Sodium ion battery power supply structure and automobile thereof

Abstract

The utility model relates to the technical field of power source structures, in particular to a sodium ion battery power source structure and an automobile with the sodium ion battery power source structure, the sodium ion battery power source structure comprises a box body, a sodium ion battery module, a BMS module, a current detection part and a switch part, the sodium ion battery module, the BMS module, the current detection part and the switch part are arranged in the box body, and the BMS module is provided with a BMS current limiting module. The negative electrode of the sodium ion battery module and the current detection piece are connected with the BMS current limiting module, and the positive electrode of the sodium ion battery module is connected with the switch piece; and the box body is provided with a negative terminal connected with the current detection piece and a positive terminal connected with the switch piece. The power supply structure can work safely and stably, and the safety performance of the power supply structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply structures, and more specifically, to a sodium ion battery power supply structure and a vehicle thereof. Background Art

[0002] Most of the existing start-stop power supplies are lead-acid batteries or lithium-ion batteries. Traditional lead-acid batteries have low energy efficiency and serious pollution, while lithium-ion batteries have high costs and need to be improved in safety due to the shortage of lithium resources. Therefore, in order to save resource costs and meet people's growing needs, it is necessary to develop new energy storage batteries. Based on this, sodium-ion batteries came into being. Although there are some sodium-ion battery power structures used in automobiles, most of these structures still have relatively poor safety performance. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a sodium ion battery power supply structure and a vehicle thereof, which can ensure the safe and stable operation of the power supply structure and improve its safety performance.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] Provided is a sodium ion battery power supply structure, comprising a box and a sodium ion battery module, a BMS module, a current detection element, and a switch element arranged in the box, wherein the BMS module has a BMS current limiting module, the negative electrode and the current detection element of the sodium ion battery module are connected to the BMS current limiting module, and the positive electrode of the sodium ion battery module is connected to the switch element; the box is provided with a negative terminal connected to the current detection element and a positive terminal connected to the switch element.

[0006] Preferably, the sodium ion battery module comprises a plurality of sodium ion cells and a mounting hole frame, wherein the plurality of sodium ion cells are arranged and stacked through the mounting hole frame; the sodium ion cells between different layers are connected through a third connecting bar, and the sodium ion cells between the same layer are connected through a bus, and the third connecting bar is connected to the bus; the sodium ion cells, the mounting hole frame, the third connecting bar, and the bus constitute a multi-layer cell structure; the sodium ion battery module also comprises an insulating bracket, and the multi-layer cell structure is detachably mounted in the box through the insulating bracket.

[0007] Preferably, the insulating support includes an insulating plate arranged on the outside of the multi-layer battery cell structure and between adjacent layers of the multi-layer battery cell structure, and the bus is abutted against the insulating plate; adjacent insulating plates are connected by a support member, and a pull rod is inserted into the support member to facilitate the removal of the multi-layer battery cell structure.

[0008] Preferably, the BMS module, the current detection component and the switch component are all mounted on the insulating bracket via a connecting seat; wherein the connecting seat comprises a receiving plate and a connecting plate connected to the receiving plate at an angle, the BMS module is mounted on the receiving plate, the current detection component and the switch component are all mounted on the connecting plate; and the connecting plate is connected to the insulating bracket.

[0009] Preferably, the current detection element is a shunt, and the shunt is connected to the negative terminal through a first connecting bar; the switch element is a relay, and the relay is connected to the positive terminal through a fourth connecting bar.

[0010] Preferably, a control panel and a wiring harness interface electrically connected to the BMS module are provided on the outer side wall of the box.

[0011] Preferably, a plurality of air valves are provided on the outer side wall of the box body.

[0012] Preferably, the box body includes a box body and a box cover detachably and sealingly connected to the box body, a limit frame is provided in the box body, the sodium ion battery module is clamped in the limit frame, and a heat conduction channel is provided on the limit frame; the inner side wall of the box body is provided with a thermal insulation layer.

[0013] Preferably, the outer side of the box body is connected with a mounting frame for in-vehicle installation and a hoisting frame for facilitating hoisting and maintenance.

