CN214848722U

CN214848722U - Bipolar battery

Info

Publication number: CN214848722U
Application number: CN202120487975.7U
Authority: CN
Inventors: 郭晓锋; 张才勇
Original assignee: Yidewei Energy Technology Jiangsu Co ltd
Current assignee: Yidewei Energy Technology Jiangsu Co ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-11-23
Anticipated expiration: 2031-03-05

Abstract

The utility model relates to a bipolar battery. The bipolar battery includes: a battery cell having a first battery cell and a second battery cell connected to each other; a battery case configured to cover the battery cell; the first sealing wall is formed in the battery shell and positioned between the first battery monomer and the second battery monomer; the first sealing wall comprises a colloid formed between the first battery monomer and the second battery monomer, a first elastic ring configured to be sleeved on the battery core and positioned between the first battery monomer and the second battery monomer, and a first skirt edge formed on the inner surface of the battery shell and extending around the first elastic ring. The bipolar battery can effectively realize the sealing among the battery monomers.

Description

Bipolar battery

Technical Field

The present invention generally relates to the field of batteries, and more particularly to a bipolar battery.

Background

In the modern society, batteries have been widely used in various fields. The types of batteries are also varied depending on the application. Among them, a horizontal battery, which is one of the stack type batteries, is generally used as a large-capacity battery because it can include a plurality of cells, and is applicable to starting of automobiles, ships, construction machines, airplanes, locomotives, and the like, and also to various fields such as energy storage, backup power, forklifts, and the like.

In a stack type battery, a plurality of battery cells (also referred to as battery cells) are generally included, each of which includes a positive electrode plate, a negative electrode plate, and a separator therebetween. The same-polarity polar plates in the unit cells (namely the battery monomers) are connected in parallel, and the battery capacity is determined by the size, the parallel connection quantity and the like of the polar plates; the positive and negative poles of the adjacent battery cells are connected in series, and the total voltage of the battery is determined by the number of the battery cells connected in series. The electrode plate is composed of a current collector and an active material thereon. For example, the positive electrode plate is formed by coating a positive electrode active material on a current collector, and the negative electrode plate is formed by coating a negative electrode active material on a current collector.

For the stack type battery, the positive and negative electrode plates of the battery may be classified into a unipolar battery and a bipolar battery according to whether they share a current collector. In a unipolar battery, the current collectors of the positive and negative plates are separate, that is, the current collectors of the positive and negative plates are two separate components. The positive and negative plates of one single cell and the positive and negative plates of the other single cell in the unipolar battery are isolated from each other, and must be connected in series by additional welding, so that the process is complex and the reliability is poor. In the bipolar battery, the positive and negative plates share the same current collector, and the positive and negative plates sharing the same current collector are respectively positioned in different battery units. Therefore, it realizes the series connection between different battery cells by means of the current collectors without additional welding. Compared with a unipolar battery, the bipolar battery is more convenient and reliable to realize series connection.

At present, when manufacturing a battery, after the bipolar plate is mounted on a battery shell and a battery top cover is covered, two sealing platforms of the bipolar plate are extruded to form two sealing walls. The seal wall forms the glue injection groove with being located the glue groove intercommunication between battery top cap and the battery jar inner wall with battery jar inner wall sealing connection in the seal wall and the battery casing to accessible glue groove injection resin glues, so in order to realize the sealed between the adjacent battery monomer, prevents to take place to scurry liquid or scurry gas phenomenon between the adjacent battery monomer. However, the sealing method cannot effectively achieve the sealing between the adjacent battery cells, and three or more sealing platforms are required to be formed, so that the complete sealing between the adjacent battery cells is ensured more effectively.

Disclosure of Invention

One of the technical problems to be solved in the present invention is to overcome the deficiencies in the prior art, and to provide at least one bipolar battery, which is not only simple in process, efficient, low in cost, suitable for mass production, but also capable of effectively achieving the sealing between the adjacent battery cells of the battery core.

Some embodiments of the present invention provide a bipolar battery, comprising: a battery cell having at least one bipolar plate; a first elastomeric ring having a plurality of holes through its body disposed around the cell core and between the positive and negative plates of the bipolar plate; a battery well configured to receive the battery cell, wherein an inner surface of the battery well has a first skirt, and the first skirt is configured to extend along and engage the first resilient ring; and a battery cover configured to mate with the battery well, wherein an inner surface of the battery cover has a second skirt, and the second skirt is configured to extend along and engage the first resilient ring.

Some embodiments of the present invention provide a bipolar battery, comprising: a battery cell having a first battery cell and a second battery cell connected to each other; a battery case configured to cover the battery cell; and a first sealing wall formed in the battery shell and positioned between the first battery cell and the second battery cell; the first sealing wall comprises a colloid formed between the first battery monomer and the second battery monomer, a first elastic ring configured to be sleeved on the battery core and positioned between the first battery monomer and the second battery monomer, and a first skirt edge formed on the inner surface of the battery shell and extending around the first elastic ring.

