CN212434740U

CN212434740U - Battery device

Info

Publication number: CN212434740U
Application number: CN202021159018.3U
Authority: CN
Inventors: 朱效敏; 杨裕生; 王振波
Original assignee: Shandong Niuqianli Power Technology Co ltd
Current assignee: Shandong Niuqianli Power Technology Co ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-01-29
Anticipated expiration: 2030-06-19

Abstract

The utility model discloses a battery device. The device includes casing and utmost point crowd, the casing includes the battery jar, the battery jar has a plurality of cavities that set up side by side, separate by the battery jar between two adjacent cavities, the casing is held including relative first end and the second that sets up, the cavity link up first end and second end, it seals to all be equipped with the battery jar at first end and second end, utmost point crowd is located the cavity, utmost point crowd includes the positive plate, the negative plate and the baffle that is located between positive plate and the negative plate, positive plate and negative plate all have utmost point ear, series connection between the utmost point crowd in the different cavities, utmost point crowd in two cavities of direct series connection, they are located the opposite polarity of the utmost point ear of the same end of casing, the series busbar of series connection utmost point crowd is arranged in the battery jar and is sealed the outside.

Description

Battery device

Technical Field

The utility model relates to an energy conversion technology field, more specifically relates to a battery device.

Background

A lead-acid battery is a secondary battery with electrodes mainly made of lead and its oxide and electrolyte solution of sulfuric acid. And a separator is arranged between the anode and the cathode and used for preventing the anode and the cathode from short circuit and storing electrolyte. In a fully charged state of the lead-acid battery, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is spongy lead; in the fully discharged state, the main components of the positive electrode and the negative electrode are lead sulfate.

In general, a lead acid battery includes one or more pole groups arranged in parallel. Each of the electrode groups includes a plurality of positive electrode plates, negative electrode plates, and separators. Different pole groups are connected in series. In the existing lead-acid battery, the tabs of the positive plates and the tabs of the negative plates of different electrode groups are led out towards the same side of the lead-acid battery. Due to the influence of the potential difference from the lug to the bottom of the polar plate, the utilization rate of the active material close to the lug is higher, and the active material far away from the lug is increased in charge-discharge reaction resistance and lower in the utilization rate of the active material due to the fact that the active material has more physical resistance of the upper half part of a grid in the charge-discharge process. Therefore, the positive active material at the part of the electrode close to one side of the tab is easy to be argillized and fall off, and the negative active material at the part far away from one side of the tab is easy to be sulfated in the use process of the battery. Therefore, the deviation of the tab position of the electrode plate to one end of the entire electrode group causes the uneven utilization rate of the active material of the battery, and the shorter the battery life, and the more the battery with the higher the electrode group height, the more serious the problem caused by this structure.

In addition, the resistivity of lead is 13 times that of copper and more than 7 times that of aluminum, and the density of lead is high, and the conductivity of lead is only 6.4% of that of copper and 3.1% of that of aluminum by the same mass. Therefore, the bus bar material which only serves as a conductor in the lead-acid battery structure is replaced by the material with high conductivity from lead, which is beneficial to improving the specific energy and the large-current charging and discharging capacity of the battery.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a new technical scheme of battery device.

According to a first aspect of the present invention, a battery device is provided. The battery device comprises a shell and a pole group, wherein the shell comprises a battery jar, the battery jar is provided with a plurality of cavities which are arranged in parallel, two adjacent cavities are separated by a battery jar partition, the housing includes a first end and a second end disposed opposite each other, the chamber extending through the first end and the second end, battery jar seals are arranged at the first end and the second end, the pole group is positioned in the cavity, the electrode group includes a positive electrode plate, a negative electrode plate, and a separator between the positive electrode plate and the negative electrode plate, the positive plate with the negative plate all has utmost point ear, and is different in the cavity the series connection between the utmost point crowd, in two cavities of direct series connection the utmost point crowd is located the polarity of the utmost point ear of the same end of casing is opposite, series connection the series busbar of utmost point crowd is arranged in the battery jar and is sealed the outside.

Optionally, the tabs include a positive tab connected to the positive plate and a negative tab connected to the negative plate, the positive tab and the negative tab are respectively located at two opposite ends of the electrode group, after the electrode group is installed in the battery jar, the positive tab of the same electrode group is located at the first end, and the negative tab is located at the second end; or the positive pole lug of the same pole group is positioned at the second end, and the negative pole lug is positioned at the first end.

Optionally, the pole groups in different cavities are installed into the battery jar from one end of the battery jar according to the arrangement sequence of the cavities, and the two pole groups directly connected in series have opposite polarities of the pole lugs in the two directions of the first end and the second end.

Optionally, a plate positioning bar is provided on an inner wall at one end of the battery case in a direction perpendicular to the plate surface of the positive or negative plate.

Optionally, the serial bus bar comprises a conductive bar and a nose groove formed on the conductive bar, the tab is inserted into the nose groove, and the extension tube and the conductive bar form a pressing contact through the nose groove; or the pole ear is welded with the nose groove.