[0014] The utility model also provides a car, comprising the above-mentioned sodium ion battery power source structure.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model discloses a sodium ion battery power supply structure and a vehicle thereof. The arrangement of a BMS module and a current detection component can be used to perform data monitoring and protection on a sodium ion battery module. The arrangement of a BMS current limiting module enables the power supply structure to have a current limiting function, can limit power and play a protective role during instantaneous start-up, can ensure safe and stable operation of the power supply structure, can improve its safety performance, and further can ensure the driving safety performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a sodium ion battery power supply structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of a sodium ion battery power supply structure of the utility model;

[0019] Figure 3 This is a connection diagram of a sodium ion battery power supply structure of the utility model;

[0020] Figure 4 It is a partial structural schematic diagram of the sodium ion battery module of the utility model;

[0021] Figure 5 for Figure 4 An enlarged schematic diagram of part I;

[0022] Figure 6 This is a schematic diagram of the structure of the insulating bracket of the utility model;

[0023] Figure 7 This is a structural schematic diagram of the connecting seat of the utility model;

[0024] Figure 8 It is a structural schematic diagram of the box body of the utility model.

[0025] The illustrations are as follows:

[0026] 1-box, 11-box body, 12-box cover, 13-limiting frame, 131-heat conduction channel, 14-sealing pad, 15-mounting frame, 16-lifting frame, 17-mounting ear, 2-sodium ion battery module, 21-sodium ion battery cell, 22-mounting hole frame, 23-third connecting row, 24-bus bar, 241-connecting ear, 25-insulating bracket, 251-insulating plate, 252-support, 253-pull rod, 3- Negative branch, 31-BMS module, 32-BMS current limiting module, 33-current detection component, 34-first connecting row, 35-second connecting row, 4-positive branch, 41-switch component, 42-fourth connecting row, 43-fifth connecting row, 51-negative terminal, 52-positive terminal, 6-connecting seat, 61-supporting plate, 62-connecting plate, 7-control panel, 8-wiring harness interface, 9-vent valve, 10-wiring harness bracket. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, 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 the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0033] Example 1

[0034] like Figures 1 to 7 The first embodiment of a sodium ion battery power supply structure of the utility model is shown, including a box body 1 and a sodium ion battery module 2, a BMS module 31, a current detection component 33, and a switch component 41 arranged in the box body 1. The BMS module 31 has a BMS current limiting module 32. The negative electrode and the current detection component 33 of the sodium ion battery module 2 are connected to the BMS current limiting module 32, and the positive electrode of the sodium ion battery module 2 is connected to the switch component 41; the box body 1 is provided with a negative terminal 51 connected to the current detection component 33 and a positive terminal 52 connected to the switch component 41.

[0035] The BMS module 31 and the current detection component 33 can be used to monitor and protect the sodium ion battery module 2. The BMS current limiting module 32 enables the power structure to have a current limiting function, which can limit power and play a protective role during instantaneous startup, thereby ensuring that the power structure works safely and stably and improving its safety performance.

[0036] like Figure 2 , Figure 4 and Figure 5As shown, the sodium ion battery module 2 includes a plurality of sodium ion cells 21 and a mounting hole frame 22, and the plurality of sodium ion cells 21 are arranged and stacked through the mounting hole frame 22; the sodium ion cells 21 between different layers are connected through the third connecting bar 23, and the sodium ion cells 21 between the same layer are connected through the bus 24, and the third connecting bar 23 is connected with the bus 24; the sodium ion cells 21, the mounting hole frame 22, the third connecting bar 23, and the bus 24 form a multi-layer cell structure; the sodium ion battery module 2 also includes an insulating bracket 25, and the multi-layer cell structure is detachably installed in the box 1 through the insulating bracket 25. Specifically, a connecting ear 241 is fixedly connected to the edge of the bus 24, and the bus 24 is connected to the third connecting bar 23 through the connecting ear 241. In this embodiment, the number of sodium ion cells 21 in the multi-layer cell structure can be arranged according to the volume size of the box 1. It should be noted that the layers of the stacked arrangement of the sodium ion battery cells 21 refer to the stacked arrangement along the direction from the positive electrode to the negative electrode of the sodium ion battery cells 21 .

[0037] like Figure 2 and Figure 6 As shown, the insulating bracket 25 includes an insulating plate 251 arranged on the outside of the multi-layer battery cell structure and between adjacent layers of the multi-layer battery cell structure, and the bus 24 is against the insulating plate 251; adjacent insulating plates 251 are connected by a support member 252, and a pull rod 253 is also inserted in the support member 252 for facilitating the removal of the sodium ion battery module 2, and one end of the pull rod 253 is connected to the insulating plate 251 located on the outside of the multi-layer battery cell structure.