The bipolar battery of the present invention can be manufactured by a method comprising: providing a battery core, wherein the battery core comprises a first battery cell and a second battery cell which are connected with each other; sleeving an elastic ring at the connection position of the first battery cell and the second battery cell of the battery core; placing the battery core into a battery jar, wherein the elastic ring sleeved on the battery core is matched with a first skirt edge formed on the inner surface of the battery jar; and matching a battery cover with the battery jar to form a battery shell for coating the battery core, wherein the elastic ring piece sleeved on the battery core is matched with a second skirt edge formed on the inner surface of the battery cover, and when the battery cover is matched with the battery jar, the first skirt edge of the battery jar and the second skirt edge of the battery cover are matched with each other to form an annular space.

The foregoing summary and the following detailed description are not intended to limit the present invention to any particular embodiment, but are merely intended to describe some embodiments of the present invention

According to the utility model provides a bipolar battery can realize sealing between the adjacent battery monomer each other effectively to prevent effectively to scurry liquid or scurry gas phenomenon between the adjacent battery monomer.

Drawings

For a better understanding of the nature of some embodiments of the present invention and the technical problems to be solved, reference will be made to the following embodiments taken in conjunction with the accompanying drawings. In the drawings, like reference numerals refer to like components unless the context clearly dictates otherwise.

Fig. 1 is a schematic perspective view of a battery cell according to some embodiments of the present invention;

fig. 2A is a schematic cross-sectional view of a battery cell according to some embodiments of the present invention;

fig. 2B is a schematic front view of each single battery in the battery core according to some embodiments of the present invention, which shows the connection relationship between the positive and negative unipolar plates and the three bipolar plates;

fig. 2C is a schematic top view of each battery cell of the battery cell according to some embodiments of the present invention;

FIG. 3A is a schematic perspective view of an elastic ring being sleeved over a battery cell according to some embodiments of the invention;

fig. 3B is a side view schematic of an elastic collar disposed over a battery cell in accordance with some embodiments of the present invention;

fig. 3C is a schematic cross-sectional view of an elastic collar disposed over a battery cell in accordance with some embodiments of the invention;

fig. 4 is a perspective view of an elastic ring according to some embodiments of the present invention;

fig. 5A is a schematic perspective view of a battery cell in combination with a battery can and a battery cover in accordance with some embodiments of the present invention;

fig. 5B is a schematic side view of a battery cell in combination with a battery can and a battery cover, according to some embodiments of the invention;

FIG. 5C is a cross-sectional view taken along line A-A in FIG. 5B;

fig. 6A is a schematic perspective view of a battery cell in combination with a battery can and a battery cover according to some embodiments of the present invention;

FIG. 6B is a cross-sectional view taken along line B-B of FIG. 6A;

FIG. 6C is a cross-sectional view taken along line C-C of FIG. 6A;

fig. 7 is a schematic cross-sectional view of resin paste injected into a battery can, in accordance with some embodiments of the present invention;

fig. 8 is a perspective view of a busbar and external terminals coupled to a battery cell according to some embodiments of the present invention;

fig. 9 is a schematic perspective view of an end cap and a glue hole cover mated with a battery jar and a battery cover in accordance with some embodiments of the present invention;

fig. 10 is a schematic perspective view of the acid inlet cover, the air release valve and the air release valve cover being mated with the acid inlet and the acid outlet according to some embodiments of the present invention;

fig. 11A is a schematic perspective view of a bipolar battery according to some embodiments of the present invention; and

fig. 11B is a schematic cross-sectional view of a bipolar battery according to some embodiments of the present invention.

Detailed Description

The following disclosure provides many different embodiments, or examples, for implementing different features of the provided subject matter. Specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to be limiting. In the present disclosure, references in the following description to the formation of a first feature over or on a second feature may include embodiments in which the first feature is formed in direct contact with the second feature, and may also include embodiments in which additional features may be formed between the first and second features, such that the first and second features may not be in direct contact. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

Embodiments of the present invention are discussed in detail below. It should be appreciated, however, that the present invention provides many applicable concepts that can be embodied in a wide variety of specific contexts. The particular embodiments discussed are merely illustrative and do not limit the scope of the invention.

The bipolar battery needs to form a sealing structure between the adjacent battery monomers of the battery core of the bipolar battery so as to realize the sealing between the adjacent battery monomers and prevent the liquid leakage or gas leakage between the adjacent battery monomers. However, in the prior art, multiple sealing structures are generally required to ensure a perfect seal between adjacent cells.

For the sake of clarity, the bipolar battery 1 of the invention is explained below in general terms of a method of manufacture.

First, as shown in fig. 1, a battery cell 10 is provided, and the battery cell 10 has

battery cells

11, 12, 13, 14 arranged in a row and connected to each other. That is, there are four battery cells in this embodiment. Of course, the battery cell 10 may have other numbers of battery cells (e.g., two), as disclosed in CN202011195672.4 patent application.

As shown in fig. 2A, the battery cell 10 has a plurality of electrode plates 15 (including a bipolar plate, a positive monopolar plate, and a negative monopolar plate) stacked on each other, and the plurality of electrode plates 15 stacked on each other are fixed by a cover plate 17 and a pressure frame 18. The detailed structure and manufacturing method of the battery cell 10 can be found in the disclosure of the patent application CN 202011195672.4. The following description focuses on the content.

