Lithium ion auxiliary battery shell and lithium ion auxiliary battery

Abstract

The utility model discloses a lithium ion auxiliary battery shell and a lithium ion auxiliary battery. The cover body is hollow, an opening is formed in one end of the cover body, the cover body comprises an upper top cover and a frame assembly which are connected with each other, the upper top cover comprises a top cover main body, a relay convex hull and a water chute, the top cover main body is connected with the frame assembly and protrudes upwards, the relay convex hull is located on one side of the top cover main body, and the water chute is located on the side of the relay convex hull; the water chute is located between the top cover main body and the relay convex hull, and the height of the water chute is gradually reduced and extends to the frame assembly; the box body and the cover body are detachably connected to form a containing cavity. According to the embodiment of the invention, the water chute is designed, so that condensed water can flow out of the outer surface of the battery along the water chute after dropping, and internal electrical components are prevented from being damaged by water vapor permeating into the inner cavity of the battery after long-term water dropping; the relay convex hulls are independently designed, the relay convex hulls have the function of avoiding the relay installed in the shell, only the shell is locally heightened, and the adaptability of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and particularly relates to a lithium-ion auxiliary battery housing and a lithium-ion auxiliary battery. Background Art

[0002] The 12V auxiliary lithium battery plays an important role in electric vehicles. First of all, it is responsible for providing electrical energy for the high-voltage system of the electric vehicle to ensure the normal operation of the high-voltage system before power-on. At the same time, it also provides power for 12V electrical equipment to ensure the normal use of the vehicle. Secondly, when the vehicle is turned off and parked, the 12V auxiliary lithium battery will supply power to the constant-power module to ensure the normal operation of the vehicle's electronic system during parking. In addition, when the direct current - direct current (DC - DC) output of the vehicle is insufficient, the 12V auxiliary lithium battery will assist in discharging to meet the vehicle's power demand. Finally, when the vehicle is parked, the 12V auxiliary lithium battery also provides electrical energy for the vehicle cloud system and monitoring system to ensure the remote monitoring and data transmission of the vehicle.

[0003] However, conventional low-voltage lithium batteries usually use nylon shell materials, which have strong water absorption. Since this product is placed under the vehicle air conditioner, it will be dripped by condensed water for a long time. The battery housing may affect the battery performance due to water absorption, resulting in safety risks such as short-circuit failures.

[0004] In summary, the existing auxiliary lithium batteries have technical problems of insufficient protection ability and insufficient reliability. Summary of the Utility Model

[0005] The purpose of this application is to overcome the above technical deficiencies and propose a lithium-ion auxiliary battery housing and a lithium-ion auxiliary battery to solve the technical problems of insufficient protection ability and insufficient reliability in the existing technology.

[0006] To achieve the above technical purpose, this application adopts the following technical solutions:

[0007] In the first aspect, this application provides a lithium-ion auxiliary battery housing, including a cover body and a box body:

[0008] The cover body is hollow and has an opening at one end. The cover body includes a top cover and a border component connected to each other. The top cover includes a top cover main body, a relay boss, and a water guide groove. The top cover main body is connected to the border component and protrudes upward. The relay boss is located on one side of the top cover main body. The water guide groove is located between the top cover main body and the relay boss, and the height of the water guide groove gradually decreases and extends to the border component;

[0009] The box body is detachably connected to the cover body to form a receiving cavity.

[0010] In some embodiments of the present application, it further includes a positive output terminal post and a negative output terminal post. The positive output terminal post and the negative output terminal post are respectively located at two ends of the relay boss, and the positive output terminal post, the negative output terminal post and the relay boss are located on the same side of the top cover body.

[0011] In some embodiments of the present application, it further includes a baffle, and the baffle is located between the positive output terminal post and the water guide groove, and between the negative output terminal post and the water guide groove.

[0012] In some embodiments of the present application, the protruding height of the relay boss is greater than the protruding height of the top cover body, and the height of the baffle is greater than the protruding height of the top cover body.

