Safe explosion-proof sodium ion battery system

Abstract

The utility model relates to a safe explosion-proof sodium ion battery system in the field of storage battery production. The safe explosion-proof sodium ion battery system comprises a battery cell module, a fixed plate, an explosion-proof battery shell, a CCS integrated busbar, a cover plate and a protection plate, the battery cell module is formed by connecting eight sodium ion battery cells in series through a CCS integrated busbar; the anti-explosion battery shell comprises a battery jar and a battery cover; the CCS integrated busbar is laid above the battery cell module, and each sodium ion battery cell is correspondingly and electrically connected with the CCS integrated busbar; the protection plate is arranged on one side of the battery cell module through the insulating bracket; the cover plate is arranged between the CCS integrated busbar and the battery cover in a covering manner; a battery positive electrode and a battery negative electrode are arranged on the battery cover and are electrically connected with the battery cell module through the protection plate. The sodium-ion battery system can effectively improve the low-temperature discharge performance and the cycle life of the storage battery, solves the problems of electric appliance burning and splash screen of the battery system, and improves the explosion-proof performance and the safety coefficient of the battery in the use process.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and particularly relates to a safe and explosion-proof sodium-ion battery system. Background Art

[0002] A storage battery refers to a mobile power storage device that can be repeatedly charged and discharged. Currently, the commonly used storage batteries mainly include two types of battery systems: lead-acid batteries and lithium-ion batteries. At present, the parking air-conditioning battery system on trucks is mostly two series-connected 12V lead-acid battery packs. However, lead-acid batteries have disadvantages such as low specific energy, large volume and weight, poor large-current discharge capacity, short endurance mileage, and short cycle life. And the current lithium-ion battery systems on the market have problems such as poor renewability, high manufacturing cost, and safety hazards such as easy burning of electrical appliances, screen flashing, and battery explosion, as well as technical problems such as poor low-temperature discharge performance resulting in the inability of vehicles to start in low-temperature areas. Therefore, there is an urgent need to find a battery system with a long cycle life, good low-temperature performance, and high safety factor. Summary of the Utility Model

[0003] In view of the above situation, the utility model provides a safe and explosion-proof sodium-ion battery system, which can effectively improve the low-temperature discharge performance and cycle life of the storage battery, and at the same time solve the problems of burning electrical appliances and screen flashing in the battery system, and improve the explosion-proof performance and safety factor during the use of the battery.

[0004] In order to achieve the above objectives, the utility model adopts the following technical solutions:

[0005] A safe and explosion-proof sodium-ion battery system includes a battery cell module, a fixing plate, an explosion-proof battery case, a CCS integrated busbar, a cover plate, and a protection board.

[0006] The battery cell module is composed of a plurality of sodium-ion battery cells connected to each other through the CCS integrated busbar. Preferably, the battery cell module is formed by connecting eight sodium-ion battery cells in series and welding them through the CCS integrated busbar; the sodium-ion battery cells are square-shell sodium-ion battery cells, and a positive electrode post and a negative electrode post are provided on the top cover of each sodium-ion battery cell.

[0007] Preferably, steel belts are also tightly clamped on the upper and lower sides of the outer side of the battery cell module after the eight sodium-ion battery cells are connected in series and welded; the lower part of the battery cell module is fixed to the bottom of the battery slot through the fixing plate and screws.

[0008] The explosion-proof battery case includes a battery slot and a battery cover hermetically covered on the top of the battery slot; the battery cell module is fixedly supported inside the battery slot through the fixing plate.

[0009] Preferably, the battery tank is a square box - type steel explosion - proof housing. An integral flanging is provided on the outer periphery of the top opening of the battery tank, and a first flange is fixedly provided. The battery cover is a rectangular steel explosion - proof cover plate. An integral flange, which is bolted to cooperate with the first flange of the battery tank, is fixedly provided around the battery cover. And a sealing strip is also provided in cooperation between the two flanges.

[0010] The CCS integrated busbar is laid above the battery cell module. The positive and negative electrodes of each sodium - ion battery cell are electrically connected to the corresponding connection buses on the CCS integrated busbar respectively.

[0011] The protection board is arranged on one side of the battery cell module through an insulating bracket; the cover plate is covered between the CCS integrated busbar and the battery cover, playing a role of insulation isolation.

[0012] The battery cover is provided with a battery positive electrode and a battery negative electrode. The battery positive and negative electrodes are electrically connected to the battery cell module through the protection board.

[0013] Preferably, the positive and negative electrodes of each sodium - ion battery cell are respectively positioned and welded to the corresponding positive and negative connection buses on the CCS integrated busbar.

[0014] Preferably, the positive and negative power electrodes of the protection board are respectively electrically connected to the positive and negative connection buses of the CCS integrated busbar through flexible copper bars.

[0015] Preferably, both the battery positive electrode and the battery negative electrode are copper terminal posts, and insulating seats are respectively provided between the battery positive and negative electrodes and the battery cover.

