A start-stop battery and vehicle

Abstract

The utility model provides a kind of start-stop battery and vehicle, start-stop battery includes base, at least two core packages, multiple pole posts and at least two cover bodies;Base is equipped with at least two installation grooves;Each installation groove is equipped with core package;Each core package is connected with pole post;Each cover body is covered in one of installation grooves, each cover body is equipped with pole post hole, liquid injection hole and explosion-proof structure, and pole post is arranged in pole post hole.The start-stop battery of the application has the advantage that the sealing effect of the cover body is good.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a start-stop battery and a vehicle. Background Technology

[0002] A start-stop battery is a high-performance battery specifically designed for automotive start-stop systems. Its main function is to support the rapid starting of the engine during frequent start-stop operations and to provide a stable power supply to the vehicle's electrical equipment.

[0003] In related technologies, after the start-stop battery cell pack is installed, a cover is needed to seal the cell pack. However, the sealing effect at the cover is poor, which can easily lead to installation problems. Utility Model Content

[0004] The embodiments of this utility model provide a start-stop battery and vehicle that can improve the technical problem of poor sealing effect at the cover.

[0005] In a first aspect, embodiments of the present invention provide a start-stop battery, comprising:

[0006] A base, wherein the base is provided with at least two mounting slots;

[0007] At least two core packages are provided, and each of the mounting slots is provided with a core package;

[0008] Multiple terminals, each of the core packages being connected to one of the terminals; and,

[0009] At least two covers are provided, each cover covering one of the mounting slots. Each cover is provided with a terminal hole, a liquid injection hole, and an explosion-proof structure. The terminal is inserted through the terminal hole and directly mounted in the mounting slot of the base through the core pack, which makes the start-stop battery easy to assemble.

[0010] In some embodiments, the cover is bonded to the base to improve the stability of the cover installation.

[0011] In some embodiments, the peripheral edge of each of the covers is bonded to the base with sealant to improve the sealing effect between the peripheral edge of the cover and the base; and / or,

[0012] The two adjacent covers are bonded and fixed together with sealant to improve the stability and reliability of the cover installation.

[0013] In some embodiments, a sealant is provided between the hole wall of the electrode post and the electrode post to improve the sealing effect of the mounting groove.

[0014] In some embodiments, the number of electrode holes is two in the same cover, and at least one of the explosion-proof structure and the liquid injection hole is located between the two electrode holes; when the explosion-proof structure is located between the two electrode holes, it facilitates the timely ejection of high-temperature fluid inside the battery in the event of thermal runaway; when at least one of the liquid injection holes is located between the two electrode holes, it facilitates the injection of electrolyte.

[0015] In some embodiments, the base is a one-piece molded part to improve the energy density of the start-stop battery.

[0016] In some embodiments, the base includes:

[0017] bottom wall;

[0018] A first sidewall, the first sidewall being connected to the outer periphery of the bottom wall; and,

[0019] A separator is located on the inner circumferential side of the first sidewall, and the separator has at least two mounting slots spaced out on the inner circumferential side of the first sidewall to improve the energy density of the start-stop battery.

[0020] In some embodiments, the start-stop battery further includes a first seal, the first seal comprising:

[0021] An annular portion, the annular portion being disposed around the first sidewall to seal the gap between the first sidewall and the plurality of the covers; and,

[0022] At least one connecting portion extending along the partition to seal the gap between the partition and two adjacent covers, thereby improving the sealing effect of the mounting groove.

[0023] In some embodiments, the first seal includes an adhesive with a temperature tolerance greater than or equal to 120°C to improve the stability of the cover installation.

[0024] In some embodiments, at least one of the first sidewall, the partition, and the cover is provided with an overflow groove, and the first seal is at least partially located within the overflow groove to prevent the adhesive from overflowing to other locations.

[0025] In some embodiments, the first sidewall and / or the partition are provided with positioning steps, and the cover is disposed on the positioning steps to facilitate the quick positioning and installation of the cover.