[0038] Specifically, in order to make the insulating support 25 more stable, the insulating plate 251 located on the outside of the multi-layer battery structure includes a pressure plate and an insulating sheet stacked from the outside to the inside, and the other side of the insulating sheet here is against the bus 24; and in order to make the insulating support 25 more portable, the insulating plate 251 located between adjacent layers of the multi-layer battery structure can be set as an insulating sheet, and both sides of the insulating sheet here are against the bus 24 at the corresponding position. In this embodiment, several positions are vacated in the multi-layer battery structure for installing the support member 252, wherein the support member 252 is a cylindrical structure, the cylindrical structure is adapted to the hole position on the mounting hole frame 22, and the cylindrical structures between different layers can be arranged at corresponding positions, and the positions corresponding to the cylindrical structures on the insulating plate 251 and the bus 24 are provided with through holes, so that the pull rod 253 can be arranged through the multi-layer battery structure. In this embodiment, the pull rod 253 can be a long bolt.

[0039] like Figure 2 and Figure 7As shown, the BMS module 31, the current detection component 33, and the switch component 41 are all mounted on the insulating bracket 25 through the connecting seat 6; wherein the connecting seat 6 includes a receiving plate 61 and a connecting plate 62 connected to the receiving plate 61 at an angle, the BMS module 31 is mounted on the receiving plate 61, and the current detection component 33 and the switch component 41 are all mounted on the connecting plate 62; and the connecting plate 62 is connected to the insulating bracket 25. In this embodiment, the receiving plate 61 and the connecting plate 62 are arranged vertically and the two are integrally formed, and the connecting plate 62 is located at the outer side of the insulating bracket 25.

[0040] like Figure 2 and Figure 3 As shown, the current detection element 33 is a shunt, which is connected to the negative terminal 51 through the first connecting bar 34, and the shunt is connected to the BMS current limiting module 32 through the second connecting bar 35; the BMS module 31, the BMS current limiting module 32, the second connecting bar 35, the shunt, and the first connecting bar 34 constitute the negative electrode branch 3 between the negative electrode and the negative terminal 51 of the sodium ion battery module 2. The switch element 41 is a relay, which is connected to the positive terminal 52 through the fourth connecting bar 42, and the relay is connected to the positive electrode of the sodium ion battery module 2 through the fifth connecting bar 43; the fifth connecting bar 43, the relay, and the fourth connecting bar 42 constitute the positive electrode branch 4 between the positive electrode and the positive terminal 52 of the sodium ion battery module 2. In this embodiment, the first connecting bar 34, the second connecting bar 35, the third connecting bar 23, the fourth connecting bar 42, and the fifth connecting bar 43 are all copper bars.

[0041] Example 2

[0042] This embodiment is similar to embodiment 1, except that Figure 1 As shown, in this embodiment, a control panel 7 and a harness interface 8 electrically connected to the BMS module 31 are installed on the outer wall of the box 1. The harness interface 8 can be used to communicate with the external vehicle communication harness for vehicle communication. A number of breathable valves 9 are provided on the outer wall of the box 1. For ease of operation, the negative terminal 51, the positive terminal 52, the control panel 7, the harness interface 8, and the breathable valve 9 can all be set on the same surface of the box body 11. In order to protect the negative terminal 51 and the positive terminal 52, a protective shell can be provided at the negative terminal 51 and the positive terminal 52.

[0043] like Figure 1 and Figure 8As shown, the box body 1 includes a box body 11 and a box cover 12 which is detachably and sealedly connected to the box body 11. A limit frame 13 is provided inside the box body 11. The sodium ion battery module 2 is clamped in the limit frame 13. The setting of the limit frame 13 can realize the reliable positioning and assembly of the sodium ion battery module 2 in the box body 11. The limit frame 13 is also provided with a heat conduction channel 131; the inner side wall of the box body 11 is provided with a heat preservation layer. Among them, a sealing gasket 14 is provided between the box body 11 and the box cover 12 to improve the sealing performance between the two, so that an IP67-level space can be formed inside the box body 1. The heat conduction channel 131 is a plurality of heat conduction holes provided on the limit frame 13. The heat preservation layer can be a melamine heat preservation cotton layer, so that the car with the power structure can meet the normal operation in a low-temperature harsh environment, and improve the low-temperature performance of the power structure.

