Constant-temperature battery structure

Abstract

The utility model discloses a constant-temperature battery structure which comprises a shell and a battery cell module, an inner cavity is formed in the shell, the battery cell module is arranged in the inner cavity, the constant-temperature battery structure further comprises a heating piece and an adapter plate assembly, the battery cell module, the heating piece and the adapter plate assembly are arranged in the inner cavity from top to bottom, and the upper surface of the heating piece is attached to the battery cell module; the battery cell module, the heating piece and the adapter plate assembly are electrically connected, and the adapter plate assembly is used for collecting battery cell voltage information of the battery cell module and controlling on and off of the heating piece; and a glue filling hole is formed in the shell and is communicated with the inner cavity. The heating piece can enable the battery to be in a proper temperature range, so that the service life of the battery is prolonged, and the charging and discharging performance of the battery is improved. The pouring sealant is injected into the inner cavity, can play waterproof, dustproof and insulating roles in the battery, and can also be used as a thermal resistance material to limit thermal diffusion, so that the reliability of the battery maintained in a proper temperature range is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries for electric vehicles, in particular to a constant temperature battery structure. Background Art

[0002] Lithium batteries are a type of battery commonly used in electric vehicles. The electrochemical reaction rate, energy efficiency, charge and discharge capacity, safety and life of lithium batteries are closely related to temperature. In low temperature environments, the viscosity of the electrolyte increases, and the resistance to charge transfer increases, resulting in a decrease in charging efficiency and available capacity, and may even cause overheating risks due to increased internal resistance; in high temperature environments, it will accelerate the decomposition of the electrolyte, the aging of active materials, and the occurrence of side reactions. Long-term overheating will seriously damage the life of the battery. Therefore, it is very necessary to maintain lithium batteries within an appropriate operating temperature range, and improvements need to be made. Summary of the invention

[0003] The utility model provides a new constant temperature battery structure to solve the defects in the prior art that lithium batteries cannot be maintained within a suitable temperature range, which affects the battery life and performance and even causes thermal runaway problems.

[0004] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0005] A constant temperature battery structure comprises a shell and a battery cell module, wherein an inner cavity is formed in the shell, the battery cell module is arranged in the inner cavity, and further comprises a heating element and an adapter plate assembly, wherein the battery cell module, the heating element and the adapter plate assembly are arranged in the inner cavity from top to bottom, and the upper surface of the heating element is in contact with the battery cell module; the battery cell module, the heating element and the adapter plate assembly are electrically connected, and the adapter plate assembly is used to collect battery cell voltage information of the battery cell module and control the opening and closing of the heating element; a glue injection hole is provided on the shell, and the glue injection hole is connected to the inner cavity.

[0006] The heating element helps maintain the battery within an appropriate temperature range, thereby preventing the risk of overheating caused by increased internal resistance of the battery, rapid decomposition of the electrolyte, aging of active materials and the occurrence of side reactions. It helps maintain the long-term performance of the battery, extends its service life, and improves the battery's charge and discharge performance.

[0007] The potting glue with strong thermal conductivity is injected into the inner cavity through the potting hole. On the one hand, the condensed potting glue can form a closed barrier, which is waterproof and dustproof, avoiding damage to the battery electrodes, electrolyte or electronic components, and extending the battery life; because the potting glue has good insulation properties, it can effectively isolate the direct contact between the positive and negative electrodes to prevent short circuits. On the other hand, the condensed potting glue helps to improve the heat dissipation performance of the battery. It can be used as a heat conduction medium to help evenly distribute the heat in the inner cavity, and it can also be used as a thermal resistance material to limit heat diffusion at extreme temperatures, further improving the reliability of the battery to maintain a suitable temperature range.

[0008] Preferably, the above-mentioned constant temperature battery structure further comprises a battery cell bracket, wherein the battery cell bracket is arranged outside the battery cell module, and a plurality of leakage holes are opened on the battery cell bracket, and the leakage holes are located on the upper surface of the heating element.

[0009] The cell bracket is used to clamp the cell module, thereby improving the mechanical strength and impact resistance of the cell module and protecting the cell module from external mechanical stress; the leakage hole is used to reduce the insulation area between the heating element and the cell module and increase the conduction efficiency of the heating element.

[0010] Preferably, in the above-mentioned constant temperature battery structure, the battery cell bracket is bonded to the battery cell module.