Optionally, at least one of the positive electrode plate and the negative electrode plate has one or more tabs, the number of the serial busbars connecting two electrode groups in series is one or more, and the plurality of serial busbars connecting two electrode groups are arranged in parallel; and a positioning clamping groove is arranged on the serial bus bar and clamped into the battery jar for sealing.

Optionally, the electric conduction rate of the serial bus bar, the positive pole column bus bar and the negative pole column bus bar is not less than 1 x 10⁷S/m。

Optionally, the casing still includes the battery closing cap, the battery closing cap is set up first end with the second end, be equipped with on the battery closing cap and seal the rubber slot and lead electrical drainage rubber slot, it is filled with sealed glue to seal the rubber slot and lead electrical drainage rubber slot intussuseption, it passes through to seal the rubber slot sealed glue with the battery slot seals the bonding, the series connection busbar anodal post busbar, negative pole post busbar all are fixed in lead electrical drainage rubber slot sealed in.

Optionally, a plurality of liquid injection holes are formed in the battery cover, the liquid injection holes are located at the first end or the second end, at least one liquid injection hole is formed in each chamber and communicated with the chamber, and a one-way safety valve is arranged in each liquid injection hole.

Optionally, a pole column hole is formed in the battery sealing cover, a pole column of the battery device is located in the pole column hole, the battery sealing cover surrounds the pole column hole, a pole column glue groove is formed in the pole column hole, and sealing glue is filled in the pole column glue groove.

According to one embodiment of the disclosure, the positive plate and the negative plate of the same electrode group lead out the electrode lugs in opposite directions, when electrochemical reaction is carried out, the physical resistance of current carrying of the electrode active materials on the positive plate and the negative plate which are positioned at opposite positions is approximately equivalent, the charge and discharge chemical reactions of the positive active material and the negative active material on the upper part, the middle part and the lower part of the electrode group are relatively more uniform, and the electrolyte at different parts in the cavity can be fully utilized, so that the phenomenon of uneven reaction of the electrode plate active materials of the battery device is greatly reduced, the internal resistance of the electrode group is reduced, and the cycle life of the battery device is prolonged.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is an exploded view of a battery device according to one embodiment of the present disclosure.

Fig. 2 is a schematic structural view of a battery device without a cover and a cap plate according to an embodiment of the present disclosure.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is a schematic structural diagram of a battery well according to one embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of a series buss bar according to one embodiment of the present disclosure.

Fig. 6 is a perspective view of a negative post bus bar according to one embodiment of the present disclosure.

FIG. 7 is a schematic diagram of another series buss, according to one embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram of yet another series buss, according to one embodiment of the present disclosure.

Fig. 9 is a perspective view of a closure according to one embodiment of the present disclosure.

Fig. 10 is a bottom view of a closure according to one embodiment of the present disclosure.

Fig. 11 is a sectional view taken along line a-a of fig. 10.

Fig. 12 is a sectional view taken along line B-B of fig. 10.

Fig. 13 is another angled perspective view of a closure according to one embodiment of the present disclosure.

Fig. 14 is a schematic elevation view of a pole group according to one embodiment of the present disclosure.

FIG. 15 is a side view schematic of a pole group according to one embodiment of the present disclosure.

Fig. 16-17 are schematic diagrams of physical resistance distributions of electrode plates according to one embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to one embodiment of the present disclosure, a battery device is provided. For example, the battery device is a battery device having a laminated electrode structure, and a lead-acid battery is exemplified below.

As shown in fig. 1 and 2, the battery device includes a case and a pole group. The housing includes a battery well 05 cover 62 and an end cover 61. The battery container 05 has a plurality of cavities arranged in parallel, and two adjacent cavities are separated by a battery container partition 502. The housing includes first and second oppositely disposed ends. The chamber extends through the first end and the second end. A battery well seal 503 is provided at both the first end and the second end. The pole group is positioned in a space enclosed by the battery groove partition 502, the battery groove wall 501, the end sealing cover 61 and the sealing cover 62.

As shown in fig. 3 and 14 to 15, the electrode group includes a positive electrode plate 01, a negative electrode plate 02, and a separator 03 between the positive electrode plate 01 and the negative electrode plate 02. The positive plate 01 and the negative plate 02 each have a tab. The positive plate 01 and the negative plate 02 are respectively connected with a positive electrode lug 101 and a negative electrode lug 201. The pole groups in the two adjacent cavities are positioned on the pole lugs at the same end of the shell, and the polarities of the pole lugs are opposite. The pole groups in different cavities are connected in series. The serial bus bar 41 connecting the pole groups in series is arranged outside the battery jar seal 503, and the serial bus bar 41 and the battery jar partition 502 are distributed in a T-shaped structure.

