current of the first monitoring position 21 and / or the second monitoring position 31 detected by the monitor to disappear. At this time, the monitor can determine that it is a high-energy impact. Therefore, the first conductive member 2 and the second conductive member 3 are at least partially overlapped in the thickness direction of the buffer member 1, thereby ensuring that the first conductive member 2 and the second conductive member 3 can contact each other during low-energy impact.

[0052] The thickness direction of the buffer 1 is the thickness direction of the battery pack, that is, the height direction of the car. In order to ensure that the first conductive member 2 and the second conductive member 3 can contact smoothly under the extrusion of the buffer 1, in one embodiment, the buffer 1 is provided with a plurality of avoidance holes, which are arranged between the first conductive member 2 and the second conductive member 3, so as to avoid contact between the first conductive member 2 and the second conductive member 3.

[0053] In the embodiment of the present utility model, a plurality of conductive protrusions 22 are provided at intervals on the first conductive member 2;

[0054] When the battery pack is impacted, the conductive protrusion 22 passes through the buffer member 1 and abuts against the second conductive member 3 , so that the first conductive member 2 and the second conductive member 3 are electrically connected.

[0055] Specifically, the conductive protrusion 22 is at least arranged toward the second conductive member 3 , so that under the extrusion of the buffer member 1 , the conductive protrusion 22 can pierce the buffer member 1 and directly contact the second conductive member 3 to facilitate the electrical connection between the first conductive member 2 and the second conductive member 3 .

[0056] Furthermore, the end of the conductive protrusion 22 away from the first conductive member 2 is set in a pointed shape, thereby further facilitating the conductive protrusion 22 to pierce the buffer member 1 and directly contact the second conductive member 3 to facilitate the electrical connection between the first conductive member 2 and the second conductive member 3, and the pointed setting can increase the friction force when the conductive protrusion 22 contacts the second conductive member, thereby ensuring stable contact between the first conductive member 2 and the second conductive member 3.

[0057] In the embodiment of the utility model, the outer periphery of the first conductive member 2 is provided with an insulating sleeve, and the insulating sleeve has a plurality of exposed portions that expose the first conductive member 2. That is, the first conductive member 2 can be configured as a wire structure, and a plurality of exposed portions are provided on the wire structure, so that the conductive material in the wire structure is exposed, thereby facilitating the conductive connection between the first conductive member 2 and the second conductive member 3, and the conductive protrusion 22 can be correspondingly provided at the exposed portion. Of course, in other embodiments, the first conductive member 2 is configured as a conductive sheet or a conductive film.

[0058] Preferably, if the first conductive member 2 can be configured as a wire structure, the second conductive member 3 can be configured as a conductive sheet or a conductive film, it is convenient for arranging the first conductive member 2 and the second conductive member 3 and for electrically connecting the first conductive member 2 and the second conductive member 3 .

[0059] Correspondingly, if the first conductive member 2 is configured as a conductive sheet or a conductive film, an insulating sleeve is provided on the outer periphery of the second conductive member 3 , and the insulating sleeve has a plurality of exposed portions that expose the second conductive member 3 .

[0060] See also Figures 1 to 3In an embodiment of the utility model, the first conductive member 2 is disposed in the buffer member 1, and the second conductive member 3 is disposed on the surface of the buffer member 1, thereby facilitating the installation of the second conductive member 3 and ensuring the fixing stability of the first conductive member 2.

[0061] In another embodiment of the present invention, the first conductive member 2 and the second conductive member 3 are disposed on two opposite surfaces of the buffer member 1, thereby facilitating the arrangement of the first conductive member 2 and the second conductive member 3.

[0062] In another embodiment of the present invention, the first conductive member 2 and the second conductive member 3 are arranged at intervals in the buffer member 1, thereby ensuring the fixing stability of the first conductive member 2 and the second conductive member 3. That is, in this solution, the fixing position and method of the first conductive member 2 and the second conductive member 3 on the buffer member 1 are not limited, as long as they can be arranged at intervals along the thickness direction of the buffer member 1, they are within the protection scope of this solution.