[0016] Preferably, the battery positive and negative electrodes are respectively electrically connected to the positive and negative connection buses of the CCS integrated busbar through silicone copper wires and the protection board.

[0017] Preferably, the battery cover is also provided with a safety valve. The safety valve is a water - blocking and breathable valve, which is used to ensure the pressure balance inside and outside the explosion - proof battery shell.

[0018] Preferably, the battery cover is also provided with a strong - start button, which is used to forcibly start the emergency power - supply function of the battery system.

[0019] The present utility model also includes other components that enable its normal use, which are all conventional means in the art. In addition, the devices or components not defined in the present utility model, such as square - shell sodium - ion battery cells, CCS integrated busbars, protection boards, safety valves, strong - start buttons, etc., all adopt the existing technologies in the art.

[0020] The beneficial effects of the present utility model are as follows:

[0021] A safe and explosion-proof sodium-ion battery system provided by the present utility model adopts a single 24V sodium-ion battery system. By changing the parking battery material system, the battery performance can be improved, effectively enhancing the low-temperature discharge performance and cycle life of the battery, greatly improving the battery life and low-temperature starting ability, enabling the vehicle to be safely used in extreme environments. In order to increase battery safety and prevent starting failure in special environments, a protection board design, a forced start design, and a battery safety and explosion-proof design are carried out, greatly improving the reliability and safety of the system. Moreover, a matching intelligent protection system and explosion-proof design are designed to solve the problems of burning electrical appliances and screen flashing during the use of the battery system, while improving the explosion-proof performance and safety factor of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the sodium-ion battery system in the embodiment.

[0023] In the figure: 1, battery cover; 2, battery slot; 3, sodium-ion battery cell; 4, protection board; 5, CCS integrated busbar; 6, cover plate; 7, terminal; 8, safety valve; 9, forced start button; 10, sealing strip; 11, flexible copper busbar; 12, steel strip; 13, fixing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all embodiments.

[0025] It should be noted that the orientation or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "inner", "outer", etc. are all based on the drawings shown, only for the convenience of description.

[0026] Embodiment

[0027] As Figure 1 shown, a safe and explosion-proof sodium-ion battery system includes a battery cell module, a fixing plate 13, an explosion-proof battery case, a CCS integrated busbar 5, a cover plate 6, and a protection board 4.

[0028] The battery cell module is formed by connecting eight parallelly arranged sodium-ion battery cells 3 in series through the CCS integrated busbar; the sodium-ion battery cells are square-shell sodium-ion battery cells, and a positive electrode post and a negative electrode post are provided on the top cover of each sodium-ion battery cell.

[0029] The CCS integrated busbar is laid above the battery cell module, and the positive and negative electrodes of each sodium-ion battery cell are electrically connected to the corresponding connection rows on the CCS integrated busbar.

[0030] The sodium-ion battery cells and the CCS integrated busbar are all prior arts in the field and will not be elaborated here in detail.

[0031] The CCS integrated busbar is an aluminum busbar with a thickness of 2 mm. The positive and negative electrodes of each sodium-ion battery cell are respectively welded in position with the corresponding positive and negative connection bars on the CCS integrated busbar through a laser welding device. A Z-shaped structural adhesive is applied between adjacent two battery cells for bonding and fixing, and the structural adhesive is an epoxy heat-conducting structural adhesive. Moreover, steel belts 12 are clamped and tightened on the upper and lower parts of the outer side of the battery cell module after eight sodium-ion battery cells are connected in series by welding. A buffer pad is arranged between the steel belt and the battery cell module, and the buffer pad is a double-sided adhesive foam pasted on the outer sides of both ends of the battery cell module. The lower part of the battery cell module is fixed to the bottom of the battery slot through a fixing plate and long rod screws.

[0032] The explosion-proof battery case includes a battery slot 2 and a battery cover 1 hermetically covered on the top of the battery slot. The battery slot is a box-shaped steel explosion-proof housing with a thickness of 3 mm formed by sheet metal welding. A flange edge one is integrally flanged and fixed on the outer periphery of the top opening of the battery slot. The battery cover is a rectangular steel explosion-proof cover plate with a thickness of 3 mm. A flange edge two that is bolted and connected with the flange edge one of the battery slot is integrally fixed on the periphery of the battery cover. And a sealing strip 10 is also arranged between the two flange edges to ensure that the sealing grade of the housing can reach the IP67 grade.

[0033] The protection board is arranged on one side of the battery cell module through an insulating bracket. The protection board has function designs such as overvoltage protection, undervoltage protection, overheat protection, wireless communication, and intelligent balancing, etc., and can effectively protect the charge and discharge consistency and safety of the battery system during use.

[0034] The cover sheet is a rectangular epoxy board and is covered between the CCS integrated busbar and the battery cover to prevent direct electrical connection between the CCS integrated busbar and the battery cover.

[0035] The battery cover is provided with a battery positive electrode and a battery negative electrode, and the battery positive and negative electrodes are electrically connected with the battery cell module through the protection board.

