Collision detection device and battery pack
By designing a collision detection device with deformable signal triggers and signal contactors, the problem of collision detection in the absence of disassembly of the battery pack was solved, enabling reliable detection and early warning of internal collisions in the battery pack and improving battery safety.
Patent Information
- Application Number
- CN202423154081.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Existing technologies make it difficult to reliably detect loosening and damage to internal battery solder joints caused by collisions without disassembling the battery, making it difficult to provide early warning of potential safety hazards.
Design a collision detection device, including a signal trigger and a signal contactor. The signal trigger is made of a deformable material. When the force is less than a set value, there is a gap between it and the signal contactor. When the force is greater than the set value, the deformable contact forms a circuit to generate an electrical signal. The collision is detected by the contact between the signal contactor and the signal trigger.
It enables reliable collision detection within the battery pack, provides a basis for collision analysis, improves battery safety, and avoids safety hazards caused by collisions.
Smart Images
Figure CN223728818U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field, specifically, a kind of collision detection device and battery pack. BACKGROUND
[0002] With the development of electric power technology, battery is widely used in various power fields, which leads to more and more complex working conditions of battery. In the process of battery application, collision is one of the important factors affecting the safety of battery use. Collision not only causes the deformation of the whole battery pack, but also causes the internal cell to fire, and may cause the loosening and damage of internal welding points or other components. Therefore, how to detect the collision of the battery is a problem to be studied. SUMMARY
[0003] The utility model aims to provide a kind of collision detection device and battery pack, which can reliably detect whether the battery collides.
[0004] The embodiments of the utility model can be implemented as follows:
[0005] In the first aspect, the embodiments of the utility model provide a kind of collision detection device, including signal trigger and signal contactor;
[0006] The signal contactor is arranged around the signal trigger, and the signal trigger is made of a deformable material;
[0007] In the case where the stress is less than the set value, there is a gap between the signal contactor and the signal trigger, forming an open circuit. In the case where the stress is greater than the set value, the signal trigger deforms under stress, contacts the signal contactor, forms a loop, and generates an electrical signal.
[0008] In the optional implementation, the signal contactor is divided into multiple contact areas, and each contact area is insulated from each other. In the case where the signal trigger deforms under stress and contacts at least one contact area of the signal contactor, a loop is formed, and an electrical signal corresponding to the contact area is generated.
[0009] In the optional implementation, the signal contactor includes multiple contact plates, and each contact plate is insulated from each other.
[0010] The signal trigger is arranged in the space formed by the contact plates, and the side of the contact plate facing the signal trigger is a metal foil. The top of the signal trigger is a metal contact.
[0011] The metal foil and the metal contact are connected to wires below, respectively. In the case where the metal contact contacts the metal foil, the wires connected to the metal foil and the metal contact form a loop, generating an electrical signal.
[0012] In an optional implementation, the signal trigger is a rod structure, and the rod structure comprises a contact head and a rod body;
[0013] The rod body is made of a deformable material, the contact head is arranged at the top of the rod body, and in the case that the force is greater than the set value, the rod body of the signal trigger is deformed under the force, the contact head is driven to contact the signal contactor, a loop is formed, and an electric signal is generated.
[0014] In an optional implementation, the contact head is a plurality of contact heads, and the plurality of contact heads are arranged at the top of the rod body in sequence.
[0015] In an optional implementation, the signal contactor surrounds a region with a circular cross section, the signal trigger is arranged at the center of the region surrounded by the signal contactor, and the distance from the signal trigger to the signal contactor is equal on the periphery of the signal trigger.
[0016] In an optional implementation, the signal contactor surrounds a region with an irregular cross section, the signal trigger is arranged in the region surrounded by the signal contactor, and the distance from the signal trigger to the signal contactor is different on the periphery of the signal trigger.
[0017] In an optional implementation, the collision detection device further comprises a processor in communication with the loop in which the signal trigger and the signal contactor are located, and the processor is configured to record the electric signal.
[0018] In a second aspect, the embodiments of the utility model provide a battery pack comprising the collision detection device.
[0019] In an optional implementation, the collision detection device is installed in the battery pack at a position adjacent to a BMS acquisition module.