For example, the positive electrode tab 101 and the negative electrode tab 201 are respectively located at two opposite ends of a pole group, after the pole group is installed in the battery jar 05, the positive electrode tab 101 of the same pole group is located at the first end, and the negative electrode tab 201 is located at the second end; or the positive electrode tab 101 of the same electrode group is positioned at the second end, and the negative electrode tab 201 is positioned at the first end.

When in use, the battery device can be horizontally placed, namely, the positive electrode tab 101 and the negative electrode tab 201 of the same electrode group are positioned at the same horizontal position; alternatively, the pole group is vertically disposed, that is, one of the positive pole tab 101 and the negative pole tab 201 is above and the other is below, and the pole group is fixed in the cavity by tightly assembling the periphery of the battery jar and supporting the pole plate positioning bar 504 arranged in the battery jar.

In the embodiment of the present disclosure, the positive plate 01 and the negative plate 02 of the same electrode group have tabs led out in opposite directions, when performing electrochemical reaction, a plurality of regions are divided according to the size of the plate surface of the plate, and the potential difference between the positive active material and the negative active material 203 corresponding to each region on the positive and negative electrodes on the two sides of the separator 03 is more consistent, so that the active materials in each region on the electrode can fully perform electrochemical reaction, and the electrolytes in different positions in the cavity can be fully utilized, thereby greatly reducing the phenomenon of uneven reaction of the plate active material of the battery device, reducing the internal resistance of the electrode group, and improving the cycle life of the battery device.

In addition, the physical resistance of the electrode active materials on the positive and negative electrode plates at opposite positions for current carrying is approximately equivalent, the charge and discharge chemical reactions of the upper, middle and lower parts of the electrode group are relatively more uniformly generated, the electrolyte at different parts in the chamber can be fully utilized, and the reduction of the battery capacity and the reduction of the service life caused by the non-uniform application of the positive and negative electrode active materials are avoided.

Fig. 4 is a schematic structural diagram of a battery well 05 according to one embodiment of the present disclosure.

As shown in fig. 4, battery well 05 includes a battery well wall 501 and a battery well partition 502. The number of the battery cell walls 501 is four, and two battery cell walls are arranged oppositely. The cell walls 501 enclose a square structure. The battery compartment partition 502 is provided in plurality and is juxtaposed between the opposing battery compartment walls 501. The battery compartment wall 501 and the battery compartment partition 502 are respectively provided with a battery compartment seal 503 at both ends. The battery well seal 503 forms a sealed connection with the end cap 61 and the cover 62, respectively, in the housing assembly. The battery case 05 has a rectangular parallelepiped structure as a whole. Adjacent battery well partitions 502 are spaced apart. A chamber for receiving the pole group is formed between adjacent battery well partitions 502. The number of chambers and the size of each chamber can be set according to actual needs. The cross-sectional shape of the battery well 05 perpendicular to the battery well wall 501 may also be rounded rectangle, circle, arc, ellipse, trapezoid, diamond, etc.

The cell well partition 502 and the cell well wall 501 are insulating materials, such as plastic, ceramic, glass, rubber, etc. Forming the battery case 05 by integral molding; the battery case partition 502 and the battery case wall 501 may be bonded to each other by bonding to form the battery case 05. The upper end of the battery well 05 is a first end and the lower end is a second end. As shown in fig. 2, the pole groups are inserted into the corresponding chambers from either the first end or the second end. As shown in fig. 4, a plate positioning bar 504 is provided on an inner wall of one end of the battery case 05 in a direction perpendicular to the plate surface direction of the positive electrode plate 01 or the negative electrode plate 02. The plate positioning bars 504 can fix the position of the pole group, thereby making the assembly of the pole group more accurate.

For example, the electrode groups in different chambers are loaded into the battery well 05 from one end (e.g., the second end) of the battery well 05 in the order of arrangement of the chambers, and the electrode groups connected in series have opposite polarities of the tabs in both directions of the first end and the second end.

Fig. 14 is a schematic elevation view of a pole group according to one embodiment of the present disclosure. FIG. 15 is a side view schematic of a pole group according to one embodiment of the present disclosure.

