Lithium battery constant temperature structure

Abstract

The utility model discloses a lithium battery constant temperature structure which comprises a lithium battery main body, the lithium battery main body comprises a battery shell, a battery cell assembly and a heating assembly, an installation space is formed in the middle of the battery shell, the battery cell assembly and the heating assembly are both arranged in the installation space, and the battery cell assembly comprises a battery cell, at least two battery cell protection shells and a temperature sensor. The battery cell is wrapped by the battery cell protection shell, the temperature sensor is arranged at the upper end of the battery cell, the heating assembly comprises a heating plate, a reflecting film and a polystyrene board from top to bottom, the heating assembly is arranged at the lower end of the battery cell assembly, and the heating plate of the heating assembly is electrically connected with the temperature sensor of the battery cell assembly. When the temperature of the battery cell assembly is too low, the heating assembly can heat the battery cell assembly, so that the temperature of the battery cell assembly returns to the optimal temperature, the charging and discharging efficiency of the lithium battery can be improved, and the service life of the lithium battery is prolonged.

Description

Technical Field

[0001] The utility model relates to a lithium battery, in particular to a lithium battery constant temperature structure. Background Art

[0002] As electric two-wheelers become more and more popular, vehicle endurance has become an important criterion for consumers to consider. The best operating temperature for lithium batteries is 20-25°C. Within this temperature range, the charging and discharging efficiency of lithium batteries is the highest, while also ensuring the safety and life of lithium batteries. If the charging temperature is too low, the charging and discharging efficiency of lithium batteries will decrease, thereby affecting the life of lithium batteries, so improvements are needed. Summary of the invention

[0003] The utility model aims at the defects in the prior art that the lithium battery cannot be kept in a constant temperature state, thus affecting the service life of the battery during use, and provides a new constant temperature structure for the lithium battery.

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

[0005] A lithium battery constant temperature structure comprises a lithium battery body, wherein the lithium battery body comprises a battery shell, a battery cell assembly and a heating assembly, an installation space is opened in the middle of the battery shell, the battery cell assembly and the heating assembly are both arranged in the installation space, the battery cell assembly comprises a battery cell, at least two battery cell protective shells and a temperature sensor, the battery cell is wrapped in the battery cell protective shell, the temperature sensor is arranged at the upper end of the battery cell, the heating assembly comprises a heating plate, a reflective film and a benzene plate from top to bottom, the heating assembly is arranged at the lower end of the battery cell assembly, and the heating plate of the heating assembly is electrically connected to the temperature sensor of the battery cell assembly.

[0006] When the temperature of the battery cell assembly is too low, the heating assembly can heat the battery cell assembly to return the temperature of the battery cell assembly to an optimal temperature, thereby improving the charging and discharging efficiency of the lithium battery and extending the service life of the lithium battery.

[0007] Preferably, the above-mentioned lithium battery constant temperature structure also includes a fixing component, which includes two first clamps and two second clamps, the first clamps are respectively arranged on the left and right sides of the battery cell protective shell, and the second clamps are respectively arranged on the front and back sides of the battery cell protective shell, and the first clamp is detachably connected to the adjacent second clamp.

[0008] The setting of the fixing component can effectively improve the stability of the battery cell protective shell during installation and fixing.

[0009] Preferably, in the above-mentioned constant temperature structure of a lithium battery, a fixing groove is provided on the outer wall of the battery cell protective shell near the position of the first clamp, and a fixing ear is provided on the first clamp, and the first clamp is fixed in the fixing groove by the fixing ear, and the two sides of the second clamp are covered on the fixing ear and fixed by bolts.

[0010] After the first clamp is fixed in the fixing groove by the fixing ear, the second clamp covers the first clamp and is fixed by bolts, thereby effectively improving the stability of the first clamp and the second clamp when being fixed.

[0011] Preferably, in the above-mentioned constant temperature structure of a lithium battery, at least three heat dissipation grooves are further provided on the outer wall of the battery cell protective shell, and heat dissipation holes are provided at positions corresponding to the second clamp and the heat dissipation grooves.

[0012] Through the dual cooperation of the heat dissipation groove and the heat dissipation hole, the effect of internal circulation can be achieved inside the lithium battery.

[0013] Preferably, in the above-mentioned constant temperature structure for lithium batteries, a wire clamping groove is further provided on the outer side wall of the battery cell protective shell.

[0014] The setting of the wire slot can limit the wiring harness inside the lithium battery and reduce the difficulty of installing the wiring harness.

[0015] Preferably, in the above-mentioned constant temperature structure of a lithium battery, the battery shell comprises an upper shell and a lower shell, an upper cover matching groove is provided on the lower shell, and the upper shell of the shell is matched and connected with the upper cover matching groove.

[0016] On the one hand, the upper shell and the lower shell of the outer shell are matched and connected through the matching groove of the upper cover, and on the other hand, sealant is pre-coated in the groove. After the upper shell and the lower shell of the outer shell are connected, the sealant can effectively isolate the entry of impurities such as water and dust.