[0020] The collision detection device and the battery pack provided by the embodiments of the utility model have the following beneficial effects: the collision detection device comprising a signal trigger and a signal contactor is designed ingeniously, the signal trigger is made of a deformable material, the signal contactor is arranged around the signal trigger, and in a normal state (without force or with small force), there is a gap between the signal contactor and the signal trigger, and an open circuit is formed. In the case of collision (with large force), the signal trigger is deformed under the force, contacts the signal contactor, forms a loop, and generates an electric signal, so that whether the collision occurs can be determined based on whether the electric signal is generated, and reliable detection of the collision is achieved.
[0021] Further, by installing the collision detection device in the battery pack, without disassembling the battery pack, whether the battery pack collides can be accurately known based on the electric signal generation, thereby providing an analysis basis for the use safety of the battery pack. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0023] Figure 1 The structure schematic diagram of the collision detection device from a first perspective is provided for the embodiment.
[0024] Figure 2 The circuit architecture schematic diagram of the collision detection device is provided for the embodiment.
[0025] Figure 3 The structure schematic diagram of the collision detection device from a second perspective is provided for the embodiment.
[0026] Figure 4 The structure schematic diagram of the battery pack from a first perspective after assembling the collision detection device is provided for the embodiment.
[0027] Figure 5 The structure schematic diagram of the battery pack from a second perspective after assembling the collision detection device is provided for the embodiment.
[0028] Legend: 10-collision detection device; 11-signal trigger; 12-signal contactor; 121-contact plate; 20-battery pack. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.
[0031] It should be noted that like reference numerals and letters refer to like items in the several views, and that no further definitions and explanations of the items are needed in the subsequent drawings once the items are defined in one drawing.
[0032] In the description of the utility model, it needs to be explained that if the terms such as 'upper', 'lower', 'inner', 'outer' and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly used when the utility model product is used, it is only for the convenience of describing the utility model and simplifying the description, and it does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0033] In addition, if the terms 'first','second' and the like are used only for differentiation in description, they cannot be understood as indicating or implying relative importance.
[0034] It needs to be explained that the features in the embodiments of the utility model can be combined with each other without conflict.
[0035] In order to improve the safety of battery application and avoid safety hazards caused by collision, timely feedback and early warning are needed when the battery faces various collisions. It is relatively easy to detect and warn the overall deformation of the battery pack caused by collision, such as relatively obvious deformation, however, it is relatively difficult to detect and warn the loosening and damage of internal welding points or other components caused by collision, which is often difficult to be detected and identified without disassembling the battery, thereby randomly causing accidents in the long-term use of the battery.
[0036] Therefore, reliable collision detection and alarm for battery collision are particularly important to provide analysis basis for relevant processing strategies and to ensure the safety of battery use. Based on this, the embodiment provides a collision detection device and a battery pack, and the collision detection device is built into the battery pack and can realize reliable detection of the collision condition.
[0037] As shown in FIG. 1, a structure schematic diagram of a collision detection device 10 is provided, and the collision detection device 10 includes a signal trigger 11 and a signal contactor 12. Figure 1 The signal contactor 12 is arranged around the signal trigger 11, and the signal trigger 11 is made of a deformable material.
[0038] In the case where the stress is less than the set value, there is a gap between the signal contactor 12 and the signal trigger 11, forming an open circuit. In the case where the stress is greater than the set value, the signal trigger 11 is deformed by the stress, contacts the signal contactor 12, forms a loop, and generates an electrical signal.
[0039] Based on the collision detection device 10 with the above structure, whether a collision occurs can be determined according to whether an electric signal is generated. By installing the collision detection device 10 in the battery pack 20, whether a force occurs inside the battery pack 20 can be determined based on whether an electric signal is generated, and collision detection can be reliably achieved.
[0040] The implementation structure of the signal trigger 11 can be flexibly set as long as it can be deformed when a force occurs due to a collision, contact the signal contact 12 to form a loop, and generate an electric signal.
[0041] For example, the signal trigger 11 can be a rod-shaped structure including a contact and a rod body. The rod body is made of a deformable material, and the contact is arranged at the top of the rod body. When the force is greater than the set value, the rod body of the signal trigger 11 is deformed due to the force, drives the contact to contact the signal contact 12, forms a loop, and generates an electric signal.
[0042] The contact and the rod body can be in a one-to-one relationship, such as one contact arranged at the top of one rod body. They can also be in a many-to-one relationship, such as multiple contacts arranged at the top of the rod body in sequence. They can also be in a many-to-many relationship, such as multiple rod bodies and multiple contacts, and each contact is arranged on a rod body.
