Multi-cavity battery pack structure

Abstract

The utility model provides a multi-cavity battery pack structure. The multi-cavity battery pack structure comprises a shell, a cover plate and a plurality of battery cell monomers, the battery cell monomers are arranged in the shell, and the cover plate covers the end surface of one end of the shell; the shell comprises a shell body and a plurality of cavity units arranged in the shell body, a wall plate is arranged between every two adjacent cavity units, and the wall plates abut against the bottom face of the shell body and the side face of the shell body; a first boss is arranged at one end, close to one side of the cover plate, of each cavity unit, and a second boss is arranged at the other end of each cavity unit; the battery cell monomers are arranged in the cavity unit, and the battery cell monomers are arranged between the first boss and the second boss; the battery cell monomers and the cavity units are arranged in a one-to-one correspondence manner; the second bosses are arranged in a pairwise communicating mode. The first bosses located in the middle are arranged in a pairwise communicating mode, and the first bosses located at the two ends are independently arranged. The method is low in cost and environmentally friendly.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a multi-cavity battery pack structure. Background Art

[0002] For lead-acid batteries, lead is extremely harmful to the human body, and even a small amount of lead can pose a serious threat to human health. Moreover, waste lead-acid batteries have excessive lead content, and improper disposal will cause serious environmental pollution and endanger people's health. Due to environmental protection needs, the production and use of lead-acid batteries have been restricted.

[0003] At present, for the use of lithium-ion / sodium-ion battery packs, whether it is soft-pack batteries, cylindrical batteries, or square-shell batteries, lithium-ion / sodium-ion batteries are basically produced as single units; if they need to be used in specific occasions, such as electric vehicles, motorcycles, or energy storage modules, etc., it is necessary to establish a PACK production line, and then assemble and use the PACK according to demand, which requires a large investment in site, materials, and manpower; if a battery is broken, it requires very professional staff to repair and replace the battery, and the cost and threshold of use are high.

[0004] Normally, most power battery shells are formed by stretching aluminum alloy. In order to increase energy density, the aluminum shell of the battery is very thin. If the positive and negative electrodes of a battery accidentally touch the battery shell of another battery to cause a short circuit, the shell of the other battery will be discharged violently due to the short-circuited battery very quickly (usually within a few tenths of a second). The strong current will immediately burn through the shell of the battery that caused the short circuit, which is easy to ignite the free electrolyte inside the battery and cause a fire. Utility Model Content

[0005] The utility model provides a multi-cavity battery pack structure, which aims to solve the problems of thin shell structure of traditional lithium battery single cells and high safety risk of batteries.

[0006] To achieve the above-mentioned purpose, the embodiment of the utility model provides a multi-chamber battery pack structure, comprising a shell, a cover plate and a plurality of battery cells; the battery cells are arranged in the shell, and the cover plate is covered on the end surface of one end of the shell;

[0007] The shell comprises a shell body and a plurality of cavity units arranged in the shell body, a wall plate is arranged between adjacent cavity units, and the wall plate is respectively abutted against the bottom surface of the shell body and the side surface of the shell body; a first boss is arranged at one end of each cavity unit close to the cover plate, and a second boss is arranged at the other end; the battery cell monomer is arranged in the cavity unit, and the battery cell monomer is arranged between the first boss and the second boss; the battery cell monomer and the cavity unit are arranged one by one;

[0008] The second bosses are arranged in pairs; the first bosses in the middle are arranged in pairs, and the first bosses at both ends are arranged independently.

[0009] As a preferred embodiment, the first boss, the cavity unit, the second boss and the shell body are integrally formed.

[0010] As a preferred embodiment, the shell further includes a first side cover and a second side cover, wherein the first side cover is arranged on the end surface of the shell body close to one end of the first boss; the second side cover is arranged on the end surface of the shell body close to one end of the second boss.

[0011] As a preferred embodiment, the first side cover and the second side cover are symmetrically arranged; a gap is arranged between the first side cover and the shell body, and a gap is arranged between the second side cover and the shell body.

[0012] As a preferred embodiment, the battery cell comprises a battery cell body, a positive electrode connecting sheet and a negative electrode connecting sheet. The positive electrode connecting sheet is arranged at one end of the battery cell body, and the negative electrode connecting sheet is arranged at the other end of the battery cell body.

[0013] As a preferred embodiment, several of the battery cells are connected in series; two adjacent battery cells are connected in series via a pole connector; among the battery cells connected in series, the battery cells at both ends are connected to the terminals via a positive pole and a negative pole, respectively.

