Insulating oil battery box

Abstract

The utility model discloses an insulating oil battery box and belongs to the technical field of new energy batteries. The battery box comprises a battery box body, a plurality of single-row battery cells are arranged in the battery box body at intervals, and each single-row battery cell is formed by arranging and connecting a plurality of battery cells; an elastic supporting assembly is arranged between every two adjacent single-row battery cells, each elastic supporting assembly comprises a supporting plate, a plurality of spring assemblies are arranged on the two faces of each supporting plate at intervals, one end of each spring assembly is fixed to the corresponding supporting plate, the other end of each spring assembly is attached to the side wall of the corresponding single-row battery cell, and the battery box body is filled with insulating oil. According to the utility model, the whole battery module is immersed in the insulating oil, and the insulating oil has good insulation, arc extinguishing, high melting point and large specific heat capacity, so that moisture in air can be effectively prevented from entering the battery module, and the temperature and temperature difference control of the whole battery module is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, in particular to an insulating oil battery box. Background Art

[0002] In the actual application process, a battery module is a system composed of many single cells in series and parallel. During the charging and discharging process of the battery box, different amounts of heat will be generated on the surface of the battery cells according to different operating conditions. When the heat accumulates to a certain extent, it will affect the performance and lifespan of the entire battery box system, and even affect the safety of the entire system.

[0003] In the prior art, there are generally two measures to solve the overheating of the battery module: air-cooling measure and liquid-cooling measure. The liquid-cooling measure is to install liquid-cooling pipelines at the bottom of the entire battery module, and an external liquid-cooling unit is used to supply liquid coolant to the liquid-cooling pipelines, so that the liquid coolant flows in the pipelines to take away the heat of the battery box. This solution is to configure liquid-cooling pipelines and a liquid-cooling unit, and the cooling of the battery box generally starts from the bottom of the battery cells. The cooling effect is slow, and the temperature of the battery module is not balanced during the cooling process. The temperature of the lower layer is lower than that of the upper layer, and the temperature difference is large during the cooling process, resulting in a relatively fast attenuation of the lifespan of the battery module. The air-cooling measure is to install fans on the outer shell of the entire battery module, and the fans are used to cool the entire battery box by circulating air. This solution requires that the temperature drops unevenly during the air-cooling process of the entire battery module, the temperature drops very slowly, and the cooling effect is easily affected by the external environmental temperature, so the effect is poor. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the utility model provides an insulating oil battery box. The battery box is filled with insulating oil. Since the insulating oil has good insulation, arc extinguishing, high melting point, large specific heat capacity, and can effectively prevent moisture in the air from entering, the entire battery module works under the condition of being immersed in the insulating oil. Therefore, this structural design can effectively improve the temperature difference between the single cells of the battery module of the battery, make the entire module in a stable state, better exert the performance and safety of the module, and can also prevent the battery module from catching fire and burning in case of a safety accident, prevent further accidents of the battery cells, and reduce the damage caused by safety accidents.

[0005] To achieve the above object, the utility model designs an insulating oil battery box. The battery box includes a battery box, and a plurality of single-row battery cells are arranged at intervals in the battery box. The single-row battery cells are formed by connecting a plurality of battery cells in series. Elastic support components are arranged between adjacent single-row battery cells. The elastic support components include a support plate, and a plurality of spring components are arranged at intervals on both sides of the support plate. One end of the spring component is fixed on the support plate, and the other end is attached to the side wall of the single-row battery cell. The battery box is filled with insulating oil. The elastic support components are used to prevent the battery cells from being squeezed and damaged during the expansion process of the battery cells.

[0006] Preferably, the insulating oil is a hydrocarbon insulating oil.

[0007] Preferably, the spring assembly includes a spring sleeve, a spring is arranged inside the spring sleeve, a spring limiting ring is fixed at the inner wall edge of one end of the spring sleeve, the other end is fixed on the support plate, and a support sub-assembly is slidably arranged inside the limiting ring.

[0008] Preferably, the support sub-assembly includes a support column, the support column is slidably arranged inside the limiting ring, a limiting step matched with the limiting ring is installed on the side wall of the support column, one end of the support column is attached to the spring, and the other end is fixed with a attaching plate, and the attaching plate is attached to the side wall of the single-row battery cells.

[0009] Preferably, a plurality of spring fixing columns matched with the spring are fixed on the support plate, and the spring is sleeved on the spring fixing columns.

[0010] Preferably, threaded holes are provided on the support plate, two mounting plates are symmetrically fixed at the outer wall edge of the end of the spring sleeve far away from the spring limiting ring, through holes corresponding to the threaded holes are provided on the mounting plates, bolts are arranged inside the through holes, and the mounting plates are fixed on the support plate by the bolts passing through the through holes.

[0011] Preferably, a liquid inlet and a liquid outlet are provided on the side wall of the battery box body.

[0012] Preferably, the liquid inlet and the liquid outlet are respectively arranged on the opposite side walls of the box body and the height of the liquid outlet is higher than that of the liquid inlet. The liquid inlet and the liquid outlet are connected to the cooling circulation system of the vehicle. By setting the height of the liquid outlet higher than that of the liquid inlet, the insulating oil at the upper layer after temperature rise can be smoothly discharged, so that the whole cooling circulation system operates efficiently.