[0026] In some embodiments, the start-stop battery is a sodium-ion battery, which gives it the advantages of high and low temperature resistance and good rate performance.

[0027] In some embodiments, the start-stop battery further includes:

[0028] A first outer shell, which covers the outer surface of the cover; and,

[0029] A connector is located between the first outer shell and the cover, and at least two adjacent poles are connected to the connector, thereby enabling series, parallel, or mixed connections between the core packages.

[0030] Secondly, embodiments of this utility model also provide a vehicle that includes the aforementioned start-stop battery, thereby possessing all the technical effects of the aforementioned start-stop battery.

[0031] The beneficial effects of the embodiments of this utility model are as follows:

[0032] In the embodiments of this utility model, electrolyte can be injected into each mounting slot through the injection hole. When thermal runaway occurs in the core package within each mounting slot, the corresponding high-temperature fluid can be ejected through the explosion-proof structure. Furthermore, different mounting slots can be independently sealed with different covers. Compared to using the same cover for all mounting slots, this embodiment reduces the difficulty of cover sealing, thereby improving the sealing effect at each cover. Additionally, even if the cover of one mounting slot fails to seal properly, it is less likely to affect the sealing of other mounting slots, thus improving the technical problem of poor sealing at the cover. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a start-stop battery provided for an embodiment of the present invention.

[0035] Figure 2 for Figure 1 The diagram shows a structural schematic of the start-stop battery from another perspective.

[0036] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the start-stop battery.

[0037] Figure 4 for Figure 2 The diagram shows another structural schematic of the start-stop battery.

[0038] Figure 5 for Figure 3 A schematic diagram of the second structure at point X.

[0039] Figure 6 for Figure 3 The diagram shows the assembly of the base, cell pack, and terminals of the start-stop battery.

[0040] Figure 7 for Figure 3 A schematic diagram of the third structure at point X.

[0041] Figure 8 This is a schematic diagram of a second structure of a start-stop battery provided for an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100. Cover; 11. Pole post hole; 12. Injection hole; 13. Explosion-proof structure;

[0044] 200. Base; 21. Bottom wall; 22. First side wall; 221. Mounting groove; 23. Partition; 24. Positioning step; 25. Glue overflow groove;

[0045] 300, core package;

[0046] 400, pole;

[0047] 500. First outer shell;

[0048] 600. Connectors;

[0049] 700, BMS components;

[0050] 800, Second outer shell;

[0051] 900, First sealing element; 91, Annular part; 92, Connecting part. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0053] This application provides a start-stop battery and a vehicle to address the technical problem of low production efficiency of start-stop batteries.

[0054] Before describing the cover of the embodiments of this application, we will first give an overall introduction to the start-stop battery.

[0055] Start-stop batteries can be used in vehicles, including new energy vehicles and fuel vehicles, but this application does not limit the scope of the application.

[0056] The start-stop battery can be a sodium-ion battery.

[0057] Understandably, using lead-acid batteries as start-stop batteries would result in short battery life, poor resistance to over-discharge, heavy weight, and inability to discharge at low temperatures. Similarly, using lithium-ion batteries would lead to poor resistance to high and low temperatures and over-discharge, thus making them unable to withstand the high temperatures in the engine compartment of a gasoline-powered vehicle.

[0058] In contrast, the sodium-ion battery of this application embodiment has the advantage of being resistant to high temperatures, resulting in a low impact of high temperatures on the battery's lifespan, thus allowing the start-stop battery to adapt to the operating environment of gasoline vehicles. Simultaneously, the sodium-ion battery also has the advantage of good rate performance, enabling the start-stop battery to maintain a high retention rate at low temperatures, ensuring normal vehicle operation in cold environments.

[0059] Optionally, the start-stop battery can also be a lead-acid battery or a lithium-ion battery, etc., and this application embodiment does not limit this.

