A parked battery pack

Abstract

The utility model discloses a kind of parking battery packs, comprising: shell, battery module, connecting assembly and battery management system, shell inside is formed with containing cavity, battery module is built-in containing cavity, connecting assembly includes two end plates and two connecting side plates, two end plates are respectively arranged at the two ends of battery module, and all with battery module abut, two ends of two connecting side plates are connected in two connecting side plates, and all with battery module abut, battery management system includes protection circuit board, protection circuit board is arranged at the side of battery module, and is connected in a connecting side plate, and protection circuit board and battery module are electrically connected.The utility model can effectively solve the problem that the existing technology is crowded in the way of heat management air flow due to the BMS is set on the top of the battery module, thereby affecting the heat dissipation of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a parking battery pack. Background Technology

[0002] The Battery Management System (BMS) is the core control hub of the battery pack, and its core functions include: core safety protection, central performance optimization, and lifespan and energy efficiency management.

[0003] For example, Chinese utility model patent CN222282115U, entitled "A Truck Parking Battery Pack," includes a lower shell, heating plate, end plate, BMS protection board, GMS communication box, battery cells, and a top cover. Its features include: multiple battery cells, each with an insulating plate; multiple cells are sequentially connected to form a battery module via connecting pieces inside the insulating plate; heating plates are located on both sides of the battery module, and an end plate is located on the end face; a pressure strip assembly is located above the end plate and is fixed to the pressure strip assembly by riveting screws; the BMS protection board and GMS communication box are located on the pressure strip assembly; the top cover is located above the pressure strip assembly and is fixedly connected to the lower shell; the battery cells are lithium iron phosphate cells. This device uses lithium iron phosphate cells, solving the problems of large battery pack size and excessive weight. During use, the heating plate solves the problem of lithium iron phosphate batteries being unusable at low temperatures, and it also allows for battery positioning during use.

[0004] However, placing the BMS on top of the battery module requires additional leads to connect to the output terminals of the terminal board, resulting in the high-voltage wiring harness being arranged across the module. This not only increases the length of the wiring harness but also makes it prone to short circuits due to vibration and wear. Furthermore, the crowded wiring harness obstructs the airflow channels for thermal management, and the BMS cover blocks the heat dissipation surface on the top of the module. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a parking battery pack that solves the technical problem in the prior art where placing the BMS on the top of the battery module causes the wiring harness to be crowded and obstructs the airflow channel for thermal management, thereby affecting the heat dissipation of the battery pack.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a parking battery pack, comprising: The shell has an internal cavity for receiving the contents; The battery module is built into the receiving cavity; A connecting assembly includes two end plates and two connecting side plates. The two end plates are respectively disposed at both ends of the battery module and abut against the battery module. The two ends of the two connecting side plates are respectively connected to the two connecting side plates and abut against the battery module. A battery management system includes a protection circuit board disposed on one side of the battery module and connected to a connection side plate, and the protection circuit board is electrically connected to the battery module.

[0007] In some embodiments, the parking battery pack further includes a positive terminal and a negative terminal, both of which are disposed at one end of the housing and connected to the housing, and both the positive terminal and the negative terminal are electrically connected to the battery module.

[0008] In some embodiments, the battery module has a positive output terminal and a negative output terminal, which are respectively disposed at both ends of the battery module. The positive output terminal of the battery module is connected to the positive terminal post. The battery management system further includes a B-connector and a P-connector. The protection circuit board is electrically connected to the negative output terminal of the battery module via the B-connector and to the negative terminal post via the P-connector.

[0009] In some embodiments, the battery management system further includes a positive output bus and a negative output bus, wherein the positive output bus is connected to the positive output terminal of the battery module and the positive terminal post, and the negative output bus is connected to the P-connection bus and the negative terminal post.

[0010] In some embodiments, the battery management system further includes a first base connected to an end plate and connected to both the positive output port and the negative output port.

[0011] In some embodiments, the positive output bar and the negative output bar are spaced apart from each other and extend in opposite directions.

[0012] In some embodiments, the battery management system further includes a second base connected to another end plate and connected to both the B-connection bar and the negative output terminal of the battery module.

[0013] In some embodiments, the end plate has at least one slot, and the inner wall of the slot has at least one slot. The battery management system further includes at least one elastic snap-fit ​​component. The elastic snap-fit ​​component includes an insert block and at least one elastic snap block. The insert block is disposed opposite to the slot and connected to the first base or the second base. The elastic snap block is connected to the insert block and can snap into the slot, so that the first base or the second base can be detachably connected to the end plate.