[0013] Preferably, the battery cells are rectangular and pole columns are arranged at the top, and the side walls of adjacent battery cells are arranged in a fitting manner along the length direction to form a single-row battery cells. Through this setting method, the large surfaces of the battery cells can be immersed in the insulating oil.

[0014] Preferably, the single-row battery cells and the elastic support assembly form a battery module, and a module tie strap is wound around the outer circle of the battery module.

[0015] Preferably, structural adhesive is provided at the bottom inside the battery box body, and the single-row battery cells and the support plate of the elastic support assembly are fixed on the bottom plate of the battery box body through the structural adhesive.

[0016] Advantages of the utility model:

[0017] 1. The utility model forms a cavity through the elastic support components between the sides of adjacent single-row battery cells, enabling the hydrocarbon insulating oil to wrap the entire single-row battery cell. Since the insulating oil has good insulation, arc extinguishing, high melting point, large specific heat capacity, and can effectively prevent moisture in the air from entering, it is more conducive to the temperature and temperature difference control of the entire battery module. The temperature of each battery cell is more balanced as a whole, and there will be no problem of large temperature difference on the same battery cell.

[0018] 2. The utility model eliminates the condensate water on the surface of the battery module due to temperature difference changes. Since the battery module is immersed in the insulating oil and there is no participation of air in the surrounding environment, no condensate water will appear when the temperature around the module changes violently, thus avoiding the failure of the product's insulation withstand voltage caused by the generation of moisture.

[0019] 3. The utility model avoids the structural deformation of the battery module caused by the use of fixed brackets during long-term use through the elastic support components.

[0020] 4. The utility model immerses the entire battery module in the insulating oil, eliminating the fire caused by safety accidents of the battery module; at the same time, when a single battery cell has its explosion-proof valve opened or thermal runaway occurs, the immersed insulating liquid cooling can effectively reduce the temperature of the entire battery pack and reduce the degree of deterioration of the situation caused by temperature. Description of the Drawings

[0021] Figure 1 Is the perspective view of the present utility model;

[0022] Figure 2 Is the perspective view of the battery box of the present utility model;

[0023] Figure 3 Is the perspective view of the battery module of the present utility model;

[0024] Figure 4 Is the perspective view of the elastic support component of the present utility model;

[0025] Figure 5 Is the perspective view of the spring support plate of the present utility model;

[0026] Figure 6 Is the perspective view of the spring component of the present utility model;

[0027] Figure 7 Is Figure 6 The explosion effect diagram of;

[0028] Figure 8 Is the perspective view of the spring sleeve of the present utility model.

[0029] Reference Signs:

[0030] 1 Battery box body, 11 Liquid inlet, 12 Liquid outlet,

[0031] 2 single-row battery cells, 21 battery cells, 211 electrode posts,

[0032] 3 elastic support components, 31 support plates, 311 threaded holes, 32 spring sleeves, 33 spring limit rings, 34 mounting plates, 341 through holes, 35 springs, 36 support columns, 361 limit steps, 37 attaching plates, 38 spring fixing columns, 39 bolts,

[0033] 4 module cable ties. Detailed implementation manners

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0038] Reference to "one embodiment" or "some embodiments" etc. described in the specification of this application means that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized.

[0039] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] Embodiment

[0041] As Figures 1 to 8 shown, it includes a battery box body 1, and a liquid inlet 11 and a liquid outlet 12 are provided on the side wall of the battery box body 1. The liquid inlet 11 and the liquid outlet 12 are symmetrically arranged and the height of the liquid outlet 12 is higher than that of the liquid inlet 11. A plurality of single-row battery cells 2 are arranged at intervals in the battery box body 1, and the single-row battery cells 2 are formed by arranging and connecting a plurality of battery cells 21; the battery cells 21 are rectangular and a pole column 211 is provided at the top, and the side walls of adjacent battery cells 2 are attached along the length direction to form the single-row battery cells 2. The single-row battery cells 2 and the elastic support assembly 3 form a battery module, and a module tie strap 4 is wound around the outer circle of the battery module. Structural adhesive is provided at the bottom inside the battery box body 1, and the single-row battery cells 2 and the elastic support assembly 3 are fixed on the bottom plate of the battery box body 1 through the structural adhesive.

