Battery pack unpacking detection device and battery pack

Abstract

The utility model discloses a battery pack unpacking detection device and a battery pack. The battery pack unpacking detection device comprises a first wire harness, a second wire harness and a voltage detection module, the first wire harness is connected with the first battery pack frame and the voltage detection module; the second wire harness is connected with the second battery pack frame and the voltage detection module; the voltage detection module is used for detecting the potential difference between the first battery pack frame and the second battery pack frame through the first wire harness and the second wire harness; the potential difference is used to determine whether the battery pack is unpacked.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of power batteries, and in particular to a battery pack unpacking detection device and a battery pack. Background Art

[0002] With the rapid development of the new energy vehicle industry, market competition has become fierce. Battery technology is the core competitiveness of new energy vehicles. At the same time, the safety of power battery systems for new energy vehicles has always been a focus of attention, because once the battery is subjected to unprofessional forceful dismantling by the outside world, there will be a potential risk of causing fire or explosion accidents. In addition, if users apply for warranty after private dismantling, it will cause certain economic losses to battery manufacturers.

[0003] At present, there is no low-cost and efficient means to prevent the disassembly of battery packs in passenger car power battery systems to ensure their technical and safety issues. How to avoid and monitor competitors' disassembly analysis through effective technical means to ensure the safety of core technologies is an urgent problem that every battery R&D and production company needs to solve. Utility Model Content

[0004] The utility model provides a battery pack unpacking detection device and a battery pack, so as to achieve the purpose of effectively performing battery pack unpacking detection.

[0005] In a first aspect, an embodiment of the utility model provides a battery pack unpacking detection device, comprising:

[0006] a first wiring harness, a second wiring harness, and a voltage detection module;

[0007] The first wiring harness is connected to the first battery pack frame and the voltage detection module;

[0008] The second wiring harness is connected to the second battery pack frame and the voltage detection module;

[0009] The voltage detection module is used to detect the potential difference between the first battery pack frame and the second battery pack frame through the first wiring harness and the second wiring harness;

[0010] The potential difference is used to determine whether the battery pack is unpacked.

[0011] Optionally, it also includes an energy supply module;

[0012] The energy supply module is connected to the first wiring harness, the second wiring harness, and the voltage detection module, and the energy supply module is used to provide working voltage to the first wiring harness, the second wiring harness, and the voltage detection module.

[0013] Optionally, a wireless transmission module is also included;

[0014] The energy supply module is also connected to the wireless transmission module, and the energy supply module is also used to supply power to the wireless transmission module;

[0015] The wireless transmission module is also connected to the voltage detection module, and the wireless transmission module is also used to send the potential difference.

[0016] Optionally, the wireless transmission module includes a first communication unit and a second communication unit;

[0017] The first communication unit is used to communicate with the battery management system, and the second communication unit is used to communicate with the server.

[0018] Optionally, the first wiring harness and the second wiring harness adopt one of FPC, FFC or cable.

[0019] Optionally, the first wiring harness is connected to the first battery pack frame by bolts, rivets or welding;

[0020] The second wiring harness is connected to the second battery pack frame by bolts, rivets or welding.

[0021] Optionally, the first battery pack frame and the second battery pack frame include a tray and a bottom guard plate respectively;

[0022] Or the first battery pack frame and the second battery pack frame include a battery pack upper cover and a maintenance cover respectively;

[0023] Alternatively, the first battery pack frame and the second battery pack frame include a battery pack cover and a tray respectively.

[0024] In a second aspect, an embodiment of the utility model further provides a battery pack, comprising any one of the battery pack unpacking detection devices described in the embodiments of the utility model.

[0025] Optionally, a third wiring harness and a battery management unit are also included;

[0026] The voltage detection module is connected to the battery management unit through the third wiring harness.

[0027] Optionally, the third wiring harness adopts one of FPC, FFC or cable.