[0043] The rod body can be cylindrical or irregularly shaped with central symmetry. The contact can be a standard sphere, a sphere with smooth concave and convex surfaces and central symmetry, or a sheet-shaped structure with a smooth arc-shaped outer edge.
[0044] Based on the above signal trigger 11, the signal contact 12 can be flexibly set as long as it can form a loop and generate an electric signal when the signal trigger 11 is deformed and contacts the signal contact 12.
[0045] For example, the side of the signal contact 12 facing the signal trigger 11 can be provided with a conductive layer, or the signal contact 12 can be made of a conductive material, so that the signal trigger 11 and the signal contact 12 can form a loop and generate an electric signal when they contact each other at any position.
[0046] For example, in order to facilitate subsequent analysis of the force direction, the signal contact 12 can be divided into regions or designed in a split type, so that the force direction can be determined based on the specific region or position of the signal contact 12 contacted by the signal trigger 11.
[0047] In one implementation, the signal contactor 12 can be divided into multiple contact areas, each of which is insulated from each other. When the signal trigger 11 is deformed by force and contacts at least one contact area of the signal contactor 12, a loop is formed and an electrical signal corresponding to the contact area is generated.
[0048] In another implementation, the signal contactor 12 can include multiple contact plates 121, each of which is insulated from each other. The signal trigger 11 is arranged in the space formed around each of the contact plates 121. The side of the contact plate 121 facing the signal trigger 11 is a metal foil, and the top of the signal trigger 11 is a metal contact. The metal foil and the metal contact are respectively connected to wires below them. When the metal contact and the metal foil are in contact, the wires connected to the metal contact and the metal foil form a loop, generating an electrical signal.
[0049] The number of areas divided by the signal contactor 12 and the number of contact plates 121 constituting the signal trigger 11 can be flexibly selected. For example, it can be two, three, four, five, six, etc. Please refer to Figure 2 , which shows the case of four, and the corresponding circuit diagram.
[0050] Please refer to Figure 3 , which provides a collision detection device 10 including a signal trigger 11 and a signal contactor 12, and a schematic diagram of the signal contactor 12 including multiple contact plates 121. The signal trigger 11 is rod-shaped and made of a material with elasticity. The top of the signal trigger 11 is a metal contact connected to a wire below it. The contact plate 121 is divided into four parts, each of which is insulated from each other. The inner surface of the contact plate 121 is a metal foil connected to a wire below it. The contact plate 121 and the wire connected to the signal contactor 12 can form a loop, which is in an open state under normal installation conditions.
[0051] Based on the above structure, when a collision occurs, the signal trigger 11 is elastically bent due to external acceleration. The more violent the collision, the greater the acceleration, and the greater the bending angle of the signal trigger 11. When the acceleration reaches a certain threshold, the bending of the signal trigger 11 will cause the contact to contact the surrounding signal contactor 12, forming a loop when the contact is made, causing the circuit to conduct, thereby generating an electrical signal. Based on the different road electrical signals generated, the direction of the force can be determined, providing a basis for targeted collision detection.
[0052] The relative position relationship between the signal trigger 11 and the signal contactor 12 can be flexibly set based on different detection requirements. For example, in a scenario where uniform detection of force in each direction is required, the signal trigger 11 can be designed to have equal distances from each position of the signal contactor 12. For example, the cross section of the area surrounded by the signal contactor 12 is designed as a circle, and the signal trigger 11 is arranged at the center of the area surrounded by the signal contactor 12, and the distance from the signal trigger 11 to the signal contactor 12 is equal on the circumference.
[0053] Based on this structure design, by installing the collision detection device 10 in the object to be detected, the collision in each direction can be uniformly detected.
[0054] For example, in a scenario where more targeted detection of force in each direction is required, the signal trigger 11 can be designed to have different distances from each position of the signal contactor 12. For example, the cross section of the area surrounded by the signal contactor 12 is designed as an irregular shape, and the signal trigger 11 is arranged in the area surrounded by the signal contactor 12, and the distance from the signal trigger 11 to the signal contactor 12 is different on the circumference.
[0055] Based on this structure design, by installing the collision detection device 10 in the object to be detected, such as according to the importance of each area in the object to be detected, the sensitivity to collision, etc., the side of the signal contactor 12 closer or farther from the signal trigger 11 is selected to face each area of the object to be detected, so that differential detection of the collision of each area of the object to be detected can be realized.