[0013] In some embodiments of the present application, it further includes a positive copper busbar and a negative copper busbar. The positive copper busbar is injection-molded and connected to the inner side of the cover body and is press-riveted to the positive output terminal post, and the negative copper busbar is injection-molded and connected to the inner side of the cover body and is press-riveted to the negative output terminal post.

[0014] In some embodiments of the present application, it further includes a communication interface, a connecting wire and a four-pin plug. The communication interface is opened at the edge of the top cover body, the connecting wire is located inside the cover body, and one end of the four-pin plug is connected to the connecting wire and the other end is exposed through the communication interface.

[0015] In some embodiments of the present application, the border component of the cover body includes a plurality of downwardly extending snap grooves, the box body includes a plurality of snaps, the snaps are respectively and correspondingly embedded in the snap grooves, and the cover body is snap-connected to the box body.

[0016] In some embodiments of the present application, the inner side of the border component of the cover body has a sealant groove, the sealant groove is annular to accommodate sealant, and the cover body is adhesively connected to the box body.

[0017] In some embodiments of the present application, it further includes a plurality of reinforcing ribs, and the reinforcing ribs are located inside the cover body and extend to the border component at both ends respectively.

[0018] In a second aspect, the present application further provides a lithium-ion auxiliary battery, including a battery cell, a battery management system (Battery Management System, BMS) and the lithium-ion auxiliary battery housing as described in any one of the embodiments of the first aspect;

[0019] Wherein, both the battery cell and the battery management system are located in the accommodation cavity of the lithium-ion auxiliary battery housing, and the battery management system is located inside the relay boss of the lithium-ion auxiliary battery housing.

[0020] Compared with the prior art, the technical solution provided by this application has the following beneficial technical effects:

[0021] In the embodiment of the present application, a water guide groove is designed to receive condensed water dripping from the air conditioner. After dripping, the condensed water can flow out of the outer surface of the battery along the water guide groove, thereby preventing water vapor from penetrating into the inner cavity of the battery and causing damage to internal electrical components after long-term dripping from the outside. The relay convex hump is designed separately, whose function is to avoid the relay installed inside the shell. The height of the relay convex hump does not have to be limited to the overall height of the top cover body, and only the shell is partially raised to improve the adaptability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution in this application, the following is a brief introduction to the drawings required for use in the embodiments:

[0023] Figure 1 It is a structural schematic diagram of a cover body provided in an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the structure of the outer side of a cover body provided in an embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the structure of the inner side of a cover provided in an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the structure of the inner side of another cover provided in an embodiment of the present application;

[0027] Figure 5 This is a schematic diagram of the structure of the inner side of another cover provided in an embodiment of the present application;

[0028] Figure 6 It is a structural schematic diagram of a lithium-ion auxiliary battery shell provided in an embodiment of the present application.

[0029] Reference numerals:

[0030] 1-cover, 2-upper cover, 3-frame assembly, 4-top cover body, 5-positive copper bar, 6-BMS, 7-negative copper bar, 8-flange nut, 9-box, 10-small cover;

[0031] 21- output pole, 22- communication interface, 23- water guide groove, 24- baffle, 25- relay convex bump, 26- buckle groove, 27- small cover mounting hole;

[0032] 41-sealant groove, 42-metal stud, 43-copper busbar locating pin, 44-BMS locating pin, 45-BMS mounting hole, 46-reinforcement rib. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] Those skilled in the art of the present technology can understand that in this specification, the term "including" is an open-ended expression, which means that there are the described features but does not exclude other features. The orientation terms "upper", "lower", "left", "right", etc. are exemplary directions based on the accompanying drawings. The features defined with "first" and "second" implicitly include one or more of such features. The singular form can also be used for the plural form. The meaning of "a plurality" is two or more. The terms "install", "connect", and "couple" can be fixedly connected, detachably connected, or integrally connected; they can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components. In addition, "connection" can include wireless connection.

