Battery pack structure

Abstract

The utility model provides a battery pack structure and belongs to the field of new energy batteries. The structure comprises a box body, a battery module and heating films, the box body is of a rectangular structure, the battery module and the heating films are arranged in the box body, the battery module comprises a plurality of battery cells, the battery cells are arranged side by side in the length direction of the box body, the heating films are arranged at the two ends of the battery module in the length direction, and each heating film comprises two interlayers and a plurality of heating units. And the plurality of heating units are clamped between the two interlayers. By adopting the battery pack structure provided by the embodiment of the utility model, the problem of poor temperature uniformity in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery field, especially a battery package structure. BACKGROUND

[0002] With the gradual development of new energy vehicles, new energy batteries are widely used in various environments, when the battery package is in a low temperature environment, the temperature of the battery core at the center of the battery package is relatively high due to its self-heating and the heating of the surrounding battery core, while the temperature of the battery at the edge is relatively low due to the contact with the box and the cross beam, which leads to poor consistency of all battery cores.

[0003] The battery package in the prior art usually places foam or PC sheet with small thermal conductivity between the battery core near the cross beam and the cross beam to slow down the heat transfer of the battery core to the environment, but in low temperature heating working condition or heat preservation working condition, the temperature of the battery core at the edge is still low and the temperature of the battery core at the center is high, which leads to large temperature difference between the battery cores and damages the battery core.

[0004] The battery package in the prior art still has the problem of low temperature of the battery core at both ends and high temperature of the battery core at the middle part when heat preservation is carried out in a low temperature environment, which leads to poor heat preservation performance and poor uniformity of the battery core, and the battery core is easily damaged. UTILITY MODEL CONTENT

[0005] The utility model embodiment provides a battery package structure, can solve the problem of poor uniformity in prior art, the technical scheme is as follows:

[0006] A battery package structure, comprising: a box, a battery module and a heating film,

[0007] The box is a rectangular structure, the battery module and the heating film are arranged in the box, the battery module comprises a plurality of battery cores, the battery cores are arranged side by side along the length direction of the box, the heating film is arranged at both ends of the length direction of the battery module, the heating film comprises two interlayers and a plurality of heating units, and the plurality of heating units are clamped between the two interlayers.

[0008] Optionally, the plurality of heating units are connected in series.

[0009] Optionally, the plurality of heating units are connected in parallel.

[0010] Optionally, it further comprises an aluminum bar, and the plurality of battery cores are connected through the aluminum bar.

[0011] Optionally, it further comprises a cross beam, the battery module is provided with a plurality of battery modules, the plurality of battery modules are distributed in the box in a rectangular array, and the plurality of battery modules are separated through the cross beam.

[0012] Optionally, further comprising a liquid cooling plate, the liquid cooling plate is arranged at the bottom of the battery module, the liquid cooling plate is provided with a water inlet and a water outlet, the water inlet and the water outlet are arranged at one end of the box along the length direction.

[0013] Optionally, further comprising a battery energy distribution unit, the battery energy distribution unit is arranged at one end of the box close to the water inlet.

[0014] Optionally, further comprising a battery management system, the battery management system is arranged at one end of the box close to the water outlet.

[0015] The beneficial effects brought by the technical scheme provided by the embodiment of the utility model at least include:

[0016] The battery pack structure provided by the embodiment of the utility model can keep a high temperature between the battery modules and the battery cells in the width direction of the battery modules due to the self-heating of the battery cells in a low-temperature environment, and the temperature of the two ends of the battery modules in the length direction is the lowest, so that the parts with lower temperature in the battery modules can be heated by arranging the heating films at the two ends of the battery modules in the length direction, thereby reducing the temperature difference between the battery cells in the battery modules and improving the temperature uniformity between the battery cells, and the problem of poor temperature uniformity in the prior art can be effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0018] Figure 1 is the overall structure schematic view provided by the embodiment of the utility model;

[0019] Figure 2 is the top view schematic view of the cooperation of the battery module and the heating film provided by the embodiment of the utility model;

[0020] Figure 3 is the heating film structure schematic view after removing one side interlayer provided by the embodiment of the utility model;

[0021] Figure 4 is another heating film structure schematic view after removing one side interlayer provided by the embodiment of the utility model;

[0022] Figure 5 is the front view schematic view of the cooperation of the battery module and the liquid cooling plate provided by the embodiment of the utility model.