[0014] As a preferred embodiment, the pole connector is arranged on the first boss or the second boss; the positive pole and the negative pole are respectively arranged on the first boss independently arranged.

[0015] As a preferred embodiment, in the battery cells at both ends, the positive electrode connecting piece of one battery cell is connected to the positive terminal through the positive electrode column, and the negative electrode connecting piece of the other battery cell is connected to the negative terminal through the negative electrode column.

[0016] As a preferred embodiment, the positive electrode column and the negative electrode column are respectively sealed and connected to the housing via radial compression sealing rings.

[0017] As a preferred embodiment, the pole post connector includes a positive pole post connector, a negative pole post connector and a fixing member; the positive pole post connector is integrally arranged with the negative pole post connector, the positive pole post connector is connected to the positive electrode connecting sheet, and the negative pole post connector is connected to the negative electrode connecting sheet; a fixing hole is provided on the positive pole post connector, and the fixing member fixes the pole post connector to the first boss or the second boss connected thereto through the fixing hole.

[0018] As a preferred embodiment, the cover plate is provided with an independent explosion-proof valve and a liquid injection hole; the explosion-proof valve is fixed to the cover plate by an explosion-proof valve stop ring, and a sealing rubber ring is provided between the explosion-proof valve and the cover plate; the liquid injection hole is sealed by a steel ball.

[0019] As a preferred embodiment, a balancing circuit board and a BMS control board are further provided in the housing, and the balancing circuit board and the BMS control board are respectively connected to the battery cell monomers.

[0020] As a preferred embodiment, the battery cell is a winding core; the shell is a plastic shell; the cover is a plastic cover; and the explosion-proof valve is an aluminum alloy explosion-proof valve. The aluminum alloy explosion-proof valve is used for sealing and explosion-proof, and the explosion-proof pressure value is stable and reliable; the explosion-proof valve stop ring is directly pressed to stop the valve from retreating, so that the explosion-proof valve can be quickly and reliably fixed on the cover.

[0021] As a preferred embodiment, the core is a lithium-ion battery core or a sodium-ion battery core.

[0022] In the structure of the present application, multiple cavity units are arranged in the shell through the wall plate, which effectively increases the strength of the shell in the thickness direction, so that the battery can withstand greater expansion force without being easily deformed; and it has the advantages of small size, large capacity, light weight and high energy density. At the same time, it has the function of a lithium-ion battery pack or a sodium-ion battery pack, and can be used for assembly without the need for additional PACK design and assembly, saving PACK costs and time. The present application has a simple structure, low preparation cost, small size, good sealing, high battery energy density, no pollution, and is environmentally friendly. It can be applied to large-capacity and large-size battery structures. The structure of the present application does not require PACK grouping, and can directly replace lead-acid batteries, which greatly facilitates customer installation and use. There is no need to establish a separate PACK production line, saving space, materials and manpower. Through the structure of the present application, the voltage and temperature of each battery cell can be accurately detected and collected, and the overcharge and over-discharge current can be cut off in time. The performance is no different from that of a battery pack assembled by packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of a multi-chamber battery pack structure of an embodiment of the utility model;

[0025] Figure 2 for Figure 1 Schematic diagram of the exploded structure of a multi-cavity battery pack structure;

[0026] Figure 3 for Figure 1 A schematic cross-sectional structure diagram of a multi-cavity battery pack structure;

[0027] Figure 4 for Figure 2 Schematic diagram of the explosion structure of the shell;

[0028] Figure 5 for Figure 2 A schematic diagram of the structure of a battery cell monomer;

[0029] Figure 6 for Figure 2 Schematic diagram of the structure of the pole connection. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0035] Specifically, Figures 1 to 3 As shown, the embodiment of the utility model provides a multi-chamber battery pack structure, including a shell 10, a cover plate 20 and a plurality of battery cells 30; the battery cells 30 are arranged in the shell 10, and the cover plate 20 is covered on the end surface of one end of the shell 10;

[0036] The shell 10 includes a shell body 11 and a plurality of cavity units 12 disposed in the shell body 11, and a wall plate 13 is disposed between adjacent cavity units 12, and the wall plate 13 is respectively abutted against the bottom surface of the shell body 11 and the side surface of the shell body 11; each of the cavity units 12 is provided with a first boss 121 at one end close to the cover plate 20, and a second boss 122 at the other end; the battery cell monomer 30 is disposed in the cavity unit 12, and the battery cell monomer 30 is disposed between the first boss 121 and the second boss 122; the battery cell monomer 30 is disposed in a one-to-one correspondence with the cavity unit 12;

[0037] The second bosses 122 are connected in pairs; the first bosses 121 in the middle are connected in pairs, and the first bosses 121 at both ends are independently arranged.