[0060] In related technologies, start-stop batteries typically consist of a base and multiple battery cells. The base houses the battery cells, each comprising a steel casing, a cover, a core, and terminals. A cavity is formed between the steel casing and the cover, within which the core is installed, and the terminals pass through the cover for electrical connection to the core. Therefore, in actual production, multiple battery cells must first be assembled independently before being individually installed into the base, resulting in low production efficiency for start-stop batteries.

[0061] Based on this, please refer to Figure 1 , Figure 2 and Figure 3 This application provides a start-stop battery, including a base 200, at least two cell packs 300, multiple terminals 400, and at least two covers 100.

[0062] The base 200 has at least two mounting slots 221. Each mounting slot 221 contains a core package 300. Each core package 300 is connected to an electrode post 400. Each cover 100 is fitted over one of the mounting slots 221, and each cover 100 has an electrode post hole 11, a liquid injection hole 12, and an explosion-proof structure 13. The electrode post 400 passes through the electrode post hole 11.

[0063] Electrolyte can be injected into each mounting slot 221 through the injection hole 12. When thermal runaway occurs in the core pack 300 in each mounting slot 221, the corresponding high-temperature fluid can be ejected through the explosion-proof structure 13. Based on this, since the core pack 300 is directly placed in the mounting slot 221 of the base 200, the steel shell of the traditional battery cell is eliminated. This can improve the energy density of the start-stop battery, simplify the assembly steps of the start-stop battery, and ultimately improve the technical problem of low production efficiency of the start-stop battery.

[0064] Furthermore, compared to using the same cover 100 to encapsulate all mounting slots 221, on the one hand, the embodiments of this application can reduce the difficulty of encapsulating the cover 100, thereby improving the sealing effect at each cover 100. On the other hand, even if the cover 100 of a certain mounting slot 221 is not properly sealed, it is not easy to affect the sealing of other mounting slots 221, thereby improving the technical problem of poor sealing effect at the cover 100.

[0065] Please continue to refer to this. Figure 4 In some embodiments, the start-stop battery further includes a first housing 500 and a connector 600. The first housing 500 covers the outer surface of the cover 100. The connector 600 is located between the first housing 500 and the cover 100, and at least two adjacent terminals 400 are connected to the connector 600. Thus, the connector 600 allows for series, parallel, or mixed connection between different core packs 300, while the first housing 500 provides effective protection for the connector 600 and the terminals 400.

[0066] In some embodiments, two terminals 400 are provided through the first housing 500, such that one terminal 400 provided through the first housing 500 serves as the total positive terminal of the start-stop battery, and the other terminal 400 provided through the first housing 500 serves as the total negative terminal of the start-stop battery.

[0067] Optionally, the start-stop battery may also include two terminals, each of which passes through the first housing 500 and is connected to the terminal 400. Thus, one terminal serves as the total positive terminal of the start-stop battery, and the other terminal serves as the total negative terminal of the start-stop battery. This application embodiment does not limit this.

[0068] In some embodiments, the start-stop battery may also include a BMS (Battery Management System) component 700, which may be disposed between the first housing 500 and the cover 100.

[0069] Therefore, one possible assembly method for the start-stop battery is:

[0070] First, insert the core packs 300 into their respective mounting slots 221; then, weld and fix the pole posts 400 to the corresponding pole tabs of the core packs 300; next, install the cover 100 onto the base 200 so that the pole posts 400 pass through the cover 100; then, install the connectors 600 and BMS components 700, etc., on the outer surface of the cover 100; finally, install the first outer shell 500.

[0071] The technical solutions of the embodiments of this application will now be described in conjunction with the cover 100.

[0072] Within the same cover 100, there are two electrode post holes 11. Furthermore, each core package 300 within the mounting slot 221 can be connected to two electrodes 400 passing through the cover 100. One electrode 400 connected to each core package 300 serves as the positive electrode, and the other as the negative electrode.