[0014] In some embodiments, the card slot penetrates the outer walls of both opposite sides of the end plate and communicates with the slot, the elastic card block is provided in a one-to-one correspondence with the card slot, and the cross-sectional area of ​​the elastic card block gradually increases in the direction away from the first base.

[0015] In some embodiments, the end plate is further provided with at least one guide groove, and the battery management system further includes at least one guide post, one end of which is connected to the first base or the second base, and the other end is slidably inserted into the guide groove.

[0016] Compared with the prior art, the beneficial effects of the parking battery pack provided by this utility model include: a receiving cavity for placing the battery module is provided inside the housing; a protective circuit board is disposed on one side of the battery module and is connected to the battery module through two end plates and two connecting side plates disposed circumferentially and interconnected with each other; the protective circuit board can be electrically connected to the battery module. Compared with the prior art, by placing the protective circuit board on one side of the battery module, the cross-layout of the wiring harness at the top of the battery module is reduced, which can avoid the wiring harness being crowded and obstructing the thermal management airflow channel, thus affecting the heat dissipation of the battery pack. This solves the technical problem in the prior art where placing the BMS at the top of the battery module causes the wiring harness to be crowded and obstruct the thermal management airflow channel, thereby affecting the heat dissipation of the battery pack. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of a parking battery pack provided in one embodiment of the present invention; Figure 2 This is a three-dimensional view of a parking battery pack from another perspective, according to an embodiment of the present invention. Figure 3 This is a three-dimensional view of a parking battery pack provided in one embodiment of the present invention; Figure 4 This is a three-dimensional view of the first base connected to the elastic snap-fit ​​component and guide post according to an embodiment of the present invention; Figure 5 This is a three-dimensional view from another perspective of the first base connected to the elastic snap-fit ​​member and guide post according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 100 housing; 110 casing; 120 cover; 200 battery module; 300 connecting assembly; 310 end plate; 320 connecting side plate; 400 battery management system; 410 protection circuit board; 420 B-connector; 430 P-connector; 440 positive output outlet; 450 negative output outlet; 460 first base; 470 second base; 480 flexible snap-fit ​​component; 481 insert; 482 flexible snap-fit ​​block; 490 guide post; 500 positive terminal; 600 negative terminal. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problem in the prior art where placing the protection circuit board 410 on the top of the battery module 200 causes the wiring harness to become crowded and obstruct the thermal management airflow channel, thus affecting the heat dissipation of the battery pack, this utility model provides a parking battery pack that can reduce the number of wiring harnesses crossing the module at the top of the battery module 200 by placing the protection circuit board 410 on one side of the battery module, thereby avoiding the wiring harnesses becoming crowded and obstructing the thermal management airflow channel and affecting the heat dissipation of the battery pack.

[0021] Please see Figure 1 , Figure 2 , Figure 1 This is a schematic diagram of the structure of a parking battery pack in one embodiment of the present invention. The parking battery pack includes: a housing 100, a battery module 200, a connecting component 300, and a battery management system 400. The housing 100 has an internal cavity, in which the battery module 200 is housed. The connecting component 300 includes two end plates 310 and two connecting side plates 320. The two end plates 310 are respectively disposed at both ends of the battery module 200 and abut against the battery module 200. The two ends of the two connecting side plates 320 are respectively connected to the two connecting side plates 320 and abut against the battery module 200. The battery management system 400 includes a protection circuit board 410, which is disposed on one side of the battery module and connected to a connecting side plate 320. The protection circuit board 410 is electrically connected to the battery module 200.

[0022] In this device, compared with the prior art, by placing the protection circuit board 410 on one side of the battery module, the cross-arrangement of the wiring harness across the top of the battery module 200 is reduced. This avoids the wiring harness being crowded and obstructing the thermal management airflow channel, thus affecting the heat dissipation of the battery pack. This solves the technical problem in the prior art where placing the protection circuit board 410 on the top of the battery module 200 causes the wiring harness to be crowded and obstruct the thermal management airflow channel, thereby affecting the heat dissipation of the battery pack.

[0023] Furthermore, the battery management system (BMS is the abbreviation for BATTERY MANAGEMENT SYSTEM) is the core control hub of the battery pack. Its core functions include: safety protection core, performance optimization center, and lifespan and energy efficiency management. The protection circuit board 410 here is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0024] Furthermore, parking battery packs are characterized by their compact structure and small size. Therefore, in order not to increase the volume of the parking battery pack, the layout and structural distribution within the battery pack should be reasonably arranged. Here, we can refer to the Chinese utility model patent with publication number CN222282115U, entitled "A Truck Parking Battery Pack". This is a conventional setting known to those skilled in the art, and will not be elaborated here.