[0028] Compared with the prior art, the beneficial effect of the utility model is that: the utility model proposes a battery pack anti-disassembly device, which includes a first wiring harness, a second wiring harness and a voltage detection device, and the first wiring harness and the second wiring harness are respectively connected to the first battery pack frame and the second battery pack frame, and the first battery pack frame and the second battery pack frame are arranged to be separated from the respective connected wiring harnesses after being abnormally disassembled (for example, unprofessional forceful unpacking, user's private unpacking, etc.), based on the change of the connection relationship between the wiring harness and the battery pack frame, when the battery pack is abnormally unpacked, the change of the potential difference between the first battery pack frame and the second battery pack frame can be detected by the voltage detection module, and then it can be judged whether the battery pack has been unpacked by the potential difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a battery pack unpacking detection device in the embodiment;

[0030] Figure 2 It is another battery pack unpacking detection device in the embodiment;

[0031] Figure 3 It is another battery pack unpacking detection device in the embodiment;

[0032] Figure 4 Schematic diagram of wiring harness assembly in the embodiment. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] Embodiment 1

[0035] Figure 1 The battery pack unpacking detection device in the embodiment, refer to Figure 1 , the battery pack unpacking detection device comprises:

[0036] A first wiring harness 101, a second wiring harness 102 and a voltage detection module 100;

[0037] The first wiring harness 101 is connected to the first battery pack frame 103 and the voltage detection module 100;

[0038] The second wiring harness 102 is connected to the second battery pack frame 104 and the voltage detection module 100 ;

[0039] The voltage detection module 100 is used to detect a potential difference between the first battery pack frame 103 and the second battery pack frame 104 through the first wire harness 101 and the second wire harness 102 .

[0040] In this embodiment, the first battery pack frame 103 and the second battery pack frame 104 are set to form the outer shell or frame of the battery pack;

[0041] It is assumed that the first battery pack frame 103 and the second battery pack frame 104 cannot be separated by conventional means after the battery pack leaves the factory. If the first battery pack frame 103 and the second battery pack frame 104 are separated, the first battery pack frame 103, the second battery pack frame 104 and / or the battery pack suffer irreversible damage;

[0042] For example, the first battery pack frame 103 and the second battery pack frame 104 cannot be connected (only) by a detachable method such as bolts or snaps, but may be fixedly connected by riveting, welding, or the like.

[0043] Illustratively, in this embodiment, the specific structures of the first battery pack frame 103 and the second battery pack frame 104 are not limited, and the first battery pack frame 103 and the second battery pack frame 104 should at least include conductive components.

[0044] In this embodiment, a potential difference is set to determine whether the battery pack is unpacked. The working principle of the battery pack unpacking detection device is as follows:

[0045] When the battery pack is not unpacked, the first wire harness 101 is connected to the first battery pack frame 103, and the second wire harness 102 is connected to the second battery pack frame 104. Since the first wire harness 101 and the second wire harness 102 are simultaneously connected to the voltage detection module 100, the first battery pack frame 103 and the second battery pack frame 104 are at the same potential;

[0046] When the battery pack is unpacked, if the first wire harness 101 is detached from the first battery pack frame 103, and / or the second wire harness 102 is detached from the second battery pack frame 104, the potential difference between the first battery pack frame 103 and the second battery pack frame 104 is infinite;

[0047] Based on the change of the potential difference, it can be determined whether the battery pack is unpacked. When the voltage detected by the voltage detection module 100 changes from a specified voltage to infinity, it can be determined that the battery pack is unpacked.

[0048] Illustratively, in this embodiment, the voltage detection module 100 may include a power supply for applying voltage to the first battery pack frame 103 and the second battery pack frame 104 , and the specific power supply structure is not limited and can be freely set according to requirements.

[0049] The present embodiment proposes a battery pack anti-disassembly device, which includes a first wiring harness, a second wiring harness and a voltage detection device. The first wiring harness and the second wiring harness are respectively connected to the first battery pack frame and the second battery pack frame, and the first battery pack frame and the second battery pack frame are arranged to be separated from the respectively connected wiring harnesses after being abnormally disassembled (for example, unprofessional forceful unpacking, private unpacking by users, etc.). Based on the change of the connection relationship between the wiring harness and the battery pack frame, when the battery pack is abnormally unpacked, the change of the potential difference between the first battery pack frame and the second battery pack frame can be detected by the voltage detection module, and then it can be judged whether the battery pack has been unpacked by the potential difference.

[0050] Figure 2 Another battery pack unpacking detection device in the embodiment, refer to Figure 2 ,exist Figure 1 On the basis of the scheme shown, in one possible implementation, the battery pack anti-tampering device further includes an energy supply module 105;

[0051] The energy supply module 105 is connected to the first wire harness 101 , the second wire harness 102 , and the voltage detection module 100 . The energy supply module 105 is used to provide working voltage to the first wire harness 101 , the second wire harness 102 , and the voltage detection module 100 .