[0038] As a preferred embodiment, the first boss 121 , the cavity unit 12 , the second boss 122 and the shell body 11 are integrally formed.

[0039] As a preferred embodiment, Figure 4 As shown, the shell 10 also includes a first side cover 14 and a second side cover 15. The first side cover 14 is arranged on the end surface of the shell body 11 close to the first boss 121; the second side cover 15 is arranged on the end surface of the shell body 11 close to the second boss 122.

[0040] As a preferred embodiment, the first side cover 14 and the second side cover 15 are symmetrically arranged; a gap is arranged between the first side cover 14 and the shell body 11 , and a gap is arranged between the second side cover 15 and the shell body 11 .

[0041] As a preferred embodiment, Figure 5 As shown, the battery cell 30 includes a battery cell body 31 , a positive electrode connecting sheet 32 ​​and a negative electrode connecting sheet 33 . The positive electrode connecting sheet 32 ​​is arranged at one end of the battery cell body 31 , and the negative electrode connecting sheet 33 is arranged at the other end of the battery cell body 31 .

[0042] As a preferred embodiment, several of the battery cells 30 are connected in series; two adjacent battery cells 30 are connected in series through a pole connector 40; among the battery cells 30 connected in series, the battery cells 30 at both ends are respectively connected to terminals (not marked in the figure) through a positive pole 50 and a negative pole 60.

[0043] As a preferred embodiment, the pole connector 40 is disposed on the first boss 121 or the second boss 122 that are disposed in communication; the positive pole 50 and the negative pole 60 are respectively disposed on the first boss 121 that are independently disposed.

[0044] As a preferred embodiment, among the battery cells 30 at both ends, the positive electrode connecting piece 32 of one battery cell 30 is connected to the positive terminal through the positive electrode column 50 , and the negative electrode connecting piece 33 of the other battery cell 30 is connected to the negative terminal through the negative electrode column 60 .

[0045] As a preferred embodiment, the positive electrode column 50 and the negative electrode column 60 are respectively sealed and connected to the housing 10 via radial compression sealing rings 70 .

[0046] As a preferred embodiment, Figure 6 As shown, the pole connector 40 includes a positive pole connector 41, a negative pole connector 42 and a fixing member 43; the positive pole connector 41 and the negative pole connector 42 are integrally arranged, the positive pole connector 41 is connected to the positive connecting sheet 32, and the negative pole connector 42 is connected to the negative connecting sheet 33; a fixing hole (not marked in the figure) is provided on the positive pole connector 41, and the fixing member 43 fixes the pole connector 40 to the first boss 121 or the second boss 122 that are connected through the fixing hole.

[0047] As a preferred embodiment, Figure 2 As shown, the cover plate 20 is provided with an explosion-proof valve 21 and a liquid injection hole 22 which are independent of each other; the explosion-proof valve 21 is fixed to the cover plate 20 through an explosion-proof valve stop ring 211, and a sealing rubber ring 212 is provided between the explosion-proof valve 21 and the cover plate 20; the liquid injection hole 22 is sealed by a steel ball (not marked in the figure).

[0048] As a preferred embodiment, a balancing circuit board (not marked in the figure) and a BMS control board (not marked in the figure) are further provided in the housing 10 , and the balancing circuit board and the BMS control board are respectively connected to the battery cell 30 .

[0049] As a preferred embodiment, the battery cell 30 is a winding core; the housing 10 is a plastic housing; the cover plate 20 is a plastic cover plate; and the explosion-proof valve 21 is an aluminum alloy explosion-proof valve. The aluminum alloy explosion-proof valve is used for sealing and explosion-proof, and the explosion-proof pressure value is stable and reliable; the explosion-proof valve stop ring is directly pressed to stop the valve from retreating, so that the explosion-proof valve can be quickly and reliably fixed on the cover plate.

[0050] As a preferred embodiment, the core is a lithium-ion battery core or a sodium-ion battery core.

