Battery structure

Abstract

The utility model provides a battery structure which comprises a battery cell module, a heating structure arranged at the top of the battery cell module and a cooling structure arranged at the bottom of the battery cell module, and an upper NTC (Negative Temperature Coefficient) and a lower NTC are respectively arranged at two opposite ends of the battery cell module. According to the battery structure disclosed by the utility model, a double-layer NTC (Negative Temperature Coefficient) scheme is adopted to monitor a full-temperature-range thermal management system aiming at a thermal management scheme of different cooling and heating sides, and the double-layer NTC performs own functions under different working conditions, monitors the highest temperature and the lowest temperature of the battery cell in real time, and supports reasonable use of the battery cell in a current temperature interval.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium ion power battery thermal management technical field especially relates to a battery structure. BACKGROUND

[0002] The existing NTC gathers mostly to adopt the same layer design, and gathers the same layer temperature under all working conditions to represent the battery cell working state. However, for the scheme that heating and cooling are not on the same side, if according to the same layer conventional NTC scheme design, only single working condition of heating or cooling can be met. That is, NTC design is close to the cold plate side, although the lowest temperature of the heating process can be monitored, but the highest temperature of the cooling process cannot be monitored, and there is a safety risk. If NTC design is on the heating plate side, although the highest temperature in the cooling process can be monitored, the safety risk is reduced, but the lowest temperature of the system in the heating process cannot be monitored, and the battery cell has the risk of lithium precipitation under high rate charging at low temperature. SUMMARY

[0003] The utility model discloses a battery structure to solve the shortcoming of prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A battery structure, comprising a battery cell module, a heating structure arranged on the top of the battery cell module and a cooling structure arranged on the bottom of the battery cell module, and upper and lower NTCs arranged on opposite ends of the battery cell module.

[0006] Further, one end of the battery cell module is provided with a first end plate, a first foam structure is arranged between the first end plate and the lower NTC, and the lower NTC is connected with the first foam structure.

[0007] Further, the first foam structure comprises a first gap foam and a first heat preservation foam, a lower NTC mounting gap is formed in the first gap foam, the lower NTC is fixedly connected with the first foam structure through the lower NTC mounting gap, and the first heat preservation foam and the first gap foam are connected on the side portion away from the lower NTC.

[0008] Further, the other end of the battery cell module away from the first end plate is provided with a second end plate, a second foam structure is arranged between the second end plate and the upper NTC, and the upper NTC is connected with the second foam structure.

[0009] Further, the second foam structure includes a second gap foam and a second thermal insulation foam, an upper layer NTC mounting gap is formed on the second gap foam, and the upper layer NTC is fixedly connected with the second foam structure through the upper layer NTC mounting gap.

[0010] Compared with the prior art, the battery structure has the advantages and positive effects that,

[0011] The battery structure in the utility model, to the thermal management scheme of cooling and heating on the opposite side, adopts double-layer NTC scheme to monitor the full-temperature-range thermal management system, the double-layer NTC plays its own role under different working conditions, and also monitors the maximum temperature and minimum temperature of the battery cell in real time, and supports the reasonable use of the battery cell in the current temperature range. The battery structure in the utility model, under high-temperature working conditions, the NTC arranged away from the cold plate side monitors the maximum temperature of the battery system, reduces the thermal safety risk of high-temperature charge-discharge overtemperature of the battery cell, under low-temperature working conditions, the NTC arranged away from the heating plate side monitors the minimum temperature of the battery system, reduces the safety risk of lithium precipitation of the battery cell under low-temperature large-current charging, can meet the demand of monitoring the minimum temperature of the battery cell under low-temperature conditions and monitoring the maximum temperature under high-temperature working conditions, the double-layer NTC can monitor the maximum temperature and minimum temperature of the system in real time under full-temperature-range and full-working-condition in the thermal management scheme of cooling and heating on the opposite side, and the battery cell is safer to use. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a perspective structural schematic view of the battery structure of the utility model from one angle of view;

[0013] Figure 2 It is a perspective structural schematic view of the battery structure of the utility model from another angle of view; Figure 1

[0014] Figure 3 It is a structural schematic view of the first foam structure of the battery structure of the utility model; Figure 1

[0015] Figure 4 It is a structural schematic view of the first gap foam of the battery structure of the utility model; and Figure 1

[0016] Figure 5 It is a structural schematic view of the second gap foam of the battery structure of the utility model. Figure 1

[0017] ​​​​Legend: 1, heating structure; 2, cooling structure; 3, first end plate; 4, first foam structure; 5, lower NTC; 6, second foam structure; 7, upper NTC; 8, second end plate; 41, first notched foam; 42, first heat preservation foam; 411, lower NTC mounting notch; 61, second notched foam; 611, upper NTC mounting notch. DETAILED DESCRIPTION

[0018] Please refer to Figures 1-5 The utility model provides a battery structure, including electric core module, heating structure 1 of being located electric core module top and cooling structure 2 of being located electric core module bottom, opposite two ends of electric core module are equipped with upper NTC 7 and lower NTC 5 respectively.