[0073] In some embodiments, within the same cover 100, the explosion-proof structure 13 and / or the injection hole 12 are located between two pole holes 11.

[0074] For example, within the same cover 100, when the explosion-proof structure 13 is located between two pole holes 11, the explosion-proof structure 13 can be closer to the center of the corresponding mounting groove 221. Furthermore, after thermal runaway occurs inside the corresponding mounting groove 221, the high-temperature fluid in each area inside the mounting groove 221 can be promptly ejected outward from the explosion-proof structure 13.

[0075] For example, within the same cover 100, when the injection hole 12 is located between two electrode holes 11, the explosion-proof structure 13 can be closer to the center of the corresponding mounting groove 221. Furthermore, it is more convenient to inject electrolyte from above the center of the mounting groove 221, allowing the electrolyte to flow more evenly and smoothly into all areas of the mounting groove 221, thereby improving the efficiency of electrolyte injection.

[0076] It should be noted that in this application, "and / or" describes the relationship between related objects, indicating that there can be three kinds of relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0077] That is to say, within the same cover 100, one of the explosion-proof structure 13 and the liquid injection hole 12 may be located between the two pole holes 11, or both the explosion-proof structure 13 and the liquid injection hole 12 may be located between the two pole holes 11. This application embodiment does not limit this.

[0078] In some embodiments, the electrode hole 11 can be a square hole. Optionally, the electrode hole 11 can also be a circular hole, and this application embodiment does not limit this.

[0079] In some embodiments, the start-stop battery also includes a second seal installed at the injection port 12 for sealing the injection port 12.

[0080] The second sealing element may include sealing pins, etc., but this application embodiment does not limit this.

[0081] The explosion-proof structure 13 may include a pressure relief port for installing an explosion-proof valve. Furthermore, in the event of thermal runaway within each mounting slot 221, the corresponding explosion-proof valve can burst open to relieve pressure.

[0082] Optionally, the explosion-proof structure 13 may include explosion-proof grooves. Thus, in the event of thermal runaway within each mounting slot 221, the corresponding explosion-proof grooves can burst open to release pressure.

[0083] In some embodiments, multiple covers 100 are arranged along the length of the base 200. Furthermore, multiple mounting slots 221 on the base 200 may also be arranged along the length.

[0084] For example, there can be four covers 100, which are arranged along the length of the base 200.

[0085] In some embodiments, the cover 100 is bonded to the base 200. Furthermore, the bonded structure can improve the stability of the connection between the cover 100 and the base 200.

[0086] For example, the peripheral edge of each cover 100 is bonded and fixed to the base 200 with sealant, thereby sealing the gap between the peripheral edge of the cover 100 and the base 200, so as to improve the sealing effect of the mounting groove 221.

[0087] In some embodiments, two adjacent covers 100 are bonded together with sealant. Furthermore, the bonding between the covers 100 can improve the stability and reliability of the cover installation.

[0088] In some embodiments, the wall of the electrode post hole 11 is sealed to the electrode post 400 with sealant. This improves the sealing effect at the electrode post hole 11.

[0089] Sealants may include adhesives, which have a temperature resistance greater than or equal to 120°C.

[0090] The adhesive may include epoxy resin adhesive, UV (Ultraviolet Rays) adhesive, etc., and the embodiments of this application do not limit it.

[0091] The technical solutions of the embodiments of this application will be further described below in conjunction with the base 200.

[0092] In some embodiments, the base 200 has a partition 23 inside, which divides at least two mounting slots 221 inside the base 200.

[0093] Therefore, compared to installing different core packs 300 through multiple independent steel shells inside the base 200, in this embodiment, at least two mounting slots 221 are directly spaced out inside the base 200 by a partition 23, so that the partition 23 can be reused as a common sidewall of two adjacent mounting slots 221, thereby improving the energy density of the start-stop battery.