Since the battery cell 10 has a plurality of electrode plates 15 (including bipolar plates, positive monopolar plates, and negative monopolar plates) stacked on each other, the

battery cells

11, 12, 13, and 14 also include the bipolar plates, the positive monopolar plates, and the negative monopolar plates stacked on each other. In order to more clearly understand the arrangement (stack) of these bipolar plates and positive and negative unipolar plates, see fig. 2B and 2C (fig. 2B and 2C show only a part of the plurality of plates 15 stacked on each other as an example to illustrate the positional relationship therebetween), the positive unipolar plate 151 and the negative plate 1522 of the bipolar plate 152 are contained in the cell 11 (with the separator 150 disposed therebetween, the same applies below); the positive plate 1521 of the bipolar plate 152 and the negative plate 1532 of the bipolar plate 153 are contained in the cell 12; positive plate 1531 of bipolar plate 153 and negative plate 1542 of bipolar plate 154 are contained in cell 13; the positive plate 1541 and the negative unipolar plate 155 of the bipolar plate 154 are contained within the cells 14.

It can be understood from the above that each adjacent battery cell has at least one common bipolar plate, and the two adjacent battery cells are separated by the connecting portion of the positive and negative plates of the bipolar plate, and are electrically connected through the connecting portion. In some embodiments of the present invention, the

adjacent battery cells

11 and 12 have the bipolar plate 152 at the same time, the connection portion 1520 connecting the negative plate 1522 of the bipolar plate 152 and the positive plate 1521 is located between the

adjacent battery cells

11 and 12, and the

adjacent battery cells

11 and 12 are electrically connected to each other via the connection portion 1520. In some embodiments of the present invention, the

adjacent battery cells

12 and 13 have the bipolar plate 153 at the same time, the connection portion 1530 connecting the negative plate 1532 of the bipolar plate 153 and the positive plate 1531 is located between the

adjacent battery cells

12 and 13, and the

adjacent battery cells

12 and 13 are electrically connected to each other via the connection portion 1530. In some embodiments of the present disclosure, the

adjacent battery cells

13 and 14 have the bipolar plate 154 at the same time, the connection portion 1540 connecting the negative plate 1542 of the bipolar plate 154 and the positive plate 1541 is located between the

adjacent battery cells

13 and 14, and the

adjacent battery cells

13 and 14 are electrically connected to each other via the connection portion 1540.

Referring again to fig. 2A, a plurality of electrode plates 15 stacked on each other in the battery cell 10 constitute the

battery cells

11, 12, 13, 14 connected to each other. In some embodiments of the present invention, a glue injection groove 111 is formed at one end adjacent to the battery cell 11, a glue injection groove 112 is formed between the battery cell 11 and the battery cell 12, a glue injection groove 131 is formed between the battery cell 13 and the battery cell 14, and a glue injection groove 141 is formed at one end adjacent to the battery cell 14; in some embodiments of the present invention, the glue injection groove 111 is formed by the end portions of the unipolar plates and/or the bipolar plates stacked in the battery cells 11, the glue injection groove 112 is formed by the connecting portions of the bipolar plates commonly owned by the adjacent battery cells 11, 12 and the end portions of the unipolar plates stacked together, the glue injection groove 121 is formed by the connecting portions of the bipolar plates commonly owned by the adjacent battery cells 12, 13 and the end portions of the unipolar plates stacked together, the glue injection groove 131 is formed by the connecting portions of the bipolar plates commonly owned by the adjacent battery cells 13, 14 and the end portions of the unipolar plates stacked together, and the glue injection groove 141 is formed by the end portions of the unipolar plates and/or the bipolar plates stacked together in the battery cells 14. In some embodiments of the present disclosure, one end of the battery cell 11 has an outwardly extending wire 118 and one end of the battery cell 14 has an outwardly extending wire 148.

As shown in fig. 3A-3C,

elastic rings

21, 22, 23, 24, 25 are provided and sleeved on the battery cell 10; as shown in fig. 4, in some embodiments of the present invention, the

elastic ring

21, 22, 23, 24, 25 has holes 210, 220, 230, 240, 250 penetrating its body; in some embodiments of the present invention, the

elastic rings

21, 22, 23, 24, 25 comprise a rubber material or a foamed elastic material.

Referring to fig. 3A, 3B and 3C, the elastic ring 21 is sleeved on the battery cell 10 and adjacent to the end 110 of the battery cell 11, and in some embodiments of the present invention, the elastic ring 21 may be substantially aligned with the glue injection groove 111.

The elastic ring 22 is sleeved on the battery cell 10 and located between the

adjacent battery cells

11 and 12, and in some embodiments of the present invention, the elastic ring 22 may be approximately aligned with the glue injection groove 112; further, since the elastic ring 22 is fitted around the battery cell 10 and located between the

adjacent battery cells

11 and 12, the elastic ring 22 is disposed around the connection portion of the bipolar plate commonly owned by the adjacent battery cells 11 and 12 (i.e., between the positive electrode plate and the negative electrode plate of the bipolar plate). In other words, the elastic ring 22 is located approximately at the joint of the bipolar plates commonly owned by the

adjacent unit cells

11 and 12.