[0044] like Figure 8 As shown, the outer side of the box body 11 is connected with a mounting frame 15 and a mounting ear 17 for in-vehicle installation, and is also connected with a hoisting frame 16 for convenient hoisting and maintenance. In order to facilitate the placement of the wire harness, the outer side of the box body 11 is also connected with a wire harness bracket 10.

[0045] In this embodiment, the shape of the box body 11 can be a regular rectangular shape, or it can be set to an irregular shape according to the interior space of the vehicle to be installed. Figure 1 As shown, the box body 11 may be provided with protrusions and depressions, and the stacking arrangement of the sodium ion battery cells 21 in the box body 11 will also be arranged according to the shape of the box body 11 .

[0046] Example 3

[0047] The utility model also provides a car, comprising the sodium ion battery power structure described in embodiment 1 or 2, and the sodium ion battery power structure can be installed in the car through a mounting frame 15 and a mounting ear 17.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0049] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A sodium ion battery power structure, characterized in that: The invention comprises a housing (1), a sodium ion battery module (2), a BMS module (31), a current detection element (33), and a switch element (41) arranged in the housing (1); the BMS module (31) comprises a BMS current limiting module (32); the negative electrode and the current detection element (33) of the sodium ion battery module (2) are both connected to the BMS current limiting module (32); the positive electrode of the sodium ion battery module (2) is connected to the switch element (41); and the housing (1) is provided with a negative terminal (51) connected to the current detection element (33) and a positive terminal (52) connected to the switch element (41); The sodium ion battery module (2) comprises a plurality of sodium ion cells (21) and a mounting hole frame (22), wherein the plurality of sodium ion cells (21) are arranged and stacked through the mounting hole frame (22); the sodium ion cells (21) in different layers are electrically connected through a third connecting bar (23), and the sodium ion cells (21) in the same layer are electrically connected through a bus bar (24), wherein the third connecting bar (23) is electrically connected to the bus bar (24); the sodium ion cells (21), the mounting hole frame (22), the third connecting bar (23), and the bus bar (24) form a multi-layer cell structure; the sodium ion battery module (2) further comprises an insulating bracket (25), and the multi-layer cell structure is detachably mounted in the box body (1) through the insulating bracket (25).

2. The sodium ion battery power structure according to claim 1, characterized in that: The insulating support (25) includes an insulating plate (251) arranged on the outside of the multi-layer battery cell structure and between adjacent layers of the multi-layer battery cell structure, and the busbar (24) is in abutment with the insulating plate (251); adjacent insulating plates (251) are connected by a support member (252), and a pull rod (253) is inserted into the support member (252) for facilitating the removal of the multi-layer battery cell structure.

3. The sodium ion battery power structure according to claim 1, characterized in that: The BMS module (31), the current detection component (33), and the switch component (41) are all mounted on the insulating bracket (25) via a connecting seat (6); wherein the connecting seat (6) comprises a receiving plate (61) and a connecting plate (62) connected to the receiving plate (61) at an angle; the BMS module (31) is mounted on the receiving plate (61); the current detection component (33) and the switch component (41) are all mounted on the connecting plate (62); and the connecting plate (62) is connected to the insulating bracket (25).

4. The sodium ion battery power structure according to any one of claims 1 to 3, characterized in that: The current detection element (33) is a shunt, which is connected to the negative terminal (51) via a first connection row (34); the switch element (41) is a relay, which is connected to the positive terminal (52) via a fourth connection row (42).

5. The sodium ion battery power structure according to any one of claims 1 to 3, characterized in that: A control panel (7) and a wiring harness interface (8) electrically connected to the BMS module (31) are provided on the outer side wall of the box body (1).

6. The sodium ion battery power structure according to any one of claims 1 to 3, characterized in that: A plurality of air-permeable valves (9) are provided on the outer side wall of the box body (1).

7. The sodium ion battery power structure according to any one of claims 1 to 3, characterized in that: The box body (1) comprises a box body (11) and a box cover (12) detachably and hermetically connected to the box body (11); a limiting frame (13) is provided inside the box body (11); the sodium ion battery module (2) is clamped in the limiting frame (13); a heat conduction channel (131) is provided on the limiting frame (13); and an inner side wall of the box body (11) is provided with a heat insulation layer.

8. The sodium ion battery power source structure according to any one of claims 1 to 3, characterized in that: The outer side of the box body is connected with a mounting frame (15) for in-vehicle installation and a hoisting frame (16) for facilitating hoisting and maintenance.

9. A car, characterized in that: A sodium ion battery power source structure comprising any one of claims 1 to 8.

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