Battery pack

Abstract

The utility model provides a battery pack. The battery pack comprises a main frame, a battery cell module arranged on the main frame, and a quick-change mechanism arranged between the main frame and the battery cell module, the quick-change mechanism comprises a connecting part for connecting the battery cell module and the main frame, and a locking part and a driving part which are arranged on the main frame, and the driving part is connected with the locking part; the driving part can drive the locking part to lock the connecting part, so that the battery cell module is fixed on the main frame, or the locking of the connecting part by the locking part is released, so that the battery cell module is separated from the main frame under the action of self gravity. According to the battery pack disclosed by the utility model, the battery cell modules which are subjected to thermal runaway can be separated from the battery pack, so that fire or fire spreading on a whole vehicle is avoided, and the safety of the whole vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] At present, battery packs are one of the important components of new energy vehicles, and thermal runaway of battery packs is also an issue that people are most concerned about. The existing battery packs deal with cell fires by delaying the spread of the fire or extinguishing it inside the battery pack. However, this treatment method does not effectively isolate the fire source after the battery pack catches fire. It mainly controls or delays the flame from spreading, and the control effect is limited, resulting in weak safety of the entire pack and the entire vehicle. Utility Model Content

[0003] In view of this, the utility model aims to provide a battery pack, which is beneficial to improving the safety of the entire vehicle.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A battery pack comprises a main frame, a battery cell module arranged on the main frame, and a quick-change mechanism arranged between the main frame and the battery cell module;

[0006] The quick-change mechanism includes a connecting part connecting the battery cell module and the main frame, and a locking part and a driving part arranged on the main frame, wherein the driving part is connected to the locking part; the driving part can drive the locking part to lock the connecting part to fix the battery cell module on the main frame, or release the locking part from the connecting part to allow the battery cell module to detach from the main frame under the action of its own gravity.

[0007] Furthermore, the connecting part includes a locking rod that passes through and extends from the battery cell module and the main frame in sequence from bottom to top; the locking part includes a locking hook that is rotatably arranged on the top of the main frame, and the locking hook locks or disengages from the protruding end of the locking rod under the drive of the driving part.

[0008] Furthermore, the locking portion includes a rotating shaft arranged on the main frame, and the locking hook is arranged on the rotating shaft; the locking rod is provided with a locking groove which is concave along its own circumference close to the protruding end, and the locking hook can be hooked in the locking groove in a horizontal posture.

[0009] Furthermore, the locking hook is arranged on the rotating shaft through a sleeve, and a worm wheel spaced apart from the locking hook is provided on the sleeve, and the driving end of the driving part is connected to a worm driven by the worm wheel.

[0010] Furthermore, the driving part includes a driving bracket arranged on the main frame, and a driving motor arranged on the driving bracket, and the worm is arranged at a driving end of the driving motor.

[0011] Furthermore, the locking hook includes a main body arranged radially along the rotating shaft, and a hook provided at one end of the main body away from the rotating shaft, and the hook can be hooked in the locking groove.

[0012] Furthermore, the top surface of the hook is gradually tilted upward from the end hooked into the lock slot to the rear of the hook; the sleeve is provided with a limiter parallel to the main body and arranged at intervals, and the limiter is used to limit the top of the lock rod in the up and down directions.

[0013] Furthermore, an inclined guide limit surface is provided at the bottom of the limit member, and a limit matching surface parallel to the guide limit surface is provided at the top of the lock rod; when the hook is hooked into the lock slot, the guide limit surface and the limit matching surface can abut and slide relative to each other to limit the upward movement of the lock rod.

[0014] Furthermore, the battery cell module includes a shell having a base plate, and a plurality of battery cells, a water cooling device, a power connector and a low-voltage connector arranged in the shell, and the connecting portion passes through the base plate, the side wall of the shell and the main frame in sequence and is locked with the locking portion; the water cooling device is connected to the cooling system of the battery pack, the power connector is connected to the main power supply of the battery pack, and the low-voltage connector is connected to the collection system of the battery pack.

[0015] Furthermore, the main frame includes a frame body and a partition plate arranged in the frame body, wherein the partition plate extends in the front-to-back direction, and the partition plate divides the interior of the frame body into two installation spaces; each of the installation spaces is provided with a plurality of the battery cell modules arranged in sequence in the front-to-back direction, and the quick-change mechanism is provided on the left and right sides of each of the battery cell modules.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The battery pack described in the utility model can drive the locking part to lock the connecting part through the driving part to fix the battery cell module on the main frame, or release the locking part of the connecting part to allow the battery cell module to separate from the main frame under the action of its own weight. Therefore, when thermal runaway occurs in the battery cell module, the driving part can be controlled to make the battery cell module separate from the battery pack under the action of its own weight, thereby avoiding fire or fire spreading to the whole vehicle, thereby improving the safety of the whole vehicle.