The elastic ring 23 is sleeved on the battery core 10 and located between the

adjacent battery cells

12 and 13, and in some embodiments of the present invention, the elastic ring 23 may be approximately aligned with the glue injection groove 121; further, since the elastic ring 23 is fitted around the battery cell 10 and is located between the

adjacent unit cells

12 and 13, the elastic ring 23 is disposed around a connection portion of the bipolar plate commonly owned by the adjacent unit cells 12 and 13 (i.e., between the positive electrode plate and the negative electrode plate of the bipolar plate). In other words, the elastic ring 23 is located approximately at the joint of the bipolar plates commonly owned by the

adjacent unit cells

12 and 13.

The elastic ring 24 is sleeved on the battery core 10 and located between the

adjacent battery cells

13 and 14, and in some embodiments of the present invention, the elastic ring 24 may be approximately aligned with the glue injection groove 131; further, since the elastic ring 24 is fitted around the battery cell 10 and is located between the

adjacent unit cells

13 and 14, the elastic ring 24 is disposed around the connection portion of the bipolar plate that is commonly owned by the adjacent unit cells 13 and 14 (i.e., between the positive electrode plate and the negative electrode plate of the bipolar plate). In other words, the elastomeric ring 24 is located substantially at the junction of the bipolar plates that are commonly owned by

adjacent cells

13 and 14.

The elastic ring 25 is sleeved on the battery cell 10 and adjacent to the end 140 of the battery cell 14, and in some embodiments, the elastic ring 25 may be substantially aligned with the glue injection groove 141.

Next, as shown in fig. 5A, 5B, and 5C, a battery container 31 and a battery cover 32 are provided. Fig. 6A, 6B, and 6C show an embodiment of the present invention in which the battery cell 10 is inserted into the battery container 31 and the battery cover 32 is sealed. In some embodiments of the present invention, the battery jar 31 and the battery cover 32 are part of the battery housing of the bipolar battery of the present invention. The battery cavity 31 is configured to accommodate the battery cell 10 therein, and in some embodiments of the present invention, when the battery cell 10 is accommodated in the battery cavity 31, the opposite side surfaces 101 and 103 of the battery cell 10 and the bottom surface 105 thereof are covered by the battery cavity 31 (see fig. 6C).

The inner surface of the battery container 31 has a plurality of

skirt rims

311, 313, 315, 317 and 319 protruding and extending on the inner surface, when the battery core 10 is accommodated in the battery container 31, the skirt rims 311, 313, 315, 317 and 319 of the battery container 31 respectively substantially surround the

elastic rings

21, 22, 23, 24 and 25 sleeved on the battery core 10, and are mutually matched with the

elastic rings

21, 22, 23, 24 and 25 (refer to fig. 6B and 6C); in certain embodiments of the present invention, skirts 311, 313, 315, 317 and 319 are configured to engage the

resilient rings

21, 22, 23, 24, 25 on the battery cell 10; in certain embodiments of the present invention, skirts 311, 313, 315, 317 and 319 are configured such that

resilient rings

21, 22, 23, 24, 25 are embedded in

skirts

311, 313, 315, 317 and 319. Since the

elastic rings

21, 22, 23, 24, 25 have elasticity, they are elastically deformed when the

skirts

311, 313, 315, 317, and 319 are inserted, thereby contributing to the formation of a good sealing structure.

In some embodiments of the present invention, the battery cover 32 is configured to interact with the battery well 31, and in some embodiments, the battery cover 32 can be depressed to engage the battery well 31. In some embodiments of the present invention, the battery cover 32 and the battery container 31 may be heat-sealed and welded to each other. After the battery cover 32 is fitted to the battery container 31 that has received the battery cell 10, the top surface 107 of the battery cell 10 is covered by the battery cover 32 (see fig. 6C).

The inner surface of the battery cover 32 has a plurality of

skirts

321, 323, 325, 327 and 329 protruding and extending on the inner surface, when the battery cover 32 is matched with the battery container 31 accommodating the battery core 10, the

skirts

321, 323, 325, 327 and 329 of the battery cover 32 respectively and approximately surround the

elastic rings

21, 22, 23, 24 and 25 sleeved on the battery core 10, and are matched with the

elastic rings

21, 22, 23, 24 and 25 (refer to fig. 6B and 6C); in certain embodiments of the present invention, the

skirts

321, 323, 325, 327 and 329 are configured to engage the

resilient rings

21, 22, 23, 24, 25 on the battery cell 10; in certain embodiments of the present invention, the

skirts

321, 323, 325, 327 and 329 are configured such that the

elastic rings

21, 22, 23, 24 and 25 are embedded in the

skirts

321, 323, 325, 327 and 329.

In some embodiments of the present invention, each

skirt

311, 313, 315, 317 and 319 of the battery container 31 has a groove structure with a U-shaped cross section, and each

skirt

321, 323, 325, 327 and 329 of the battery cover 32 has a groove structure with a U-shaped cross section. When the battery cover 32 and the battery container 31 are matched with each other, the

skirts

311, 313, 315, 317 and 319 of the battery container 31 are respectively matched with the

skirts

321, 323, 325, 327 and 329 of the battery cover 32, and the

skirts

311, 313, 315, 317 and 319 which are matched with each other up and down are matched with the

skirts

321, 323, 325, 327 and 329 to form a plurality of annular spaces together, as shown in fig. 6C, the skirt 315 of the battery container 31 and the skirt 325 of the battery cover 32 are matched with each other and form an annular space together.