[0035] The objective of the present application is to overcome the above technical deficiencies and propose a lithium-ion assisted battery housing and a lithium-ion assisted battery, so as to solve the technical problems of insufficient protection ability and insufficient reliability in the prior art.

[0036] To achieve the above technical objectives, the present application adopts the following technical solutions:

[0037] In a first aspect, the present application provides a lithium-ion assisted battery housing, as Figures 1-6 shown, Figure 1 is a schematic structural diagram of a cover body 1 provided by an embodiment of the present application; Figure 2 is a schematic structural diagram of the outside of a cover body 1 provided by an embodiment of the present application; Figure 3 is a schematic structural diagram of the inside of a cover body 1 provided by an embodiment of the present application; Figure 4 is another schematic structural diagram of the inside of a cover body 1 provided by an embodiment of the present application; Figure 5 is still another schematic structural diagram of the inside of a cover body 1 provided by an embodiment of the present application; Figure 6 is a schematic structural diagram of a lithium-ion assisted battery housing provided by an embodiment of the present application.

[0038] A lithium-ion assisted battery housing includes a cover body 1 and a box body 9:

[0039] Cover body 1, the cover body 1 is hollow and has an opening at one end. The cover body 1 includes an upper top cover 2 and a border component 3 which are connected to each other. The upper top cover 2 includes a top cover main body 4, a relay boss 25 and a water guide groove 23. The top cover main body 4 is connected to the border component 3 and protrudes upward. The relay boss 25 is located on one side of the top cover main body 4. The water guide groove 23 is located between the top cover main body 4 and the relay boss 25. The height of the water guide groove 23 gradually decreases and extends to the border component 3;

[0040] Box body 9, the box body 9 is detachably connected to the cover body 1 to form a receiving cavity.

[0041] In the embodiment of the present application, by designing the water guide groove 23, the water guide groove 23 receives the condensed water dripping from the air conditioner. After the condensed water drops, it can flow out of the outer surface of the battery along the water guide groove 23, preventing water vapor from seeping into the battery inner cavity after long-term external dripping and causing damage to the internal electrical components; by separately designing the relay boss 25, its function is to avoid the position of the relay installed inside the housing. The height of the relay boss 25 does not have to be limited by the overall height of the top cover main body 4, only locally increasing the height of the housing to improve the battery adaptability.

[0042] In some embodiments of the present application, there are also two output terminal posts 21. The output terminal posts 21 include a positive output terminal post and a negative output terminal post. The positive output terminal post and the negative output terminal post are respectively located at both ends of the relay boss 25. The positive output terminal post, the negative output terminal post and the relay boss 25 are located on the same side of the top cover main body 4.

[0043] In some embodiments of the present application, there is also a baffle 24. The baffle 24 is located between the positive output terminal post and the water guide groove 23, and between the negative output terminal post and the water guide groove 23.

[0044] In this embodiment, the baffle 24 is arranged on the outer surface of the housing. The baffle 24 separates the two output terminal posts 21 and the water guide groove 23, preventing the condensed water from splashing onto the positive output terminal post and the negative output terminal post when it drops on the water guide groove 23.

[0045] The water guide groove 23 is arranged below the dripping position of the air conditioner condensed water. After the condensed water drops, it can flow out of the outer surface of the battery along the water guide groove 23. The housing material is made of polypropylene glycol (PPE) material. The PPE material has poor water absorption, which can prevent water vapor from seeping into the battery inner cavity after long-term external dripping and causing damage to the internal components.

[0046] In some embodiments of the present application, the protruding height of the relay boss 25 is greater than the protruding height of the top cover main body 4, and the height of the baffle 24 is greater than the protruding height of the top cover main body 4.

[0047] In this embodiment, the relay boss 25 is arranged on the outer surface of the housing, and its function is to avoid the position of the relay installed inside the housing. Only a part of the housing is raised, and there is no need to raise the entire cover 1 to accommodate the relay, thereby improving the battery adaptability.