[0063] See also Figure 4 In an embodiment of the present utility model, the collision monitoring device 100 further includes a third conductive member 4 and a third monitoring position, and the third monitoring position and the third conductive member 4 are electrically connected so that the monitor can monitor the third conductive member 4;

[0064] The buffer 1 includes a first buffer 111 and a second buffer 121 stacked on each other, the first conductive member 2 is sandwiched between the first buffer 111 and the second buffer 121, the second conductive member 3 is arranged on the side of the first buffer 111 away from the first conductive member 2, the third conductive member 4 is arranged on the side of the second buffer 121 away from the first conductive member 2, and the thickness of the first buffer 111 is not equal to the thickness of the second buffer 121, or the first buffer 111 and the second buffer are made of different materials.

[0065] Specifically, the first buffer 111 and the second buffer 121 are stacked on each other, and the first conductive member 2 is sandwiched between the two, so as to facilitate the installation of the first conductive member 2. The second conductive member 3 and the third conductive member 4 are arranged on opposite sides of the first conductive member 2. When the first buffer 111 and the second buffer 121 are squeezed, the second conductive member 3 and the third conductive member 4 contact the first conductive member 2 respectively, and because the thickness of the first buffer 111 is not equal to the thickness of the second buffer 121, that is, the distance from the second conductive member 3 to the first conductive member 2 is not equal to the distance from the third conductive member 4 to the first conductive member 2, or the first buffer 111 and the second buffer are made of different materials (that is, the hardness of the two is different), a time difference is generated when the second conductive member 3 and the third conductive member 4 contact the first conductive member 2 respectively, and the impact speed of the impact load on the battery pack can be calculated accordingly, and then the impact strength can be obtained.

[0066] In other embodiments, the second conductive member 3 is disposed in the first buffer member 111, and the third conductive member 4 is disposed in the second buffer member 121. At this time, if the material of the first buffer member 111 is the same as the material of the second buffer member 121, the distance from the second conductive member 3 to the first conductive member 2 is not equal to the distance from the third conductive member 4 to the first conductive member 2, so that a time difference is generated when the second conductive member 3 and the third conductive member 4 respectively contact the first conductive member 2.

[0067] Taking the case where the thickness of the first buffer component 111 is not equal to the thickness of the second buffer component 121 as an example, the time difference generated when the second conductive component 3 and the third conductive component 4 respectively contact the first conductive component 2 is △t, and the thickness difference between the first buffer component 111 and the second buffer component 121 is △d, and the impact speed of the impact load on the battery pack is obtained to be △v=△d / △t.

[0068] The third conductive member 4 is laid on the second buffer member 121, that is, the third conductive member 4 is configured as a long strip structure with a length greater than a width, and the bending plate is arranged on the second buffer member 121 to cover the second buffer member 121, or the third conductive member 4 is configured as a sheet structure to be laid on the second buffer member 121. The third monitoring position is electrically connected to the third conductive member 4, and the operator monitors the voltage or current change at the third monitoring position through the monitor, and then monitors the voltage or current change on the third conductive member 4. Therefore, the third monitoring position is electrically connected to the output end of the third conductive member 4 through a conductive material such as a wire or a conductive member, and can also be directly arranged on the third conductive member 4, that is, the monitor is directly connected to the third conductive member 4.

[0069] See also Figure 1 and Figure 2 In an embodiment of the utility model, there are multiple first conductive members 2, and the multiple first conductive members 2 extend back and forth along the first direction and are arranged at intervals along the second direction. The multiple first conductive members 2 are electrically connected to the first monitoring position 21, and the first direction and the second direction are set at an angle.

[0070] Specifically, if Figure 1 and Figure 2 As shown, the first direction is the direction indicated by the arrow X, and the second direction is the direction indicated by the arrow Y. The plurality of first conductive members 2 extend back and forth along the first direction, thereby covering the buffer member 1 along the first direction X, and the plurality of first conductive members 2 are arranged at intervals along the second direction, thereby covering the buffer member 1 along the second direction Y. Therefore, no matter any position of the buffer member 1 is squeezed, the voltage or current of the first monitoring position 21 can be triggered to change. In other embodiments, only one first conductive member 2 may be provided, and in this case, the first conductive member 2 extends back and forth along the first direction and is arranged in the second direction.