The bottom surface 310 of the battery well 31 has a plurality of

glue injection holes

3115, 3135, 3155, 3175, 3195 (see fig. 5B, 5C), and in some embodiments of the invention, the

glue injection holes

3115, 3135, 3155, 3175, 3195 are positioned to substantially align with the

skirts

311, 313, 315, 317, 319 of the battery well 31, respectively. The battery cover 3 has a plurality of pairs of

glue holes

3215, 3235, 3255, 3275, 3295 (see fig. 5A, 5B, 5C), and in some embodiments, the pairs of

glue holes

3215, 3235, 3255, 3275, 3295 are positioned to approximately align with the

skirts

311, 313, 315, 317, 319 of the battery jar 31. Furthermore, as described above, the

skirts

311, 313, 315, 317 and 319 and the

skirts

321, 323, 325, 327 and 329 which are engaged with each other at the top and bottom can be engaged with each other to form a plurality of annular spaces, and the

glue injection holes

3115, 3135, 3155, 3175 and 3195 and the paired

glue discharge holes

3215, 3235, 3255, 3275 and 3295 are configured to communicate with the annular spaces formed by the

skirts

311, 313, 315, 317 and 319 and the

skirts

321, 323, 325, 327 and 329, respectively.

As shown in fig. 6A and 6B, in some embodiments of the present invention, the battery container 31 has

acid inlets

312, 314, 316, 318, and the battery cover 32 has

acid outlets

322, 324, 326, 328.

As shown in fig. 7, resin paste is injected from the

paste injection holes

3115, 3135, 3155, 3175, 3195 of the battery chamber 31. In some embodiments of the present invention, resin adhesive is injected into the annular space formed by the skirt 311 of the battery container 31 and the skirt 321 of the battery cover 32 from the adhesive injection hole 3115, and the resin adhesive can enter the adhesive injection groove 111 adjacent to the end 110 of the battery cell 11 through the hole 210 (refer to fig. 4) in the elastic ring 21 which is matched with the skirt 311 of the battery container 31 and the skirt 321 of the battery cover 32; further, the excess resin paste may overflow through the pair of paste outlet holes 3215. The glue outlets 3215 are arranged in pairs, so that the injected resin glue can flow into the annular space and/or the glue injection groove 111 evenly and quickly. After the injection of the resin is completed, the injected resin and the elastic ring 21, the skirt 311 of the battery container 31 and the skirt 321 of the battery cover 32 are configured to form a sealing wall adjacent to the end 110 of the battery cell 11.

In some embodiments of the present invention, resin adhesive is injected into the annular space formed by the skirt 313 of the battery container 31 and the skirt 323 of the battery cover 32 from the adhesive injection hole 3135, and the resin adhesive can enter the adhesive injection groove 112 between the

battery cells

11 and 12 through the hole 220 (refer to fig. 4) in the elastic ring 22 engaged with the skirt 313 of the battery container 31 and the skirt 323 of the battery cover 32; further, the excess resin paste may overflow through the pair of paste outlet holes 3235. Since the glue outlet holes 3235 are arranged in pairs, the injected resin glue can flow into the annular space and/or the glue injection groove 112 evenly and rapidly. After the injection of the resin is completed, the injected resin and the elastic ring 22, the skirt 313 of the battery container 31 and the skirt 323 of the battery cover 32 are configured to form a sealing wall between the

battery cells

11 and 12.

In some embodiments of the present invention, resin adhesive is injected into the annular space formed by the skirt 315 of the battery container 31 and the skirt 325 of the battery cover 32 from the adhesive injection hole 3155, and the resin adhesive can enter the adhesive injection groove 121 located between the battery cell 12 and the battery cell 13 through the hole 230 (refer to fig. 4) in the elastic ring 23 which is matched with the skirt 315 of the battery container 31 and the skirt 325 of the battery cover 32; further, the excess resin paste may overflow through the pair of paste outlet holes 3255. Since the glue outlet holes 3255 are arranged in pairs, the injected resin glue can flow into the annular space and/or the glue injection groove 121 evenly and rapidly. After the injection of the resin is completed, the injected resin and the elastic ring 23, the skirt 315 of the battery container 31 and the skirt 325 of the battery cover 32 are configured to form a sealing wall between the

battery cells

12 and 13.

In some embodiments of the present invention, resin adhesive is injected into the annular space formed by the skirt 317 of the battery container 31 and the skirt 327 of the battery cover 32 from the adhesive injection hole 3175, and the resin adhesive can enter the adhesive injection groove 131 between the battery cell 11 and the battery cell 12 through the hole 240 (refer to fig. 4) in the elastic ring 24 which is matched with the skirt 317 of the battery container 31 and the skirt 327 of the battery cover 32; further, the excess resin paste may overflow through the pair of paste outlet holes 3275. The glue outlet holes 3275 are arranged in pairs, so that the injected resin glue can flow into the annular space and/or the glue injection groove 131 evenly and rapidly. After the injection of the resin is completed, the injected resin and the elastic ring 24, the skirt 317 of the battery container 31 and the skirt 327 of the battery cover 32 are configured to form a sealing wall between the battery cell 13 and the battery cell 11 together.