[0018] In addition, the locking hook and the locking rod are used in a locking cooperation form, which is simple to operate and has high locking stability. The worm gear transmission form is used between the locking hook and the driving part, which can have the effect of high transmission accuracy and easy arrangement on the whole bag. The top surface of the hook is gradually tilted upward from the end hooked into the lock slot to the rear of itself, which is conducive to the hook hooking into the lock slot, and the setting of the limiter can limit the movement of the lock rod in the up and down directions to ensure the locking stability.

[0019] In addition, two installation spaces are provided, and each installation space is provided with multiple battery cell modules, and a quick-change mechanism corresponding to each battery cell module can form a design form that divides the battery cells in the battery pack into multiple battery cell modules. When a battery cell module is damaged, this battery cell module can be separated from the battery pack to avoid causing other battery cell modules to catch fire or the fire to spread to the entire battery pack. This can better control or delay the spread of flames, improve the thermal runaway control effect and safety of the entire pack, and thus improve the safety of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the battery pack according to an embodiment of the utility model;

[0022] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0024] Figure 4 This is a schematic diagram of the structure of the connecting part and the locking part in a locked state according to an embodiment of the utility model;

[0025] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0026] Description of reference numerals:

[0027] 1. Main frame; 11. Partition plate; 12. Crossbeam; 13. Control unit;

[0028] 2. quick-change mechanism; 21. connecting part; 211. locking groove; 212. limiting block; 213. limiting matching surface; 22. locking part; 221. locking hook; 2211. main body; 2212. hook; 222. rotating shaft; 223. sleeve; 2231. worm gear; 224. limiting member; 2241. guiding limiting surface; 23. driving part; 231. driving bracket; 232. driving motor; 2321. worm;

[0029] 3. Battery cell module; 31. Base plate; 32. Water cooling device; 33. Power connector; 34. Low voltage connector. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] The present embodiment relates to a battery pack, which can separate the battery cell module 3 from the battery pack when thermal runaway occurs, thereby preventing fire or fire from spreading to the entire vehicle, thereby improving the safety of the entire vehicle.

[0035] In terms of overall structure, Figures 1 to 5 As shown, the battery pack of this embodiment includes a main frame 1, a battery module 3 arranged on the main frame 1, and a quick-change mechanism 2 arranged between the main frame 1 and the battery module 3.

[0036] The quick-change mechanism 2 includes a connecting portion 21 connecting the battery module 3 and the main frame 1, and a locking portion 22 and a driving portion 23 provided on the main frame 1, wherein the driving portion 23 is drivingly connected to the locking portion 22. The driving portion 23 can drive the locking portion 22 to lock the connecting portion 21 to fix the battery module 3 on the main frame 1, or release the locking portion 22 from locking the connecting portion 21 to allow the battery module 3 to detach from the main frame 1 under its own gravity.

[0037] Specifically, in this embodiment, as an exemplary structure, combined with Figure 1 , Figure 2 and Figure 4 As shown in the figure, the connecting part 21 includes a locking rod that passes through and extends from the battery module 3 and the main frame 1 from bottom to top, and a limit block 212 is provided at the bottom of the locking rod, and the limit block 212 is used to limit the falling of the battery module 3.

[0038] At the same time, the locking part 22 includes a lock hook 221 rotatably disposed on the top of the main frame 1, and the lock hook 221 locks or disengages the extended end of the lock rod under the drive of the driving part 23. This can make the locking operation simple and achieve higher locking stability.

[0039] Furthermore, in this embodiment, as a preferred implementation form, Figure 2 As shown, the locking part 22 includes a rotating shaft 222 disposed on the main frame 1, and a locking hook 221 is disposed on the rotating shaft 222. The locking rod is provided with a locking groove 211 concave along its circumference near the protruding end, and the locking hook 221 can be hooked in the locking groove 211 in a horizontal posture.

[0040] Such a configuration is conducive to pulling the battery cell module 3 into the locking rod under the action of its own gravity, so that the locking stability between the locking hook 221 and the locking rod is higher. At the same time, it is also conducive to the battery cell module 3 being separated from the main frame 1 with the locking rod under the action of its own gravity, that is, being separated from the battery pack after the lock between the locking hook 221 and the locking rod is released.