As shown in fig. 14 to 15, the electrode group includes at least one set of a positive electrode plate 01, a negative electrode plate 02, and a separator 03. The positive plate 01, the negative plate 02 and the partition plate 03 are all of plate-shaped structures, electrode active materials are attached to the periphery of a grid in a surrounding range, the grid in the plate is a carrier of active materials, the negative active materials 203 of the negative plate 02 are attached to the periphery of a negative electrode frame 202 of the negative electrode grid in the surrounding range, the positive active materials of the positive plate 01 are attached to the periphery of a positive electrode frame of a positive electrode grid in the surrounding range, the grid frame is generally surrounded into a rectangular shape, a rhombic shape, an oval shape, a circular shape and the like, and the positive electrode frame and the negative electrode frame in the same electrode group are similar in surrounding shape. The negative electrode plate 02 and the positive electrode plate 01 are respectively attached to both sides of the separator 03. One end of the positive and negative electrode grids is provided with a tab extending outwards, such as a positive tab 101 of the positive plate 01 and a negative tab 201 of the negative plate 02. The positive and negative plate grids are made of lead and lead alloy, and are formed by casting lead liquid in a mould, or formed by punching a lead plate, or formed by winding a lead bar. The planes of the positive and negative grids are round, rectangular and the like. The positive and negative grids are used as current collectors of the electrodes, and the tabs are columnar. For example, the positive plate 01 and the negative plate 02 are rectangular structures, the tabs are protruded outwards from one frame side of the rectangular structure, when the positive tabs 101 are all protruded downwards from the electrode group, the negative tabs 201 are all protruded upwards from the electrode group, and the positive tabs 101 and the negative tabs 201 are reversely distributed on two sides of the electrode group. The pole ear of each pole plate is one or more, and a plurality of pole ears are arranged in parallel so as to make the current of the electrode uniform.

The grid is used as a positive current collector and a negative current collector, current needs to be transmitted to the grid through a positive electrode tab 101 and a negative electrode tab 201 during charging and discharging, and the positive electrode tab 101 and the negative electrode tab 201 are used as equipotential points for input and output of electric quantity of the polar plate. The magnitude of the grid resistance value determines the ease with which the corresponding resistance location accepts and releases charge to the tabs. The larger the resistance, the more difficult it is to accept or discharge the charge, and the smaller the current density corresponding to the electrode reaction, and the performance is comparable to the surface resistivity of the electrode. When the positive tab 101 and the negative tab 201 are on the same side of the pole group, the electrode surface resistivity in the area on one side of the tab may be significantly lower than the counter electrode surface resistivity on the opposite side of the tab. The current density at one side of the tab is shown to be significantly greater than the current density at the opposite side in the electrode reaction. When the positive electrode tab 101 and the negative electrode tab 201 are distributed on two sides of the electrode group, as shown in fig. 16, the electrode surface resistivity difference of different regions of the plate surface of the electrode plate is significantly reduced due to different layout modes of the tabs. For example, from 6.1m Ω to 2.2m Ω. As shown in fig. 17, the positive and negative electrode tabs are distributed in a plurality of uniform manner, and the surface resistivity difference of the counter electrode can be further reduced to 1.3m Ω. Therefore, the mode of relative distribution of the positive electrode lug and the negative electrode lug can effectively reduce the physical resistance range of different areas of the electrode group.

In one example, the separator 03 comprises a plurality of layers. The plurality of layers form a folded structure. The positive electrode plates 01 and the negative electrode plates 02 are alternately disposed on the respective layers. For example, the separator 03 is a sheet-like glass fiber wool. The glass fiber cotton is bent into a rectangular folding structure, a rhombic folding structure, a circular folding structure and the like. The positive electrode plates 01 and the negative electrode plates 02 are alternately arranged, and the separator 03 is arranged to extend between the positive electrode plates 01 and the negative electrode plates 02. In this way, the plurality of positive electrode plates 01 and negative electrode plates 02 form a group of electrodes having an integral structure via the separators 03. This facilitates assembly and assembly of the pole groups.

Fig. 2 is a schematic structural diagram of a portion of a battery device according to one embodiment of the present disclosure. Fig. 3 is a sectional view taken along line a-a of fig. 2.

In one example, the pole groups in different chambers are connected in series in the order of arrangement of the chambers. For example, as shown in fig. 3, serially connected in sequence from left to right or serially connected in sequence from right to left.

As shown in fig. 2 to 3, the first end of the pole group in the rightmost chamber is a positive electrode tab 101, and the second end is a negative electrode tab 201. The first end of the pole group adjacent to the rightmost chamber is a negative pole tab 201, and the second end is a positive pole tab 101. The number of the cavities is 6, the number of the cavities is from right to left, the arrangement modes of the pole lugs of the pole groups in the odd-numbered cavities are the same, and the arrangement modes of the pole lugs of the pole groups in the even-numbered cavities are the same. When the electrodes are connected in series, the first end is selected as a leading-out terminal from the outermost electrode group, the second end of the electrode group is selected to be connected in series with the second end of the electrode group in the adjacent second cavity, next, the first end of the electrode group in the second cavity is selected to be connected in series with the first end of the electrode group in the adjacent third cavity, and so on until one end of the last electrode group in the last cavity is connected in series to form the electrode group, and the end of the last electrode group which is not connected in series is left as the leading-out terminal. For example, the negative electrode tab 201 of the electrode group in the rightmost chamber is located at the second end, and the positive electrode tab 101 of the electrode group in the chamber adjacent to the chamber is located at the second end, and these two groups of tabs are connected in series. In this way, different pole groups can be connected in series in sequence, which minimizes the size of the conductors used for the series connection, simplifies the path of the conductors, simplifies the structure of the battery device, and reduces the installation difficulty.