In some embodiments of the present invention, resin adhesive is injected into the annular space formed by the skirt 319 of the battery container 31 and the skirt 329 of the battery cover 32 from the adhesive injection hole 3195, and the resin adhesive can enter the adhesive injection groove 141 adjacent to the end 140 of the battery cell 14 through the hole 250 (refer to fig. 4) in the elastic ring 25 which is matched with the skirt 319 of the battery container 31 and the skirt 329 of the battery cover 32; further, the excess resin paste may overflow through the pair of paste outlet holes 3295. The glue outlet holes 3295 are arranged in pairs, so that the injected resin glue can flow into the annular space and/or the glue injection groove 141 evenly and rapidly. After the injection of resin is completed, the injected resin and the elastic ring 25, the skirt 319 of the battery container 31 and the skirt 329 of the battery cover 32 are configured to form a sealing wall adjacent to the end 140 of the battery cell 14.

The sealing wall adjacent to the end 110 of the battery cell 11 and the sealing wall between the battery cell 11 and the battery cell 12 form a sealed space containing the battery cell 11 together with the battery can 32 and the battery cover 31, the sealing wall between the battery cell 11 and the battery cell 12 and the sealing wall between the battery cell 12 and the battery cell 13 form a sealed space containing the battery cell 12 together with the battery container 32 and the battery cover 31, the sealing wall between the battery cell 12 and the battery cell 13 and the sealing wall between the battery cell 13 and the battery cell 14 form a sealed space containing the battery cell 13 together with the battery container 32 and the battery cover 31, the sealing wall between the

battery cells

13 and 14 and the sealing wall adjacent to the end 140 of the battery cell 14 form a sealed space containing the battery cell 14 together with the battery can 32 and the battery cover 31. The sealed spaces are not in fluid communication with each other due to the obstruction of the sealing walls.

As shown in fig. 8, bus bars 41, 45 and

terminals

43, 47 are further provided. In some embodiments of the present invention, the terminal 43 has an L-shaped structure 431, one end of the L-shaped structure 431 is connected to the bus bar 41, and the other end of the L-shaped structure 431 has an external connection end portion 433 protruding upward; in some embodiments of the present invention, the terminal 47 has an L-shaped structure 471, one end of the L-shaped structure 471 is connected to the bus bar 41, and the other end of the L-shaped structure 471 has an external connection end portion 4 protruding upward.

The interconnected bus bars 41 and terminals 43 are disposed adjacent the ends 110 of the cells 11 and are electrically connected with outwardly extending wires 118; in some embodiments of the present invention, the bus bar 41 and the terminal 43 are welded to the wire 118. The interconnected buss bars 45 and terminals 47 are disposed adjacent the ends 140 of the cells 14 and are electrically connected to the outwardly extending wires 148; in some embodiments of the present invention, the bus bar 45 is welded to the terminal 47 and the wire 148. In addition, the external connection end portion 433 of the terminal 43 is configured to protrude upward from the battery cover 31, and thus, the external connection end portion 433 of the terminal 43 may be exposed outward from the battery cover 31; the circumscribed end 473 of the terminal 47 is configured to protrude upward from the battery cover 31, and thus, the circumscribed end 473 of the terminal 47 can be exposed outward from the battery cover 31.

As shown in fig. 9, end caps 35, 37 and a plurality of glue holes 38 are further provided. The end cap 35 is configured to cooperate with the battery can 31 and the battery cover 32 to cover one end of the battery cell 10. in some embodiments, the end cap 35 covers the end 110 of the battery cell 11 of the battery cell 10 and simultaneously covers the bus bar 41 adjacent to the end 110 of the battery cell 11. The end cap 37 is configured to cooperate with the battery can 31 and the battery cover 32 to cover the other end of the battery cell 10. in some embodiments, the end cap 37 covers the end 140 of the battery cell 14 of the battery cell 10 and simultaneously covers the bus bar 45 adjacent to the end 140 of the battery cell 14.

In addition, the glue hole covers 38 are configured to cover the

glue injection holes

3115, 3135, 3155, 3175, 3195 and the pair of glue outlet holes 3215, 3235, 3255, 3275, 3295.