[0094] For example, the base 200 may include a bottom wall 21 and a first side wall 22. The first side wall 22 is connected to the outer periphery of the bottom wall 21, and the partition 23 is located on the inner periphery of the first side wall 22. Furthermore, at least two mounting slots 221 can be spaced out on the inner periphery of the first side wall 22 by the partition 23.

[0095] The mounting slot 221 can be a square slot or other shapes; this application embodiment does not limit this.

[0096] The dimensions of the multiple mounting slots 221 may be the same or different, and this application embodiment does not limit this.

[0097] In some embodiments, the base 200 can be a one-piece molded part. Therefore, compared to setting multiple independent bases 200, each base 200 having a mounting slot 221, this embodiment of the application forms multiple mounting slots 221 within a base 200, so that two adjacent mounting slots 221 can share a partition 23 as a sidewall, making the start-stop battery structure more compact and thus improving the energy density of the start-stop battery.

[0098] It is also understandable that when the start-stop battery is a sodium-ion battery, the technical problem of low energy density of sodium-ion batteries can be effectively improved by using an integrated base 200.

[0099] For example, the base 200 can be a plastic part. Furthermore, the base 200 can be integrally molded by injection molding.

[0100] The base 200 can be an insulating plastic part, so that no other insulating parts need to be set between the base 200 and the terminal post 400 and the core pack 300, so that the start-stop battery has the advantage of easy assembly.

[0101] Of course, in some other embodiments, the base 200 can also be a metal part. For example, the base 200 can be integrally formed by stamping and die casting, and this application embodiment does not limit this.

[0102] It is understandable that when the base 200 is a metal part, the start-stop battery may also include a second housing 800, which is a plastic part, and the base 200 is disposed inside the second housing 800, thereby achieving insulation between the base 200 and external devices.

[0103] The second outer shell 800 and the first outer shell 500 can be integrally formed or separately formed; this application embodiment does not limit this.

[0104] Please continue to refer to this. Figure 5 In some embodiments, the first sidewall 22 and / or partition 23 are provided with positioning steps 24, and the cover 100 is disposed on the positioning steps 24.

[0105] Furthermore, during the assembly of the start-stop battery, the cover 100 can be quickly and accurately positioned using the positioning step 24.

[0106] In some embodiments, the first sidewall 22 and / or partition 23 are bonded and fixed to the cover 100, thereby enabling the installation of the cover 100.

[0107] For example, please continue to refer to Figure 6 The start-stop battery also includes a first seal 900. The first seal 900 includes an annular portion 91 and at least one connecting portion 92. The annular portion 91 is disposed around a first sidewall 22 to seal the gap between the first sidewall 22 and the plurality of covers 100. The connecting portion 92 extends along a partition 23 to seal the gap between the partition 23 and two adjacent covers 100. Thus, the first seal 900 enables a seal between the cover 100 and the opening of the mounting groove 221.

[0108] In some embodiments, the first seal 900 includes an adhesive. Furthermore, the first seal 900 can also be used to connect the cover 100 to the base 200.

[0109] The adhesive has a temperature tolerance of 120°C or higher.

[0110] Please continue to refer to this. Figure 7 In some embodiments, at least one of the first sidewall 22, partition 23 and cover 100 is provided with an overflow groove 25, and the first seal 900 is at least partially located in the overflow groove 25.

[0111] Furthermore, the high-temperature resistant adhesive between the base 200 and the cover 100 can overflow into the adhesive overflow groove 25 to prevent the high-temperature resistant adhesive from overflowing to other locations and interfering with other parts of the battery.

[0112] In some embodiments, the first seal 900 may be at least partially sandwiched between the base 200 and the cover 100.

[0113] Please continue to refer to this. Figure 8 Optionally, the first seal 900 may also at least partially cover the outer surfaces of the base 200 and the cover 100, but this embodiment of the application does not limit this.