Of course, the series connection is not limited to this, and may be performed sequentially from left to right or in any order as long as the series connection of all the electrode groups can be achieved and the interference between the respective serial buses or between the serial buses and the positive and negative pole post buses does not occur.

The bus bar is formed by connecting all the lug ends of the same polarity of the same pole group in parallel through the bus bar, so that the output end and the input end of the same pole group have the same potential, and are connected with other pole groups in series or in parallel through the bus bar and are also connected to the output terminal of the battery through the bus bar. The busbars include a series busbar 41, a positive post busbar 42, and a negative post busbar 43.

In one example, the pole groups in different chambers are connected in series by a series bus 41. The series bus bar 41 is used to connect the pole groups in different chambers in series. The positive pole busbar 42 is used for connecting the most terminal positive pole tabs of all the battery pole groups connected in series in parallel and then conducting with the battery terminal pole 406. The negative pole busbar 43 is used for connecting the most terminal negative pole tabs of all the battery pole groups connected in series in parallel and then conducting with the battery terminal pole 406. The bus bar is made of conductive material and has conductivity not less than 1 × 10⁷The material of S/m is beneficial to improving the specific power of the battery, such as metal, conductive inorganic material, conductive organic material and the like. Alternatively, the metal includes aluminum, aluminum alloy, copper alloy, aluminum alloy, silver alloy, and the like. The conductive electrodeless material is a conductive carbon material and the like. The bus bar has a bar shape as a whole, for example, a rectangular parallelepiped bar shape. The busbar has a plurality of tie points, and the tie point is connected with utmost point ear. The busbar has the characteristics of high strength and good connection stability.

As shown in fig. 5, the serial bus bar 41 includes a conductive bar 403, and a positive electrode tab slot 401 and a negative electrode tab slot 402 formed on the conductive bar 403, and the positive and negative electrode tabs are respectively inserted into the positive electrode tab slot 401 or the negative electrode tab slot 402, and are brought into press contact with the conductive bar 403 through the tab slots.

Specifically, the conductive bar 403 is an aluminum alloy or copper alloy sheet. The nose slots are punched and drilled in the conductive bar 403. The positive electrode nose groove and the negative electrode nose groove are connection points, and the tabs are inserted into the nose grooves. For example, the nose slots include a positive electrode nose slot 401 for plugging with the positive electrode tab 101 and a negative electrode nose slot 402 for plugging with the negative electrode tab 201, the inner diameter of the positive electrode nose slot 401 matches with the outer diameter of the positive electrode tab 101, the inner diameter of the negative electrode nose slot 402 matches with the outer diameter of the negative electrode tab 201, in order to facilitate the positioning of the busbar, a positioning slot 404 is arranged on the conductive bar 403, the positioning slot 404 is located between the positive electrode nose slot 401 and the negative electrode nose slot 402, and the size of the bending opening of the positioning slot 404 matches with the thickness of the battery slot seal 503.

For example, the nose slot has an extension tube 401 a. For example, the extension pipe 401a is connected to the conductive bar 403 by welding, bonding, molding, or the like. The extension pipe 401a increases a contact area between the tab and the conductive bar 403, which makes an electrical connection between the bus bar and the tab more stable.

In addition, the extension pipe 401a increases the insertion force of the tab, so that the connection between the two is firmer.

In one example, as shown in fig. 7, a busbar, such as the serial busbar 41, is made of a metal plate having a plurality of nose slots formed therein. The plurality of nasal cavities are arranged in a matrix. One part is a positive electrode nose slot 401, and the other part is a negative electrode nose slot 402. A positioning groove 404 is formed between the positive electrode nose groove 401 and the negative electrode nose groove 402.

In one example, as shown in fig. 8, a busbar, such as the serial busbar 41, is made of a metal plate having a plurality of nose slots formed therein. The plurality of nasal cavities are arranged in a matrix. One part is a positive electrode nose groove, and the other part is a negative electrode nose groove. The nose slot has an extension tube 401 a. Such a series bus

In one example, at least one of the positive electrode plate 01 and the negative electrode plate 02 has one or more tabs. The number of the serial busbars for connecting two adjacent pole groups in series is one or more, and the plurality of serial busbars for connecting the two adjacent pole groups are arranged in parallel; the serial bus bars are respectively provided with a positioning clamping groove 404, and the positioning clamping grooves 404 are clamped on the battery jar seal 503.

The plurality of tabs and the plurality of serial buses enable the current of the electrodes to be more uniform, and the polarization phenomenon of the electrode group is reduced.

As shown in fig. 14, the plate has a rectangular shape as a whole. A plurality of tabs are led out from the short side of the rectangle. For example, a plurality of tabs are provided on the short side at equal intervals. For example, the tab is formed by extending a lead bar around the grid. The cross section shape of the nose groove is matched with that of the pole lug. The lug is inserted into the nose groove, and the nose groove is extruded and deformed to form fastening between the nose groove and the corresponding lug so as to prevent the lug from being separated from the nose groove.