[0052] In this solution, the energy supply module 105 may use a DC voltage source (e.g., a 3.3V voltage source, a 5V voltage source, etc.);

[0053] Among them, the energy supply module 105 can form a loop with the first wiring harness 101, the second wiring harness 102, the first battery pack frame 103, and the second battery pack frame 104, and the voltage detection module 100 can be connected in parallel in the above loop to detect the potential difference between the first battery pack frame 103 and the second battery pack frame 104.

[0054] refer to Figure 2 , In one possible implementation, the battery pack anti-tampering device further includes a wireless transmission module 106;

[0055] The energy supply module 105 is also connected to the wireless transmission module 106, and the energy supply module 105 is also used to supply power to the wireless transmission module 106;

[0056] The wireless transmission module 106 is also connected to the voltage detection module 100 , and the wireless transmission module 106 is also used to send the potential difference.

[0057] In this solution, a wireless transmission module 106 is configured to communicate with a server (eg, a cloud server, a cloud platform, etc.), and the wireless transmission module 106 may be a GPRS module, a 4G module, etc.

[0058] Further, based on the solution that the battery pack anti-disassembly device further includes a wireless transmission module 106, in one possible implementation scheme, the wireless transmission module includes a first communication unit and a second communication unit;

[0059] The first communication unit is used for communication connection with the battery management system, and the second communication unit is used for communication connection with the server.

[0060] In this solution, a first communication unit is configured to communicate with a battery management system (BMS), and the first communication unit may be a Bluetooth module or the like;

[0061] The second communication unit is connected to the service end for communication, and the second communication unit may adopt a GPRS module, a 4G module, etc.

[0062] In this solution, the potential difference (information) can be sent to the BMS through the first communication unit, and the vehicle-side storage of the battery pack unpacking information is realized based on the BMS;

[0063] The potential difference (information) can be sent to a remote server through the second communication unit, and cloud storage of battery pack unpacking information can be achieved based on the server, thereby forming an archive record in combination with the battery manufacturer's backend big data.

[0064] Based on any of the foregoing solutions, in one possible implementation scheme, the first wiring harness and the second wiring harness of the battery pack unpacking detection device may adopt one of FPC, FFC or cable.

[0065] Based on any of the foregoing schemes, in one possible implementation scheme, the first wiring harness is connected to the first battery pack frame by bolts, rivets or welding; the second wiring harness is connected to the second battery pack frame by bolts, rivets or welding.

[0066] Based on any of the foregoing solutions, in one possible implementation scheme, the first battery pack frame and the second battery pack frame respectively include a tray and a bottom guard plate;

[0067] Alternatively, the first battery pack frame and the second battery pack frame include a battery pack upper cover and a maintenance cover respectively;

[0068] Alternatively, the first battery pack frame and the second battery pack frame include a battery pack cover and a tray respectively.

[0069] Exemplarily, in this solution, the definitions of the battery pack upper cover, maintenance cover, tray, and bottom guard plate are the same as those in the prior art, and the specific structures of the battery pack upper cover, maintenance cover, tray, and bottom guard plate are not limited.

[0070] Figure 3 It is another battery pack unpacking detection device in the embodiment, referring to Figure 3 Based on any of the above solutions, in one possible implementation scheme, the battery pack unpacking detection device includes:

[0071] A first wiring harness 101, a second wiring harness 102, a third wiring harness 107 and a voltage detection module 100;

[0072] The first wiring harness 101 is connected to the first battery pack frame 103 and the voltage detection module 100;

[0073] The second wiring harness 102 is connected to the second battery pack frame 104 and the voltage detection module 100 ;

[0074] The third wire harness 107 is used to connect the battery management unit 200 with the first wire harness 101, the second wire harness 102, and the voltage detection module 100. The battery management unit 200 provides the first wire harness 101, the second wire harness 102, and the voltage detection module 100 with the operating voltage through the third wire harness 107.

[0075] Among them, the power output end of the battery management unit 200 can form a loop with the first wire harness 101, the second wire harness 102, the first battery pack frame 103, and the second battery pack frame 104 through the third wire harness 107, and the voltage detection module 100 can be connected in parallel in the above loop to detect the potential difference between the first battery pack frame 103 and the second battery pack frame 104;

[0076] The voltage detection module 100 is used to detect a potential difference between the first battery pack frame 103 and the second battery pack frame 104 through the first wire harness 101 and the second wire harness 102 .