[0017] Preferably, in the above-mentioned constant temperature structure of a lithium battery, both the upper shell and the lower shell of the outer shell are provided with glue filling chambers along the circumferential direction, and the glue filling chambers are interconnected, and the upper end of the upper shell of the outer shell is provided with a glue filling hole.

[0018] The setting of the glue filling cabin can, on the one hand, form a sealed space between the upper shell and the lower shell of the outer shell after glue filling. On the other hand, since various wiring harness connectors are arranged in the glue filling cabin, impurities such as water and dust can be isolated from entering after glue filling, so as to improve the service life of the lithium battery.

[0019] Preferably, in the above-mentioned constant temperature structure of a lithium battery, a limiting column is provided at the upper end of the battery cell protective shell, and a limiting hole is provided on the inner surface of the upper shell of the outer shell, and the limiting column and the limiting hole cooperate with each other to limit.

[0020] The cooperation between the limiting column and the limiting hole can effectively prevent the battery cell from being displaced during assembly, thereby ensuring that the battery cell is fixed in the middle position.

[0021] Preferably, in the above-mentioned constant temperature structure for a lithium battery, a charging port is provided on the lower shell of the outer shell.

[0022] The charging port is used to connect the power cord to achieve the purpose of charging and discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The explosion structure of the lithium battery main body of the utility model is shown in FIG. Figure 1 ;

[0024] Figure 2 The explosion structure of the lithium battery main body of the utility model is shown in FIG. Figure 2 ;

[0025] Figure 3 It is a schematic diagram of the longitudinal section structure of heat conduction inside the main body of the lithium battery of the utility model;

[0026] Figure 4 It is a schematic diagram of the structure of the upper shell of the housing of the utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the battery protection shell of the utility model;

[0028] Figure 6 It is a structural schematic diagram of the fixing component of the utility model. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-6 The present invention is further described in detail with the following specific embodiments, but they are not intended to limit the present invention:

[0030] Example 1

[0031] like Figure 1-Figure 6As shown, a lithium battery constant temperature structure includes a lithium battery body 1, the lithium battery body 1 includes a battery shell 11, a battery cell assembly 12 and a heating assembly 13, an installation space 111 is opened in the middle of the battery shell 11, the battery cell assembly 12 and the heating assembly 13 are both arranged in the installation space 111, the battery cell assembly 12 includes a battery cell 121, at least two battery cell protective shells 122 and a temperature sensor 123, the battery cell 121 is wrapped in the battery cell protective shell 122, the temperature sensor 123 is arranged at the upper end of the battery cell 121, the heating assembly 13 includes a heating plate 131, a reflective film 132 and a benzene plate 133 from top to bottom, the heating assembly 13 is arranged at the lower end of the battery cell assembly 12, and the heating plate 131 of the heating assembly 13 is electrically connected to the temperature sensor 123 of the battery cell assembly 12.

[0032] Specifically, the heating plate 131 of the present invention is a graphene heating plate, and the heating plate 131 is used to generate heat;

[0033] Since the heating plate 131 is placed at the bottom of the battery cell 121, only the heat on one side of the heating plate 131 can be conducted to the battery cell 121, and the reflective film 132 can reflect the heat on the other side of the heating plate 131 to the battery cell 121, thereby improving the utilization efficiency of heat;

[0034] The polystyrene board 133 mainly plays a role of heat preservation and can effectively prevent heat from being lost from the bottom;

[0035] The temperature monitored by the temperature sensor 123 is 20 degrees to 25 degrees, and because the temperature sensor 123 is arranged at the upper end of the battery cell 121, and the heat is conducted upward, the temperature sensor 123 can monitor the temperature more accurately.

[0036] Preferably, a fixing component 2 is further included, and the fixing component 2 includes two first clamps 21 and two second clamps 22, the first clamps 21 are respectively arranged on the left and right sides of the battery cell protective shell 122, and the second clamps 22 are respectively arranged on the front and back sides of the battery cell protective shell 122, and the first clamps 21 are detachably connected to the adjacent second clamps 22.

[0037] Preferably, a fixing groove 1221 is provided on the outer wall of the battery cell protection shell 122 near the first clamp 21, and a fixing ear 211 is provided on the first clamp 21. The first clamp 21 is fixed in the fixing groove 1221 through the fixing ear 211, and the two sides of the second clamp 22 are covered on the fixing ear 211 and fixed by bolts.

[0038] Preferably, at least three heat dissipation slots 1222 are further provided on the outer side wall of the battery cell protection shell 122 , and heat dissipation holes 221 are provided at positions corresponding to the heat dissipation slots 1222 of the second clamp 22 .

[0039] Preferably, a wire clamping groove 1223 is further provided on the outer side wall of the battery cell protection shell 122 .