In one example, as shown in fig. 14, a plurality of adjacent tabs of the same positive electrode plate 01 or negative electrode plate 02 are collectively provided. The centralized arrangement means that a plurality of tabs are gathered together from an independent and dispersed state, for example, two adjacent tabs are attached together to change two columns into one column. The inner section of the nose groove is matched with the overall outer contour formed by the lugs. For example, the cross-section of the nose groove is two circles connected together. When the plug-in connection is carried out, a plurality of tabs gathered together are inserted into one nose groove. This arrangement provides a higher overall structural strength of the tab which is concentrated in one tab, and allows a greater external force to be applied during insertion, thereby facilitating insertion of the tab into the nose groove.

In addition, the mode of concentrated setting can reduce the quantity of nose groove to and the quantity of pegging graft. This makes plugging of the bus bar easy.

Of course, in other examples, each tab may be independently disposed and independently inserted into the nose slot.

As shown in fig. 15, the positive electrode plate 01, the negative electrode plate 02, and the separator 03 are all plural. The positive electrode tabs 101 of the positive electrode plates 01 are positioned in the same row, the negative electrode tabs 201 of the negative electrode plates 02 are positioned in the same row, and a plurality of nose grooves are formed in the metal plate. The plurality of nasal cavities are arranged in a matrix. One part is a positive electrode nose slot 401, and the other part is a negative electrode nose slot 402. When the insertion is performed, the plurality of positive electrode tabs 101 are inserted into the plurality of positive electrode nose grooves 401 and the plurality of negative electrode tabs 201 are inserted into the plurality of negative electrode nose grooves 402 on the serial bus bar 41, respectively, and the plurality of positive electrode plates 01 or the plurality of negative electrode plates 02 in one electrode group are connected in parallel by the serial bus bar 41.

For example, glass fiber wool is repeatedly folded to form a plurality of U-shaped openings. The adjacent folded openings are in opposite directions. An electrode is placed within each folded port. The positive electrode plate 01 and the negative electrode plate 02 are placed in the folded opening of the separator 03.

The folded structure is formed firstly, and then the positive plate 01 and the negative plate 02 are placed in the open slot; alternatively, in the process of placing the positive electrode plates 01 and the negative electrode plates 02, the glass fiber cotton may be gradually folded along with the placement of the positive electrode plates 01 and the negative electrode plates 02 to form a folded structure.

Through setting up beta structure, the wholeness of utmost point crowd is better, need not cut into independent fritter to the raw and other materials of baffle 03, has simplified the assembly step of utmost point crowd, also is favorable to automatic package piece continuity of operation.

The number of layers of the folded structure, as well as the size of each layer, can be set by the skilled person according to the actual needs.

In one example, as shown in fig. 15, the positive electrode tab 101 of the positive electrode plate 01 and the negative electrode tab 201 of the negative electrode plate 02 are respectively drawn out from both ends of the folded structure parallel to the direction of the fold. The tabs are perpendicular to the folded S-shaped section of the separator 03 and protrude out of two sides of the separator 03. In this way, the extraction of the tab is not interfered by the separator 03, and as shown in fig. 1, the amount of the sealant 09 in the electrode group is not affected by the adsorption of the separator 03. For example, the tabs are located on the short sides of a rectangular electrode.

As shown in fig. 6, the negative post bus 43 includes a plurality of conductive bars 403 and is arranged in parallel. Negative post bus 43 also includes a parallel element of conductive bar 403. A plurality of said conductive bars 403 are connected in parallel by means of parallel elements. An end pole 406 of the battery device is arranged on the parallel element. For example, the parallel elements are parallel beams 405. The parallel beams 405 are strip-shaped. For example, the cross-section of the parallel beams 405 is rectangular. When connecting, the parallel beam 405 and the plurality of conductive bars 403 are fixed perpendicularly and crosswise, for example, the parallel beam 405 and each conductive bar 403 are fixed by laser welding or bolt connection, and the conductive bars 403 are arranged side by side along the axial direction of the parallel beam 405.

In one example, as shown in fig. 6, an end post 406 is provided on the parallel beam 405. The terminal post 406 serves as either a negative terminal post or a positive terminal post of the battery device. For example, the pole is a cylinder or a square column. For example, a threaded hole 407 is formed in an end surface of the pole remote from the bus bar. The threaded hole 407 has internal threads therein. The terminal of the external circuit is attached to the terminal post 406 by a bolt. The bolt is threadedly coupled to the threaded hole 407. The terminal posts 406 may be integrally formed with the parallel beam 405, or the terminal posts 406 may be welded to the parallel beam 405.

The parallel beam 405 may also be designed with a serial bus 41 connecting the two electrode groups in parallel to eliminate the potential difference between the tabs at the connecting portion of the two series electrode groups.