[0025] In this embodiment, as Figure 1 As shown, the housing 100 includes two parts: a box body 110 and a cover body 120. The box body 110 has an internal cavity and an opening at its top that communicates with the cavity. The cover body 120 is positioned opposite the opening and is detachably connected to the box body 110 for opening or sealing the opening. The battery module 200 is built into the cavity.

[0026] Furthermore, the battery module 200 includes multiple sequentially adjacent and electrically connected battery cells. Multiple batteries are built into the receiving cavity, and foam is provided between two adjacent battery cells. The two end plates 310 and the two connecting side plates 320 are connected by rivets to form a detachable connection structure. The end plates 310 are made of extruded profiles and can be compatible with multiple battery cells of the same width. Module mounting holes and rivet holes are provided on them. The side plates are divided into heating film side plates and insulating sheet side plates, which are made of Q235 material and the design scheme is realized by stamping, which will not be described in detail here.

[0027] Furthermore, CR foam is attached to one side of the heating film, and the battery cell is attached to the other side with adhesive backing. The heating film is secured by the pressing force of the heating film side plate. The end side plate is fixed with stainless steel rivets, which can withstand extremely large shear forces, i.e., battery cell expansion forces. The heating film side plate is provided with heating film wire harness fixing bridging features, and is provided with fixing studs for the protection circuit board 410, and a sufficient distance is reserved between the studs and the protection circuit board 410 to maintain electrical clearance. These details will not be elaborated here.

[0028] Furthermore, the protection circuit board 410 serves as the electrical performance control unit for the entire package, and has the functions of voltage acquisition and management of charging and discharging. The battery's switching and forced start functions are implemented by the forced start switch, which is installed on the top cover and fixed with bolts. A connecting harness is provided below it and is connected to the CCS assembly harness. The other end of the CCS assembly harness is connected to the protection circuit board 410 to achieve control, which will not be described in detail here.

[0029] In this embodiment, as Figure 1 As shown, the parking battery pack also includes a positive terminal 500 and a negative terminal 600. Both the positive terminal 500 and the negative terminal 600 are disposed at one end of the housing 100 and connected to the housing 100. Both the positive terminal 500 and the negative terminal 600 are electrically connected to the battery module 200.

[0030] By placing both the positive terminal 500 and the negative terminal 600 at one end of the housing 100, electrical connection between the battery module 200 and external devices can be achieved.

[0031] Furthermore, two through holes are respectively opened at one end of the cover 120, and the positive terminal 500 and the negative terminal 600 can pass through the two through holes in sequence to be electrically connected to external devices.

[0032] In one embodiment, such as Figure 1 , Figure 2 As shown, the battery module 200 has a positive output terminal and a negative output terminal, which are respectively located at both ends of the battery module 200. The positive output terminal of the battery module 200 is connected to the positive terminal 500. The battery management system 400 also includes a B-connection bus 420 and a P-connection bus 430. The protection circuit board 410 is electrically connected to the negative output terminal of the battery module 200 via the B-connection bus 420, and the protection circuit board 410 is electrically connected to the negative terminal 600 via the P-connection bus 430.

[0033] The B-connector 420 and P-connector 430 are used to realize the electrical conduction between the protection circuit board 410 and the battery module 200, which have positive and negative output terminals, positive terminal 500 and negative terminal 600, respectively. This allows the positive terminal 500 and negative terminal 600 to be located at one end of the housing 100, which facilitates wiring and structural design.

[0034] Furthermore, in the battery management system (BMS), P-connector 430 and B-connector 420 are two key electrical connection components that perform different circuit functions and safety responsibilities. This is a conventional setup known to those skilled in the art and will not be described in detail here.

[0035] In one embodiment, such as Figure 1As shown, the battery management system 400 also includes a positive output bus 440 and a negative output bus 450. The positive output bus 440 is connected to the positive output terminal and the positive terminal 500 of the battery module 200, and the negative output bus 450 is connected to the P-connection bus 430 and the negative terminal 600.

[0036] The positive output bus 440 is set to connect the positive output terminal of the battery module 200 and the positive terminal 500, and the negative output bus 450 is set to connect the P-connection bus 430 and the negative terminal 600.

[0037] Furthermore, the positive output bus 440 and the negative output bus 450 here are both copper busbars that are common in the market and easy to purchase. They are conventional settings known to those skilled in the art and will not be described in detail here.