[0114] In some implementations, the pole post 400 can be directly connected to the tab of the core package 300. For example, the tab of the core package 300 can be directly welded to the pole post 400.

[0115] Optionally, the pole post 400 can also be indirectly connected to the tab of the core package 300. For example, the tab of the core package 300 is first welded and fixed to the tab connector, and the tab connector is then welded and fixed to the pole post 400.

[0116] In some implementations, the core pack 300 can be a wound core.

[0117] Optionally, the core package 300 can also be a stacked core package, and this application embodiment does not limit this.

[0118] In some embodiments, the core pack 300 is exposed within the mounting slot 221, thereby eliminating the need for a protective structure (such as the steel shell of a battery cell) to enclose the core pack 300 within the mounting slot 221. This allows more space within the mounting slot 221 to be used for mounting the core pack 300, thereby increasing the energy density of the start-stop battery and ultimately addressing the technical problem of low energy density in start-stop batteries.

[0119] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A start-stop battery, characterized in that, include: A base (200) having at least two mounting slots (221); At least two core packages (300), each of the mounting slots (221) is provided with a core package (300); Multiple pole posts (400), each of the core packages (300) is connected to one of the pole posts (400); and, At least two covers (100), each cover (100) covering one of the mounting slots (221), each cover (100) having an electrode hole (11), an injection hole (12) and an explosion-proof structure (13), the electrode (400) passing through the electrode hole (11).

2. The start-stop battery according to claim 1, characterized in that, The cover (100) is bonded and fixed to the base (200).

3. The start-stop battery according to claim 2, characterized in that, Each of the cover bodies (100) is bonded and fixed to the base (200) with sealant at its peripheral edge; and / or, The two adjacent covers (100) are bonded and fixed together with sealant.

4. The start-stop battery according to claim 1, characterized in that, A sealant is provided between the hole wall of the pole post hole (11) and the pole post (400).

5. The start-stop battery according to claim 1, characterized in that, In the same cover (100), there are two pole holes (11), and at least one of the explosion-proof structure (13) and the injection hole (12) is located between the two pole holes (11).

6. The start-stop battery according to any one of claims 1 to 5, characterized in that, The base (200) includes: bottom wall(21); A first sidewall (22) is connected to the outer periphery of the bottom wall (21); and, A partition (23) is located on the inner circumferential side of the first sidewall (22), and the partition (23) provides at least two mounting grooves (221) on the inner circumferential side of the first sidewall (22).

7. The start-stop battery according to claim 6, characterized in that, The base (200) is a one-piece molded part.

8. The start-stop battery according to claim 6, characterized in that, The start-stop battery further includes a first seal (900), the first seal (900) comprising: An annular portion (91) is provided around the first sidewall (22) to seal the gap between the first sidewall (22) and the plurality of covers (100); and, At least one connecting portion (92) extends along the partition (23) to seal the gap between the partition (23) and two adjacent covers (100).

9. The start-stop battery according to claim 8, characterized in that, The first seal (900) includes an adhesive that has a temperature tolerance greater than or equal to 120°.

10. The start-stop battery according to claim 9, characterized in that, At least one of the first sidewall (22), the partition (23) and the cover (100) is provided with an overflow groove (25), and the first seal (900) is at least partially located in the overflow groove (25).

11. The start-stop battery according to claim 6, characterized in that, The first sidewall (22) and / or the partition (23) are provided with positioning steps (24), and the cover (100) is disposed on the positioning steps (24).

12. The start-stop battery according to any one of claims 1 to 5, characterized in that, The start-stop battery is a sodium-ion battery.

13. The start-stop battery according to any one of claims 1 to 5, characterized in that, The start-stop battery also includes: A first outer shell (500) is provided on the outer surface of the cover (100); and, A connector (600) is located between the first housing (500) and the cover (100), and at least two adjacent pole posts (400) are connected to the connector (600).

14. A vehicle, characterized in that, Includes the start-stop battery as described in any one of claims 1 to 13.

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