[0023] Fig. 1 - box; 2 - battery module; 21 - battery cell; 22 - aluminum bar; 3 - heating film; 31 - interlayer; 32 - heating unit; 4 - cross beam; 5 - liquid cooling plate; 51 - water inlet; 52 - water outlet; 6 - battery energy distribution unit; 7 - battery management system. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model embodiment will be described in further detail below with reference to the drawings.

[0025] Figure 1 is the overall structure schematic diagram provided by the utility model embodiment; Figure 2 is the top view schematic diagram of the cooperation of the battery module and the heating film provided by the utility model embodiment; Figure 3 is the heating film structure schematic diagram after removing one side interlayer provided by the utility model embodiment; Figure 4 is another heating film structure schematic diagram after removing one side interlayer provided by the utility model embodiment; Figure 5 is the front view schematic diagram of the cooperation of the battery module and the liquid cooling plate provided by the utility model embodiment. As shown in a kind of battery pack structure, comprising: box 1, battery module 2 and heating film 3, box 1 is rectangular structure, battery module 2 and heating film 3 are set in box 1, battery module 2 includes multiple battery cells 21, battery cell 21 is provided with multiple along the length direction of box 1 in parallel, heating film 3 is arranged at the both ends of the length direction of battery module 2, heating film 3 includes two interlayers 31 and multiple heating units 32, multiple heating units 32 are clamped between two interlayers 31. Figures 1 to 5 Exemplarily, in the utility model embodiment, battery cell 21 will generate heat energy in working state, in low temperature environment, the middle part of multiple parallelly arranged battery cells 21 is higher in temperature due to work heat production, the temperature of both ends of battery module 2 composed of battery cell 21 is lower due to contact with box 1 and loss of temperature faster, leading to its temperature, by adding heating film 3 at both ends of the length direction of battery module 2, so that heating film 3 heats the end of battery module 2, so that its temperature is kept consistent with the temperature of battery cell 21 in the central part of battery module 2 as much as possible, so that the working temperature of battery module 2 is kept consistent, thereby preventing battery cell 21 from being damaged due to excessive temperature difference.

[0026]

[0027] ​The battery pack structure provided by the embodiment of the utility model can keep high temperature between the battery module 2 and the battery cell 21 in the width direction of the battery module 2 due to the self-heating of the battery cell 21, the temperature of the two ends of the battery module 2 in the length direction is the lowest, the heating film 3 is arranged at the two ends of the battery module 2 in the length direction, the part with low temperature in the battery module 2 can be heated, the temperature difference between the battery cell 21 in the battery module 2 is reduced, the temperature uniformity between the battery cell 21 is improved, and the problem of poor temperature uniformity in the prior art can be effectively solved.

[0028] Optionally, the plurality of heating units 32 are connected in series.

[0029] Exemplarily, in the embodiment of the utility model, as shown in the figure, Figure 3 the plurality of heating units 32 are connected in series between the two interlayers 31, the heating units 32 are arranged in series, the installation of the heating units 32 can be completed through one circuit, the use of materials can be reduced as much as possible, the production cost is reduced, and the practicability of the structure is increased.

[0030] Optionally, the plurality of heating units 32 are connected in parallel.

[0031] Exemplarily, in the embodiment of the utility model, as shown in the figure, Figure 4 the plurality of heating units 32 are connected in parallel between the two interlayers 31, each heating unit 32 can work independently, the situation that the whole heating film 3 cannot be used due to the failure of one of the heating units 32 is avoided, and the faulty heating unit 32 can be replaced during maintenance, so that the operation convenience of the structure is improved.

[0032] Optionally, the utility model further includes an aluminum bar 22, and the plurality of battery cells 21 are connected through the aluminum bar 22.

[0033] Exemplarily, in the embodiment of the utility model, the plurality of battery cells 21 are connected through the aluminum bar 22, the overall structure of the battery module 2 is relatively orderly, compared with directly connecting the plurality of battery cells 21 through wires, the aluminum bar 22 is not easy to cause winding interference between the wires, and the stability of the structure is ensured.

[0034] Optionally, the utility model further includes a cross beam 4, the battery module 2 is provided in plurality, the plurality of battery modules 2 are distributed in a rectangular array in the box body 1, and the plurality of battery modules 2 are separated through the cross beam 4.

[0035] Exemplarily, in the utility model embodiment, by setting multiple battery modules 2, the capacity of the battery pack structure can be improved, and the multiple battery modules 2 are separated by the cross beam 4, so that the battery modules 2 can be produced modularly, and when one of the battery modules 2 is damaged, the remaining battery modules 2 can still work, thereby further improving the stability of the structure.