[0048] In some embodiments of the present application, it further includes a positive copper busbar 5 and a negative copper busbar 7. The positive copper busbar 5 is injection-molded and connected to the inner side of the cover 1 and is press riveted to the positive output pole column. The negative copper busbar 7 is injection-molded and connected to the inner side of the cover 1 and is press riveted to the negative output pole column.

[0049] In this embodiment, the positive and negative output pole columns are respectively press riveted on the positive copper busbar 5 and the negative copper busbar 7, and the positive copper busbar 5 and the negative copper busbar 7 are injection-molded in the housing as inserts.

[0050] In some embodiments of the present application, it further includes a communication interface 22, a connecting wire, and a four-pin plug. The communication interface 22 is opened at the edge of the top cover body 4. The connecting wire is located inside the cover 1. One end of the four-pin plug is connected to the connecting wire, and the other end is exposed through the communication interface 22.

[0051] In this embodiment, the communication interface 22 contains 4 pin needles, and the communication interface 22 as a whole is injection-molded in the housing as a secondary injection-molded insert.

[0052] In some embodiments of the present application, the frame assembly 3 of the cover 1 includes a plurality of downwardly extending snap grooves 26, and the box body 9 includes a plurality of snaps. The snaps are respectively and correspondingly embedded in the snap grooves 26, and the cover 1 is snap-connected to the box body 9.

[0053] In this embodiment, there are 4 snap grooves 26 provided on the side of the housing, and the snaps on the accessory battery box body 9 are snap-fitted with them for pre-fixation.

[0054] In some embodiments of the present application, the inner side of the frame assembly 3 of the cover 1 has a sealant groove 41. The sealant groove 41 is annular to accommodate sealant, and the cover 1 is adhesively connected to the box body 9.

[0055] In this embodiment, the sealant groove 41 is arranged around the inner surface of the housing to accommodate sealant and is adhesively bonded after being installed with the battery box body 9.

[0056] In some embodiments of the present application, it further includes a plurality of reinforcing ribs 46. The reinforcing ribs 46 are located inside the cover 1 and extend to the frame assembly 3 at both ends.

[0057] In this embodiment, the reinforcing ribs 46 are irregularly arranged on the inner surface of the housing to strengthen the overall strength of the housing.

[0058] In other embodiments, the outer surface of the cover body 1 further includes a plurality of small cover mounting holes 27, and the small cover mounting holes 27 are formed in the top cover main body 4.

[0059] The inner surface of the cover body 1 further includes metal studs 42, copper busbar positioning pins 43, BMS positioning pins 44 and screws. The metal studs 42 are placed in the housing through insert molding for installing electrical components in the housing. The copper busbar positioning pins 43 are used to guide and position the copper busbar 5. The BMS positioning pins 44 are used to guide and position the BMS 6. The BMS mounting holes 45 are used to fix the BMS 6 through self-tapping screws.

[0060] In a second aspect, the present application further provides a lithium-ion auxiliary battery, including a battery cell, a battery management system 6 and a lithium-ion auxiliary battery housing as described in any one of the embodiments of the first aspect;

[0061] Wherein, the battery cell and the battery management system 6 are both located in the accommodation cavity of the lithium-ion auxiliary battery housing, and the battery management system 6 is located inside the relay boss 25 of the lithium-ion auxiliary battery housing.

[0062] In this embodiment, during the assembly process, first position the copper busbar 5 through the positioning pin and place it in the housing, then position the BMS protection board through the positioning pin and place it in the housing, and lock and fix it with M4 self-tapping screws and M6 flange nuts 8; fill sealant in the sealant groove 41 of the housing, snap the buckle of the housing and the battery box 9 for pre-fixing, embed the port of the battery box 9 into the sealant groove 41 of the housing for adhesive fixation, and finally install the small cover 10 for plugging.

[0063] The outer surface features of this housing provide power interfaces with the vehicle, communication interfaces 22, and protection for the positive and negative terminals. The inner surface features provide effective positioning and fixing structures for the installation of mating parts while ensuring the strength of the housing.