[0041] In specific implementation, as a preferred implementation form, the lock hook 221 of this embodiment is arranged on the rotating shaft 222 through the sleeve 223, and a worm gear 2231 is arranged on the sleeve 223 and spaced apart from the lock hook 221, and the driving end of the driving part 23 is connected to the worm 2321 drivingly connected to the worm gear 2231.

[0042] It can be understood that the transmission form of the worm wheel 2231 and the worm 2321 between the locking hook 221 and the driving part 23 can have the effects of high transmission accuracy and easy arrangement on the whole package.

[0043] In addition, in this embodiment, as a preferred implementation form, continue to refer to Figure 2As shown, the driving part 23 includes a driving bracket 231 arranged on the main frame 1 and a driving motor 232 arranged on the driving bracket 231 , and the worm 2321 is arranged at the driving end of the driving motor 232 .

[0044] The advantage of such an arrangement is that the drive motor 232 and the worm 2321 can be arranged above the lock hook 221, so that the lock hook 221 can be close to the top surface of the main frame 1, which is beneficial to improve the locking stability of the lock hook 221 and the lock rod to a certain extent.

[0045] Furthermore, in this embodiment, as a preferred implementation form, the lock hook 221 includes a main body 2211 arranged radially along the rotating shaft 222 , and a hook 2212 provided at one end of the main body 2211 away from the rotating shaft 222 , and the hook 2212 can be hooked in the lock slot 211 .

[0046] Moreover, as a preferred implementation form, in this embodiment, the top surface of the hook 2212 is gradually tilted upward from the end hooked into the lock slot 211 to the rear thereof. The sleeve 223 is provided with a limiter 224 arranged parallel to the main body 2211 and spaced apart, and the limiter 224 is used to limit the top of the lock rod in the up and down direction.

[0047] Here, by gradually tilting the top surface of the hook 2212 upward from one end hooked into the lock slot 211 to the rear thereof, it is convenient for the hook 2212 to hook into the lock slot 211, and the setting of the limiter 224 can limit the movement of the lock rod in the up and down directions, thereby ensuring the locking stability.

[0048] To expand, in this embodiment, as a preferred implementation form, combined with Figure 2 and Figure 5 As shown, an inclined guiding limiting surface 2241 is provided at the bottom of the limiting member 224 , and a limiting matching surface 213 parallel to the guiding limiting surface 2241 is provided at the top of the locking rod.

[0049] When the hook 2212 is hooked into the lock slot 211, the guide limit surface 2241 and the limit matching surface 213 can abut and slide relative to each other to limit the upward movement of the lock rod. In addition, the guide limit surface 2241 and the limit matching surface 213 can also play a guiding role in guiding the direction of the lock rod.

[0050] In addition, in this embodiment, as a preferred implementation form, Figure 1 At once Figure 3 As shown, the battery module 3 includes a shell having a bottom plate 31, and a plurality of battery cells, a water cooling device 32, a power connector 33 and a low-voltage connector 34 arranged in the shell. The connecting part 21 passes through the bottom plate 31, the side wall of the shell and the main frame 1 in sequence and is locked with the locking part.

[0051] The water cooling device 32 is connected to the cooling system of the battery pack, the power connector 33 is connected to the main power supply of the battery pack, and the low-voltage connector 34 is connected to the collection system of the battery pack. This arrangement can ensure that the battery pack controls the working state of each battery module 3 as a whole while realizing the separation of a single battery module 3 from the battery pack.

[0052] In addition, in this embodiment, as a preferred implementation form, Figure 1 As shown, the main frame 1 includes a frame body and a partition plate 11 arranged in the frame body, the partition plate 11 extends in the front-to-back direction, and the partition plate 11 divides the interior of the frame body into two installation spaces. Each installation space is provided with a plurality of battery modules 3 arranged in sequence in the front-to-back direction, and each battery module 3 is provided with a quick-change mechanism 2 on both sides.

[0053] It can be understood that two installation spaces are set up, and each installation space is provided with multiple battery cell modules 3, and the quick-change mechanism 2 corresponding to each battery cell module 3 can form a design form that divides the battery cells in the battery pack into multiple battery cell modules 3. When a battery cell module 3 is damaged, this battery cell module 3 can be separated from the battery pack to avoid causing other battery cell modules 3 to catch fire or the fire to spread to the entire battery pack. In this way, the flame spillage can be better controlled or delayed, and the thermal runaway control effect and safety of the entire pack are improved, thereby improving the safety of the entire vehicle.

[0054] Moreover, in the specific implementation, the number of the battery modules 3 in this embodiment can be set and adjusted according to the actual energy density requirements of the battery pack, for example, three battery modules 3 arranged in sequence along the front-to-back direction can be specifically arranged in each installation space. At the same time, the number and arrangement of the quick-change mechanisms 2 in this embodiment can also be set and adjusted accordingly according to the actual locking requirements, for example, two quick-change mechanisms 2 are respectively arranged on both sides of each battery module 3, etc.