In one example, as shown in FIG. 1, the cap 62 and the end cap 61 are disposed at a first end and a second end, respectively. The end caps 61 and the cover 62 seal the end busbars, including the series busbar 41, the positive post busbar 42, and the negative post busbar 43. The cover 62 and the end cover 61 are coated outside the bus bars to prevent the electrolyte from contacting the bus bars. For example, the cover 62 and the end cover 61 are made of plastic or rubber. After the connection of the bus bar and the tabs is completed, the cover 62 and the end cover 61 are formed by injection molding outside the bus bar in an insert injection molding mode. The cover 62 and the end cover 61 form a sealing connection with the battery well 05 to seal the respective chambers.

In other examples, the cover 62 and the end cover 61 are separately injection molded, and grooves 605605 corresponding to the connection points of all the bus bars, the parallel beams 405, and the battery jar 05 are formed on the cover 62 and the end cover 61. The cover 62 and end cover 61 are plugged outside the bus bars, parallel beams 405 and battery wells 05.

Fig. 9 is a perspective view of an end closure 61 according to one embodiment of the present disclosure. Fig. 10 is a bottom view of end closure 61 according to one embodiment of the present disclosure. Fig. 11 is a sectional view taken along line a-a of fig. 10. Fig. 12 is a sectional view taken along line B-B of fig. 10.

As shown in fig. 9, the end cap 61 has a rectangular shape as a whole. The end cap 61 includes four side walls 603 and a bottom portion connected to the four side walls 603. A glue groove for accommodating the element is formed on the bottom. The glue groove comprises a sealing glue groove 601, a conductive glue discharging groove 602, a parallel beam glue groove 606, a pole glue groove 607 and the like. The terminal post glue groove 607 is a closed bottom groove, and the bottom sealing of the terminal post glue groove 607 needs to be removed after the terminal post 406 is cured in the sealant 09, so that the top end of the terminal post 406 can be exposed from the front surface of the terminal sealing cover 61. When the battery is installed, the sealing rubber groove 601 is in sealing connection with the battery groove seal 503, the side wall 603 is in sealing connection with the battery groove wall 501, and the battery groove partition 502 is in sealing connection with the bottom surrounded by the four side walls 603 of the end cover 61. The conductive busbar glue slot 602 is used to accommodate the conductive busbar 403 and the nose slot attached to the conductive busbar 403. The parallel beam glue slot 606 is used to accommodate the parallel beam 405.

The structure of the sealing cover 62 is similar to that of the end sealing cover 61, the sealing cover 62 is not provided with the pole glue groove 607, the battery end pole 406 does not need to penetrate through the structure of the sealing cover 62 to expose a conductive section, and the bottom sealing operation process of removing the pole glue groove 607 does not exist. The number of the pole groups in one battery is even, the battery terminal poles 406 are distributed on one side of the battery, one battery comprises one terminal sealing cover 61 and one sealing cover 62, when the battery is placed on the side for use, the positive terminal poles and the negative terminal poles of the battery are located on one side face of the battery, the battery is used vertically, and the positive terminal poles and the negative terminal poles of the battery are conventionally located on the battery. The number of the pole groups in a battery is odd, the battery terminal poles 406 are distributed on two sides of the battery, the battery needs to comprise two terminal sealing covers 61, when the battery is placed on the side for use, the positive terminal poles and the negative terminal poles of the battery are respectively arranged on two side surfaces of the battery, and under the vertical use condition of the battery, one terminal pole 406 is positioned at the bottom of the battery.

In one example, the end sealing cover 61 is provided with a plurality of liquid injection holes 604, the number of the liquid injection holes 604 is the same as that of the corresponding battery chambers, and the liquid injection holes are respectively in one-to-one correspondence with the chambers; the lid 62 is provided with a plurality of pour holes 604, and the number of pour holes 604 corresponds to the number of corresponding battery compartments. One pole group corresponds to two injection holes 604.

In one example, the end sealing cover 61 is provided with a plurality of liquid injection holes 604, the number of the liquid injection holes 604 is the same as that of the corresponding battery chambers, and the liquid injection holes are respectively in one-to-one correspondence with the chambers; the lid 62 is not provided with a pour hole. One for each fill hole 604.

As shown in fig. 9, the end cap 61 is provided with a plurality of pour holes 604. During injection, an electrolyte, such as a dilute sulfuric acid electrolyte, is injected into each chamber through the injection hole 604. The pour hole 604 is sealed by a one-way relief valve 07 as shown in FIG. 1.

In one example, as shown in fig. 11, a plurality of grooves 605 are provided on the end cap 61, the grooves 605 opening out to the outside of the battery. A plurality of the grooves 605 are arranged in a matrix. The recess 605 can serve as a weight reduction, forming a thinned area 605 at the bottom where the recess 605 is located. The recess 605 also effectively eliminates stress concentrations of the end cap 61 during the injection molding process, maintaining the structural stability of the end cap 61. The recess 605 also saves material on the end closure 61.

In one example, as shown in FIG. 13, the pour hole 604 is located in a recess 605 of the lid 62. For example, a pour hole 604 is formed in the bottom of the recess 605.