[0042] An elastic support assembly 3 is provided between adjacent single-row battery cells 2. The elastic support assembly 3 includes a support plate 31, and a plurality of spring assemblies are arranged at intervals on both sides of the support plate 31. One end of the spring assembly is fixed on the support plate 31, and the other end is attached to the side wall of the single-row battery cell 2, so that the middle single-row battery cell 2 is elastically clamped between two support plates 31; the single-row battery cells 2 at both ends are elastically clamped between the support plate 31 and the module tie strap 4. The spring assembly includes a spring sleeve 32. A spring limit ring 33 is fixed to the inner wall edge at one end of the spring sleeve 32, and two mounting plates 34 are symmetrically fixed to the outer wall edge at the other end. The mounting plates 34 fix the spring sleeve 32 on the support plate 31. A spring 35 is installed in the spring sleeve 32. A support column 36 is slidably arranged in the limit ring 33. A limit step 361 that cooperates with the limit ring 33 is installed on the side wall of the support column 36. One end of the support column 36 is attached to the spring 35, and the other end is fixed with a sticker plate 37, and the sticker plate 37 is attached to the side wall of the single-row battery cell 2. A plurality of spring fixing columns 38 that cooperate with the spring 35 are fixed on the support plate 31, and the spring 35 is sleeved on the spring fixing columns 38. Threaded holes 311 are provided on the support plate 31, through holes 341 corresponding to the threaded holes 311 are provided on the mounting plates 34, and bolts 39 are provided in the through holes 341. The bolts 39 pass through the through holes 341 to fix the mounting plates 34 on the support plate 31.

[0043] The battery box body 1 is filled with hydrocarbon insulating oil. Due to the good insulation, arc extinguishing, high melting point, large specific heat capacity of the insulating oil, it can also effectively prevent moisture in the air from entering, which is more conducive to the temperature and temperature difference control of the entire battery module. The temperature of each battery cell is more balanced as a whole, and there will be no problem of large temperature difference on the same battery cell.

[0044] The following introduces the technological process during the assembly of the present utility model:

[0045] The side walls of the battery cells 21 are arranged in a side-by-side manner along the length direction to form a single-row battery cell 2. The single-row battery cells 2 and the elastic support assemblies 3 are arranged in sequence to form a battery module, which is fixed using a module tie strap 4. Structural adhesive is applied to the bottom plate of the battery box body 1, and the battery module is placed on the bottom plate of the battery box body 1 and fixed with structural adhesive. The liquid inlet 11 and the liquid outlet 12 of the battery box body 1 are connected to the cooling circulation system in the vehicle.

[0046] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An insulating oil battery box, characterized in that: The invention comprises a battery box body (1), wherein a plurality of single-row battery cells (2) are arranged at intervals in the battery box body (1), wherein the single-row battery cells (2) are formed by arranging and connecting a plurality of battery cells (21); an elastic support component (3) is arranged between adjacent single-row battery cells (2), wherein the elastic support component (3) comprises a support plate (31), wherein a plurality of spring components are arranged at intervals on both sides of the support plate (31), wherein one end of the spring component is fixed on the support plate (31), and the other end is in contact with the side wall of the single-row battery cell (2); and the battery box body (1) is filled with insulating oil.

2. The insulating oil battery box according to claim 1, characterized in that: The spring assembly comprises a spring sleeve (32), a spring (35) is arranged inside the spring sleeve (32), a spring limiting ring (33) is fixed on the inner wall edge of one end of the spring sleeve (32), and the other end is fixed on the support plate (31), and a supporting small assembly is slidably arranged inside the limiting ring (33).

3. The insulating oil battery box according to claim 2, characterized in that: The supporting subassembly comprises a supporting column (36), wherein the supporting column (36) is slidably arranged in a limiting ring (33), and a limiting step (361) cooperating with the limiting ring (33) is installed on the side wall of the supporting column (36), one end of the supporting column (36) is fitted with a spring (35), and a pasting plate (37) is fixed on the other end, and the pasting plate (37) is fitted with the side wall of the single-row battery cell (2).

4. The insulating oil battery box according to claim 2, characterized in that: A plurality of spring fixing columns (38) matched with the springs (35) are fixed on the support plate (31), and the springs (35) are sleeved on the spring fixing columns (38).

5. The insulating oil battery box according to claim 2, characterized in that: The support plate (31) is provided with a threaded hole (311), and two mounting plates (34) are symmetrically fixed to the outer wall edge of one end of the spring sleeve (32) away from the spring limiting ring (33), and the mounting plate (34) is provided with a through hole (341) corresponding to the threaded hole (311), and a bolt (39) is provided in the through hole (341), and the bolt (39) passes through the through hole (341) to fix the mounting plate (34) on the support plate (31).

6. The insulating oil battery box according to claim 1, characterized in that: A liquid inlet (11) and a liquid outlet (12) are provided on the side wall of the battery box body (1).

7. The insulating oil battery box according to claim 6, characterized in that: The liquid inlet (11) and the liquid outlet (12) are respectively arranged on two opposite side walls of the box body (1), and the height of the liquid outlet (12) is higher than that of the liquid inlet (11).

8. The insulating oil battery box according to claim 1, characterized in that: The battery core (21) is rectangular and has a pole (211) on the top. The side walls of adjacent battery cores (21) are arranged in an extended direction to form a single row of battery cores (2).

9. The insulating oil battery box according to claim 1, characterized in that: The single-row battery cells (2) and the elastic support assembly (3) form a battery module, and the outer ring of the battery module is surrounded by a module tie (4).

10. The insulating oil battery box according to claim 1, characterized in that: The bottom of the battery box body (1) is provided with structural adhesive, and the single-row battery cells (2) and the support plate (31) of the elastic support assembly (3) are fixed to the bottom plate of the battery box body (1) by means of the structural adhesive.

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