After the end caps 35 and 37 and the glue holes 38 respectively cover the two ends of the battery cell 10 and the glue holes 3115, 3135, 3155, 3175, 3195 and the glue holes 3215, 3235, 3255, 3275, 3295, acid solution is injected into the battery jar 31 through the

acid injection ports

312, 314, 316, 318. In some embodiments of the present invention, the acid solution is injected into the sealed space containing the battery cell 11 through the acid injection port 312, and the acid solution injected into the sealed space cannot flow out further because the space has the sealing wall adjacent to the end portion 110 of the battery cell 11 and the sealing wall located between the battery cell 11 and the battery cell 12, and cannot flow into the sealed space containing the battery cell 12. In some embodiments of the present invention, the acid solution is injected into the sealed space containing the battery cell 12 through the acid injection port 314, and the acid solution injected into the sealed space cannot further flow into the sealed space containing the battery cell 11 and/or the sealed space containing the battery cell 13 because the sealed space has the sealing wall between the battery cell 11 and the battery cell 12 and the sealing wall between the battery cell 12 and the battery cell 13. In some embodiments of the present invention, the acid solution is injected into the sealed space containing the battery cell 13 through the acid injection port 316, and the acid solution injected into the sealed space cannot further flow into the sealed space containing the battery cell 12 and/or the sealed space containing the battery cell 14 because the sealed space has the sealing wall between the battery cell 12 and the battery cell 13 and the sealing wall between the battery cell 13 and the battery cell 14. In some embodiments of the present invention, the acid solution is injected into the sealed space containing the battery cell 14 through the acid injection port 318, and the acid solution injected into the sealed space cannot further flow out and/or into the sealed space containing the battery cell 13 because the space has the sealing wall adjacent to the end 140 of the battery cell 14 and the sealing wall between the battery cell 13 and the battery cell 14.

As shown in fig. 10, an acid inlet cover 70, a release valve 71, and a release valve cover 72 are further provided. After the acid solution is injected into the battery container 31 through the

acid injection ports

312, 314, 316 and 318, the

acid injection ports

312, 314, 316 and 318 are respectively covered by the plurality of acid inlet covers 70, the plurality of air release valves 71 are respectively installed into the

acid outlet ports

322, 324, 326 and 328, and the air release valve covers 72 and the air release valves 71 are matched with each other.

FIG. 11A shows a bipolar battery 1 manufactured by the above-described manufacturing method, and FIG. 11B shows a cross-sectional view of the bipolar battery 1 shown in FIG. 11A. In some embodiments of the present invention, the resin adhesive injected into the adhesive injection groove 111 and the elastic ring 21, the skirt 311 of the battery container 31 and the skirt 321 of the battery cover 32 are configured to form a sealing wall adjacent to the end 110 of the battery cell 11; the resin adhesive injected into the adhesive injection groove 112 and the elastic ring 22, the skirt 313 of the battery container 31 and the skirt 323 of the battery cover 32 are configured to form a sealing wall between the battery cell 11 and the battery cell 12 together; the resin adhesive injected into the adhesive injection groove 121 and the elastic ring 23, the skirt 315 of the battery container 31 and the skirt 325 of the battery cover 32 are configured to form a sealing wall between the battery unit 12 and the battery unit 13 together; the resin adhesive injected into the adhesive injection groove 131, the elastic ring 24, the skirt 317 of the battery container 31 and the skirt 327 of the battery cover 32 are configured to form a sealing wall between the battery monomer 13 and the battery monomer 14 together; the resin adhesive injected into the adhesive injection groove 141 and the elastic ring 25, the skirt 319 of the battery container 31 and the skirt 329 of the battery cover 32 are configured to form a sealing wall adjacent to the end 140 of the battery cell 14, and the sealing wall is configured to seal the adjacent battery cells to prevent liquid leakage or gas leakage between the adjacent battery cells.

According to the above, the embodiments of the present invention can effectively seal the adjacent battery cells in the battery core of the bipolar battery, and reliably prevent the liquid leakage or the gas leakage between the adjacent battery cells.

Reference throughout this specification to "some embodiments," "one embodiment," "another example," "an example," "a specific example," or "some examples" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. Thus, throughout the specification, descriptions appear, for example: "in some embodiments," "in an embodiment," "in one embodiment," "in another example," "in one example," "in a particular example," or "by example," which do not necessarily refer to the same embodiment or example of the invention.

While the invention has been described and illustrated with reference to specific embodiments thereof, these descriptions and illustrations do not limit the invention. It will be clearly understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the true spirit and scope of the invention. The figures are not necessarily to scale. Due to variations in the manufacturing process and the like, there may be a difference between the art reproduction in the present invention and the actual equipment. There may be other embodiments of the invention that are not specifically illustrated. The specification and drawings are to be regarded in an illustrative rather than a restrictive sense. Modifications may be made to adapt a particular situation, material, composition of matter, substance, method or process to the objective, spirit and scope of the present invention. All such modifications are intended to fall within the scope of the present invention.

Claims

1. A bipolar battery, comprising:

a battery cell having at least one bipolar plate;

a first elastic ring having a plurality of holes penetrating through a body thereof, and disposed around the battery cell and between the positive and negative plates of the bipolar plate;

a battery well configured to receive the battery cell, wherein an inner surface of the battery well has a first skirt, and wherein the first skirt is configured to extend along and mate with the first resilient ring; and

a battery cover configured to mate with the battery well, wherein an inner surface of the battery cover has a second skirt, and wherein the second skirt is configured to extend along and mate with the first resilient ring.

2. The bipolar battery according to claim 1, wherein the first elastic ring comprises a rubber material or a foamed elastic material.

3. The bipolar battery according to claim 1, wherein the first skirt has a groove configuration and the second skirt also has a groove configuration.

4. The bipolar battery of claim 3, wherein the first skirt and the second skirt are configured to mate with each other, and wherein the groove structure of the first skirt and the groove structure of the second skirt mate with each other to form an annular space.