[0011] The cell holder is bonded to the outside of the cell module, which improves the convenience of installing the cell holder on the outside of the cell module. It also makes the fixed position of the cell module less likely to shift during movement, ensuring a constant distance between the cells and ensuring the reliability and consistency of the electrical connection.

[0012] Preferably, in the above-described constant temperature battery structure, the shell is provided with an isolation cabin separated from the inner cavity, and the adapter plate assembly is arranged in the isolation cabin; a charging port plug-in is provided on the upper surface of the isolation cabin, the lower end of the charging port plug-in is inserted into the isolation cabin, the upper surface of the charging port plug-in is exposed to the shell, and the output end of the charging port plug-in is electrically connected to the adapter plate assembly.

[0013] The setting of the isolation cabin isolates the battery cell module and the adapter board assembly inside the shell from each other, thereby achieving electrical isolation between the internal control terminal of the battery and the battery cell module, and improving the safety of the battery during operation; by injecting potting glue into the isolation cabin, the adapter board assembly can be sealed and fixed in the isolation cabin, thereby improving the stability of the installation of the adapter board assembly.

[0014] Preferably, in the above-mentioned constant temperature battery structure, the adapter plate assembly includes an adapter circuit board, an adapter plate bracket and a bottom cover, the adapter circuit board is provided with a battery cell voltage collection terminal, a communication interface, and a positive and negative electrode interface, the adapter plate bracket is provided with a wire groove and a plurality of plug-in slots, the wiring harness on the positive and negative electrode interfaces passes through the wire groove, and the battery cell voltage collection terminal and the communication interface pass through the plug-in slot; a screw column is provided on the inner side wall of the isolation cabin, a threaded hole is provided on the adapter plate bracket, and the adapter plate bracket is detachably arranged in the isolation cabin through the screw column, the threaded hole and the fasteners; a fixing column is provided on the adapter plate bracket, a fixing hole is provided on the bottom cover, and the bottom cover is detachably arranged on the adapter plate bracket through the fixing hole, the fixing column and the fasteners, and the bottom cover covers the opening of the isolation cabin.

[0015] The adapter circuit board collects the voltage information of the battery cell module through the battery cell voltage collection terminal, and communicates wirelessly with the electric vehicle controller through the communication interface, thereby improving the accuracy of controlling the opening and closing of the heating element; the battery cell voltage collection terminal and the communication interface are limited through the plug-in slot, and the wiring harness at the positive and negative electrode interfaces is limited through the wire groove; the adapter board bracket and the bottom cover are distributed from top to bottom and are tightened and fixed with screws, which improves the convenience of installing the adapter board assembly.

[0016] Preferably, in the above-mentioned constant temperature battery structure, the shell is provided with an exhaust hole, and the exhaust hole is connected to the inner cavity.

[0017] When the glue is poured into the inner cavity, the air in the inner cavity can be discharged outward through the exhaust hole, so that the potting glue can be evenly distributed in the shell.

[0018] Preferably, in the above-mentioned constant temperature battery structure, a handle is provided on the shell, an induction groove is opened on the shell, the handle is arranged in the induction groove, and the handle is made of rubber material.

[0019] The setting of the handle facilitates the extraction of batteries, and the setting of the induction groove provides storage space for the handle, improves the flatness of the outer surface of the shell, and facilitates the placement of batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the battery support of the utility model;

[0022] Figure 3 This is a cross-sectional view of the isolation cabin embodied in the utility model;

[0023] Figure 4 It is a structural schematic diagram of the adapter plate assembly of the utility model. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-4 The present invention is further described in detail with the following specific embodiments, but they are not intended to limit the present invention:

[0025] Example 1

[0026] like Figure 1-Figure 4 As shown, a constant temperature battery structure includes a shell 1 and a battery cell module 2, an inner cavity 3 is formed in the shell 1, the battery cell module 2 is arranged in the inner cavity 3, and also includes a heating element 4 and an adapter plate assembly 5, the battery cell module 2, the heating element 4 and the adapter plate assembly 5 are arranged in the inner cavity 3 from top to bottom, and the upper surface of the heating element 4 is in contact with the battery cell module 2; the battery cell module 2, the heating element 4 and the adapter plate assembly 5 are electrically connected, and the adapter plate assembly 5 is used to collect the battery cell voltage information of the battery cell module 2 and control the opening and closing of the heating element 4; a glue injection hole 11 is opened on the shell 1, and the glue injection hole 11 is connected to the inner cavity 3.