[0051] In the structure of the present application, multiple cavity units are arranged in the shell through the wall plate, which effectively increases the strength of the shell in the thickness direction, so that the battery can withstand greater expansion force without being easily deformed; and it has the advantages of small size, large capacity, light weight and high energy density. At the same time, it has the function of a lithium-ion battery pack or a sodium-ion battery pack, and can be used for assembly without the need for additional PACK design and assembly, saving PACK costs and time. The present application has a simple structure, low preparation cost, small size, good sealing, high battery energy density, no pollution, and is environmentally friendly. It can be applied to large-capacity and large-size battery structures. The structure of the present application does not require PACK grouping, and can directly replace lead-acid batteries, which greatly facilitates customer installation and use. There is no need to establish a separate PACK production line, saving space, materials and manpower. Through the structure of the present application, the voltage and temperature of each battery cell can be accurately detected and collected, and the overcharge and over-discharge current can be cut off in time. The performance is no different from that of a battery pack assembled by packing.

[0052] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0053] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-chamber battery pack structure, characterized in that: It includes a shell, a cover plate and a plurality of battery cells; the battery cells are arranged in the shell, and the cover plate is covered on the end surface of one end of the shell; The shell comprises a shell body and a plurality of cavity units arranged in the shell body, a wall plate is arranged between adjacent cavity units, and the wall plate is respectively abutted against the bottom surface of the shell body and the side surface of the shell body; a first boss is arranged at one end of each cavity unit close to the cover plate, and a second boss is arranged at the other end; the battery cell monomer is arranged in the cavity unit, and the battery cell monomer is arranged between the first boss and the second boss; the battery cell monomer and the cavity unit are arranged one by one; The second bosses are arranged in pairs; the first bosses in the middle are arranged in pairs, and the first bosses at both ends are arranged independently.

2. The multi-chamber battery pack structure according to claim 1, characterized in that: The first boss, the cavity unit, the second boss and the shell body are integrally formed.

3. The multi-chamber battery pack structure according to claim 1, characterized in that: The shell further includes a first side cover and a second side cover. The first side cover is disposed on an end surface of the shell body close to one end of the first boss; the second side cover is disposed on an end surface of the shell body close to one end of the second boss.

4. The multi-chamber battery pack structure according to claim 3, characterized in that: The first side cover and the second side cover are symmetrically arranged; a gap is arranged between the first side cover and the shell body, and between the second side cover and the shell body.

5. The multi-chamber battery pack structure according to claim 1, characterized in that: The battery cell monomer comprises a battery cell body, a positive electrode connecting piece and a negative electrode connecting piece. The positive electrode connecting piece is arranged at one end of the battery cell body, and the negative electrode connecting piece is arranged at the other end of the battery cell body.

6. The multi-chamber battery pack structure according to claim 5, characterized in that: Several of the battery cells are connected in series; two adjacent battery cells are connected in series via a pole connector; among the battery cells connected in series, the battery cells at both ends are connected to the terminals via a positive pole and a negative pole, respectively.

7. The multi-chamber battery pack structure according to claim 6, characterized in that: The pole connector is arranged on the first boss or the second boss; the positive pole and the negative pole are respectively arranged on the first boss independently arranged.

8. The multi-chamber battery pack structure according to claim 7, characterized in that: Among the battery cells at both ends, the positive electrode connection piece of one battery cell is connected to the positive terminal through the positive electrode column, and the negative electrode connection piece of the other battery cell is connected to the negative terminal through the negative electrode column; The positive pole and the negative pole are respectively sealed and connected to the shell through radial compression sealing rings.

9. The multi-chamber battery pack structure according to claim 8, characterized in that: The pole connector includes a positive pole connector, a negative pole connector and a fixing member; the positive pole connector is integrally arranged with the negative pole connector, the positive pole connector is connected to the positive connecting piece, and the negative pole connector is connected to the negative connecting piece; a fixing hole is provided on the positive pole connector, and the fixing member fixes the pole connector to the first boss or the second boss through the fixing hole.

10. The multi-chamber battery pack structure according to claim 9, characterized in that: The cover plate is provided with an explosion-proof valve and a liquid injection hole which are independent of each other; the explosion-proof valve is fixed to the cover plate through an explosion-proof valve stop ring, and a sealing rubber ring is provided between the explosion-proof valve and the cover plate; the liquid injection hole is sealed by a steel ball; A balancing circuit board and a BMS control board are also provided in the housing, and the balancing circuit board and the BMS control board are respectively connected to the battery cell monomers; The battery cell is a winding core; the shell is a plastic shell; the cover is a plastic cover; the explosion-proof valve is an aluminum alloy explosion-proof valve; The core is a lithium ion battery core or a sodium ion battery core.

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