[0071] And the buffer 1 may be provided with only one first monitoring position 21, so as to facilitate monitoring, in which case multiple first conductive members 2 may be connected in parallel or in series with the first monitoring position 21. In other embodiments, the buffer 1 may also be provided with multiple first monitoring positions 21, in which case multiple first conductive members 2 may be connected in parallel or in series, or multiple first conductive members 2 may be provided independently of each other, and in which case any one of the multiple first monitoring positions 21 generates a current or voltage change, and it can be determined that the battery pack is impacted.

[0072] When multiple first conductive members 2 are connected in parallel with the first monitoring position 21, in the embodiment of the present utility model, the first monitoring position 21 is electrically connected to the multiple first conductive members 2 through the first energized wire 23, and the multiple first conductive members 2 are connected in parallel with the first energized wire 23. This facilitates the electrical connection between the multiple first conductive members 2 and the first monitoring position 21, and in this design form, when the battery pack is subjected to an impact load and needs to be repaired, the user can determine the impact position of the impact load according to the disconnection position of the first conductive member 2, thereby facilitating the repair.

[0073] See also Figure 1 and Figure 2 In another embodiment of the utility model, the number of the second conductive members 3 is multiple, and the multiple second conductive members 3 extend back and forth along the first direction and are arranged at intervals along the second direction, and the multiple second conductive members 3 are electrically connected to the second monitoring position 31, and the first direction and the second direction are set at an angle.

[0074] Specifically, if Figure 1 and Figure 2 As shown, the plurality of second conductive members 3 extend back and forth along the first direction, thereby covering the buffer member 1 along the first direction X, and the plurality of second conductive members 3 are arranged at intervals along the second direction, thereby covering the buffer member 1 along the second direction Y, so that no matter which position of the buffer member 1 is squeezed, the voltage or current of the second monitoring position 31 can be triggered to change. In other embodiments, only one second conductive member 3 may be provided, in which case the second conductive member 3 extends back and forth along the first direction and is arranged in the second direction.

[0075] And the buffer 1 may be provided with only one second monitoring position 31, so as to facilitate monitoring, in which case multiple second conductive members 3 may be connected in parallel or in series with the second monitoring position 31. In other embodiments, the buffer 1 may also be provided with multiple second monitoring positions 31, in which case multiple second conductive members 3 may be connected in parallel or in series, or multiple second conductive members 3 may be provided independently of each other, and in which case any one of the multiple second monitoring positions 31 generates a current or voltage change, and it can be determined that the battery pack is impacted.

[0076] When multiple second conductive members 3 are connected in parallel with the second monitoring position 31, in the embodiment of the utility model, the second monitoring position 31 is electrically connected to the multiple second conductive members 3 through the second energized wire 32, and the multiple second conductive members 3 are connected in parallel with the second energized wire 32. This facilitates the electrical connection between the multiple second conductive members 3 and the second monitoring position 31, and in this design form, when the battery pack is subjected to an impact load and needs to be repaired, the user can determine the impact position of the impact load according to the disconnection position of the second conductive member 3, thereby facilitating the repair.

[0077] The utility model also proposes a battery pack, which includes a collision monitoring device 100. The specific structure of the collision monitoring device 100 refers to the above-mentioned embodiment. Since the battery pack adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, it is arranged in the battery pack and is located on the side of the battery pack facing the ground. That is, the collision monitoring device 100 can be arranged on the inner side of the bottom of the battery pack, or on the outer side of the bottom of the battery pack, such as being arranged to fit the outer surface of the bottom of the shell.

[0078] In an embodiment of the utility model, the battery pack includes a shell, and a battery module disposed in the shell, and the collision monitoring device 100 is disposed between the battery module and the bottom of the shell. That is, the collision monitoring device 100 is disposed inside the battery pack and between the battery module and the bottom of the shell, so that the electrical connection of the collision monitoring device 100 is convenient and the structural integrity of the battery pack is improved. To a certain extent, the accuracy of the collision monitoring device 100 can also be improved. For example, when the bottom of the shell is only slightly scratched (the strength is not enough to deform the battery shell), and the normal function of the battery pack is not affected, if the collision monitoring device 100 is disposed in the battery pack, the collision monitoring device 100 is not impacted and no warning is issued. If the collision monitoring device 100 is disposed outside the battery pack, the collision monitoring device 100 may be impacted, causing it to issue a false warning.