[0027] Preferably, a cell support 6 is further included, and the cell support 6 is arranged outside the cell module 2 . A plurality of leakage holes 61 are opened on the cell support 6 , and the leakage holes 61 are located on the upper surface of the heating element 4 .

[0028] Preferably, the battery cell bracket 6 is bonded to the battery cell module 2 .

[0029] Preferably, the shell 1 is provided with an isolation cabin 12 separated from the inner cavity 3, and the adapter plate assembly 5 is arranged in the isolation cabin 12; the upper surface of the isolation cabin 12 is provided with a charging port plug-in 7, the lower end of the charging port plug-in 7 is inserted into the isolation cabin 12, the upper surface of the charging port plug-in 7 is exposed to the shell 1, and the output end of the charging port plug-in 7 is electrically connected to the adapter plate assembly 5.

[0030] Preferably, the adapter board assembly 5 includes an adapter circuit board 51, an adapter board bracket 52 and a bottom cover 53. The adapter circuit board 51 is provided with a battery cell voltage collection terminal 511, a communication interface 512, and a positive and negative electrode interface 513. The adapter board bracket 52 is provided with a wire groove 521 and a plurality of plug-in slots 522. The wire harness on the positive and negative electrode interface 513 passes through the wire groove 521, and the battery cell voltage collection terminal 511 and the communication interface 512 pass through the plug-in slot 522. The inner wall of the isolation cabin 12 A screw column 121 is provided, and a threaded hole 523 is opened on the adapter plate bracket 52. The adapter plate bracket 52 is detachably arranged in the isolation cabin 12 through the screw column 121, the threaded hole 523 and the fasteners; a fixing column 524 is provided on the adapter plate bracket 52, and a fixing hole 531 is opened on the bottom cover 53. The bottom cover 53 is detachably arranged on the adapter plate bracket 52 through the fixing hole 531, the fixing column 524 and the fasteners, and the bottom cover 53 covers the opening of the isolation cabin 12.

[0031] Preferably, an exhaust hole 13 is provided on the shell 1 , and the exhaust hole 13 is communicated with the inner cavity 3 .

[0032] Preferably, a handle 8 is provided on the shell 1 , an induction groove 14 is opened on the shell 1 , the handle 8 is arranged in the induction groove 14 , and the handle 8 is made of rubber material.

[0033] Specifically, the battery module 2 includes a battery and a battery protection circuit board, and the heating element 4 adopts an etched heating sheet, and the circuit on the etched heating sheet is a continuously customized shape, so as to achieve uniform heat distribution. The upper surface of the heating element 4 is coated with adhesive and is closely attached to the bottom of the battery bracket 6. The heating element 4 is provided with a positive electrode connection and a negative electrode connection, and the positive electrode connection and the negative electrode connection of the heating element 4 are electrically connected to the battery protection circuit board.

[0034] The adapter board assembly 5 collects the cell voltage information through the cell voltage collection terminal 511, and communicates with the electric vehicle controller through the communication interface 512, so that it can control the opening and closing of the heating element 4 in combination with the cell module 2 and the surrounding environment, making it convenient to maintain the cell module 2 within a suitable temperature range.

[0035] like Figure 1 , Figure 3 As shown, a potting glue with strong thermal conductivity is injected into the inner cavity 3 through the potting hole 11, and the air in the inner cavity 3 is discharged through the exhaust hole 13, so that the potting glue can be evenly wrapped around the outside of the battery module 2, the heating element 4 and other electronic components, so that the heat provided by the heating element 4 can be conducted to various places in the inner cavity 3 through the potting glue, thereby improving the balance of heat inside the battery.

[0036] like Figure 3 , Figure 4As shown, the charging port plug-in 7 is detachably installed on the isolation cabin 12 by means of screws, and the outlet end of the charging port plug-in 7 is electrically connected to the adapter circuit board 51. When installing the adapter board assembly 5 on the isolation cabin 12, first place the adapter circuit board 51 on the adapter board bracket 52 and allow the battery cell voltage collection end 511 and the communication interface 512 to pass through the plug-in slot 522, then align the threaded hole 523 with the screw column 121, then pass the screw through the threaded hole 523 and tighten it in the screw column 121, so that the adapter circuit board 51 can be fixed in the isolation cabin 12, and then cover the bottom cover 53 on the lower surface of the adapter board bracket 52 so that the fixing hole 531 is aligned with the fixing column 524, and then pass the screw through the fixing hole 531 and tighten it in the fixing column 524, and then complete the installation and fixation of the adapter board assembly 5.