[0077] Exemplarily, in this solution, the third wiring harness 107 may be one of FPC, FFC or cable.

[0078] Figure 4 is a schematic diagram of the wiring harness assembly in the embodiment, refer to Figure 4 In this solution, it can be specifically set that the first battery pack frame 103 adopts the tray 1 and the second battery pack frame 104 adopts the bottom guard plate 2.

[0079] Furthermore, in this solution, the battery pack unpacking detection device may also include a wireless transmission module, and the third wiring harness 107 may also be used to connect the wireless transmission module and the battery management unit 200, and configure the battery management unit 200 to supply power to the wireless transmission module.

[0080] Embodiment 2

[0081] This embodiment proposes a battery pack, including any one of the battery pack unpacking detection devices recorded in Embodiment 1. The implementation methods and beneficial effects of the battery pack unpacking detection device are the same as the corresponding contents recorded in Embodiment 1, and the specific contents will not be described in detail again.

[0082] As an optional solution, the battery pack is configured to include: a first wiring harness, a second wiring harness, a third wiring harness, a wireless transmission module, and a voltage detection module;

[0083] The first wiring harness is connected to the first battery pack frame and the voltage detection module;

[0084] The second wiring harness is connected to the second battery pack frame and the voltage detection module;

[0085] The third wiring harness is used to connect the battery management unit with the first wiring harness, the second wiring harness, and the voltage detection module, and the battery management unit provides working voltage to the first wiring harness, the second wiring harness, and the voltage detection module through the third wiring harness;

[0086] The third wiring harness can also be used to connect the wireless transmission module and the battery management unit, and configure the battery management unit to supply power to the wireless transmission module.

[0087] Exemplarily, in this embodiment, the third wiring harness may be one of FPC, FFC or cable.

[0088] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery pack unpacking detection device, characterized in that: include: a first wiring harness, a second wiring harness, and a voltage detection module; The first wiring harness is connected to the first battery pack frame and the voltage detection module; The second wiring harness is connected to the second battery pack frame and the voltage detection module; The voltage detection module is used to detect the potential difference between the first battery pack frame and the second battery pack frame through the first wiring harness and the second wiring harness; The potential difference is used to determine whether the battery pack is unpacked.

2. The battery pack unpacking detection device according to claim 1, characterized in that: Also included is an energy supply module; The energy supply module is connected to the first wiring harness, the second wiring harness, and the voltage detection module, and the energy supply module is used to provide working voltage to the first wiring harness, the second wiring harness, and the voltage detection module.

3. The battery pack unpacking detection device according to claim 2, characterized in that: Also includes a wireless transmission module; The energy supply module is also connected to the wireless transmission module, and the energy supply module is also used to supply power to the wireless transmission module; The wireless transmission module is also connected to the voltage detection module, and the wireless transmission module is also used to send the potential difference.

4. The battery pack unpacking detection device according to claim 3, characterized in that: The wireless transmission module includes a first communication unit and a second communication unit; The first communication unit is used to communicate with the battery management system, and the second communication unit is used to communicate with the server.

5. The battery pack unpacking detection device according to any one of claims 1 to 3, characterized in that: The first wiring harness and the second wiring harness are one of FPC, FFC or cable.

6. The battery pack unpacking detection device according to any one of claims 1 to 3, characterized in that: The first wiring harness is connected to the first battery pack frame by bolts, rivets or welding; The second wiring harness is connected to the second battery pack frame by bolts, rivets or welding.

7. The battery pack unpacking detection device according to any one of claims 1 to 3, characterized in that: The first battery pack frame and the second battery pack frame respectively include a tray and a bottom guard plate; Or the first battery pack frame and the second battery pack frame include a battery pack upper cover and a maintenance cover respectively; Alternatively, the first battery pack frame and the second battery pack frame include a battery pack cover and a tray respectively.

8. A battery pack, characterized in that: It comprises the battery pack unpacking detection device as described in any one of claims 1 to 7.

9. The battery pack according to claim 8, characterized in that: Also included are a third wiring harness, a battery management unit; The voltage detection module is connected to the battery management unit through the third wiring harness.

10. The battery pack according to claim 9, characterized in that: The third wiring harness adopts one of FPC, FFC or cable.

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