In one example, as shown in fig. 9 and 11, a rib is formed between adjacent grooves 605, and the bus bar is located in the rib. For example, the recess 605 has a square configuration. A conductive gel discharge groove 602 is formed on the opposite side of the rib from the opening direction of the groove 605. During assembly, the conductive bar 403 is inserted into the conductive bar glue slot 602. The nose slots are also located within the conductive gel drainage slots 602. The ribs can act as reinforcing ribs, thereby increasing the structural strength of the end closure 61. The ribs can also serve to accommodate the busbar, thus making full use of the space of the ribs.

In one example, as shown in fig. 1, the battery device further includes an end cap plate 81. The end cover plate 81 is disposed outside the end closure 61. For example, the end cover plate 81 is a flat plate with a pole hole and a polarity indication. The end cover plate 81 is covered outside the end cover 61 by clamping, bolt connection, riveting, bonding and other modes. The end cover plate 81 can shield the groove 605, prevent water accumulation and dust accumulation in the groove 605, keep the battery device clean, and the end cover plate 81 can expose the end pole 406 and mark polarity.

In one example, as shown in fig. 1, the battery device further includes a cover plate 82. The cover 82 is disposed outside the cover 62. For example, the cover 82 is a flat plate. The cover plate 82 is covered outside the cover 62 by clamping, bolting, riveting, bonding and the like. The cover plate 82 can shield the groove 605, prevent water accumulation and dust accumulation in the groove 605, and keep the battery device clean.

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A battery device is characterized by comprising a shell and a pole group, wherein the shell comprises a battery groove, the battery jar is provided with a plurality of cavities which are arranged in parallel, two adjacent cavities are separated by the battery jar, the housing includes a first end and a second end disposed opposite each other, the chamber extending through the first end and the second end, battery jar seals are arranged at the first end and the second end, the pole group is positioned in the cavity, the electrode group includes a positive electrode plate, a negative electrode plate, and a separator between the positive electrode plate and the negative electrode plate, the positive plate with the negative plate all has utmost point ear, and is different in the cavity the series connection between the utmost point crowd, in two cavities of direct series connection the utmost point crowd is located the polarity of the utmost point ear of the same end of casing is opposite, series connection the series busbar of utmost point crowd is arranged in the battery jar and is sealed the outside.

2. The battery device of claim 1, wherein the tabs comprise a positive tab connected to the positive plate and a negative tab connected to the negative plate, the positive and negative tabs being located at opposite ends of the electrode group, respectively, the positive tab of the same electrode group being located at the first end and the negative tab being located at the second end after the electrode group is installed in the battery can; or the positive pole lug of the same pole group is positioned at the second end, and the negative pole lug is positioned at the first end.

3. The battery device of claim 2, wherein the pole groups in different chambers are loaded into the battery well from one end of the battery well in the order in which the chambers are arranged, and wherein the two pole groups connected directly in series have opposite polarity of the tabs in both directions at the first end and the second end.

4. The battery device according to claim 1, wherein an electrode plate positioning bar is provided in a direction perpendicular to a plate surface of the positive electrode plate or the negative electrode plate on an inner wall at one end of the battery can.

5. The battery device according to claim 1, wherein the series bus bar includes a conductive bar and a nose groove formed on the conductive bar, the tab is inserted into the nose groove, and the pressure contact is formed between the extension tube and the conductive bar through the nose groove; or the pole ear is welded with the nose groove.

6. The battery device according to claim 1, wherein at least one of the positive electrode plate and the negative electrode plate has one or more tabs, the number of the series bus bars connecting the two electrode groups in series is one or more, and the plurality of series bus bars connecting the two electrode groups are arranged in parallel; and a positioning clamping groove is arranged on the serial bus bar and clamped into the battery jar for sealing.

7. The battery device according to claim 1, further comprising a positive post bus bar and a negative post bus bar, wherein the serial bus bar, the positive post bus bar, and the negative post bus bar have an electrical conductivity of not less than 1 x 10⁷S/m。

8. The battery device according to claim 7, wherein the case further comprises a battery cover, the battery cover is disposed at the first end and the second end, the battery cover is provided with a sealing glue groove and a conductive glue draining groove, the sealing glue groove and the conductive glue draining groove are filled with a sealant, the sealing glue groove is sealed and bonded with the battery groove through the sealant, and the serial bus bar, the positive post bus bar and the negative post bus bar are all fixed in the sealant.

9. The battery device of claim 8, wherein the battery cover has a plurality of dispensing openings located at either the first end or the second end, at least one dispensing opening in each of the chambers is in communication with the dispensing openings, and a one-way safety valve is disposed in the dispensing openings.

10. The battery device as claimed in claim 8, wherein a post hole is provided on the battery cover, a post of the battery device is located in the post hole, a post glue groove is provided around the post hole on the battery cover, and the post glue groove is filled with a sealant.