[0056] In order to facilitate subsequent collision analysis and processing, such as early warning, the collision detection device 10 can also include a processor in communication with the circuit in which the signal trigger 11 and the signal contactor 12 are located, for recording the electrical signal. For example, the time of generating the electrical signal, the duration, the type involved (the electrical signal from which path), etc. can be stored.
[0057] Since different directions of acceleration can cause the signal trigger 11 to bend in different directions and contact different positions of the signal contactor 12, such as different contact plates 121, different contact plates 121 generate different types of electrical signals, so that the direction of the collision can be determined based on the type of the electrical signal. When the collision is more violent, multiple electrical signals or a continuous electrical signal can be generated, so that the degree of collision can be classified according to the duration and number of electrical signals.
[0058] Based on the above, Figure 4 , Figure 5 The embodiment also provides a battery pack 20 comprising the above-mentioned collision detection device 10.
[0059] In the case of assembling the collision detection device 10 in the battery pack 20, the bending amount of the signal trigger 11 can be customized according to the acceleration that the battery pack 20 can withstand, to ensure that an electric signal can be sent in time when a collision with a threat occurs, for early warning, processing, such as executing the operation of lowering the high voltage, limiting the power, etc. according to the set control strategy.
[0060] In application, the collision detection device 10 can be flexibly installed in the idle space in the battery pack 20. For example, it can be installed near the BMS (Battery Management System, battery management system) acquisition module at the head of the battery pack 20.
[0061] Based on the collision detection device and the battery pack in the embodiment, collision detection can be conveniently and reliably realized, through the ingenious design of the structure, the collision direction and intensity can be identified, which provides a basis for collision warning and processing, and improves the safety of the application of the battery pack.
[0062] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A collision detection apparatus characterized by comprising: The signal contactor surrounds the signal trigger, and the signal trigger is made of a deformable material. When the force is less than a set value, there is a gap between the signal contactor and the signal trigger, forming an open circuit; when the force is greater than the set value, the signal trigger deforms under the force, contacts the signal contactor, forms a closed circuit, and generates an electrical signal. The signal contactor is divided into multiple contact areas, and each contact area is insulated from each other; when the signal trigger deforms under the force and contacts at least one contact area of the signal contactor, a closed circuit is formed, and an electrical signal corresponding to the contact area is generated.
2. The collision detection apparatus according to claim 1, characterized by The signal contactor includes multiple contact plates, and each contact plate is insulated from each other.
3. The collision detection apparatus according to claim 1, wherein The signal trigger is arranged in a space formed by the contact plates, one side of the contact plates facing the signal trigger is a metal foil, and the top of the signal trigger is a metal contact; The metal foil and the metal contact are respectively connected to wires, and when the metal contact contacts the metal foil, the wires connected to the metal foil and the metal contact form a closed circuit, generating an electrical signal. The signal trigger is a rod-shaped structure, and the rod-shaped structure includes a contact and a rod body.
4. The collision detection apparatus according to claim 1, characterized by The rod body is made of a deformable material, and the contact is arranged at the top of the rod body; when the force is greater than the set value, the rod body of the signal trigger deforms under the force, drives the contact to contact the signal contact, forms a closed circuit, and generates an electrical signal. The contact is a plurality of contacts, and the plurality of contacts are arranged in sequence at the top of the rod body.
5. The collision detection apparatus according to claim 4, wherein The cross section of the area surrounded by the signal contactor is circular, the signal trigger is arranged at the center of the area surrounded by the signal contactor, and the distance from the periphery of the signal trigger to the signal contactor is equal.
6. The collision detection apparatus of claim 1, wherein The cross section of the area surrounded by the signal contactor is an irregular shape, the signal trigger is arranged in the area surrounded by the signal contactor, and the distance from the periphery of the signal trigger to the signal contactor is different.
7. The collision detection apparatus of claim 1, wherein The collision detection device further includes a processor in communication with the closed circuit of the signal trigger and the signal contact, for recording the electrical signal.
8. The collision detection apparatus according to any one of claims 1 to 7, characterized by The collision detection device includes the collision detection device according to any one of claims 1 to 8.
9. A battery pack, characterized by, The collision detection device is installed in the battery pack adjacent to the BMS acquisition module.
10. The battery pack of claim 9, wherein,