[0037] More specifically, Figure 1 As shown, the handle 8 includes a body and a reinforced rubber sheet, and the reinforced rubber sheet is integrally formed on the upper surface of the body. A plug-in column and a first clamping block are integrally formed on the inner side walls at both ends of the induction groove 14. The plug-in column is distributed along the length direction of the shell 1, and the first clamping block is distributed along the height direction of the shell 1. The first clamping block is distributed below the plug-in column.

[0038] The body is provided with a limit block, and a limit hole is provided on the limit block. The plug-in column passes through the limit hole and is plugged in and matched, so as to achieve the limit fixation of the horizontal direction of the handle 8. Locking plates are fixedly installed at both ends of the handle 8, and a second clamping block is integrally formed on the locking plate. The first clamping block and the second clamping block are clamped and matched to achieve the limit of the height direction of the handle 8, so as to achieve the installation and fixation of the handle 8.

[0039] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application for the present invention should fall within the scope of the present invention.

Claims

1. A constant temperature battery structure, comprising a housing (1) and a battery cell module (2), wherein an inner cavity (3) is formed in the housing (1), and the battery cell module (2) is arranged in the inner cavity (3), characterized in that: The invention also comprises a heating element (4) and an adapter plate assembly (5), wherein the battery cell module (2), the heating element (4) and the adapter plate assembly (5) are arranged in the inner cavity (3) from top to bottom, and the upper surface of the heating element (4) is in contact with the battery cell module (2); the battery cell module (2), the heating element (4) and the adapter plate assembly (5) are electrically connected, and the adapter plate assembly (5) is used to collect battery cell voltage information of the battery cell module (2) and control the opening and closing of the heating element (4); and the shell (1) is provided with a glue injection hole (11), and the glue injection hole (11) is connected with the inner cavity (3).

2. A constant temperature battery structure according to claim 1, characterized in that: It also comprises a cell support (6), the cell support (6) being arranged outside the cell module (2), the cell support (6) being provided with a plurality of leakage holes (61), the leakage holes (61) being located on the upper surface of the heating element (4).

3. A constant temperature battery structure according to claim 2, characterized in that: The battery cell support (6) is bonded to the battery cell module (2).

4. A constant temperature battery structure according to claim 1, characterized in that: The shell (1) is provided with an isolation cabin (12) separated from the inner cavity (3), and the adapter plate assembly (5) is arranged in the isolation cabin (12); the upper surface of the isolation cabin (12) is provided with a charging port plug-in (7), the lower end of the charging port plug-in (7) is inserted into the isolation cabin (12), the upper surface of the charging port plug-in (7) is exposed to the shell (1), and the outlet end of the charging port plug-in (7) is electrically connected to the adapter plate assembly (5).

5. A constant temperature battery structure according to claim 4, characterized in that: The adapter board assembly (5) comprises an adapter circuit board (51), an adapter board bracket (52) and a bottom cover (53); the adapter circuit board (51) is provided with a battery cell voltage collection terminal (511), a communication interface (512) and a positive and negative electrode interface (513); the adapter board bracket (52) is provided with a wire groove (521) and a plurality of plug-in slots (522); the wire harness on the positive and negative electrode interface (513) passes through the wire groove (521), and the battery cell voltage collection terminal (511) and the communication interface (512) pass through the plug-in slots (522); the inner side wall of the isolation cabin (12) is provided with The adapter plate bracket (52) is provided with a screw column (121), a threaded hole (523) is provided on the adapter plate bracket (52), and the adapter plate bracket (52) is detachably arranged in the isolation cabin (12) through the screw column (121), the threaded hole (523) and the fasteners; the adapter plate bracket (52) is provided with a fixing column (524), and the bottom cover (53) is provided with a fixing hole (531), and the bottom cover (53) is detachably arranged on the adapter plate bracket (52) through the fixing hole (531), the fixing column (524) and the fasteners, and the bottom cover (53) covers the opening of the isolation cabin (12).

6. A constant temperature battery structure according to claim 1, characterized in that: The shell (1) is provided with an exhaust hole (13), and the exhaust hole (13) is communicated with the inner cavity (3).

7. A constant temperature battery structure according to claim 1, characterized in that: The shell (1) is provided with a handle (8), the shell (1) is provided with an induction groove (14), the handle (8) is arranged in the induction groove (14), and the handle (8) is made of rubber material.

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