[0064] Compared with the prior art, the beneficial technical effects brought by the technical solution provided by the present application include:

[0065] In the embodiment of the present application, by designing the water guide groove 23, the water guide groove 23 receives the condensed water dripping from the air conditioner, and after the condensed water drops, it can flow out of the outer surface of the battery along the water guide groove 23, preventing water vapor from seeping into the battery cavity after long-term external dripping and causing damage to internal electrical components; by separately designing the relay boss 25, its function is to avoid the position of the relay installed inside the housing. The height of the relay boss 25 does not have to be limited by the overall height of the top cover main body 4, only locally increasing the height of the housing, improving the battery adaptability.

[0066] Those skilled in the art can understand that the various operations, methods, steps, measures, and solutions in the processes discussed in this application can be alternated, changed, rearranged, decomposed, combined, or deleted.

[0067] The specific implementation manners of the present application described above do not limit the protection scope of the present application. Any other corresponding changes and deformations made according to the technical concept of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A lithium-ion auxiliary battery housing, characterized in that: include: A cover body, wherein the cover body is hollow and has an opening at one end, the cover body comprises an upper cover and a frame assembly connected to each other, the upper cover comprises a cover body, a relay convex bulge and a water guide groove, the cover body is connected to the frame assembly and protrudes upward, the relay convex bulge is located on one side of the cover body, the water guide groove is located between the cover body and the relay convex bulge, and the height of the water guide groove decreases step by step and extends to the frame assembly; The box body is detachably connected to the cover body to form a receiving cavity.

2. The lithium-ion auxiliary battery housing according to claim 1, characterized in that: It also includes a positive output pole and a negative output pole, the positive output pole and the negative output pole are respectively located at two ends of the relay convex bulge, and the positive output pole, the negative output pole and the relay convex bulge are located on the same side of the top cover body.

3. The lithium-ion auxiliary battery housing according to claim 2, characterized in that: It also includes a baffle, which is located between the positive output pole and the water guide groove, and between the negative output pole and the water guide groove.

4. The lithium-ion auxiliary battery housing according to claim 3, characterized in that: The protruding height of the relay convex bump is greater than the protruding height of the top cover body, and the height of the baffle is greater than the protruding height of the top cover body.

5. The lithium-ion auxiliary battery housing according to claim 2, characterized in that: It also includes a positive copper bar and a negative copper bar. The positive copper bar is injection-molded and connected to the inner side of the cover body and is riveted to the positive output pole. The negative copper bar is injection-molded and connected to the inner side of the cover body and is riveted to the negative output pole.

6. The lithium-ion auxiliary battery housing according to claim 1, characterized in that: It also includes a communication interface, a connecting line and a four-pin plug. The communication interface is opened on the edge of the top cover body, the connecting line is located on the inner side of the cover body, one end of the four-pin plug is connected to the connecting line, and the other end is exposed through the communication interface.

7. The lithium-ion auxiliary battery housing according to claim 1, characterized in that: The frame assembly of the cover body includes a plurality of buckle grooves extending downward, and the box body includes a plurality of buckles, and the buckles are embedded in the buckle grooves in a one-to-one correspondence, and the cover body is buckled and connected with the box body.

8. The lithium-ion auxiliary battery housing according to claim 1, characterized in that: The inner side of the frame assembly of the cover body is provided with a sealant groove, the sealant groove is annular to accommodate the sealant, and the cover body is adhesively connected to the box body.

9. The lithium-ion auxiliary battery housing according to claim 1, characterized in that: It also includes a plurality of reinforcing ribs, which are located on the inner side of the cover body and have two ends extending to the frame assembly respectively.

10. A lithium-ion auxiliary battery, characterized in that: Comprising a battery cell, a battery management system and a lithium-ion auxiliary battery housing as claimed in any one of claims 1 to 9; Wherein, the battery cell and the battery management system are both located in the accommodating cavity of the lithium-ion auxiliary battery housing, and the battery management system is located inside the relay convex bump of the lithium-ion auxiliary battery housing.

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