[0019] In one embodiment, one end of the electric core module is provided with a first end plate 3, a first foam structure 4 is provided between the first end plate and the lower NTC, and the lower NTC is connected with the first foam structure.

[0020] In one embodiment, the first foam structure includes a first notched foam 41 and a first heat preservation foam 42, a lower NTC mounting notch 411 is formed on the first notched foam, the lower NTC is fixedly connected with the first foam structure through the lower NTC mounting notch, and the first heat preservation foam is connected with the side of the first notched foam away from the lower NTC.

[0021] In one embodiment, the electric core module is provided with a second end plate 8 at an end away from the first end plate, a second foam structure 6 is provided between the second end plate and the upper NTC, and the upper NTC is connected with the second foam structure.

[0022] In one embodiment, the second foam structure includes a second notched foam 61 and a second heat preservation foam, an upper NTC mounting notch 611 is formed on the second notched foam, the upper NTC is fixedly connected with the second foam structure through the upper NTC mounting notch, and the second heat preservation foam is connected with the side of the second notched foam away from the upper NTC.

[0023] The utility model discloses a battery structure, for the cooling and heating opposite side heat management scheme, through bottom cooling, top heating, the lower layer NTC is the collection electric core downside temperature, and the buffer bubble cotton is opened long gap, and the NTC is inserted from top to bottom and is installed on the first bubble cotton structure, the lower layer NTC is located at the first end plate, and the lower layer NTC gap bubble cotton is designed as the composite structure of heat preservation bubble cotton + gap bubble cotton, and local heat preservation is increased.

[0024] The battery structure in the utility model, for the cooling and heating opposite side heat management scheme, adopts double -layer NTC scheme monitoring full temperature domain heat management system, and double -layer NTC is in different working conditions and each is responsible for its job, and the highest temperature, the lowest temperature of electric core is monitored in real time, and the electric core is supported in the current temperature interval and is used reasonably. The battery structure in the utility model, under high temperature working condition, the NTC monitoring battery system highest temperature is arranged at the side far from the cold plate, reduces the heat safety risk of electric core high temperature charge-discharge overtemperature, under low temperature working condition, the NTC monitoring battery system lowest temperature is arranged at the side far from the heating plate, reduces the safety risk of electric core low temperature large current charging lithium, can meet the demand of monitoring the lowest temperature of electric core under low temperature condition of battery system, the highest temperature under high temperature working condition, and double -layer NTC can monitor the highest temperature, the lowest temperature of system in real time under the whole temperature, under the whole working condition in the cooling and heating opposite side heat management scheme, and the electric core is safer.

[0025] The above is only the preferred embodiment of the utility model, and does not limit other forms of the utility model, and any skilled person in the art can change or modify the equivalent embodiment of equivalent change by using the disclosed technical content, and apply to other fields, but any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model, still belongs to the protection scope of the utility model technical scheme, and in the description of the utility model, it is necessary to explain that, unless there is explicit provision and limitation, the terms "installation", "connection", "connection" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected or indirectly connected through an intermediate medium, and can be the communication of two elements. For ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

Claims

1. A battery structure, characterized by: The battery cell module, the heating structure arranged on the top of the battery cell module and the cooling structure arranged on the bottom of the battery cell module, opposite ends of the battery cell module are respectively provided with an upper NTC and a lower NTC.

2. The battery structure of claim 1, wherein: One end of the battery cell module is provided with a first end plate, a first foam structure is arranged between the first end plate and the lower NTC, and the lower NTC is connected with the first foam structure.

3. The battery structure of claim 2, wherein: The first foam structure comprises a first gap foam and a first heat preservation foam, a lower NTC mounting gap is formed in the first gap foam, the lower NTC is fixedly connected with the first foam structure through the lower NTC mounting gap, and the first heat preservation foam and the side of the first gap foam away from the lower NTC are connected.

4. The battery structure of claim 3, wherein: One end of the battery cell module away from the first end plate is provided with a second end plate, a second foam structure is arranged between the second end plate and the upper NTC, and the upper NTC is connected with the second foam structure.

5. The battery structure of claim 4, wherein: The second foam structure comprises a second gap foam and a second heat preservation foam, an upper NTC mounting gap is formed in the second gap foam, the upper NTC is fixedly connected with the second foam structure through the upper NTC mounting gap, and the second heat preservation foam and the side of the second gap foam away from the upper NTC are connected.

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