[0040] Preferably, the battery housing 11 comprises an upper housing shell 112 and a lower housing shell 113 , an upper cover matching groove 1131 is formed on the lower housing shell 113 , and the upper housing shell 112 and the upper cover matching groove 1131 are matched and connected with each other.

[0041] Preferably, both the upper shell 112 and the lower shell 113 of the outer shell are provided with glue pouring chambers 3 along the circumferential direction, and the glue pouring chambers 3 are interconnected, and a glue pouring hole 1121 is provided at the upper end of the upper shell 112 of the outer shell.

[0042] Specifically, the glue in the glue filling chamber 3 is a polyurethane two-component thermally conductive glue, which can improve the heat conduction efficiency after solidification, thereby better conducting the heat generated by the heating plate 131 to the battery cell 121 .

[0043] Preferably, a limiting column 1224 is provided at the upper end of the battery protection shell 122, and a limiting hole 1122 is provided on the inner surface of the outer shell upper shell 112, and the limiting column 1224 and the limiting hole 1122 cooperate with each other to limit.

[0044] Preferably, a charging port 1133 is provided on the lower shell 113 of the outer shell.

[0045] Specifically, when the temperature sensor 123 detects that the temperature inside the lithium battery body 1 is lower than the minimum temperature of 20 degrees during use, the heating plate 131 of the heating component 13 will be started, and then the battery cell 121 of the battery cell assembly 12 can be heated, so that the temperature of the lithium battery body 1 returns to the most suitable operating temperature. When the internal temperature of the lithium battery body 1 exceeds the maximum temperature of 25 degrees, the heating plate 131 of the heating component 13 will stop working.

[0046] 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 lithium battery constant temperature structure, comprising a lithium battery body (1), wherein the lithium battery body (1) comprises a battery housing (11), a battery cell assembly (12) and a heating assembly (13), wherein an installation space (111) is provided in the middle of the battery housing (11), and the battery cell assembly (12) and the heating assembly (13) are both arranged in the installation space (111), characterized in that: The battery cell assembly (12) comprises a battery cell (121), at least two battery cell protection shells (122) and a temperature sensor (123); the battery cell (121) is wrapped in the battery cell protection shell (122); the temperature sensor (123) is arranged at the upper end of the battery cell (121); the heating assembly (13) comprises a heating plate (131), a reflective film (132) and a benzene plate (133) from top to bottom; the heating assembly (13) is arranged at the lower end of the battery cell assembly (12); and the heating plate (131) of the heating assembly (13) is electrically connected to the temperature sensor (123) of the battery cell assembly (12).

2. A lithium battery constant temperature structure according to claim 1, characterized in that: The invention also comprises a fixing assembly (2), wherein the fixing assembly (2) comprises two first clamps (21) and two second clamps (22), wherein the first clamps (21) are respectively arranged on the left and right sides of the battery cell protection shell (122), and the second clamps (22) are respectively arranged on the front and rear sides of the battery cell protection shell (122), and the first clamps (21) are detachably connected to the adjacent second clamps (22).

3. A lithium battery constant temperature structure according to claim 2, characterized in that: A fixing groove (1221) is provided on the outer wall of the battery cell protection shell (122) near the first clamp (21); a fixing ear (211) is provided on the first clamp (21); the first clamp (21) is fixed in the fixing groove (1221) via the fixing ear (211); and two sides of the second clamp (22) are covered on the fixing ear (211) and fixed via bolts.

4. A lithium battery constant temperature structure according to claim 2, characterized in that: At least three heat dissipation slots (1222) are also provided on the outer side wall of the battery cell protection shell (122), and heat dissipation holes (221) are provided at positions corresponding to the heat dissipation slots (1222) of the second clamp (22).

5. A lithium battery constant temperature structure according to claim 1, characterized in that: A wire clamping groove (1223) is also provided on the outer side wall of the battery cell protection shell (122).

6. A lithium battery constant temperature structure according to claim 1, characterized in that: The battery housing (11) comprises an upper housing shell (112) and a lower housing shell (113); an upper cover matching groove (1131) is provided on the lower housing shell (113); and the upper housing shell (112) and the upper cover matching groove (1131) are matched and connected with each other.

7. A lithium battery constant temperature structure according to claim 6, characterized in that: The upper shell (112) and the lower shell (113) of the outer shell are both provided with glue injection chambers (3) along the circumferential direction, and the glue injection chambers (3) are interconnected. The upper end of the upper shell (112) of the outer shell is provided with a glue injection hole (1121).

8. A lithium battery constant temperature structure according to claim 6, characterized in that: A limiting column (1224) is provided at the upper end of the battery cell protection shell (122), a limiting hole (1122) is provided on the inner surface of the outer shell upper shell (112), and the limiting column (1224) and the limiting hole (1122) cooperate with each other for limiting.

9. A lithium battery constant temperature structure according to claim 6, characterized in that: The lower shell (113) of the housing is provided with a charging port (1133).

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