[0038] In one embodiment, such as Figures 1 to 3 As shown, the battery management system 400 also includes a first base 460, which is connected to an end plate 310 and is connected to both the positive output line 440 and the negative output line 450.

[0039] The first base 460 is used to connect and support the positive output bar 440 and the negative output bar 450 to the end plate 310, respectively.

[0040] In one embodiment, such as Figure 1 As shown, the positive output bar 440 and the negative output bar 450 are arranged alternately and extend in opposite directions.

[0041] To improve the safety of the battery pack, the positive output line 440 and the negative output line 450 are spaced apart and extend in opposite directions to avoid safety hazards caused by short circuits.

[0042] Furthermore, both the positive output row 440 and the negative output row 450 are in a "Z" shape.

[0043] In one embodiment, such as Figure 1 , Figure 3 As shown, the battery management system 400 also includes a second base 470, which is connected to the other end plate 310 and is connected to both the B-connection busbar 420 and the negative output terminal of the battery module 200.

[0044] The second base 470 is used to fix and support the B-connector row 420.

[0045] In this embodiment, the first base 460 and the second base 470 are detachably connected to the end plate 310. The detachable connection is achieved through an elastic locking structure, which facilitates installation, replacement or maintenance by the user.

[0046] Furthermore, the module is equipped with positive and negative output terminal bases. Both bases are made of low-cost PPE+GF20 material and injection molded. The positive output terminal base has two positioning posts, two Z-axis limiting buckles, and three injection-molded nuts. These three nuts respectively lock the module's positive output busbar 440, positive adapter busbar, protection circuit board 410, and P-connection busbar 430. The protection circuit board 410 adopts a negative control scheme: B-connections are directly connected to the module's negative terminal via a copper busbar; P-connections are directly connected to the positive output terminal base via a copper busbar, thus achieving a design where the battery output terminals are on the same side.

[0047] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 5 The end plate 310 has at least one slot, and the inner wall of the slot has at least one slot. The battery management system 400 also includes at least one elastic snap-fit ​​member 480. The elastic snap-fit ​​member includes a plug 481 and at least one elastic snap-fit ​​block 482. The plug 481 is disposed opposite to the slot and connected to the first base 460 or the second base 470. The elastic snap-fit ​​block 482 is connected to the plug 481 and can snap-fit ​​with the slot, so that the first base 460 or the second base 470 can be detachably connected to the end plate 310.

[0048] After inserting the insert 481 into the slot, a detachable connection can be achieved by utilizing the engaging structure between the elastic card block 482 and the card slot.

[0049] Furthermore, the first base 460 or the second base 470 can also be detachably connected by means of threaded connection or riveting, which will not be elaborated here.

[0050] In one embodiment, please refer to Figures 1 to 3 The card slots penetrate the outer walls of the two opposite sides of the end plate 310 and are connected to the slots. The elastic card blocks 482 are set one-to-one with the card slots, and the cross-sectional area of ​​the elastic card blocks 482 gradually increases in the direction away from the first base 460.

[0051] To improve the stability of the locking structure, elastic locking blocks 482 are provided on both sides of the insertion block 481. The two elastic locking blocks 482 engage with the two slots respectively to increase the connection strength and connection stability of the locking structure.

[0052] Furthermore, the cross-sectional area of ​​the elastic block 482 gradually increases in the direction away from the first base 460, forming a wedge-shaped structure that facilitates the user to insert the elastic block 482 into the slot, which will not be described in detail here.

[0053] In one embodiment, please refer to Figure 4 , Figure 5The end plate 310 is also provided with at least one guide groove, and the battery management system 400 also includes at least one guide post 490, one end of which is connected to the first base 460 or the second base 470, and the other end is slidably inserted into the guide groove.

[0054] By setting up a guiding structure with guide posts 490 and guide grooves, it is easier for users to operate and improves the convenience and stability of the connection.

[0055] In some embodiments, the connection between the second base 470 and the end plate 310 is the same as the connection between the first base 460 and the end plate 310.