[0079] When the collision monitoring device 100 is disposed on the outer side of the bottom of the battery pack, the collision monitoring device 100 can be disposed in contact with the outer surface of the bottom of the shell.

[0080] The utility model also proposes a car, which includes a battery pack. The specific structure of the battery pack refers to the above-mentioned embodiment. Since the car adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0081] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A collision monitoring device for a battery pack, characterized in that: The collision monitoring device comprises: A buffer member, provided on the battery pack and located on a side of the battery pack facing the ground; a first conductive member and a first monitoring position, wherein the first conductive member is laid on the buffer member, and the first monitoring position is electrically connected to the first conductive member so that a monitor can monitor the first conductive member; and a second conductive member and a second monitoring position, wherein the second conductive member is laid on the buffer member, the second monitoring position is electrically connected to the second conductive member so that a monitor can monitor the second conductive member, and the second conductive member and the first conductive member are spaced apart from each other along a thickness direction of the buffer member and at least partially overlap each other along the thickness direction of the buffer member; When the battery pack is impacted, the buffer is squeezed so that the first conductive member and the second conductive member are electrically connected, or the first conductive member and / or the second conductive member are disconnected.

2. The collision monitoring device according to claim 1, characterized in that: A plurality of conductive protrusions are arranged at intervals on the first conductive member; When the battery pack is impacted, the conductive protrusion passes through the buffer and abuts against the second conductive member, so that the first conductive member and the second conductive member are electrically connected.

3. The collision monitoring device according to claim 2, characterized in that: The conductive protrusion has an end away from the first conductive member and is arranged in a pointed shape.

4. The collision monitoring device according to claim 1, characterized in that: An insulating sleeve is provided on the outer periphery of the first conductive member, and the insulating sleeve has a plurality of exposed portions that expose the first conductive member.

5. The collision monitoring device according to claim 1, characterized in that: The second conductive member is configured as a conductive sheet or a conductive film.

6. The collision monitoring device according to claim 1, characterized in that: The first conductive member is disposed in the buffer member, and the second conductive member is disposed on a surface of the buffer member; or, The first conductive member and the second conductive member are disposed on two opposite surfaces of the buffer member; or, The first conductive member and the second conductive member are spaced apart and arranged in the buffer member.

7. The collision monitoring device according to claim 1, characterized in that: The collision monitoring device further comprises a third conductive member and a third monitoring position, wherein the third monitoring position is electrically connected to the third conductive member so that the monitor can monitor the third conductive member; The buffer comprises a first buffer and a second buffer stacked on each other, the first conductive member is sandwiched between the first buffer and the second buffer, the second conductive member is arranged on a side of the first buffer away from the first conductive member, the third conductive member is arranged on a side of the second buffer away from the first conductive member, and the thickness of the first buffer is not equal to the thickness of the second buffer, or the first buffer and the second buffer are made of different materials.

8. The collision monitoring device according to any one of claims 1 to 7, characterized in that: There are multiple first conductive members, each of which reciprocates along the first direction and is arranged at intervals along the second direction, and each of which is electrically connected to the first monitoring position; There are multiple second conductive members, each of which extends back and forth along the first direction and is arranged at intervals along the second direction. Each of the second conductive members is electrically connected to the second monitoring position, and the first direction and the second direction are arranged at an angle.

9. The collision monitoring device according to claim 8, characterized in that: The first monitoring position is electrically connected to the plurality of the first conductive members through a first conductive wire, and the plurality of the first conductive members are connected in parallel to the first conductive wire; The second monitoring position is electrically connected to a plurality of the second conductive elements through a second conductive wire, and the plurality of the second conductive elements are connected in parallel to the second conductive wire.

10. A battery pack, characterized in that: It comprises a collision monitoring device as claimed in any one of claims 1 to 9, which is arranged on the battery pack and located on the side of the battery pack facing the ground.

11. The battery pack according to claim 10, characterized in that: The battery pack includes a shell and a battery module arranged in the shell, and the collision monitoring device is arranged between the battery module and the bottom of the shell.

12. A car, characterized in that: Comprising a battery pack as claimed in claim 10 or 11.

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