5. The bipolar battery according to claim 1, wherein the battery well has a first through hole and the battery cover has a second through hole, wherein the first through hole is positioned in alignment with the first skirt of the battery well and the second through hole is positioned in alignment with the second skirt of the battery cover.

6. The bipolar battery according to claim 5, wherein battery cover further has a third through hole, and wherein the third through hole is positioned in alignment with the second skirt of the battery cover.

7. The bipolar battery according to claim 1, wherein the battery well is configured to cover first and second surfaces of the battery cell opposite to each other and a third surface connected to the first and second surfaces, and wherein the battery cover is configured to cover a fourth surface of the battery cell opposite to the third surface.

8. The bipolar battery according to claim 7, further comprising two end caps configured to mate with the battery well and the battery cover and configured to cover a first end face and a second end face of the battery cell opposite the first end face, respectively.

9. The bipolar battery according to claim 8, further having a first bus bar and a first terminal connected to the first bus bar, and a second bus bar and a second terminal connected to the second bus bar, wherein the first bus bar is adjacent to the first end face of the battery cell, the second bus bar is adjacent to the second end face of the battery cell, and the first and second bus bars are electrically connected to the battery cell and covered by the two end caps, wherein the first terminal and the second terminal are exposed from the battery cover.

10. The bipolar battery according to claim 9, wherein the first terminal further has an L-shaped structure having one end connected with the first bus bar and the other end configured to expose the first terminal from the battery cover, wherein the second terminal further has an L-shaped structure having one end connected with the second bus bar and the other end configured to expose the second terminal from the battery cover.

11. The bipolar battery according to claim 1, further comprising a second resilient ring having a plurality of holes through its body and disposed around the battery core adjacent a first end face of the battery core, and a third resilient ring having a plurality of holes through its body and disposed around the battery core adjacent a second end face opposite the first end face of the battery core, and wherein the battery well has a second skirt protruding from its inner surface adjacent the first end face of the battery core and configured to extend along the second resilient ring and engage the second resilient ring, and a third skirt adjacent the second end face of the battery core and configured to extend along the third resilient ring and engage the third resilient ring, wherein the battery cover has a fourth and a fifth resilient ring protruding from its inner surface, the fourth skirt is adjacent the first end face of the battery cell and is configured to extend along and engage the second resilient loop, and the fifth skirt is adjacent the second end face of the battery cell and is configured to extend along and engage the third resilient loop.

12. The bipolar battery according to claim 11, wherein the battery can has a fourth through hole and a fifth through hole, and the battery cover has a sixth through hole and a seventh through hole, wherein the fourth through hole and the fifth through hole are positioned to align with the second skirt and the third skirt of the battery can, respectively, and the sixth through hole and the seventh through hole are positioned to align with the fourth skirt and the fifth skirt of the battery cover, respectively.

13. The bipolar battery according to claim 11, wherein the second skirt has a groove structure and the third skirt has a groove structure, the fourth skirt has a groove structure and the fifth skirt has a groove structure.

14. A bipolar battery, comprising:

a battery cell having a first battery cell and a second battery cell connected to each other;

a battery case configured to cover the battery cell; and

a first sealing wall formed in the battery case and located between the first battery cell and the second battery cell;

the first sealing wall comprises a colloid formed between the first battery monomer and the second battery monomer, a first elastic ring configured to be sleeved on the battery core and positioned between the first battery monomer and the second battery monomer, and a first skirt edge formed on the inner surface of the battery shell and extending around the first elastic ring.

15. The bipolar battery of claim 14, wherein the first skirt is configured to engage the first resilient ring.

16. The bipolar battery according to claim 14, wherein the first sealing wall is configured to achieve a seal between the first battery cell and the second battery cell.

17. The bipolar battery according to claim 14, wherein the battery housing has a first surface and a second surface opposite the first surface, wherein the first surface has a first through hole and the second surface has a second through hole, wherein the first through hole is positioned to align with the first skirt of the battery housing, and the second through hole is positioned to align with the first skirt of the battery housing.

18. The bipolar battery according to claim 14, wherein the battery housing has a first surface and a second surface opposite the first surface, wherein the first surface of the battery housing has a first pair of through-holes and the second surface of the battery housing has a second through-hole, wherein the first pair of through-holes are positioned to align with the first skirt of the battery housing, respectively, and the second through-hole is positioned to align with the first skirt of the battery housing.

19. The bipolar battery according to claim 14, further comprising a second sealing wall, wherein the second sealing wall is formed in the battery case adjacent to the first end of the battery cell and comprises a gel formed at the first end, a second elastic ring configured to fit around the battery cell adjacent to the first end of the battery cell, and a second skirt formed on an inner surface of the battery case and extending around the second elastic ring.

20. The bipolar battery according to claim 19, wherein the battery housing has a first surface and a second surface opposite the first surface, the first surface of the battery housing has a third pair of through-holes and the second surface of the battery housing has a fourth through-hole, wherein the third pair of through-holes are positioned to align with the second skirt of the battery housing, respectively, and the fourth through-hole is positioned to align with the second skirt of the battery housing.