[0056] Furthermore, since the length of the second base 470 is less than that of the first base 460, the number of insert blocks 481 and guide posts 490 on the second base 470 is less than the number of insert blocks 481 and guide posts 490 on the first base 460. This will not be elaborated further here. To better understand this utility model, the following is combined with... Figures 1 to 5 The technical solution of this utility model is described in detail below: The housing 100 has a cavity for housing the battery module 200. A protective circuit board 410 is located on one side of the battery module and is connected to the battery module 200 via two end plates 310 and two connecting side plates 320 arranged circumferentially and interconnected. The protective circuit board 410 is electrically connected to the battery module 200. Compared to existing technologies, by placing the protective circuit board 410 on one side of the battery module, the cross-layout of wiring harnesses at the top of the battery module 200 is reduced, preventing wiring harnesses from crowding and obstructing the thermal management airflow channels, thus affecting the heat dissipation of the battery pack.

[0057] Furthermore, in this application, the mating structure between the battery pack housing 110 and the cover 120 adopts a CCS blister forming + wiring harness solution. The end of the wiring harness has an external communication CAN point, and the strength switch is directly connected to the top cover. Some top cover overlap holes are reserved on the CCS blister forming sheet. When the torsional force of the battery is insufficient, the top cover can directly extend the boss to overlap, thereby improving the torsional force. The positive and negative output lines 450 adopt a flexible busbar form, and the top cover sets the output line electrical connection position and positioning features. The positive output line 440 adopts a Z-shaped structure, and the negative output line 450 adopts a sloping structure. The switch communication wiring harness passes from below and connects with the wiring harness on the CCS to the module protection circuit board 410 side, thus avoiding the wiring harness crimping problem. When the positive and negative output positions on the same side of the module are to be interchanged, the module output line can be updated directly on the existing output base. The overall module design achieves low cost and simple structure for interchangeable positive and negative positions on the same side of the battery.

[0058] This application, through the above structure, can solve the technical problem in the prior art where placing the BMS on top of the battery module causes the wiring harness to become crowded, obstructing the airflow channel for thermal management, thereby affecting the heat dissipation of the battery pack.

[0059] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A parking battery pack, characterized in that, include: The shell has an internal cavity for receiving the contents; The battery module is built into the receiving cavity; A connecting assembly includes two end plates and two connecting side plates. The two end plates are respectively disposed at both ends of the battery module and abut against the battery module. The two ends of the two connecting side plates are respectively connected to the two connecting side plates and abut against the battery module. A battery management system includes a protection circuit board disposed on one side of the battery module and connected to a connection side plate, and the protection circuit board is electrically connected to the battery module.

2. The parking battery pack according to claim 1, characterized in that, The parking battery pack also includes a positive terminal and a negative terminal, both of which are disposed at one end of the housing and connected to the housing, and both the positive terminal and the negative terminal are electrically connected to the battery module.

3. The parking battery pack according to claim 2, characterized in that, The battery module has a positive output terminal and a negative output terminal, which are respectively disposed at both ends of the battery module. The positive output terminal of the battery module is connected to the positive terminal post. The battery management system further includes a B-connector and a P-connector. The protection circuit board is electrically connected to the negative output terminal of the battery module via the B-connector and to the negative terminal post via the P-connector.

4. The parking battery pack according to claim 3, characterized in that, The battery management system further includes a positive output bus and a negative output bus. The positive output bus is connected to the positive output terminal of the battery module and the positive terminal post. The negative output bus is connected to the P-connection bus and the negative terminal post.

5. The parking battery pack according to claim 4, characterized in that, The battery management system further includes a first base, which is connected to an end plate and is also connected to the positive output port and the negative output port.

6. The parking battery pack according to claim 5, characterized in that, The positive output bar and the negative output bar are spaced apart from each other and extend in opposite directions.

7. The parking battery pack according to claim 4, characterized in that, The battery management system also includes a second base, which is connected to another end plate and is connected to both the B-connection bar and the negative output terminal of the battery module.

8. The parking battery pack according to claim 5, characterized in that, The end plate has at least one slot, and the inner wall of the slot has at least one slot. The battery management system further includes at least one elastic snap-fit ​​component. The elastic snap-fit ​​component includes an insert block and at least one elastic snap block. The insert block is disposed opposite to the slot and connected to the first base or the second base. The elastic snap block is connected to the insert block and can snap into the slot, so that the first base or the second base can be detachably connected to the end plate.

9. The parking battery pack according to claim 8, characterized in that, The slots penetrate the outer walls of both sides of the end plate and are connected to the slots. The elastic blocks are arranged in a one-to-one correspondence with the slots, and the cross-sectional area of ​​the elastic blocks gradually increases in the direction away from the first base.

10. The parking battery pack according to claim 8, characterized in that, The end plate is also provided with at least one guide groove, and the battery management system further includes at least one guide post, one end of which is connected to the first base or the second base, and the other end is slidably inserted into the guide groove.

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