[0055] Furthermore, the frame body of this embodiment includes two side plates and two end plates, and a crossbeam 12 disposed inside the frame body, the two ends of the crossbeam 12 are respectively connected to the two side plates, two installation spaces are located on one side of the crossbeam 12, and an installation compartment for placing the entire control unit 13 is formed between the other side of the crossbeam 12 and the two side plates and the side end plates. In addition, the relevant structural parts not mentioned in the battery pack can refer to the existing battery pack products, and will not be repeated here.

[0056] The battery pack of this embodiment can drive the locking part 22 to lock the connecting part 21 through the driving part 23 to fix the battery cell module 3 on the main frame 1, or release the locking part 22 from the connecting part 21 to allow the battery cell module 3 to detach from the main frame 1 under the action of its own weight. Therefore, when thermal runaway occurs in the battery cell module 3, the driving part 23 can be controlled to enable the battery cell module 3 to detach from the battery pack under the action of its own weight, thereby avoiding fire or fire spreading to the entire vehicle, thereby improving the safety of the entire vehicle.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: It includes a main frame, a battery module arranged on the main frame, and a quick-change mechanism arranged between the main frame and the battery module; The quick-change mechanism includes a connecting part connecting the battery cell module and the main frame, and a locking part and a driving part arranged on the main frame, wherein the driving part is connected to the locking part; the driving part can drive the locking part to lock the connecting part to fix the battery cell module on the main frame, or release the locking part from the connecting part to allow the battery cell module to detach from the main frame under the action of its own gravity.

2. The battery pack according to claim 1, characterized in that: The connecting portion includes a locking rod that passes through and extends from the battery module and the main frame in sequence from bottom to top; The locking part comprises a locking hook rotatably arranged on the top of the main frame, and the locking hook is driven by the driving part to lock or disengage the protruding end of the locking rod.

3. The battery pack according to claim 2, characterized in that: The locking portion comprises a rotating shaft arranged on the main frame, and the locking hook is arranged on the rotating shaft; The locking rod is provided with a locking groove which is concave inwardly along its circumference and close to the protruding end, and the locking hook can be hooked in the locking groove in a horizontal posture.

4. The battery pack according to claim 3, characterized in that: The lock hook is arranged on the rotating shaft through a sleeve, and a worm wheel spaced apart from the lock hook is arranged on the sleeve, and a driving end of the driving part is connected to a worm driven by the worm wheel.

5. The battery pack according to claim 4, characterized in that: The driving part comprises a driving bracket arranged on the main frame, and a driving motor arranged on the driving bracket, and the worm is arranged at the driving end of the driving motor.

6. The battery pack according to claim 4, characterized in that: The locking hook comprises a main body arranged along the radial direction of the rotating shaft, and a hook provided at one end of the main body away from the rotating shaft, and the hook can be hooked in the locking groove.

7. The battery pack according to claim 6, characterized in that: The top surface of the hook is gradually tilted upward from the end hooked into the locking groove to the rear of the hook; The sleeve is provided with a limiting member which is parallel to the main body and arranged at intervals, and the limiting member is used to limit the top of the locking rod in the up and down directions.

8. The battery pack according to claim 7, characterized in that: The bottom of the limiter is provided with an inclined guide limit surface, and the top of the lock rod is provided with a limit matching surface parallel to the guide limit surface; When the hook is hooked into the locking groove, the guide limiting surface and the limiting matching surface can abut against and slide relatively to each other, so as to limit the locking rod from moving upward.

9. The battery pack according to claim 1, characterized in that: The battery module comprises a shell having a bottom plate, and a plurality of battery cells, a water cooling device, a power connector and a low-voltage connector arranged in the shell, and the connecting portion passes through the bottom plate, the side wall of the shell and the main frame in sequence and is locked with the locking portion; The water cooling device is connected to the cooling system of the battery pack, the power connector is connected to the main power supply of the battery pack, and the low-voltage connector is connected to the collection system of the battery pack.

10. The battery pack according to any one of claims 1 to 9, characterized in that: The main frame includes a frame body and a partition plate arranged in the frame body, wherein the partition plate extends in a front-to-rear direction and the partition plate divides the interior of the frame body into two installation spaces; Each of the installation spaces is provided with a plurality of the battery cell modules arranged in sequence along the front-to-back direction, and the quick-change mechanisms are provided on the left and right sides of each of the battery cell modules.

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