[0036] Optionally, the liquid cooling plate 5 is further included, the liquid cooling plate 5 is arranged at the bottom of the battery module 2, the water inlet 51 and the water outlet 52 are arranged on the liquid cooling plate 5, and the water inlet 51 and the water outlet 52 are arranged at one end of the box body 1 along the length direction.

[0037] Exemplarily, in the utility model embodiment, by setting the liquid cooling plate 5, the battery pack structure can be cooled when operating in a high-temperature environment, so that the battery pack structure can work in a constant temperature state, and hot water can also be introduced into the liquid cooling plate 5, so that the battery pack structure can be heated by the liquid cooling plate 5 in a low-temperature environment, thereby assisting the heating film 3 to heat and insulate the battery module 2, and the heat preservation property of the structure is further improved.

[0038] Optionally, the battery energy distribution unit 6 is further included, and the battery energy distribution unit 6 is arranged at one end of the box body 1 close to the water inlet 51.

[0039] Exemplarily, in the utility model embodiment, by setting the battery energy distribution unit 6, various data of the battery can be collected, processed and stored, and the data includes but is not limited to the voltage, current and charging state of the battery. Through the data, the battery energy distribution unit 6 can judge the working state and health condition of the battery. By setting the battery energy distribution unit 6, the stability of the structure is further improved.

[0040] Optionally, the battery management system 7 is further included, and the battery management system 7 is arranged at one end of the box body 1 close to the water outlet 52.

[0041] Exemplarily, in the utility model embodiment, by setting the battery management system 7, each battery unit can be intelligently managed and maintained, the state of the battery can be monitored, overcharging and overdischarging of the battery can be prevented, and the service life of the battery is prolonged. The battery management system 7 collects and analyzes the voltage, current and temperature of the battery, realizes protection and management of the battery, and ensures safe operation of the battery. Meanwhile, in the embodiment, the liquid cooling plate 5 and the heating film 3 can be automatically managed by the battery management system. By setting the battery management system 7, the stability of the structure is further improved.

[0042] Unless otherwise defined, technical terms or scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms do not denote any order, quantity, or importance, but are used to distinguish one element from another, and the terms "a" or "an" do not denote a limitation of quantity but denote the presence of at least one. The terms "comprising", "including", and similar terms do not denote the presence of the elements or objects followed by the terms, but encompass the elements or objects followed by the terms, as well as equivalents thereof, and do not exclude other elements or objects. The terms "connected" or "coupled" do not denote a direct or mechanical connection or coupling, but can include an electrical connection or coupling, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positions, and can change when the absolute positions of the described objects change.

[0043] The above description is only some optional embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery pack structure, characterized in that, include: The casing (1), battery module (2), and heating film (3) The housing (1) has a rectangular structure. The battery module (2) and the heating film (3) are disposed inside the housing (1). The battery module (2) includes multiple battery cells (21). Multiple battery cells (21) are arranged side by side along the length direction of the housing (1). The heating film (3) is disposed at both ends of the length direction of the battery module (2). The heating film (3) includes two interlayers (31) and multiple heating units (32). The multiple heating units (32) are sandwiched between the two interlayers (31).

2. The battery pack structure according to claim 1, characterized in that, Multiple heating units (32) are connected in series.

3. The battery pack structure according to claim 1, characterized in that, Multiple heating units (32) are connected in parallel.

4. The battery pack structure according to claim 1, characterized in that, It also includes an aluminum bar (22), through which a plurality of the battery cells (21) are connected.

5. A battery pack structure according to claim 1, characterized in that, It also includes a crossbeam (4), and multiple battery modules (2) are provided. The multiple battery modules (2) are distributed in a rectangular array inside the housing (1), and the multiple battery modules (2) are separated by the crossbeam (4).

6. A battery pack structure according to claim 1, characterized in that, It also includes a liquid cooling plate (5), which is disposed at the bottom of the battery module (2). The liquid cooling plate (5) is provided with a water inlet (51) and a water outlet (52), which are disposed at one end of the casing (1) along the length direction.

7. A battery pack structure according to claim 6, characterized in that, It also includes a battery energy distribution unit (6), which is located inside the housing (1) at one end near the water inlet (51).

8. A battery pack structure according to claim 6, characterized in that, It also includes a battery management system (7), which is located inside the housing (1) at one end near the outlet (52).

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