[0036] The positive and negative electrodes of the power supply of the protection board are respectively electrically connected with the positive and negative connection bars of the CCS integrated busbar through a flexible copper busbar 11 with a width of 20 mm and a thickness of 2 mm.

[0037] Both the battery positive electrode and the battery negative electrode are 200A integrated copper terminal posts 7, and plastic insulating seats are respectively arranged between the battery positive and negative electrodes and the battery cover to ensure the discharge overcurrent performance and mechanical installation performance of the battery output terminal posts.

[0038] The battery positive and negative electrodes are respectively electrically connected with the positive and negative connection bars of the CCS integrated busbar through 8AWG standard silicone copper wires and the protection board.

[0039] An explosion-proof valve 8 is also provided on the battery cover. The explosion-proof valve is an M10 type water-blocking and breathable valve, which is used to ensure the pressure balance inside and outside the explosion-proof battery case and improve the explosion-proof safety of the battery system.

[0040] The terminal and the explosion-proof valve are both prior arts in the art, and will not be elaborated herein.

[0041] A forced start button 9 is also provided on the battery cover, which is used to forcibly start the emergency power supply function of the battery system. For example, it can supply emergency power for the truck parking start, and the daily appliances of the RV and heavy truck. The forced start button is electrically connected to the protection board.

[0042] The forced start button and the protection board are both prior arts in the art, and will not be elaborated herein.

[0043] The technical solution of the present utility model is not limited to the limitations of the above specific embodiments. Without departing from the scope and spirit of the illustrated embodiments, many modifications and changes are obvious to those of ordinary skill in the art. Any technical deformation made within the spirit and principle of the present utility model falls within the protection scope of the present utility model.

Claims

1. A safe explosion-proof sodium ion battery system, comprising a battery cell module, a fixing plate and an explosion-proof battery shell, characterized in that: It also includes a CCS integrated busbar, a cover sheet and a protection plate; the battery module is composed of a plurality of sodium ion batteries interconnected by the CCS integrated busbar; the explosion-proof battery shell includes a battery slot and a battery cover with a sealing cover arranged on the top of the battery slot; the battery module is fixedly supported inside the battery slot by a fixing plate; the CCS integrated busbar is laid above the battery module, and the positive and negative electrodes of each of the sodium ion batteries are electrically connected to the corresponding connecting bars on the CCS integrated busbar respectively; the protection plate is arranged on one side of the battery module through an insulating bracket; the cover sheet is arranged between the CCS integrated busbar and the battery cover; the battery cover is provided with a positive electrode and a negative electrode of the battery, and the positive and negative electrodes of the battery are electrically connected to the battery module through the protection plate.

2. A safe explosion-proof sodium ion battery system according to claim 1, characterized in that: The battery cell module is formed by welding eight sodium ion batteries in series through the CCS integrated busbar; the sodium ion batteries are square shell sodium ion batteries, and a positive electrode column and a negative electrode column are arranged on the top cover of each of the sodium ion batteries.

3. A safe explosion-proof sodium ion battery system according to claim 2, characterized in that: The positive and negative electrodes of each of the sodium ion cells are welded to the corresponding positive and negative electrode connection bars on the CCS integrated busbar.

4. A safe explosion-proof sodium ion battery system according to claim 3, characterized in that: The battery slot is a square box-type steel explosion-proof shell, and a flange edge 1 is integrally fixed on the outer periphery of the top opening of the battery slot. The battery cover is a rectangular steel explosion-proof cover plate, and a flange edge 2 is integrally fixed on the periphery of the battery cover and is fixedly connected to the flange edge 1 of the battery slot with matching bolts, and a sealing strip is also arranged between the two flange edges.

5. A safe explosion-proof sodium ion battery system according to claim 4, characterized in that: The upper and lower parts of the outer side of the cell module after the eight sodium ion cells are welded in series are also tightened with steel belts; the lower part of the cell module is fixed to the bottom of the battery tank by a fixing plate and screws.

6. A safe explosion-proof sodium ion battery system according to claim 1, characterized in that: The positive and negative electrodes of the power supply of the protection board are electrically connected to the positive and negative electrode connection bars of the CCS integrated busbar through soft copper bars.

7. A safe explosion-proof sodium ion battery system according to claim 6, characterized in that: The positive electrode and the negative electrode of the battery are both copper terminals, and insulating seats are provided correspondingly between the positive electrode, the negative electrode and the battery cover.

8. A safe explosion-proof sodium ion battery system according to claim 7, characterized in that: The positive and negative electrodes of the battery are electrically connected to the positive and negative electrode connection bars of the CCS integrated busbar through silicone copper wires and protection plates respectively.

9. A safe explosion-proof sodium ion battery system according to claim 1, characterized in that: The battery cover is also provided with a safety valve, which is a water-blocking and air-permeable valve.

10. A safe explosion-proof sodium ion battery system according to claim 1, characterized in that: The battery cover is also provided with a forced start button.

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